cmake: Enforce -Werror=switch and -Werror=unused-variable

Port citra-emu/citra#5666: "Rotate previous log file to "citra_log.txt.old""

.ci/scripts/common/post-upload.sh

@@ -15,5 +15,5 @@ mv "${REV_NAME}-source.tar.xz" $RELEASE_NAME
 7z a "$REV_NAME.7z" $RELEASE_NAME
 
 # move the compiled archive into the artifacts directory to be uploaded by travis releases
-mv "$ARCHIVE_NAME" artifacts/
-mv "$REV_NAME.7z" artifacts/
+mv "$ARCHIVE_NAME" "${ARTIFACTS_DIR}/"
+mv "$REV_NAME.7z" "${ARTIFACTS_DIR}/"

.ci/scripts/common/pre-upload.sh

@@ -2,5 +2,6 @@
 
 GITDATE="`git show -s --date=short --format='%ad' | sed 's/-//g'`"
 GITREV="`git show -s --format='%h'`"
+ARTIFACTS_DIR="artifacts"
 
-mkdir -p artifacts
+mkdir -p "${ARTIFACTS_DIR}/"

.ci/scripts/linux/docker.sh

@@ -1,14 +1,54 @@
 #!/bin/bash -ex
 
+# Exit on error, rather than continuing with the rest of the script.
+set -e
+
 cd /yuzu
 
 ccache -s
 
 mkdir build || true && cd build
-cmake .. -G Ninja -DDISPLAY_VERSION=$1 -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/lib/ccache/gcc -DCMAKE_CXX_COMPILER=/usr/lib/ccache/g++ -DYUZU_ENABLE_COMPATIBILITY_REPORTING=${ENABLE_COMPATIBILITY_REPORTING:-"OFF"} -DENABLE_COMPATIBILITY_LIST_DOWNLOAD=ON -DUSE_DISCORD_PRESENCE=ON -DENABLE_QT_TRANSLATION=ON
+cmake .. -DDISPLAY_VERSION=$1 -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/lib/ccache/gcc -DCMAKE_CXX_COMPILER=/usr/lib/ccache/g++ -DYUZU_ENABLE_COMPATIBILITY_REPORTING=${ENABLE_COMPATIBILITY_REPORTING:-"OFF"} -DENABLE_COMPATIBILITY_LIST_DOWNLOAD=ON -DUSE_DISCORD_PRESENCE=ON -DENABLE_QT_TRANSLATION=ON -DCMAKE_INSTALL_PREFIX="/usr"
 
-ninja
+make -j$(nproc)
 
 ccache -s
 
 ctest -VV -C Release
+
+make install DESTDIR=AppDir
+rm -vf AppDir/usr/bin/yuzu-cmd AppDir/usr/bin/yuzu-tester
+
+# Download tools needed to build an AppImage
+wget -nc https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage
+wget -nc https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-x86_64.AppImage
+wget -nc https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-x86_64.AppImage
+wget -nc https://github.com/darealshinji/AppImageKit-checkrt/releases/download/continuous/AppRun-patched-x86_64
+wget -nc https://github.com/darealshinji/AppImageKit-checkrt/releases/download/continuous/exec-x86_64.so
+# Set executable bit
+chmod 755 \
+    appimagetool-x86_64.AppImage \
+    AppRun-patched-x86_64 \
+    exec-x86_64.so \
+    linuxdeploy-x86_64.AppImage \
+    linuxdeploy-plugin-qt-x86_64.AppImage
+
+# Workaround for https://github.com/AppImage/AppImageKit/issues/828
+export APPIMAGE_EXTRACT_AND_RUN=1
+
+mkdir -p AppDir/usr/optional
+mkdir -p AppDir/usr/optional/libstdc++
+mkdir -p AppDir/usr/optional/libgcc_s
+
+# Deploy yuzu's needed dependencies
+./linuxdeploy-x86_64.AppImage --appdir AppDir --plugin qt
+
+# Workaround for building yuzu with GCC 10 but also trying to distribute it to Ubuntu 18.04 et al.
+# See https://github.com/darealshinji/AppImageKit-checkrt
+cp exec-x86_64.so AppDir/usr/optional/exec.so
+cp AppRun-patched-x86_64 AppDir/AppRun
+cp --dereference /usr/lib/x86_64-linux-gnu/libstdc++.so.6 AppDir/usr/optional/libstdc++/libstdc++.so.6
+cp --dereference /lib/x86_64-linux-gnu/libgcc_s.so.1 AppDir/usr/optional/libgcc_s/libgcc_s.so.1
+
+# Build the AppImage
+./appimagetool-x86_64.AppImage AppDir

.ci/scripts/linux/upload.sh

@@ -2,6 +2,8 @@
 
 . .ci/scripts/common/pre-upload.sh
 
+APPIMAGE_NAME="yuzu-x86_64.AppImage"
+NEW_APPIMAGE_NAME="yuzu-${GITDATE}-${GITREV}-x86_64.AppImage"
 REV_NAME="yuzu-linux-${GITDATE}-${GITREV}"
 ARCHIVE_NAME="${REV_NAME}.tar.xz"
 COMPRESSION_FLAGS="-cJvf"
@@ -17,4 +19,7 @@ mkdir "$DIR_NAME"
 cp build/bin/yuzu-cmd "$DIR_NAME"
 cp build/bin/yuzu "$DIR_NAME"
 
+# Copy the AppImage to the artifacts directory and avoid compressing it
+cp "build/${APPIMAGE_NAME}" "${ARTIFACTS_DIR}/${NEW_APPIMAGE_NAME}"
+
 . .ci/scripts/common/post-upload.sh

.ci/templates/build-msvc.yml

@@ -8,7 +8,7 @@ steps:
   displayName: 'Install vulkan-sdk'
 - script: python -m pip install --upgrade pip conan
   displayName: 'Install conan'
-- script: refreshenv && mkdir build && cd build && cmake -G "Visual Studio 16 2019" -A x64 --config Release -DYUZU_USE_BUNDLED_QT=1 -DYUZU_USE_QT_WEB_ENGINE=ON -DENABLE_COMPATIBILITY_LIST_DOWNLOAD=ON -DYUZU_ENABLE_COMPATIBILITY_REPORTING=${COMPAT} -DUSE_DISCORD_PRESENCE=ON -DDISPLAY_VERSION=${{ parameters['version'] }} .. && cd ..
+- script: refreshenv && mkdir build && cd build && cmake -G "Visual Studio 16 2019" -A x64 --config Release -DYUZU_USE_BUNDLED_QT=1 -DYUZU_USE_QT_WEB_ENGINE=ON -DENABLE_COMPATIBILITY_LIST_DOWNLOAD=ON -DYUZU_ENABLE_COMPATIBILITY_REPORTING=${COMPAT} -DUSE_DISCORD_PRESENCE=ON -DENABLE_QT_TRANSLATION=ON -DDISPLAY_VERSION=${{ parameters['version'] }} .. && cd ..
   displayName: 'Configure CMake'
 - task: MSBuild@1
   displayName: 'Build'

CMakeLists.txt

@@ -24,10 +24,12 @@ option(YUZU_ENABLE_BOXCAT "Enable the Boxcat service, a yuzu high-level implemen
 
 option(ENABLE_CUBEB "Enables the cubeb audio backend" ON)
 
-option(ENABLE_VULKAN "Enables Vulkan backend" ON)
-
 option(USE_DISCORD_PRESENCE "Enables Discord Rich Presence" OFF)
 
+if (NOT ENABLE_WEB_SERVICE)
+    set(YUZU_ENABLE_BOXCAT OFF)
+endif()
+
 # Default to a Release build
 get_property(IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
 if (NOT IS_MULTI_CONFIG AND NOT CMAKE_BUILD_TYPE)
@@ -167,7 +169,7 @@ macro(yuzu_find_packages)
         "lz4               1.8         lz4/1.9.2"
         "nlohmann_json     3.8         nlohmann_json/3.8.0"
         "ZLIB              1.2         zlib/1.2.11"
-        "zstd              1.4         zstd/1.4.5"
+        "zstd              1.4         zstd/1.4.8"
     )
 
     foreach(PACKAGE ${REQUIRED_LIBS})
@@ -241,7 +243,7 @@ if(ENABLE_QT)
     if (YUZU_USE_QT_WEB_ENGINE)
         find_package(Qt5 COMPONENTS WebEngineCore WebEngineWidgets)
     endif()
-	
+
     if (ENABLE_QT_TRANSLATION)
         find_package(Qt5 REQUIRED COMPONENTS LinguistTools ${QT_PREFIX_HINT})
     endif()
@@ -324,7 +326,7 @@ if (CONAN_REQUIRED_LIBS)
             list(APPEND Boost_LIBRARIES Boost::context)
         endif()
     endif()
-    
+
     # Due to issues with variable scopes in functions, we need to also find_package(qt5) outside of the function
     if(ENABLE_QT)
         list(APPEND CMAKE_MODULE_PATH "${CONAN_QT_ROOT_RELEASE}")

README.md

@@ -30,7 +30,6 @@ If you want to contribute to the user interface translation, please check out th
 
 * __Windows__: [Windows Build](https://github.com/yuzu-emu/yuzu/wiki/Building-For-Windows)
 * __Linux__: [Linux Build](https://github.com/yuzu-emu/yuzu/wiki/Building-For-Linux)
-* __macOS__: [macOS Build](https://github.com/yuzu-emu/yuzu/wiki/Building-for-macOS)
 
 
 ### Support

externals/CMakeLists.txt

@@ -61,9 +61,7 @@ if (USE_DISCORD_PRESENCE)
 endif()
 
 # Sirit
-if (ENABLE_VULKAN)
-    add_subdirectory(sirit)
-endif()
+add_subdirectory(sirit)
 
 # libzip
 find_package(Libzip 1.5)

src/CMakeLists.txt

@@ -45,10 +45,15 @@ if (MSVC)
 
         # Warnings
         /W3
+        /we4062 # enumerator 'identifier' in a switch of enum 'enumeration' is not handled
+        /we4101 # 'identifier': unreferenced local variable
+        /we4265 # 'class': class has virtual functions, but destructor is not virtual
+        /we4388 # signed/unsigned mismatch
         /we4547 # 'operator' : operator before comma has no effect; expected operator with side-effect
         /we4549 # 'operator1': operator before comma has no effect; did you intend 'operator2'?
         /we4555 # Expression has no effect; expected expression with side-effect
         /we4834 # Discarding return value of function with 'nodiscard' attribute
+        /we5038 # data member 'member1' will be initialized after data member 'member2'
     )
 
     # /GS- - No stack buffer overflow checks
@@ -62,7 +67,10 @@ else()
         -Werror=implicit-fallthrough
         -Werror=missing-declarations
         -Werror=reorder
+        -Werror=switch
+        -Werror=uninitialized
         -Werror=unused-result
+        -Werror=unused-variable
         -Wextra
         -Wmissing-declarations
         -Wno-attributes

src/audio_core/algorithm/interpolate.cpp

@@ -218,7 +218,7 @@ void Resample(s32* output, const s32* input, s32 pitch, s32& fraction, std::size
         const auto l2 = lut[lut_index + 2];
         const auto l3 = lut[lut_index + 3];
 
-        const auto s0 = static_cast<s32>(input[index]);
+        const auto s0 = static_cast<s32>(input[index + 0]);
         const auto s1 = static_cast<s32>(input[index + 1]);
         const auto s2 = static_cast<s32>(input[index + 2]);
         const auto s3 = static_cast<s32>(input[index + 3]);

src/audio_core/audio_renderer.cpp

@@ -11,7 +11,6 @@
 #include "audio_core/info_updater.h"
 #include "audio_core/voice_context.h"
 #include "common/logging/log.h"
-#include "core/hle/kernel/writable_event.h"
 #include "core/memory.h"
 #include "core/settings.h"
 
@@ -71,10 +70,9 @@ namespace {
 namespace AudioCore {
 AudioRenderer::AudioRenderer(Core::Timing::CoreTiming& core_timing, Core::Memory::Memory& memory_,
                              AudioCommon::AudioRendererParameter params,
-                             std::shared_ptr<Kernel::WritableEvent> buffer_event_,
+                             Stream::ReleaseCallback&& release_callback,
                              std::size_t instance_number)
-    : worker_params{params}, buffer_event{buffer_event_},
-      memory_pool_info(params.effect_count + params.voice_count * 4),
+    : worker_params{params}, memory_pool_info(params.effect_count + params.voice_count * 4),
       voice_context(params.voice_count), effect_context(params.effect_count), mix_context(),
       sink_context(params.sink_count), splitter_context(),
       voices(params.voice_count), memory{memory_},
@@ -85,10 +83,9 @@ AudioRenderer::AudioRenderer(Core::Timing::CoreTiming& core_timing, Core::Memory
                                 params.num_splitter_send_channels);
     mix_context.Initialize(behavior_info, params.submix_count + 1, params.effect_count);
     audio_out = std::make_unique<AudioCore::AudioOut>();
-    stream =
-        audio_out->OpenStream(core_timing, params.sample_rate, AudioCommon::STREAM_NUM_CHANNELS,
-                              fmt::format("AudioRenderer-Instance{}", instance_number),
-                              [=]() { buffer_event_->Signal(); });
+    stream = audio_out->OpenStream(
+        core_timing, params.sample_rate, AudioCommon::STREAM_NUM_CHANNELS,
+        fmt::format("AudioRenderer-Instance{}", instance_number), std::move(release_callback));
     audio_out->StartStream(stream);
 
     QueueMixedBuffer(0);

src/audio_core/audio_renderer.h

@@ -27,10 +27,6 @@ namespace Core::Timing {
 class CoreTiming;
 }
 
-namespace Kernel {
-class WritableEvent;
-}
-
 namespace Core::Memory {
 class Memory;
 }
@@ -44,8 +40,7 @@ class AudioRenderer {
 public:
     AudioRenderer(Core::Timing::CoreTiming& core_timing, Core::Memory::Memory& memory_,
                   AudioCommon::AudioRendererParameter params,
-                  std::shared_ptr<Kernel::WritableEvent> buffer_event_,
-                  std::size_t instance_number);
+                  Stream::ReleaseCallback&& release_callback, std::size_t instance_number);
     ~AudioRenderer();
 
     [[nodiscard]] ResultCode UpdateAudioRenderer(const std::vector<u8>& input_params,
@@ -61,7 +56,6 @@ private:
     BehaviorInfo behavior_info{};
 
     AudioCommon::AudioRendererParameter worker_params;
-    std::shared_ptr<Kernel::WritableEvent> buffer_event;
     std::vector<ServerMemoryPoolInfo> memory_pool_info;
     VoiceContext voice_context;
     EffectContext effect_context;

src/audio_core/stream.cpp

@@ -130,7 +130,11 @@ bool Stream::ContainsBuffer([[maybe_unused]] Buffer::Tag tag) const {
 std::vector<Buffer::Tag> Stream::GetTagsAndReleaseBuffers(std::size_t max_count) {
     std::vector<Buffer::Tag> tags;
     for (std::size_t count = 0; count < max_count && !released_buffers.empty(); ++count) {
-        tags.push_back(released_buffers.front()->GetTag());
+        if (released_buffers.front()) {
+            tags.push_back(released_buffers.front()->GetTag());
+        } else {
+            ASSERT_MSG(false, "Invalid tag in released_buffers!");
+        }
         released_buffers.pop();
     }
     return tags;
@@ -140,7 +144,11 @@ std::vector<Buffer::Tag> Stream::GetTagsAndReleaseBuffers() {
     std::vector<Buffer::Tag> tags;
     tags.reserve(released_buffers.size());
     while (!released_buffers.empty()) {
-        tags.push_back(released_buffers.front()->GetTag());
+        if (released_buffers.front()) {
+            tags.push_back(released_buffers.front()->GetTag());
+        } else {
+            ASSERT_MSG(false, "Invalid tag in released_buffers!");
+        }
         released_buffers.pop();
     }
     return tags;

src/common/CMakeLists.txt

@@ -104,6 +104,7 @@ add_library(common STATIC
     detached_tasks.h
     bit_cast.h
     bit_field.h
+    bit_set.h
     bit_util.h
     cityhash.cpp
     cityhash.h
@@ -122,6 +123,7 @@ add_library(common STATIC
     hash.h
     hex_util.cpp
     hex_util.h
+    intrusive_red_black_tree.h
     logging/backend.cpp
     logging/backend.h
     logging/filter.cpp
@@ -134,17 +136,15 @@ add_library(common STATIC
     math_util.h
     memory_detect.cpp
     memory_detect.h
-    memory_hook.cpp
-    memory_hook.h
     microprofile.cpp
     microprofile.h
     microprofileui.h
     misc.cpp
-    multi_level_queue.h
     page_table.cpp
     page_table.h
     param_package.cpp
     param_package.h
+    parent_of_member.h
     quaternion.h
     ring_buffer.h
     scm_rev.cpp
@@ -162,11 +162,14 @@ add_library(common STATIC
     thread.cpp
     thread.h
     thread_queue_list.h
+    thread_worker.cpp
+    thread_worker.h
     threadsafe_queue.h
     time_zone.cpp
     time_zone.h
     timer.cpp
     timer.h
+    tree.h
     uint128.cpp
     uint128.h
     uuid.cpp

src/common/bit_set.h

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <array>
+#include <bit>
+
+#include "common/alignment.h"
+#include "common/bit_util.h"
+#include "common/common_types.h"
+
+namespace Common {
+
+namespace impl {
+
+template <typename Storage, size_t N>
+class BitSet {
+
+public:
+    constexpr BitSet() = default;
+
+    constexpr void SetBit(size_t i) {
+        this->words[i / FlagsPerWord] |= GetBitMask(i % FlagsPerWord);
+    }
+
+    constexpr void ClearBit(size_t i) {
+        this->words[i / FlagsPerWord] &= ~GetBitMask(i % FlagsPerWord);
+    }
+
+    constexpr size_t CountLeadingZero() const {
+        for (size_t i = 0; i < NumWords; i++) {
+            if (this->words[i]) {
+                return FlagsPerWord * i + CountLeadingZeroImpl(this->words[i]);
+            }
+        }
+        return FlagsPerWord * NumWords;
+    }
+
+    constexpr size_t GetNextSet(size_t n) const {
+        for (size_t i = (n + 1) / FlagsPerWord; i < NumWords; i++) {
+            Storage word = this->words[i];
+            if (!IsAligned(n + 1, FlagsPerWord)) {
+                word &= GetBitMask(n % FlagsPerWord) - 1;
+            }
+            if (word) {
+                return FlagsPerWord * i + CountLeadingZeroImpl(word);
+            }
+        }
+        return FlagsPerWord * NumWords;
+    }
+
+private:
+    static_assert(std::is_unsigned_v<Storage>);
+    static_assert(sizeof(Storage) <= sizeof(u64));
+
+    static constexpr size_t FlagsPerWord = BitSize<Storage>();
+    static constexpr size_t NumWords = AlignUp(N, FlagsPerWord) / FlagsPerWord;
+
+    static constexpr auto CountLeadingZeroImpl(Storage word) {
+        return std::countl_zero(static_cast<unsigned long long>(word)) -
+               (BitSize<unsigned long long>() - FlagsPerWord);
+    }
+
+    static constexpr Storage GetBitMask(size_t bit) {
+        return Storage(1) << (FlagsPerWord - 1 - bit);
+    }
+
+    std::array<Storage, NumWords> words{};
+};
+
+} // namespace impl
+
+template <size_t N>
+using BitSet8 = impl::BitSet<u8, N>;
+
+template <size_t N>
+using BitSet16 = impl::BitSet<u16, N>;
+
+template <size_t N>
+using BitSet32 = impl::BitSet<u32, N>;
+
+template <size_t N>
+using BitSet64 = impl::BitSet<u64, N>;
+
+} // namespace Common

src/common/common_funcs.h

@@ -93,6 +93,14 @@ __declspec(dllimport) void __stdcall DebugBreak(void);
         return static_cast<T>(key) == 0;                                                           \
     }
 
+/// Evaluates a boolean expression, and returns a result unless that expression is true.
+#define R_UNLESS(expr, res)                                                                        \
+    {                                                                                              \
+        if (!(expr)) {                                                                             \
+            return res;                                                                            \
+        }                                                                                          \
+    }
+
 namespace Common {
 
 [[nodiscard]] constexpr u32 MakeMagic(char a, char b, char c, char d) {

src/common/concepts.h

@@ -31,4 +31,8 @@ concept DerivedFrom = requires {
     std::is_convertible_v<const volatile Derived*, const volatile Base*>;
 };
 
+// TODO: Replace with std::convertible_to when libc++ implements it.
+template <typename From, typename To>
+concept ConvertibleTo = std::is_convertible_v<From, To>;
+
 } // namespace Common

src/common/div_ceil.h

@@ -11,16 +11,16 @@ namespace Common {
 
 /// Ceiled integer division.
 template <typename N, typename D>
-requires std::is_integral_v<N>&& std::is_unsigned_v<D>[[nodiscard]] constexpr auto DivCeil(
-    N number, D divisor) {
-    return (static_cast<D>(number) + divisor - 1) / divisor;
+requires std::is_integral_v<N>&& std::is_unsigned_v<D>[[nodiscard]] constexpr N DivCeil(N number,
+                                                                                        D divisor) {
+    return static_cast<N>((static_cast<D>(number) + divisor - 1) / divisor);
 }
 
 /// Ceiled integer division with logarithmic divisor in base 2
 template <typename N, typename D>
-requires std::is_integral_v<N>&& std::is_unsigned_v<D>[[nodiscard]] constexpr auto DivCeilLog2(
+requires std::is_integral_v<N>&& std::is_unsigned_v<D>[[nodiscard]] constexpr N DivCeilLog2(
     N value, D alignment_log2) {
-    return (static_cast<D>(value) + (D(1) << alignment_log2) - 1) >> alignment_log2;
+    return static_cast<N>((static_cast<D>(value) + (D(1) << alignment_log2) - 1) >> alignment_log2);
 }
 
 } // namespace Common

src/common/intrusive_red_black_tree.h

@@ -0,0 +1,627 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/parent_of_member.h"
+#include "common/tree.h"
+
+namespace Common {
+
+namespace impl {
+
+class IntrusiveRedBlackTreeImpl;
+
+}
+
+struct IntrusiveRedBlackTreeNode {
+
+private:
+    RB_ENTRY(IntrusiveRedBlackTreeNode) entry{};
+
+    friend class impl::IntrusiveRedBlackTreeImpl;
+
+    template <class, class, class>
+    friend class IntrusiveRedBlackTree;
+
+public:
+    constexpr IntrusiveRedBlackTreeNode() = default;
+};
+
+template <class T, class Traits, class Comparator>
+class IntrusiveRedBlackTree;
+
+namespace impl {
+
+class IntrusiveRedBlackTreeImpl {
+
+private:
+    template <class, class, class>
+    friend class ::Common::IntrusiveRedBlackTree;
+
+private:
+    RB_HEAD(IntrusiveRedBlackTreeRoot, IntrusiveRedBlackTreeNode);
+    using RootType = IntrusiveRedBlackTreeRoot;
+
+private:
+    IntrusiveRedBlackTreeRoot root;
+
+public:
+    template <bool Const>
+    class Iterator;
+
+    using value_type = IntrusiveRedBlackTreeNode;
+    using size_type = size_t;
+    using difference_type = ptrdiff_t;
+    using pointer = value_type*;
+    using const_pointer = const value_type*;
+    using reference = value_type&;
+    using const_reference = const value_type&;
+    using iterator = Iterator<false>;
+    using const_iterator = Iterator<true>;
+
+    template <bool Const>
+    class Iterator {
+    public:
+        using iterator_category = std::bidirectional_iterator_tag;
+        using value_type = typename IntrusiveRedBlackTreeImpl::value_type;
+        using difference_type = typename IntrusiveRedBlackTreeImpl::difference_type;
+        using pointer = std::conditional_t<Const, IntrusiveRedBlackTreeImpl::const_pointer,
+                                           IntrusiveRedBlackTreeImpl::pointer>;
+        using reference = std::conditional_t<Const, IntrusiveRedBlackTreeImpl::const_reference,
+                                             IntrusiveRedBlackTreeImpl::reference>;
+
+    private:
+        pointer node;
+
+    public:
+        explicit Iterator(pointer n) : node(n) {}
+
+        bool operator==(const Iterator& rhs) const {
+            return this->node == rhs.node;
+        }
+
+        bool operator!=(const Iterator& rhs) const {
+            return !(*this == rhs);
+        }
+
+        pointer operator->() const {
+            return this->node;
+        }
+
+        reference operator*() const {
+            return *this->node;
+        }
+
+        Iterator& operator++() {
+            this->node = GetNext(this->node);
+            return *this;
+        }
+
+        Iterator& operator--() {
+            this->node = GetPrev(this->node);
+            return *this;
+        }
+
+        Iterator operator++(int) {
+            const Iterator it{*this};
+            ++(*this);
+            return it;
+        }
+
+        Iterator operator--(int) {
+            const Iterator it{*this};
+            --(*this);
+            return it;
+        }
+
+        operator Iterator<true>() const {
+            return Iterator<true>(this->node);
+        }
+    };
+
+protected:
+    // Generate static implementations for non-comparison operations for IntrusiveRedBlackTreeRoot.
+    RB_GENERATE_WITHOUT_COMPARE_STATIC(IntrusiveRedBlackTreeRoot, IntrusiveRedBlackTreeNode, entry);
+
+private:
+    // Define accessors using RB_* functions.
+    constexpr void InitializeImpl() {
+        RB_INIT(&this->root);
+    }
+
+    bool EmptyImpl() const {
+        return RB_EMPTY(&this->root);
+    }
+
+    IntrusiveRedBlackTreeNode* GetMinImpl() const {
+        return RB_MIN(IntrusiveRedBlackTreeRoot,
+                      const_cast<IntrusiveRedBlackTreeRoot*>(&this->root));
+    }
+
+    IntrusiveRedBlackTreeNode* GetMaxImpl() const {
+        return RB_MAX(IntrusiveRedBlackTreeRoot,
+                      const_cast<IntrusiveRedBlackTreeRoot*>(&this->root));
+    }
+
+    IntrusiveRedBlackTreeNode* RemoveImpl(IntrusiveRedBlackTreeNode* node) {
+        return RB_REMOVE(IntrusiveRedBlackTreeRoot, &this->root, node);
+    }
+
+public:
+    static IntrusiveRedBlackTreeNode* GetNext(IntrusiveRedBlackTreeNode* node) {
+        return RB_NEXT(IntrusiveRedBlackTreeRoot, nullptr, node);
+    }
+
+    static IntrusiveRedBlackTreeNode* GetPrev(IntrusiveRedBlackTreeNode* node) {
+        return RB_PREV(IntrusiveRedBlackTreeRoot, nullptr, node);
+    }
+
+    static IntrusiveRedBlackTreeNode const* GetNext(const IntrusiveRedBlackTreeNode* node) {
+        return static_cast<const IntrusiveRedBlackTreeNode*>(
+            GetNext(const_cast<IntrusiveRedBlackTreeNode*>(node)));
+    }
+
+    static IntrusiveRedBlackTreeNode const* GetPrev(const IntrusiveRedBlackTreeNode* node) {
+        return static_cast<const IntrusiveRedBlackTreeNode*>(
+            GetPrev(const_cast<IntrusiveRedBlackTreeNode*>(node)));
+    }
+
+public:
+    constexpr IntrusiveRedBlackTreeImpl() : root() {
+        this->InitializeImpl();
+    }
+
+    // Iterator accessors.
+    iterator begin() {
+        return iterator(this->GetMinImpl());
+    }
+
+    const_iterator begin() const {
+        return const_iterator(this->GetMinImpl());
+    }
+
+    iterator end() {
+        return iterator(static_cast<IntrusiveRedBlackTreeNode*>(nullptr));
+    }
+
+    const_iterator end() const {
+        return const_iterator(static_cast<const IntrusiveRedBlackTreeNode*>(nullptr));
+    }
+
+    const_iterator cbegin() const {
+        return this->begin();
+    }
+
+    const_iterator cend() const {
+        return this->end();
+    }
+
+    iterator iterator_to(reference ref) {
+        return iterator(&ref);
+    }
+
+    const_iterator iterator_to(const_reference ref) const {
+        return const_iterator(&ref);
+    }
+
+    // Content management.
+    bool empty() const {
+        return this->EmptyImpl();
+    }
+
+    reference back() {
+        return *this->GetMaxImpl();
+    }
+
+    const_reference back() const {
+        return *this->GetMaxImpl();
+    }
+
+    reference front() {
+        return *this->GetMinImpl();
+    }
+
+    const_reference front() const {
+        return *this->GetMinImpl();
+    }
+
+    iterator erase(iterator it) {
+        auto cur = std::addressof(*it);
+        auto next = GetNext(cur);
+        this->RemoveImpl(cur);
+        return iterator(next);
+    }
+};
+
+} // namespace impl
+
+template <typename T>
+concept HasLightCompareType = requires {
+    { std::is_same<typename T::LightCompareType, void>::value }
+    ->std::convertible_to<bool>;
+};
+
+namespace impl {
+
+template <typename T, typename Default>
+consteval auto* GetLightCompareType() {
+    if constexpr (HasLightCompareType<T>) {
+        return static_cast<typename T::LightCompareType*>(nullptr);
+    } else {
+        return static_cast<Default*>(nullptr);
+    }
+}
+
+} // namespace impl
+
+template <typename T, typename Default>
+using LightCompareType = std::remove_pointer_t<decltype(impl::GetLightCompareType<T, Default>())>;
+
+template <class T, class Traits, class Comparator>
+class IntrusiveRedBlackTree {
+
+public:
+    using ImplType = impl::IntrusiveRedBlackTreeImpl;
+
+private:
+    ImplType impl{};
+
+public:
+    struct IntrusiveRedBlackTreeRootWithCompare : ImplType::IntrusiveRedBlackTreeRoot {};
+
+    template <bool Const>
+    class Iterator;
+
+    using value_type = T;
+    using size_type = size_t;
+    using difference_type = ptrdiff_t;
+    using pointer = T*;
+    using const_pointer = const T*;
+    using reference = T&;
+    using const_reference = const T&;
+    using iterator = Iterator<false>;
+    using const_iterator = Iterator<true>;
+
+    using light_value_type = LightCompareType<Comparator, value_type>;
+    using const_light_pointer = const light_value_type*;
+    using const_light_reference = const light_value_type&;
+
+    template <bool Const>
+    class Iterator {
+    public:
+        friend class IntrusiveRedBlackTree<T, Traits, Comparator>;
+
+        using ImplIterator =
+            std::conditional_t<Const, ImplType::const_iterator, ImplType::iterator>;
+
+        using iterator_category = std::bidirectional_iterator_tag;
+        using value_type = typename IntrusiveRedBlackTree::value_type;
+        using difference_type = typename IntrusiveRedBlackTree::difference_type;
+        using pointer = std::conditional_t<Const, IntrusiveRedBlackTree::const_pointer,
+                                           IntrusiveRedBlackTree::pointer>;
+        using reference = std::conditional_t<Const, IntrusiveRedBlackTree::const_reference,
+                                             IntrusiveRedBlackTree::reference>;
+
+    private:
+        ImplIterator iterator;
+
+    private:
+        explicit Iterator(ImplIterator it) : iterator(it) {}
+
+        explicit Iterator(typename std::conditional<Const, ImplType::const_iterator,
+                                                    ImplType::iterator>::type::pointer ptr)
+            : iterator(ptr) {}
+
+        ImplIterator GetImplIterator() const {
+            return this->iterator;
+        }
+
+    public:
+        bool operator==(const Iterator& rhs) const {
+            return this->iterator == rhs.iterator;
+        }
+
+        bool operator!=(const Iterator& rhs) const {
+            return !(*this == rhs);
+        }
+
+        pointer operator->() const {
+            return Traits::GetParent(std::addressof(*this->iterator));
+        }
+
+        reference operator*() const {
+            return *Traits::GetParent(std::addressof(*this->iterator));
+        }
+
+        Iterator& operator++() {
+            ++this->iterator;
+            return *this;
+        }
+
+        Iterator& operator--() {
+            --this->iterator;
+            return *this;
+        }
+
+        Iterator operator++(int) {
+            const Iterator it{*this};
+            ++this->iterator;
+            return it;
+        }
+
+        Iterator operator--(int) {
+            const Iterator it{*this};
+            --this->iterator;
+            return it;
+        }
+
+        operator Iterator<true>() const {
+            return Iterator<true>(this->iterator);
+        }
+    };
+
+private:
+    // Generate static implementations for comparison operations for IntrusiveRedBlackTreeRoot.
+    RB_GENERATE_WITH_COMPARE_STATIC(IntrusiveRedBlackTreeRootWithCompare, IntrusiveRedBlackTreeNode,
+                                    entry, CompareImpl, LightCompareImpl);
+
+private:
+    static int CompareImpl(const IntrusiveRedBlackTreeNode* lhs,
+                           const IntrusiveRedBlackTreeNode* rhs) {
+        return Comparator::Compare(*Traits::GetParent(lhs), *Traits::GetParent(rhs));
+    }
+
+    static int LightCompareImpl(const void* elm, const IntrusiveRedBlackTreeNode* rhs) {
+        return Comparator::Compare(*static_cast<const_light_pointer>(elm), *Traits::GetParent(rhs));
+    }
+
+    // Define accessors using RB_* functions.
+    IntrusiveRedBlackTreeNode* InsertImpl(IntrusiveRedBlackTreeNode* node) {
+        return RB_INSERT(IntrusiveRedBlackTreeRootWithCompare,
+                         static_cast<IntrusiveRedBlackTreeRootWithCompare*>(&this->impl.root),
+                         node);
+    }
+
+    IntrusiveRedBlackTreeNode* FindImpl(const IntrusiveRedBlackTreeNode* node) const {
+        return RB_FIND(
+            IntrusiveRedBlackTreeRootWithCompare,
+            const_cast<IntrusiveRedBlackTreeRootWithCompare*>(
+                static_cast<const IntrusiveRedBlackTreeRootWithCompare*>(&this->impl.root)),
+            const_cast<IntrusiveRedBlackTreeNode*>(node));
+    }
+
+    IntrusiveRedBlackTreeNode* NFindImpl(const IntrusiveRedBlackTreeNode* node) const {
+        return RB_NFIND(
+            IntrusiveRedBlackTreeRootWithCompare,
+            const_cast<IntrusiveRedBlackTreeRootWithCompare*>(
+                static_cast<const IntrusiveRedBlackTreeRootWithCompare*>(&this->impl.root)),
+            const_cast<IntrusiveRedBlackTreeNode*>(node));
+    }
+
+    IntrusiveRedBlackTreeNode* FindLightImpl(const_light_pointer lelm) const {
+        return RB_FIND_LIGHT(
+            IntrusiveRedBlackTreeRootWithCompare,
+            const_cast<IntrusiveRedBlackTreeRootWithCompare*>(
+                static_cast<const IntrusiveRedBlackTreeRootWithCompare*>(&this->impl.root)),
+            static_cast<const void*>(lelm));
+    }
+
+    IntrusiveRedBlackTreeNode* NFindLightImpl(const_light_pointer lelm) const {
+        return RB_NFIND_LIGHT(
+            IntrusiveRedBlackTreeRootWithCompare,
+            const_cast<IntrusiveRedBlackTreeRootWithCompare*>(
+                static_cast<const IntrusiveRedBlackTreeRootWithCompare*>(&this->impl.root)),
+            static_cast<const void*>(lelm));
+    }
+
+public:
+    constexpr IntrusiveRedBlackTree() = default;
+
+    // Iterator accessors.
+    iterator begin() {
+        return iterator(this->impl.begin());
+    }
+
+    const_iterator begin() const {
+        return const_iterator(this->impl.begin());
+    }
+
+    iterator end() {
+        return iterator(this->impl.end());
+    }
+
+    const_iterator end() const {
+        return const_iterator(this->impl.end());
+    }
+
+    const_iterator cbegin() const {
+        return this->begin();
+    }
+
+    const_iterator cend() const {
+        return this->end();
+    }
+
+    iterator iterator_to(reference ref) {
+        return iterator(this->impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
+    }
+
+    const_iterator iterator_to(const_reference ref) const {
+        return const_iterator(this->impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
+    }
+
+    // Content management.
+    bool empty() const {
+        return this->impl.empty();
+    }
+
+    reference back() {
+        return *Traits::GetParent(std::addressof(this->impl.back()));
+    }
+
+    const_reference back() const {
+        return *Traits::GetParent(std::addressof(this->impl.back()));
+    }
+
+    reference front() {
+        return *Traits::GetParent(std::addressof(this->impl.front()));
+    }
+
+    const_reference front() const {
+        return *Traits::GetParent(std::addressof(this->impl.front()));
+    }
+
+    iterator erase(iterator it) {
+        return iterator(this->impl.erase(it.GetImplIterator()));
+    }
+
+    iterator insert(reference ref) {
+        ImplType::pointer node = Traits::GetNode(std::addressof(ref));
+        this->InsertImpl(node);
+        return iterator(node);
+    }
+
+    iterator find(const_reference ref) const {
+        return iterator(this->FindImpl(Traits::GetNode(std::addressof(ref))));
+    }
+
+    iterator nfind(const_reference ref) const {
+        return iterator(this->NFindImpl(Traits::GetNode(std::addressof(ref))));
+    }
+
+    iterator find_light(const_light_reference ref) const {
+        return iterator(this->FindLightImpl(std::addressof(ref)));
+    }
+
+    iterator nfind_light(const_light_reference ref) const {
+        return iterator(this->NFindLightImpl(std::addressof(ref)));
+    }
+};
+
+template <auto T, class Derived = impl::GetParentType<T>>
+class IntrusiveRedBlackTreeMemberTraits;
+
+template <class Parent, IntrusiveRedBlackTreeNode Parent::*Member, class Derived>
+class IntrusiveRedBlackTreeMemberTraits<Member, Derived> {
+public:
+    template <class Comparator>
+    using TreeType = IntrusiveRedBlackTree<Derived, IntrusiveRedBlackTreeMemberTraits, Comparator>;
+    using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
+
+private:
+    template <class, class, class>
+    friend class IntrusiveRedBlackTree;
+
+    friend class impl::IntrusiveRedBlackTreeImpl;
+
+    static constexpr IntrusiveRedBlackTreeNode* GetNode(Derived* parent) {
+        return std::addressof(parent->*Member);
+    }
+
+    static constexpr IntrusiveRedBlackTreeNode const* GetNode(Derived const* parent) {
+        return std::addressof(parent->*Member);
+    }
+
+    static constexpr Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
+        return GetParentPointer<Member, Derived>(node);
+    }
+
+    static constexpr Derived const* GetParent(const IntrusiveRedBlackTreeNode* node) {
+        return GetParentPointer<Member, Derived>(node);
+    }
+
+private:
+    static constexpr TypedStorage<Derived> DerivedStorage = {};
+    static_assert(GetParent(GetNode(GetPointer(DerivedStorage))) == GetPointer(DerivedStorage));
+};
+
+template <auto T, class Derived = impl::GetParentType<T>>
+class IntrusiveRedBlackTreeMemberTraitsDeferredAssert;
+
+template <class Parent, IntrusiveRedBlackTreeNode Parent::*Member, class Derived>
+class IntrusiveRedBlackTreeMemberTraitsDeferredAssert<Member, Derived> {
+public:
+    template <class Comparator>
+    using TreeType =
+        IntrusiveRedBlackTree<Derived, IntrusiveRedBlackTreeMemberTraitsDeferredAssert, Comparator>;
+    using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
+
+    static constexpr bool IsValid() {
+        TypedStorage<Derived> DerivedStorage = {};
+        return GetParent(GetNode(GetPointer(DerivedStorage))) == GetPointer(DerivedStorage);
+    }
+
+private:
+    template <class, class, class>
+    friend class IntrusiveRedBlackTree;
+
+    friend class impl::IntrusiveRedBlackTreeImpl;
+
+    static constexpr IntrusiveRedBlackTreeNode* GetNode(Derived* parent) {
+        return std::addressof(parent->*Member);
+    }
+
+    static constexpr IntrusiveRedBlackTreeNode const* GetNode(Derived const* parent) {
+        return std::addressof(parent->*Member);
+    }
+
+    static constexpr Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
+        return GetParentPointer<Member, Derived>(node);
+    }
+
+    static constexpr Derived const* GetParent(const IntrusiveRedBlackTreeNode* node) {
+        return GetParentPointer<Member, Derived>(node);
+    }
+};
+
+template <class Derived>
+class IntrusiveRedBlackTreeBaseNode : public IntrusiveRedBlackTreeNode {
+public:
+    constexpr Derived* GetPrev() {
+        return static_cast<Derived*>(impl::IntrusiveRedBlackTreeImpl::GetPrev(this));
+    }
+    constexpr const Derived* GetPrev() const {
+        return static_cast<const Derived*>(impl::IntrusiveRedBlackTreeImpl::GetPrev(this));
+    }
+
+    constexpr Derived* GetNext() {
+        return static_cast<Derived*>(impl::IntrusiveRedBlackTreeImpl::GetNext(this));
+    }
+    constexpr const Derived* GetNext() const {
+        return static_cast<const Derived*>(impl::IntrusiveRedBlackTreeImpl::GetNext(this));
+    }
+};
+
+template <class Derived>
+class IntrusiveRedBlackTreeBaseTraits {
+public:
+    template <class Comparator>
+    using TreeType = IntrusiveRedBlackTree<Derived, IntrusiveRedBlackTreeBaseTraits, Comparator>;
+    using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
+
+private:
+    template <class, class, class>
+    friend class IntrusiveRedBlackTree;
+
+    friend class impl::IntrusiveRedBlackTreeImpl;
+
+    static constexpr IntrusiveRedBlackTreeNode* GetNode(Derived* parent) {
+        return static_cast<IntrusiveRedBlackTreeNode*>(parent);
+    }
+
+    static constexpr IntrusiveRedBlackTreeNode const* GetNode(Derived const* parent) {
+        return static_cast<const IntrusiveRedBlackTreeNode*>(parent);
+    }
+
+    static constexpr Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
+        return static_cast<Derived*>(node);
+    }
+
+    static constexpr Derived const* GetParent(const IntrusiveRedBlackTreeNode* node) {
+        return static_cast<const Derived*>(node);
+    }
+};
+
+} // namespace Common

src/common/logging/backend.cpp

@@ -145,10 +145,18 @@ void ColorConsoleBackend::Write(const Entry& entry) {
     PrintColoredMessage(entry);
 }
 
-// _SH_DENYWR allows read only access to the file for other programs.
-// It is #defined to 0 on other platforms
-FileBackend::FileBackend(const std::string& filename)
-    : file(filename, "w", _SH_DENYWR), bytes_written(0) {}
+FileBackend::FileBackend(const std::string& filename) : bytes_written(0) {
+    if (Common::FS::Exists(filename + ".old.txt")) {
+        Common::FS::Delete(filename + ".old.txt");
+    }
+    if (Common::FS::Exists(filename)) {
+        Common::FS::Rename(filename, filename + ".old.txt");
+    }
+
+    // _SH_DENYWR allows read only access to the file for other programs.
+    // It is #defined to 0 on other platforms
+    file = Common::FS::IOFile(filename, "w", _SH_DENYWR);
+}
 
 void FileBackend::Write(const Entry& entry) {
     // prevent logs from going over the maximum size (in case its spamming and the user doesn't

src/common/memory_hook.cpp

@@ -1,11 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include "common/memory_hook.h"
-
-namespace Common {
-
-MemoryHook::~MemoryHook() = default;
-
-} // namespace Common

src/common/memory_hook.h

@@ -1,47 +0,0 @@
-// Copyright 2016 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include <optional>
-
-#include "common/common_types.h"
-
-namespace Common {
-
-/**
- * Memory hooks have two purposes:
- * 1. To allow reads and writes to a region of memory to be intercepted. This is used to implement
- *    texture forwarding and memory breakpoints for debugging.
- * 2. To allow for the implementation of MMIO devices.
- *
- * A hook may be mapped to multiple regions of memory.
- *
- * If a std::nullopt or false is returned from a function, the read/write request is passed through
- * to the underlying memory region.
- */
-class MemoryHook {
-public:
-    virtual ~MemoryHook();
-
-    virtual std::optional<bool> IsValidAddress(VAddr addr) = 0;
-
-    virtual std::optional<u8> Read8(VAddr addr) = 0;
-    virtual std::optional<u16> Read16(VAddr addr) = 0;
-    virtual std::optional<u32> Read32(VAddr addr) = 0;
-    virtual std::optional<u64> Read64(VAddr addr) = 0;
-
-    virtual bool ReadBlock(VAddr src_addr, void* dest_buffer, std::size_t size) = 0;
-
-    virtual bool Write8(VAddr addr, u8 data) = 0;
-    virtual bool Write16(VAddr addr, u16 data) = 0;
-    virtual bool Write32(VAddr addr, u32 data) = 0;
-    virtual bool Write64(VAddr addr, u64 data) = 0;
-
-    virtual bool WriteBlock(VAddr dest_addr, const void* src_buffer, std::size_t size) = 0;
-};
-
-using MemoryHookPointer = std::shared_ptr<MemoryHook>;
-} // namespace Common

src/common/multi_level_queue.h

@@ -1,345 +0,0 @@
-// Copyright 2019 TuxSH
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <array>
-#include <iterator>
-#include <list>
-#include <utility>
-
-#include "common/bit_util.h"
-#include "common/common_types.h"
-
-namespace Common {
-
-/**
- * A MultiLevelQueue is a type of priority queue which has the following characteristics:
- * - iteratable through each of its elements.
- * - back can be obtained.
- * - O(1) add, lookup (both front and back)
- * - discrete priorities and a max of 64 priorities (limited domain)
- * This type of priority queue is normaly used for managing threads within an scheduler
- */
-template <typename T, std::size_t Depth>
-class MultiLevelQueue {
-public:
-    using value_type = T;
-    using reference = value_type&;
-    using const_reference = const value_type&;
-    using pointer = value_type*;
-    using const_pointer = const value_type*;
-
-    using difference_type = typename std::pointer_traits<pointer>::difference_type;
-    using size_type = std::size_t;
-
-    template <bool is_constant>
-    class iterator_impl {
-    public:
-        using iterator_category = std::bidirectional_iterator_tag;
-        using value_type = T;
-        using pointer = std::conditional_t<is_constant, T*, const T*>;
-        using reference = std::conditional_t<is_constant, const T&, T&>;
-        using difference_type = typename std::pointer_traits<pointer>::difference_type;
-
-        friend bool operator==(const iterator_impl& lhs, const iterator_impl& rhs) {
-            if (lhs.IsEnd() && rhs.IsEnd())
-                return true;
-            return std::tie(lhs.current_priority, lhs.it) == std::tie(rhs.current_priority, rhs.it);
-        }
-
-        friend bool operator!=(const iterator_impl& lhs, const iterator_impl& rhs) {
-            return !operator==(lhs, rhs);
-        }
-
-        reference operator*() const {
-            return *it;
-        }
-
-        pointer operator->() const {
-            return it.operator->();
-        }
-
-        iterator_impl& operator++() {
-            if (IsEnd()) {
-                return *this;
-            }
-
-            ++it;
-
-            if (it == GetEndItForPrio()) {
-                u64 prios = mlq.used_priorities;
-                prios &= ~((1ULL << (current_priority + 1)) - 1);
-                if (prios == 0) {
-                    current_priority = static_cast<u32>(mlq.depth());
-                } else {
-                    current_priority = CountTrailingZeroes64(prios);
-                    it = GetBeginItForPrio();
-                }
-            }
-            return *this;
-        }
-
-        iterator_impl& operator--() {
-            if (IsEnd()) {
-                if (mlq.used_priorities != 0) {
-                    current_priority = 63 - CountLeadingZeroes64(mlq.used_priorities);
-                    it = GetEndItForPrio();
-                    --it;
-                }
-            } else if (it == GetBeginItForPrio()) {
-                u64 prios = mlq.used_priorities;
-                prios &= (1ULL << current_priority) - 1;
-                if (prios != 0) {
-                    current_priority = CountTrailingZeroes64(prios);
-                    it = GetEndItForPrio();
-                    --it;
-                }
-            } else {
-                --it;
-            }
-            return *this;
-        }
-
-        iterator_impl operator++(int) {
-            const iterator_impl v{*this};
-            ++(*this);
-            return v;
-        }
-
-        iterator_impl operator--(int) {
-            const iterator_impl v{*this};
-            --(*this);
-            return v;
-        }
-
-        // allow implicit const->non-const
-        iterator_impl(const iterator_impl<false>& other)
-            : mlq(other.mlq), it(other.it), current_priority(other.current_priority) {}
-
-        iterator_impl(const iterator_impl<true>& other)
-            : mlq(other.mlq), it(other.it), current_priority(other.current_priority) {}
-
-        iterator_impl& operator=(const iterator_impl<false>& other) {
-            mlq = other.mlq;
-            it = other.it;
-            current_priority = other.current_priority;
-            return *this;
-        }
-
-        friend class iterator_impl<true>;
-        iterator_impl() = default;
-
-    private:
-        friend class MultiLevelQueue;
-        using container_ref =
-            std::conditional_t<is_constant, const MultiLevelQueue&, MultiLevelQueue&>;
-        using list_iterator = std::conditional_t<is_constant, typename std::list<T>::const_iterator,
-                                                 typename std::list<T>::iterator>;
-
-        explicit iterator_impl(container_ref mlq, list_iterator it, u32 current_priority)
-            : mlq(mlq), it(it), current_priority(current_priority) {}
-        explicit iterator_impl(container_ref mlq, u32 current_priority)
-            : mlq(mlq), it(), current_priority(current_priority) {}
-
-        bool IsEnd() const {
-            return current_priority == mlq.depth();
-        }
-
-        list_iterator GetBeginItForPrio() const {
-            return mlq.levels[current_priority].begin();
-        }
-
-        list_iterator GetEndItForPrio() const {
-            return mlq.levels[current_priority].end();
-        }
-
-        container_ref mlq;
-        list_iterator it;
-        u32 current_priority;
-    };
-
-    using iterator = iterator_impl<false>;
-    using const_iterator = iterator_impl<true>;
-
-    void add(const T& element, u32 priority, bool send_back = true) {
-        if (send_back)
-            levels[priority].push_back(element);
-        else
-            levels[priority].push_front(element);
-        used_priorities |= 1ULL << priority;
-    }
-
-    void remove(const T& element, u32 priority) {
-        auto it = ListIterateTo(levels[priority], element);
-        if (it == levels[priority].end())
-            return;
-        levels[priority].erase(it);
-        if (levels[priority].empty()) {
-            used_priorities &= ~(1ULL << priority);
-        }
-    }
-
-    void adjust(const T& element, u32 old_priority, u32 new_priority, bool adjust_front = false) {
-        remove(element, old_priority);
-        add(element, new_priority, !adjust_front);
-    }
-    void adjust(const_iterator it, u32 old_priority, u32 new_priority, bool adjust_front = false) {
-        adjust(*it, old_priority, new_priority, adjust_front);
-    }
-
-    void transfer_to_front(const T& element, u32 priority, MultiLevelQueue& other) {
-        ListSplice(other.levels[priority], other.levels[priority].begin(), levels[priority],
-                   ListIterateTo(levels[priority], element));
-
-        other.used_priorities |= 1ULL << priority;
-
-        if (levels[priority].empty()) {
-            used_priorities &= ~(1ULL << priority);
-        }
-    }
-
-    void transfer_to_front(const_iterator it, u32 priority, MultiLevelQueue& other) {
-        transfer_to_front(*it, priority, other);
-    }
-
-    void transfer_to_back(const T& element, u32 priority, MultiLevelQueue& other) {
-        ListSplice(other.levels[priority], other.levels[priority].end(), levels[priority],
-                   ListIterateTo(levels[priority], element));
-
-        other.used_priorities |= 1ULL << priority;
-
-        if (levels[priority].empty()) {
-            used_priorities &= ~(1ULL << priority);
-        }
-    }
-
-    void transfer_to_back(const_iterator it, u32 priority, MultiLevelQueue& other) {
-        transfer_to_back(*it, priority, other);
-    }
-
-    void yield(u32 priority, std::size_t n = 1) {
-        ListShiftForward(levels[priority], n);
-    }
-
-    [[nodiscard]] std::size_t depth() const {
-        return Depth;
-    }
-
-    [[nodiscard]] std::size_t size(u32 priority) const {
-        return levels[priority].size();
-    }
-
-    [[nodiscard]] std::size_t size() const {
-        u64 priorities = used_priorities;
-        std::size_t size = 0;
-        while (priorities != 0) {
-            const u64 current_priority = CountTrailingZeroes64(priorities);
-            size += levels[current_priority].size();
-            priorities &= ~(1ULL << current_priority);
-        }
-        return size;
-    }
-
-    [[nodiscard]] bool empty() const {
-        return used_priorities == 0;
-    }
-
-    [[nodiscard]] bool empty(u32 priority) const {
-        return (used_priorities & (1ULL << priority)) == 0;
-    }
-
-    [[nodiscard]] u32 highest_priority_set(u32 max_priority = 0) const {
-        const u64 priorities =
-            max_priority == 0 ? used_priorities : (used_priorities & ~((1ULL << max_priority) - 1));
-        return priorities == 0 ? Depth : static_cast<u32>(CountTrailingZeroes64(priorities));
-    }
-
-    [[nodiscard]] u32 lowest_priority_set(u32 min_priority = Depth - 1) const {
-        const u64 priorities = min_priority >= Depth - 1
-                                   ? used_priorities
-                                   : (used_priorities & ((1ULL << (min_priority + 1)) - 1));
-        return priorities == 0 ? Depth : 63 - CountLeadingZeroes64(priorities);
-    }
-
-    [[nodiscard]] const_iterator cbegin(u32 max_prio = 0) const {
-        const u32 priority = highest_priority_set(max_prio);
-        return priority == Depth ? cend()
-                                 : const_iterator{*this, levels[priority].cbegin(), priority};
-    }
-    [[nodiscard]] const_iterator begin(u32 max_prio = 0) const {
-        return cbegin(max_prio);
-    }
-    [[nodiscard]] iterator begin(u32 max_prio = 0) {
-        const u32 priority = highest_priority_set(max_prio);
-        return priority == Depth ? end() : iterator{*this, levels[priority].begin(), priority};
-    }
-
-    [[nodiscard]] const_iterator cend(u32 min_prio = Depth - 1) const {
-        return min_prio == Depth - 1 ? const_iterator{*this, Depth} : cbegin(min_prio + 1);
-    }
-    [[nodiscard]] const_iterator end(u32 min_prio = Depth - 1) const {
-        return cend(min_prio);
-    }
-    [[nodiscard]] iterator end(u32 min_prio = Depth - 1) {
-        return min_prio == Depth - 1 ? iterator{*this, Depth} : begin(min_prio + 1);
-    }
-
-    [[nodiscard]] T& front(u32 max_priority = 0) {
-        const u32 priority = highest_priority_set(max_priority);
-        return levels[priority == Depth ? 0 : priority].front();
-    }
-    [[nodiscard]] const T& front(u32 max_priority = 0) const {
-        const u32 priority = highest_priority_set(max_priority);
-        return levels[priority == Depth ? 0 : priority].front();
-    }
-
-    [[nodiscard]] T& back(u32 min_priority = Depth - 1) {
-        const u32 priority = lowest_priority_set(min_priority); // intended
-        return levels[priority == Depth ? 63 : priority].back();
-    }
-    [[nodiscard]] const T& back(u32 min_priority = Depth - 1) const {
-        const u32 priority = lowest_priority_set(min_priority); // intended
-        return levels[priority == Depth ? 63 : priority].back();
-    }
-
-    void clear() {
-        used_priorities = 0;
-        for (std::size_t i = 0; i < Depth; i++) {
-            levels[i].clear();
-        }
-    }
-
-private:
-    using const_list_iterator = typename std::list<T>::const_iterator;
-
-    static void ListShiftForward(std::list<T>& list, const std::size_t shift = 1) {
-        if (shift >= list.size()) {
-            return;
-        }
-
-        const auto begin_range = list.begin();
-        const auto end_range = std::next(begin_range, shift);
-        list.splice(list.end(), list, begin_range, end_range);
-    }
-
-    static void ListSplice(std::list<T>& in_list, const_list_iterator position,
-                           std::list<T>& out_list, const_list_iterator element) {
-        in_list.splice(position, out_list, element);
-    }
-
-    [[nodiscard]] static const_list_iterator ListIterateTo(const std::list<T>& list,
-                                                           const T& element) {
-        auto it = list.cbegin();
-        while (it != list.cend() && *it != element) {
-            ++it;
-        }
-        return it;
-    }
-
-    std::array<std::list<T>, Depth> levels;
-    u64 used_priorities = 0;
-};
-
-} // namespace Common

src/common/page_table.cpp

@@ -10,16 +10,10 @@ PageTable::PageTable() = default;
 
 PageTable::~PageTable() noexcept = default;
 
-void PageTable::Resize(std::size_t address_space_width_in_bits, std::size_t page_size_in_bits,
-                       bool has_attribute) {
-    const std::size_t num_page_table_entries{1ULL
-                                             << (address_space_width_in_bits - page_size_in_bits)};
+void PageTable::Resize(size_t address_space_width_in_bits, size_t page_size_in_bits) {
+    const size_t num_page_table_entries{1ULL << (address_space_width_in_bits - page_size_in_bits)};
     pointers.resize(num_page_table_entries);
     backing_addr.resize(num_page_table_entries);
-
-    if (has_attribute) {
-        attributes.resize(num_page_table_entries);
-    }
 }
 
 } // namespace Common

src/common/page_table.h

@@ -4,10 +4,10 @@
 
 #pragma once
 
+#include <atomic>
 #include <tuple>
 
 #include "common/common_types.h"
-#include "common/memory_hook.h"
 #include "common/virtual_buffer.h"
 
 namespace Common {
@@ -20,27 +20,6 @@ enum class PageType : u8 {
     /// Page is mapped to regular memory, but also needs to check for rasterizer cache flushing and
     /// invalidation
     RasterizerCachedMemory,
-    /// Page is mapped to a I/O region. Writing and reading to this page is handled by functions.
-    Special,
-    /// Page is allocated for use.
-    Allocated,
-};
-
-struct SpecialRegion {
-    enum class Type {
-        DebugHook,
-        IODevice,
-    } type;
-
-    MemoryHookPointer handler;
-
-    [[nodiscard]] bool operator<(const SpecialRegion& other) const {
-        return std::tie(type, handler) < std::tie(other.type, other.handler);
-    }
-
-    [[nodiscard]] bool operator==(const SpecialRegion& other) const {
-        return std::tie(type, handler) == std::tie(other.type, other.handler);
-    }
 };
 
 /**
@@ -48,6 +27,59 @@ struct SpecialRegion {
  * mimics the way a real CPU page table works.
  */
 struct PageTable {
+    /// Number of bits reserved for attribute tagging.
+    /// This can be at most the guaranteed alignment of the pointers in the page table.
+    static constexpr int ATTRIBUTE_BITS = 2;
+
+    /**
+     * Pair of host pointer and page type attribute.
+     * This uses the lower bits of a given pointer to store the attribute tag.
+     * Writing and reading the pointer attribute pair is guaranteed to be atomic for the same method
+     * call. In other words, they are guaranteed to be synchronized at all times.
+     */
+    class PageInfo {
+    public:
+        /// Returns the page pointer
+        [[nodiscard]] u8* Pointer() const noexcept {
+            return ExtractPointer(raw.load(std::memory_order_relaxed));
+        }
+
+        /// Returns the page type attribute
+        [[nodiscard]] PageType Type() const noexcept {
+            return ExtractType(raw.load(std::memory_order_relaxed));
+        }
+
+        /// Returns the page pointer and attribute pair, extracted from the same atomic read
+        [[nodiscard]] std::pair<u8*, PageType> PointerType() const noexcept {
+            const uintptr_t non_atomic_raw = raw.load(std::memory_order_relaxed);
+            return {ExtractPointer(non_atomic_raw), ExtractType(non_atomic_raw)};
+        }
+
+        /// Returns the raw representation of the page information.
+        /// Use ExtractPointer and ExtractType to unpack the value.
+        [[nodiscard]] uintptr_t Raw() const noexcept {
+            return raw.load(std::memory_order_relaxed);
+        }
+
+        /// Write a page pointer and type pair atomically
+        void Store(u8* pointer, PageType type) noexcept {
+            raw.store(reinterpret_cast<uintptr_t>(pointer) | static_cast<uintptr_t>(type));
+        }
+
+        /// Unpack a pointer from a page info raw representation
+        [[nodiscard]] static u8* ExtractPointer(uintptr_t raw) noexcept {
+            return reinterpret_cast<u8*>(raw & (~uintptr_t{0} << ATTRIBUTE_BITS));
+        }
+
+        /// Unpack a page type from a page info raw representation
+        [[nodiscard]] static PageType ExtractType(uintptr_t raw) noexcept {
+            return static_cast<PageType>(raw & ((uintptr_t{1} << ATTRIBUTE_BITS) - 1));
+        }
+
+    private:
+        std::atomic<uintptr_t> raw;
+    };
+
     PageTable();
     ~PageTable() noexcept;
 
@@ -58,25 +90,21 @@ struct PageTable {
     PageTable& operator=(PageTable&&) noexcept = default;
 
     /**
-     * Resizes the page table to be able to accomodate enough pages within
+     * Resizes the page table to be able to accommodate enough pages within
      * a given address space.
      *
      * @param address_space_width_in_bits The address size width in bits.
      * @param page_size_in_bits           The page size in bits.
-     * @param has_attribute               Whether or not this page has any backing attributes.
      */
-    void Resize(std::size_t address_space_width_in_bits, std::size_t page_size_in_bits,
-                bool has_attribute);
+    void Resize(size_t address_space_width_in_bits, size_t page_size_in_bits);
 
     /**
      * Vector of memory pointers backing each page. An entry can only be non-null if the
-     * corresponding entry in the `attributes` vector is of type `Memory`.
+     * corresponding attribute element is of type `Memory`.
      */
-    VirtualBuffer<u8*> pointers;
+    VirtualBuffer<PageInfo> pointers;
 
     VirtualBuffer<u64> backing_addr;
-
-    VirtualBuffer<PageType> attributes;
 };
 
 } // namespace Common

src/common/parent_of_member.h

@@ -0,0 +1,191 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <type_traits>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+
+namespace Common {
+namespace detail {
+template <typename T, size_t Size, size_t Align>
+struct TypedStorageImpl {
+    std::aligned_storage_t<Size, Align> storage_;
+};
+} // namespace detail
+
+template <typename T>
+using TypedStorage = detail::TypedStorageImpl<T, sizeof(T), alignof(T)>;
+
+template <typename T>
+static constexpr T* GetPointer(TypedStorage<T>& ts) {
+    return static_cast<T*>(static_cast<void*>(std::addressof(ts.storage_)));
+}
+
+template <typename T>
+static constexpr const T* GetPointer(const TypedStorage<T>& ts) {
+    return static_cast<const T*>(static_cast<const void*>(std::addressof(ts.storage_)));
+}
+
+namespace impl {
+
+template <size_t MaxDepth>
+struct OffsetOfUnionHolder {
+    template <typename ParentType, typename MemberType, size_t Offset>
+    union UnionImpl {
+        using PaddingMember = char;
+        static constexpr size_t GetOffset() {
+            return Offset;
+        }
+
+#pragma pack(push, 1)
+        struct {
+            PaddingMember padding[Offset];
+            MemberType members[(sizeof(ParentType) / sizeof(MemberType)) + 1];
+        } data;
+#pragma pack(pop)
+        UnionImpl<ParentType, MemberType, Offset + 1> next_union;
+    };
+
+    template <typename ParentType, typename MemberType>
+    union UnionImpl<ParentType, MemberType, 0> {
+        static constexpr size_t GetOffset() {
+            return 0;
+        }
+
+        struct {
+            MemberType members[(sizeof(ParentType) / sizeof(MemberType)) + 1];
+        } data;
+        UnionImpl<ParentType, MemberType, 1> next_union;
+    };
+
+    template <typename ParentType, typename MemberType>
+    union UnionImpl<ParentType, MemberType, MaxDepth> {};
+};
+
+template <typename ParentType, typename MemberType>
+struct OffsetOfCalculator {
+    using UnionHolder =
+        typename OffsetOfUnionHolder<sizeof(MemberType)>::template UnionImpl<ParentType, MemberType,
+                                                                             0>;
+    union Union {
+        char c{};
+        UnionHolder first_union;
+        TypedStorage<ParentType> parent;
+
+        constexpr Union() : c() {}
+    };
+    static constexpr Union U = {};
+
+    static constexpr const MemberType* GetNextAddress(const MemberType* start,
+                                                      const MemberType* target) {
+        while (start < target) {
+            start++;
+        }
+        return start;
+    }
+
+    static constexpr std::ptrdiff_t GetDifference(const MemberType* start,
+                                                  const MemberType* target) {
+        return (target - start) * sizeof(MemberType);
+    }
+
+    template <typename CurUnion>
+    static constexpr std::ptrdiff_t OffsetOfImpl(MemberType ParentType::*member,
+                                                 CurUnion& cur_union) {
+        constexpr size_t Offset = CurUnion::GetOffset();
+        const auto target = std::addressof(GetPointer(U.parent)->*member);
+        const auto start = std::addressof(cur_union.data.members[0]);
+        const auto next = GetNextAddress(start, target);
+
+        if (next != target) {
+            if constexpr (Offset < sizeof(MemberType) - 1) {
+                return OffsetOfImpl(member, cur_union.next_union);
+            } else {
+                UNREACHABLE();
+            }
+        }
+
+        return (next - start) * sizeof(MemberType) + Offset;
+    }
+
+    static constexpr std::ptrdiff_t OffsetOf(MemberType ParentType::*member) {
+        return OffsetOfImpl(member, U.first_union);
+    }
+};
+
+template <typename T>
+struct GetMemberPointerTraits;
+
+template <typename P, typename M>
+struct GetMemberPointerTraits<M P::*> {
+    using Parent = P;
+    using Member = M;
+};
+
+template <auto MemberPtr>
+using GetParentType = typename GetMemberPointerTraits<decltype(MemberPtr)>::Parent;
+
+template <auto MemberPtr>
+using GetMemberType = typename GetMemberPointerTraits<decltype(MemberPtr)>::Member;
+
+template <auto MemberPtr, typename RealParentType = GetParentType<MemberPtr>>
+static inline std::ptrdiff_t OffsetOf = [] {
+    using DeducedParentType = GetParentType<MemberPtr>;
+    using MemberType = GetMemberType<MemberPtr>;
+    static_assert(std::is_base_of<DeducedParentType, RealParentType>::value ||
+                  std::is_same<RealParentType, DeducedParentType>::value);
+
+    return OffsetOfCalculator<RealParentType, MemberType>::OffsetOf(MemberPtr);
+}();
+
+} // namespace impl
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType& GetParentReference(impl::GetMemberType<MemberPtr>* member) {
+    std::ptrdiff_t Offset = impl::OffsetOf<MemberPtr, RealParentType>;
+    return *static_cast<RealParentType*>(
+        static_cast<void*>(static_cast<uint8_t*>(static_cast<void*>(member)) - Offset));
+}
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType const& GetParentReference(impl::GetMemberType<MemberPtr> const* member) {
+    std::ptrdiff_t Offset = impl::OffsetOf<MemberPtr, RealParentType>;
+    return *static_cast<const RealParentType*>(static_cast<const void*>(
+        static_cast<const uint8_t*>(static_cast<const void*>(member)) - Offset));
+}
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType* GetParentPointer(impl::GetMemberType<MemberPtr>* member) {
+    return std::addressof(GetParentReference<MemberPtr, RealParentType>(member));
+}
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType const* GetParentPointer(impl::GetMemberType<MemberPtr> const* member) {
+    return std::addressof(GetParentReference<MemberPtr, RealParentType>(member));
+}
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType& GetParentReference(impl::GetMemberType<MemberPtr>& member) {
+    return GetParentReference<MemberPtr, RealParentType>(std::addressof(member));
+}
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType const& GetParentReference(impl::GetMemberType<MemberPtr> const& member) {
+    return GetParentReference<MemberPtr, RealParentType>(std::addressof(member));
+}
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType* GetParentPointer(impl::GetMemberType<MemberPtr>& member) {
+    return std::addressof(GetParentReference<MemberPtr, RealParentType>(member));
+}
+
+template <auto MemberPtr, typename RealParentType = impl::GetParentType<MemberPtr>>
+constexpr RealParentType const* GetParentPointer(impl::GetMemberType<MemberPtr> const& member) {
+    return std::addressof(GetParentReference<MemberPtr, RealParentType>(member));
+}
+
+} // namespace Common

src/common/swap.h

@@ -394,7 +394,7 @@ public:
     template <typename S, typename T2, typename F2>
     friend S operator%(const S& p, const swapped_t v);
 
-    // Arithmetics + assignements
+    // Arithmetics + assignments
     template <typename S, typename T2, typename F2>
     friend S operator+=(const S& p, const swapped_t v);
 
@@ -451,7 +451,7 @@ S operator%(const S& i, const swap_struct_t<T, F> v) {
     return i % v.swap();
 }
 
-// Arithmetics + assignements
+// Arithmetics + assignments
 template <typename S, typename T, typename F>
 S& operator+=(S& i, const swap_struct_t<T, F> v) {
     i += v.swap();

src/common/thread_worker.cpp

@@ -0,0 +1,58 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/thread.h"
+#include "common/thread_worker.h"
+
+namespace Common {
+
+ThreadWorker::ThreadWorker(std::size_t num_workers, const std::string& name) {
+    for (std::size_t i = 0; i < num_workers; ++i)
+        threads.emplace_back([this, thread_name{std::string{name}}] {
+            Common::SetCurrentThreadName(thread_name.c_str());
+
+            // Wait for first request
+            {
+                std::unique_lock lock{queue_mutex};
+                condition.wait(lock, [this] { return stop || !requests.empty(); });
+            }
+
+            while (true) {
+                std::function<void()> task;
+
+                {
+                    std::unique_lock lock{queue_mutex};
+                    condition.wait(lock, [this] { return stop || !requests.empty(); });
+                    if (stop || requests.empty()) {
+                        return;
+                    }
+                    task = std::move(requests.front());
+                    requests.pop();
+                }
+
+                task();
+            }
+        });
+}
+
+ThreadWorker::~ThreadWorker() {
+    {
+        std::unique_lock lock{queue_mutex};
+        stop = true;
+    }
+    condition.notify_all();
+    for (std::thread& thread : threads) {
+        thread.join();
+    }
+}
+
+void ThreadWorker::QueueWork(std::function<void()>&& work) {
+    {
+        std::unique_lock lock{queue_mutex};
+        requests.emplace(work);
+    }
+    condition.notify_one();
+}
+
+} // namespace Common

src/common/thread_worker.h

@@ -0,0 +1,30 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <atomic>
+#include <functional>
+#include <mutex>
+#include <string>
+#include <vector>
+#include <queue>
+
+namespace Common {
+
+class ThreadWorker final {
+public:
+    explicit ThreadWorker(std::size_t num_workers, const std::string& name);
+    ~ThreadWorker();
+    void QueueWork(std::function<void()>&& work);
+
+private:
+    std::vector<std::thread> threads;
+    std::queue<std::function<void()>> requests;
+    std::mutex queue_mutex;
+    std::condition_variable condition;
+    std::atomic_bool stop{};
+};
+
+} // namespace Common

src/common/tree.h

@@ -0,0 +1,822 @@
+/* $NetBSD: tree.h,v 1.8 2004/03/28 19:38:30 provos Exp $ */
+/* $OpenBSD: tree.h,v 1.7 2002/10/17 21:51:54 art Exp $ */
+/* $FreeBSD$ */
+
+/*-
+ * Copyright 2002 Niels Provos <provos@citi.umich.edu>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SYS_TREE_H_
+#define _SYS_TREE_H_
+
+/* FreeBSD <sys/cdefs.h> has a lot of defines we don't really want. */
+/* tree.h only actually uses __inline and __unused, so we'll just define those. */
+
+/* #include <sys/cdefs.h> */
+
+#ifndef __inline
+#define __inline inline
+#endif
+
+/*
+ * This file defines data structures for different types of trees:
+ * splay trees and red-black trees.
+ *
+ * A splay tree is a self-organizing data structure.  Every operation
+ * on the tree causes a splay to happen.  The splay moves the requested
+ * node to the root of the tree and partly rebalances it.
+ *
+ * This has the benefit that request locality causes faster lookups as
+ * the requested nodes move to the top of the tree.  On the other hand,
+ * every lookup causes memory writes.
+ *
+ * The Balance Theorem bounds the total access time for m operations
+ * and n inserts on an initially empty tree as O((m + n)lg n).  The
+ * amortized cost for a sequence of m accesses to a splay tree is O(lg n);
+ *
+ * A red-black tree is a binary search tree with the node color as an
+ * extra attribute.  It fulfills a set of conditions:
+ * - every search path from the root to a leaf consists of the
+ *   same number of black nodes,
+ * - each red node (except for the root) has a black parent,
+ * - each leaf node is black.
+ *
+ * Every operation on a red-black tree is bounded as O(lg n).
+ * The maximum height of a red-black tree is 2lg (n+1).
+ */
+
+#define SPLAY_HEAD(name, type)                                                                     \
+    struct name {                                                                                  \
+        struct type* sph_root; /* root of the tree */                                              \
+    }
+
+#define SPLAY_INITIALIZER(root)                                                                    \
+    { NULL }
+
+#define SPLAY_INIT(root)                                                                           \
+    do {                                                                                           \
+        (root)->sph_root = NULL;                                                                   \
+    } while (/*CONSTCOND*/ 0)
+
+#define SPLAY_ENTRY(type)                                                                          \
+    struct {                                                                                       \
+        struct type* spe_left;  /* left element */                                                 \
+        struct type* spe_right; /* right element */                                                \
+    }
+
+#define SPLAY_LEFT(elm, field) (elm)->field.spe_left
+#define SPLAY_RIGHT(elm, field) (elm)->field.spe_right
+#define SPLAY_ROOT(head) (head)->sph_root
+#define SPLAY_EMPTY(head) (SPLAY_ROOT(head) == NULL)
+
+/* SPLAY_ROTATE_{LEFT,RIGHT} expect that tmp hold SPLAY_{RIGHT,LEFT} */
+#define SPLAY_ROTATE_RIGHT(head, tmp, field)                                                       \
+    do {                                                                                           \
+        SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(tmp, field);                             \
+        SPLAY_RIGHT(tmp, field) = (head)->sph_root;                                                \
+        (head)->sph_root = tmp;                                                                    \
+    } while (/*CONSTCOND*/ 0)
+
+#define SPLAY_ROTATE_LEFT(head, tmp, field)                                                        \
+    do {                                                                                           \
+        SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(tmp, field);                             \
+        SPLAY_LEFT(tmp, field) = (head)->sph_root;                                                 \
+        (head)->sph_root = tmp;                                                                    \
+    } while (/*CONSTCOND*/ 0)
+
+#define SPLAY_LINKLEFT(head, tmp, field)                                                           \
+    do {                                                                                           \
+        SPLAY_LEFT(tmp, field) = (head)->sph_root;                                                 \
+        tmp = (head)->sph_root;                                                                    \
+        (head)->sph_root = SPLAY_LEFT((head)->sph_root, field);                                    \
+    } while (/*CONSTCOND*/ 0)
+
+#define SPLAY_LINKRIGHT(head, tmp, field)                                                          \
+    do {                                                                                           \
+        SPLAY_RIGHT(tmp, field) = (head)->sph_root;                                                \
+        tmp = (head)->sph_root;                                                                    \
+        (head)->sph_root = SPLAY_RIGHT((head)->sph_root, field);                                   \
+    } while (/*CONSTCOND*/ 0)
+
+#define SPLAY_ASSEMBLE(head, node, left, right, field)                                             \
+    do {                                                                                           \
+        SPLAY_RIGHT(left, field) = SPLAY_LEFT((head)->sph_root, field);                            \
+        SPLAY_LEFT(right, field) = SPLAY_RIGHT((head)->sph_root, field);                           \
+        SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(node, field);                            \
+        SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(node, field);                            \
+    } while (/*CONSTCOND*/ 0)
+
+/* Generates prototypes and inline functions */
+
+#define SPLAY_PROTOTYPE(name, type, field, cmp)                                                    \
+    void name##_SPLAY(struct name*, struct type*);                                                 \
+    void name##_SPLAY_MINMAX(struct name*, int);                                                   \
+    struct type* name##_SPLAY_INSERT(struct name*, struct type*);                                  \
+    struct type* name##_SPLAY_REMOVE(struct name*, struct type*);                                  \
+                                                                                                   \
+    /* Finds the node with the same key as elm */                                                  \
+    static __inline struct type* name##_SPLAY_FIND(struct name* head, struct type* elm) {          \
+        if (SPLAY_EMPTY(head))                                                                     \
+            return (NULL);                                                                         \
+        name##_SPLAY(head, elm);                                                                   \
+        if ((cmp)(elm, (head)->sph_root) == 0)                                                     \
+            return (head->sph_root);                                                               \
+        return (NULL);                                                                             \
+    }                                                                                              \
+                                                                                                   \
+    static __inline struct type* name##_SPLAY_NEXT(struct name* head, struct type* elm) {          \
+        name##_SPLAY(head, elm);                                                                   \
+        if (SPLAY_RIGHT(elm, field) != NULL) {                                                     \
+            elm = SPLAY_RIGHT(elm, field);                                                         \
+            while (SPLAY_LEFT(elm, field) != NULL) {                                               \
+                elm = SPLAY_LEFT(elm, field);                                                      \
+            }                                                                                      \
+        } else                                                                                     \
+            elm = NULL;                                                                            \
+        return (elm);                                                                              \
+    }                                                                                              \
+                                                                                                   \
+    static __inline struct type* name##_SPLAY_MIN_MAX(struct name* head, int val) {                \
+        name##_SPLAY_MINMAX(head, val);                                                            \
+        return (SPLAY_ROOT(head));                                                                 \
+    }
+
+/* Main splay operation.
+ * Moves node close to the key of elm to top
+ */
+#define SPLAY_GENERATE(name, type, field, cmp)                                                     \
+    struct type* name##_SPLAY_INSERT(struct name* head, struct type* elm) {                        \
+        if (SPLAY_EMPTY(head)) {                                                                   \
+            SPLAY_LEFT(elm, field) = SPLAY_RIGHT(elm, field) = NULL;                               \
+        } else {                                                                                   \
+            int __comp;                                                                            \
+            name##_SPLAY(head, elm);                                                               \
+            __comp = (cmp)(elm, (head)->sph_root);                                                 \
+            if (__comp < 0) {                                                                      \
+                SPLAY_LEFT(elm, field) = SPLAY_LEFT((head)->sph_root, field);                      \
+                SPLAY_RIGHT(elm, field) = (head)->sph_root;                                        \
+                SPLAY_LEFT((head)->sph_root, field) = NULL;                                        \
+            } else if (__comp > 0) {                                                               \
+                SPLAY_RIGHT(elm, field) = SPLAY_RIGHT((head)->sph_root, field);                    \
+                SPLAY_LEFT(elm, field) = (head)->sph_root;                                         \
+                SPLAY_RIGHT((head)->sph_root, field) = NULL;                                       \
+            } else                                                                                 \
+                return ((head)->sph_root);                                                         \
+        }                                                                                          \
+        (head)->sph_root = (elm);                                                                  \
+        return (NULL);                                                                             \
+    }                                                                                              \
+                                                                                                   \
+    struct type* name##_SPLAY_REMOVE(struct name* head, struct type* elm) {                        \
+        struct type* __tmp;                                                                        \
+        if (SPLAY_EMPTY(head))                                                                     \
+            return (NULL);                                                                         \
+        name##_SPLAY(head, elm);                                                                   \
+        if ((cmp)(elm, (head)->sph_root) == 0) {                                                   \
+            if (SPLAY_LEFT((head)->sph_root, field) == NULL) {                                     \
+                (head)->sph_root = SPLAY_RIGHT((head)->sph_root, field);                           \
+            } else {                                                                               \
+                __tmp = SPLAY_RIGHT((head)->sph_root, field);                                      \
+                (head)->sph_root = SPLAY_LEFT((head)->sph_root, field);                            \
+                name##_SPLAY(head, elm);                                                           \
+                SPLAY_RIGHT((head)->sph_root, field) = __tmp;                                      \
+            }                                                                                      \
+            return (elm);                                                                          \
+        }                                                                                          \
+        return (NULL);                                                                             \
+    }                                                                                              \
+                                                                                                   \
+    void name##_SPLAY(struct name* head, struct type* elm) {                                       \
+        struct type __node, *__left, *__right, *__tmp;                                             \
+        int __comp;                                                                                \
+                                                                                                   \
+        SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL;                           \
+        __left = __right = &__node;                                                                \
+                                                                                                   \
+        while ((__comp = (cmp)(elm, (head)->sph_root)) != 0) {                                     \
+            if (__comp < 0) {                                                                      \
+                __tmp = SPLAY_LEFT((head)->sph_root, field);                                       \
+                if (__tmp == NULL)                                                                 \
+                    break;                                                                         \
+                if ((cmp)(elm, __tmp) < 0) {                                                       \
+                    SPLAY_ROTATE_RIGHT(head, __tmp, field);                                        \
+                    if (SPLAY_LEFT((head)->sph_root, field) == NULL)                               \
+                        break;                                                                     \
+                }                                                                                  \
+                SPLAY_LINKLEFT(head, __right, field);                                              \
+            } else if (__comp > 0) {                                                               \
+                __tmp = SPLAY_RIGHT((head)->sph_root, field);                                      \
+                if (__tmp == NULL)                                                                 \
+                    break;                                                                         \
+                if ((cmp)(elm, __tmp) > 0) {                                                       \
+                    SPLAY_ROTATE_LEFT(head, __tmp, field);                                         \
+                    if (SPLAY_RIGHT((head)->sph_root, field) == NULL)                              \
+                        break;                                                                     \
+                }                                                                                  \
+                SPLAY_LINKRIGHT(head, __left, field);                                              \
+            }                                                                                      \
+        }                                                                                          \
+        SPLAY_ASSEMBLE(head, &__node, __left, __right, field);                                     \
+    }                                                                                              \
+                                                                                                   \
+    /* Splay with either the minimum or the maximum element                                        \
+     * Used to find minimum or maximum element in tree.                                            \
+     */                                                                                            \
+    void name##_SPLAY_MINMAX(struct name* head, int __comp) {                                      \
+        struct type __node, *__left, *__right, *__tmp;                                             \
+                                                                                                   \
+        SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL;                           \
+        __left = __right = &__node;                                                                \
+                                                                                                   \
+        while (1) {                                                                                \
+            if (__comp < 0) {                                                                      \
+                __tmp = SPLAY_LEFT((head)->sph_root, field);                                       \
+                if (__tmp == NULL)                                                                 \
+                    break;                                                                         \
+                if (__comp < 0) {                                                                  \
+                    SPLAY_ROTATE_RIGHT(head, __tmp, field);                                        \
+                    if (SPLAY_LEFT((head)->sph_root, field) == NULL)                               \
+                        break;                                                                     \
+                }                                                                                  \
+                SPLAY_LINKLEFT(head, __right, field);                                              \
+            } else if (__comp > 0) {                                                               \
+                __tmp = SPLAY_RIGHT((head)->sph_root, field);                                      \
+                if (__tmp == NULL)                                                                 \
+                    break;                                                                         \
+                if (__comp > 0) {                                                                  \
+                    SPLAY_ROTATE_LEFT(head, __tmp, field);                                         \
+                    if (SPLAY_RIGHT((head)->sph_root, field) == NULL)                              \
+                        break;                                                                     \
+                }                                                                                  \
+                SPLAY_LINKRIGHT(head, __left, field);                                              \
+            }                                                                                      \
+        }                                                                                          \
+        SPLAY_ASSEMBLE(head, &__node, __left, __right, field);                                     \
+    }
+
+#define SPLAY_NEGINF -1
+#define SPLAY_INF 1
+
+#define SPLAY_INSERT(name, x, y) name##_SPLAY_INSERT(x, y)
+#define SPLAY_REMOVE(name, x, y) name##_SPLAY_REMOVE(x, y)
+#define SPLAY_FIND(name, x, y) name##_SPLAY_FIND(x, y)
+#define SPLAY_NEXT(name, x, y) name##_SPLAY_NEXT(x, y)
+#define SPLAY_MIN(name, x) (SPLAY_EMPTY(x) ? NULL : name##_SPLAY_MIN_MAX(x, SPLAY_NEGINF))
+#define SPLAY_MAX(name, x) (SPLAY_EMPTY(x) ? NULL : name##_SPLAY_MIN_MAX(x, SPLAY_INF))
+
+#define SPLAY_FOREACH(x, name, head)                                                               \
+    for ((x) = SPLAY_MIN(name, head); (x) != NULL; (x) = SPLAY_NEXT(name, head, x))
+
+/* Macros that define a red-black tree */
+#define RB_HEAD(name, type)                                                                        \
+    struct name {                                                                                  \
+        struct type* rbh_root; /* root of the tree */                                              \
+    }
+
+#define RB_INITIALIZER(root)                                                                       \
+    { NULL }
+
+#define RB_INIT(root)                                                                              \
+    do {                                                                                           \
+        (root)->rbh_root = NULL;                                                                   \
+    } while (/*CONSTCOND*/ 0)
+
+#define RB_BLACK 0
+#define RB_RED 1
+#define RB_ENTRY(type)                                                                             \
+    struct {                                                                                       \
+        struct type* rbe_left;   /* left element */                                                \
+        struct type* rbe_right;  /* right element */                                               \
+        struct type* rbe_parent; /* parent element */                                              \
+        int rbe_color;           /* node color */                                                  \
+    }
+
+#define RB_LEFT(elm, field) (elm)->field.rbe_left
+#define RB_RIGHT(elm, field) (elm)->field.rbe_right
+#define RB_PARENT(elm, field) (elm)->field.rbe_parent
+#define RB_COLOR(elm, field) (elm)->field.rbe_color
+#define RB_ROOT(head) (head)->rbh_root
+#define RB_EMPTY(head) (RB_ROOT(head) == NULL)
+
+#define RB_SET(elm, parent, field)                                                                 \
+    do {                                                                                           \
+        RB_PARENT(elm, field) = parent;                                                            \
+        RB_LEFT(elm, field) = RB_RIGHT(elm, field) = NULL;                                         \
+        RB_COLOR(elm, field) = RB_RED;                                                             \
+    } while (/*CONSTCOND*/ 0)
+
+#define RB_SET_BLACKRED(black, red, field)                                                         \
+    do {                                                                                           \
+        RB_COLOR(black, field) = RB_BLACK;                                                         \
+        RB_COLOR(red, field) = RB_RED;                                                             \
+    } while (/*CONSTCOND*/ 0)
+
+#ifndef RB_AUGMENT
+#define RB_AUGMENT(x)                                                                              \
+    do {                                                                                           \
+    } while (0)
+#endif
+
+#define RB_ROTATE_LEFT(head, elm, tmp, field)                                                      \
+    do {                                                                                           \
+        (tmp) = RB_RIGHT(elm, field);                                                              \
+        if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field)) != NULL) {                                \
+            RB_PARENT(RB_LEFT(tmp, field), field) = (elm);                                         \
+        }                                                                                          \
+        RB_AUGMENT(elm);                                                                           \
+        if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) {                             \
+            if ((elm) == RB_LEFT(RB_PARENT(elm, field), field))                                    \
+                RB_LEFT(RB_PARENT(elm, field), field) = (tmp);                                     \
+            else                                                                                   \
+                RB_RIGHT(RB_PARENT(elm, field), field) = (tmp);                                    \
+        } else                                                                                     \
+            (head)->rbh_root = (tmp);                                                              \
+        RB_LEFT(tmp, field) = (elm);                                                               \
+        RB_PARENT(elm, field) = (tmp);                                                             \
+        RB_AUGMENT(tmp);                                                                           \
+        if ((RB_PARENT(tmp, field)))                                                               \
+            RB_AUGMENT(RB_PARENT(tmp, field));                                                     \
+    } while (/*CONSTCOND*/ 0)
+
+#define RB_ROTATE_RIGHT(head, elm, tmp, field)                                                     \
+    do {                                                                                           \
+        (tmp) = RB_LEFT(elm, field);                                                               \
+        if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field)) != NULL) {                                \
+            RB_PARENT(RB_RIGHT(tmp, field), field) = (elm);                                        \
+        }                                                                                          \
+        RB_AUGMENT(elm);                                                                           \
+        if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) {                             \
+            if ((elm) == RB_LEFT(RB_PARENT(elm, field), field))                                    \
+                RB_LEFT(RB_PARENT(elm, field), field) = (tmp);                                     \
+            else                                                                                   \
+                RB_RIGHT(RB_PARENT(elm, field), field) = (tmp);                                    \
+        } else                                                                                     \
+            (head)->rbh_root = (tmp);                                                              \
+        RB_RIGHT(tmp, field) = (elm);                                                              \
+        RB_PARENT(elm, field) = (tmp);                                                             \
+        RB_AUGMENT(tmp);                                                                           \
+        if ((RB_PARENT(tmp, field)))                                                               \
+            RB_AUGMENT(RB_PARENT(tmp, field));                                                     \
+    } while (/*CONSTCOND*/ 0)
+
+/* Generates prototypes and inline functions */
+#define RB_PROTOTYPE(name, type, field, cmp) RB_PROTOTYPE_INTERNAL(name, type, field, cmp, )
+#define RB_PROTOTYPE_STATIC(name, type, field, cmp)                                                \
+    RB_PROTOTYPE_INTERNAL(name, type, field, cmp, static)
+#define RB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr)                                        \
+    RB_PROTOTYPE_INSERT_COLOR(name, type, attr);                                                   \
+    RB_PROTOTYPE_REMOVE_COLOR(name, type, attr);                                                   \
+    RB_PROTOTYPE_INSERT(name, type, attr);                                                         \
+    RB_PROTOTYPE_REMOVE(name, type, attr);                                                         \
+    RB_PROTOTYPE_FIND(name, type, attr);                                                           \
+    RB_PROTOTYPE_NFIND(name, type, attr);                                                          \
+    RB_PROTOTYPE_FIND_LIGHT(name, type, attr);                                                     \
+    RB_PROTOTYPE_NFIND_LIGHT(name, type, attr);                                                    \
+    RB_PROTOTYPE_NEXT(name, type, attr);                                                           \
+    RB_PROTOTYPE_PREV(name, type, attr);                                                           \
+    RB_PROTOTYPE_MINMAX(name, type, attr);
+#define RB_PROTOTYPE_INSERT_COLOR(name, type, attr)                                                \
+    attr void name##_RB_INSERT_COLOR(struct name*, struct type*)
+#define RB_PROTOTYPE_REMOVE_COLOR(name, type, attr)                                                \
+    attr void name##_RB_REMOVE_COLOR(struct name*, struct type*, struct type*)
+#define RB_PROTOTYPE_REMOVE(name, type, attr)                                                      \
+    attr struct type* name##_RB_REMOVE(struct name*, struct type*)
+#define RB_PROTOTYPE_INSERT(name, type, attr)                                                      \
+    attr struct type* name##_RB_INSERT(struct name*, struct type*)
+#define RB_PROTOTYPE_FIND(name, type, attr)                                                        \
+    attr struct type* name##_RB_FIND(struct name*, struct type*)
+#define RB_PROTOTYPE_NFIND(name, type, attr)                                                       \
+    attr struct type* name##_RB_NFIND(struct name*, struct type*)
+#define RB_PROTOTYPE_FIND_LIGHT(name, type, attr)                                                  \
+    attr struct type* name##_RB_FIND_LIGHT(struct name*, const void*)
+#define RB_PROTOTYPE_NFIND_LIGHT(name, type, attr)                                                 \
+    attr struct type* name##_RB_NFIND_LIGHT(struct name*, const void*)
+#define RB_PROTOTYPE_NEXT(name, type, attr) attr struct type* name##_RB_NEXT(struct type*)
+#define RB_PROTOTYPE_PREV(name, type, attr) attr struct type* name##_RB_PREV(struct type*)
+#define RB_PROTOTYPE_MINMAX(name, type, attr) attr struct type* name##_RB_MINMAX(struct name*, int)
+
+/* Main rb operation.
+ * Moves node close to the key of elm to top
+ */
+#define RB_GENERATE_WITHOUT_COMPARE(name, type, field)                                             \
+    RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, )
+#define RB_GENERATE_WITHOUT_COMPARE_STATIC(name, type, field)                                      \
+    RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, static)
+#define RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, attr)                              \
+    RB_GENERATE_REMOVE_COLOR(name, type, field, attr)                                              \
+    RB_GENERATE_REMOVE(name, type, field, attr)                                                    \
+    RB_GENERATE_NEXT(name, type, field, attr)                                                      \
+    RB_GENERATE_PREV(name, type, field, attr)                                                      \
+    RB_GENERATE_MINMAX(name, type, field, attr)
+
+#define RB_GENERATE_WITH_COMPARE(name, type, field, cmp, lcmp)                                     \
+    RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, )
+#define RB_GENERATE_WITH_COMPARE_STATIC(name, type, field, cmp, lcmp)                              \
+    RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, static)
+#define RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, attr)                      \
+    RB_GENERATE_INSERT_COLOR(name, type, field, attr)                                              \
+    RB_GENERATE_INSERT(name, type, field, cmp, attr)                                               \
+    RB_GENERATE_FIND(name, type, field, cmp, attr)                                                 \
+    RB_GENERATE_NFIND(name, type, field, cmp, attr)                                                \
+    RB_GENERATE_FIND_LIGHT(name, type, field, lcmp, attr)                                          \
+    RB_GENERATE_NFIND_LIGHT(name, type, field, lcmp, attr)
+
+#define RB_GENERATE_ALL(name, type, field, cmp) RB_GENERATE_ALL_INTERNAL(name, type, field, cmp, )
+#define RB_GENERATE_ALL_STATIC(name, type, field, cmp)                                             \
+    RB_GENERATE_ALL_INTERNAL(name, type, field, cmp, static)
+#define RB_GENERATE_ALL_INTERNAL(name, type, field, cmp, attr)                                     \
+    RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, attr)                                  \
+    RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, attr)
+
+#define RB_GENERATE_INSERT_COLOR(name, type, field, attr)                                          \
+    attr void name##_RB_INSERT_COLOR(struct name* head, struct type* elm) {                        \
+        struct type *parent, *gparent, *tmp;                                                       \
+        while ((parent = RB_PARENT(elm, field)) != NULL && RB_COLOR(parent, field) == RB_RED) {    \
+            gparent = RB_PARENT(parent, field);                                                    \
+            if (parent == RB_LEFT(gparent, field)) {                                               \
+                tmp = RB_RIGHT(gparent, field);                                                    \
+                if (tmp && RB_COLOR(tmp, field) == RB_RED) {                                       \
+                    RB_COLOR(tmp, field) = RB_BLACK;                                               \
+                    RB_SET_BLACKRED(parent, gparent, field);                                       \
+                    elm = gparent;                                                                 \
+                    continue;                                                                      \
+                }                                                                                  \
+                if (RB_RIGHT(parent, field) == elm) {                                              \
+                    RB_ROTATE_LEFT(head, parent, tmp, field);                                      \
+                    tmp = parent;                                                                  \
+                    parent = elm;                                                                  \
+                    elm = tmp;                                                                     \
+                }                                                                                  \
+                RB_SET_BLACKRED(parent, gparent, field);                                           \
+                RB_ROTATE_RIGHT(head, gparent, tmp, field);                                        \
+            } else {                                                                               \
+                tmp = RB_LEFT(gparent, field);                                                     \
+                if (tmp && RB_COLOR(tmp, field) == RB_RED) {                                       \
+                    RB_COLOR(tmp, field) = RB_BLACK;                                               \
+                    RB_SET_BLACKRED(parent, gparent, field);                                       \
+                    elm = gparent;                                                                 \
+                    continue;                                                                      \
+                }                                                                                  \
+                if (RB_LEFT(parent, field) == elm) {                                               \
+                    RB_ROTATE_RIGHT(head, parent, tmp, field);                                     \
+                    tmp = parent;                                                                  \
+                    parent = elm;                                                                  \
+                    elm = tmp;                                                                     \
+                }                                                                                  \
+                RB_SET_BLACKRED(parent, gparent, field);                                           \
+                RB_ROTATE_LEFT(head, gparent, tmp, field);                                         \
+            }                                                                                      \
+        }                                                                                          \
+        RB_COLOR(head->rbh_root, field) = RB_BLACK;                                                \
+    }
+
+#define RB_GENERATE_REMOVE_COLOR(name, type, field, attr)                                          \
+    attr void name##_RB_REMOVE_COLOR(struct name* head, struct type* parent, struct type* elm) {   \
+        struct type* tmp;                                                                          \
+        while ((elm == NULL || RB_COLOR(elm, field) == RB_BLACK) && elm != RB_ROOT(head)) {        \
+            if (RB_LEFT(parent, field) == elm) {                                                   \
+                tmp = RB_RIGHT(parent, field);                                                     \
+                if (RB_COLOR(tmp, field) == RB_RED) {                                              \
+                    RB_SET_BLACKRED(tmp, parent, field);                                           \
+                    RB_ROTATE_LEFT(head, parent, tmp, field);                                      \
+                    tmp = RB_RIGHT(parent, field);                                                 \
+                }                                                                                  \
+                if ((RB_LEFT(tmp, field) == NULL ||                                                \
+                     RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) &&                          \
+                    (RB_RIGHT(tmp, field) == NULL ||                                               \
+                     RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) {                         \
+                    RB_COLOR(tmp, field) = RB_RED;                                                 \
+                    elm = parent;                                                                  \
+                    parent = RB_PARENT(elm, field);                                                \
+                } else {                                                                           \
+                    if (RB_RIGHT(tmp, field) == NULL ||                                            \
+                        RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK) {                       \
+                        struct type* oleft;                                                        \
+                        if ((oleft = RB_LEFT(tmp, field)) != NULL)                                 \
+                            RB_COLOR(oleft, field) = RB_BLACK;                                     \
+                        RB_COLOR(tmp, field) = RB_RED;                                             \
+                        RB_ROTATE_RIGHT(head, tmp, oleft, field);                                  \
+                        tmp = RB_RIGHT(parent, field);                                             \
+                    }                                                                              \
+                    RB_COLOR(tmp, field) = RB_COLOR(parent, field);                                \
+                    RB_COLOR(parent, field) = RB_BLACK;                                            \
+                    if (RB_RIGHT(tmp, field))                                                      \
+                        RB_COLOR(RB_RIGHT(tmp, field), field) = RB_BLACK;                          \
+                    RB_ROTATE_LEFT(head, parent, tmp, field);                                      \
+                    elm = RB_ROOT(head);                                                           \
+                    break;                                                                         \
+                }                                                                                  \
+            } else {                                                                               \
+                tmp = RB_LEFT(parent, field);                                                      \
+                if (RB_COLOR(tmp, field) == RB_RED) {                                              \
+                    RB_SET_BLACKRED(tmp, parent, field);                                           \
+                    RB_ROTATE_RIGHT(head, parent, tmp, field);                                     \
+                    tmp = RB_LEFT(parent, field);                                                  \
+                }                                                                                  \
+                if ((RB_LEFT(tmp, field) == NULL ||                                                \
+                     RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) &&                          \
+                    (RB_RIGHT(tmp, field) == NULL ||                                               \
+                     RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) {                         \
+                    RB_COLOR(tmp, field) = RB_RED;                                                 \
+                    elm = parent;                                                                  \
+                    parent = RB_PARENT(elm, field);                                                \
+                } else {                                                                           \
+                    if (RB_LEFT(tmp, field) == NULL ||                                             \
+                        RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) {                        \
+                        struct type* oright;                                                       \
+                        if ((oright = RB_RIGHT(tmp, field)) != NULL)                               \
+                            RB_COLOR(oright, field) = RB_BLACK;                                    \
+                        RB_COLOR(tmp, field) = RB_RED;                                             \
+                        RB_ROTATE_LEFT(head, tmp, oright, field);                                  \
+                        tmp = RB_LEFT(parent, field);                                              \
+                    }                                                                              \
+                    RB_COLOR(tmp, field) = RB_COLOR(parent, field);                                \
+                    RB_COLOR(parent, field) = RB_BLACK;                                            \
+                    if (RB_LEFT(tmp, field))                                                       \
+                        RB_COLOR(RB_LEFT(tmp, field), field) = RB_BLACK;                           \
+                    RB_ROTATE_RIGHT(head, parent, tmp, field);                                     \
+                    elm = RB_ROOT(head);                                                           \
+                    break;                                                                         \
+                }                                                                                  \
+            }                                                                                      \
+        }                                                                                          \
+        if (elm)                                                                                   \
+            RB_COLOR(elm, field) = RB_BLACK;                                                       \
+    }
+
+#define RB_GENERATE_REMOVE(name, type, field, attr)                                                \
+    attr struct type* name##_RB_REMOVE(struct name* head, struct type* elm) {                      \
+        struct type *child, *parent, *old = elm;                                                   \
+        int color;                                                                                 \
+        if (RB_LEFT(elm, field) == NULL)                                                           \
+            child = RB_RIGHT(elm, field);                                                          \
+        else if (RB_RIGHT(elm, field) == NULL)                                                     \
+            child = RB_LEFT(elm, field);                                                           \
+        else {                                                                                     \
+            struct type* left;                                                                     \
+            elm = RB_RIGHT(elm, field);                                                            \
+            while ((left = RB_LEFT(elm, field)) != NULL)                                           \
+                elm = left;                                                                        \
+            child = RB_RIGHT(elm, field);                                                          \
+            parent = RB_PARENT(elm, field);                                                        \
+            color = RB_COLOR(elm, field);                                                          \
+            if (child)                                                                             \
+                RB_PARENT(child, field) = parent;                                                  \
+            if (parent) {                                                                          \
+                if (RB_LEFT(parent, field) == elm)                                                 \
+                    RB_LEFT(parent, field) = child;                                                \
+                else                                                                               \
+                    RB_RIGHT(parent, field) = child;                                               \
+                RB_AUGMENT(parent);                                                                \
+            } else                                                                                 \
+                RB_ROOT(head) = child;                                                             \
+            if (RB_PARENT(elm, field) == old)                                                      \
+                parent = elm;                                                                      \
+            (elm)->field = (old)->field;                                                           \
+            if (RB_PARENT(old, field)) {                                                           \
+                if (RB_LEFT(RB_PARENT(old, field), field) == old)                                  \
+                    RB_LEFT(RB_PARENT(old, field), field) = elm;                                   \
+                else                                                                               \
+                    RB_RIGHT(RB_PARENT(old, field), field) = elm;                                  \
+                RB_AUGMENT(RB_PARENT(old, field));                                                 \
+            } else                                                                                 \
+                RB_ROOT(head) = elm;                                                               \
+            RB_PARENT(RB_LEFT(old, field), field) = elm;                                           \
+            if (RB_RIGHT(old, field))                                                              \
+                RB_PARENT(RB_RIGHT(old, field), field) = elm;                                      \
+            if (parent) {                                                                          \
+                left = parent;                                                                     \
+                do {                                                                               \
+                    RB_AUGMENT(left);                                                              \
+                } while ((left = RB_PARENT(left, field)) != NULL);                                 \
+            }                                                                                      \
+            goto color;                                                                            \
+        }                                                                                          \
+        parent = RB_PARENT(elm, field);                                                            \
+        color = RB_COLOR(elm, field);                                                              \
+        if (child)                                                                                 \
+            RB_PARENT(child, field) = parent;                                                      \
+        if (parent) {                                                                              \
+            if (RB_LEFT(parent, field) == elm)                                                     \
+                RB_LEFT(parent, field) = child;                                                    \
+            else                                                                                   \
+                RB_RIGHT(parent, field) = child;                                                   \
+            RB_AUGMENT(parent);                                                                    \
+        } else                                                                                     \
+            RB_ROOT(head) = child;                                                                 \
+    color:                                                                                         \
+        if (color == RB_BLACK)                                                                     \
+            name##_RB_REMOVE_COLOR(head, parent, child);                                           \
+        return (old);                                                                              \
+    }
+
+#define RB_GENERATE_INSERT(name, type, field, cmp, attr)                                           \
+    /* Inserts a node into the RB tree */                                                          \
+    attr struct type* name##_RB_INSERT(struct name* head, struct type* elm) {                      \
+        struct type* tmp;                                                                          \
+        struct type* parent = NULL;                                                                \
+        int comp = 0;                                                                              \
+        tmp = RB_ROOT(head);                                                                       \
+        while (tmp) {                                                                              \
+            parent = tmp;                                                                          \
+            comp = (cmp)(elm, parent);                                                             \
+            if (comp < 0)                                                                          \
+                tmp = RB_LEFT(tmp, field);                                                         \
+            else if (comp > 0)                                                                     \
+                tmp = RB_RIGHT(tmp, field);                                                        \
+            else                                                                                   \
+                return (tmp);                                                                      \
+        }                                                                                          \
+        RB_SET(elm, parent, field);                                                                \
+        if (parent != NULL) {                                                                      \
+            if (comp < 0)                                                                          \
+                RB_LEFT(parent, field) = elm;                                                      \
+            else                                                                                   \
+                RB_RIGHT(parent, field) = elm;                                                     \
+            RB_AUGMENT(parent);                                                                    \
+        } else                                                                                     \
+            RB_ROOT(head) = elm;                                                                   \
+        name##_RB_INSERT_COLOR(head, elm);                                                         \
+        return (NULL);                                                                             \
+    }
+
+#define RB_GENERATE_FIND(name, type, field, cmp, attr)                                             \
+    /* Finds the node with the same key as elm */                                                  \
+    attr struct type* name##_RB_FIND(struct name* head, struct type* elm) {                        \
+        struct type* tmp = RB_ROOT(head);                                                          \
+        int comp;                                                                                  \
+        while (tmp) {                                                                              \
+            comp = cmp(elm, tmp);                                                                  \
+            if (comp < 0)                                                                          \
+                tmp = RB_LEFT(tmp, field);                                                         \
+            else if (comp > 0)                                                                     \
+                tmp = RB_RIGHT(tmp, field);                                                        \
+            else                                                                                   \
+                return (tmp);                                                                      \
+        }                                                                                          \
+        return (NULL);                                                                             \
+    }
+
+#define RB_GENERATE_NFIND(name, type, field, cmp, attr)                                            \
+    /* Finds the first node greater than or equal to the search key */                             \
+    attr struct type* name##_RB_NFIND(struct name* head, struct type* elm) {                       \
+        struct type* tmp = RB_ROOT(head);                                                          \
+        struct type* res = NULL;                                                                   \
+        int comp;                                                                                  \
+        while (tmp) {                                                                              \
+            comp = cmp(elm, tmp);                                                                  \
+            if (comp < 0) {                                                                        \
+                res = tmp;                                                                         \
+                tmp = RB_LEFT(tmp, field);                                                         \
+            } else if (comp > 0)                                                                   \
+                tmp = RB_RIGHT(tmp, field);                                                        \
+            else                                                                                   \
+                return (tmp);                                                                      \
+        }                                                                                          \
+        return (res);                                                                              \
+    }
+
+#define RB_GENERATE_FIND_LIGHT(name, type, field, lcmp, attr)                                      \
+    /* Finds the node with the same key as elm */                                                  \
+    attr struct type* name##_RB_FIND_LIGHT(struct name* head, const void* lelm) {                  \
+        struct type* tmp = RB_ROOT(head);                                                          \
+        int comp;                                                                                  \
+        while (tmp) {                                                                              \
+            comp = lcmp(lelm, tmp);                                                                \
+            if (comp < 0)                                                                          \
+                tmp = RB_LEFT(tmp, field);                                                         \
+            else if (comp > 0)                                                                     \
+                tmp = RB_RIGHT(tmp, field);                                                        \
+            else                                                                                   \
+                return (tmp);                                                                      \
+        }                                                                                          \
+        return (NULL);                                                                             \
+    }
+
+#define RB_GENERATE_NFIND_LIGHT(name, type, field, lcmp, attr)                                     \
+    /* Finds the first node greater than or equal to the search key */                             \
+    attr struct type* name##_RB_NFIND_LIGHT(struct name* head, const void* lelm) {                 \
+        struct type* tmp = RB_ROOT(head);                                                          \
+        struct type* res = NULL;                                                                   \
+        int comp;                                                                                  \
+        while (tmp) {                                                                              \
+            comp = lcmp(lelm, tmp);                                                                \
+            if (comp < 0) {                                                                        \
+                res = tmp;                                                                         \
+                tmp = RB_LEFT(tmp, field);                                                         \
+            } else if (comp > 0)                                                                   \
+                tmp = RB_RIGHT(tmp, field);                                                        \
+            else                                                                                   \
+                return (tmp);                                                                      \
+        }                                                                                          \
+        return (res);                                                                              \
+    }
+
+#define RB_GENERATE_NEXT(name, type, field, attr)                                                  \
+    /* ARGSUSED */                                                                                 \
+    attr struct type* name##_RB_NEXT(struct type* elm) {                                           \
+        if (RB_RIGHT(elm, field)) {                                                                \
+            elm = RB_RIGHT(elm, field);                                                            \
+            while (RB_LEFT(elm, field))                                                            \
+                elm = RB_LEFT(elm, field);                                                         \
+        } else {                                                                                   \
+            if (RB_PARENT(elm, field) && (elm == RB_LEFT(RB_PARENT(elm, field), field)))           \
+                elm = RB_PARENT(elm, field);                                                       \
+            else {                                                                                 \
+                while (RB_PARENT(elm, field) && (elm == RB_RIGHT(RB_PARENT(elm, field), field)))   \
+                    elm = RB_PARENT(elm, field);                                                   \
+                elm = RB_PARENT(elm, field);                                                       \
+            }                                                                                      \
+        }                                                                                          \
+        return (elm);                                                                              \
+    }
+
+#define RB_GENERATE_PREV(name, type, field, attr)                                                  \
+    /* ARGSUSED */                                                                                 \
+    attr struct type* name##_RB_PREV(struct type* elm) {                                           \
+        if (RB_LEFT(elm, field)) {                                                                 \
+            elm = RB_LEFT(elm, field);                                                             \
+            while (RB_RIGHT(elm, field))                                                           \
+                elm = RB_RIGHT(elm, field);                                                        \
+        } else {                                                                                   \
+            if (RB_PARENT(elm, field) && (elm == RB_RIGHT(RB_PARENT(elm, field), field)))          \
+                elm = RB_PARENT(elm, field);                                                       \
+            else {                                                                                 \
+                while (RB_PARENT(elm, field) && (elm == RB_LEFT(RB_PARENT(elm, field), field)))    \
+                    elm = RB_PARENT(elm, field);                                                   \
+                elm = RB_PARENT(elm, field);                                                       \
+            }                                                                                      \
+        }                                                                                          \
+        return (elm);                                                                              \
+    }
+
+#define RB_GENERATE_MINMAX(name, type, field, attr)                                                \
+    attr struct type* name##_RB_MINMAX(struct name* head, int val) {                               \
+        struct type* tmp = RB_ROOT(head);                                                          \
+        struct type* parent = NULL;                                                                \
+        while (tmp) {                                                                              \
+            parent = tmp;                                                                          \
+            if (val < 0)                                                                           \
+                tmp = RB_LEFT(tmp, field);                                                         \
+            else                                                                                   \
+                tmp = RB_RIGHT(tmp, field);                                                        \
+        }                                                                                          \
+        return (parent);                                                                           \
+    }
+
+#define RB_NEGINF -1
+#define RB_INF 1
+
+#define RB_INSERT(name, x, y) name##_RB_INSERT(x, y)
+#define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y)
+#define RB_FIND(name, x, y) name##_RB_FIND(x, y)
+#define RB_NFIND(name, x, y) name##_RB_NFIND(x, y)
+#define RB_FIND_LIGHT(name, x, y) name##_RB_FIND_LIGHT(x, y)
+#define RB_NFIND_LIGHT(name, x, y) name##_RB_NFIND_LIGHT(x, y)
+#define RB_NEXT(name, x, y) name##_RB_NEXT(y)
+#define RB_PREV(name, x, y) name##_RB_PREV(y)
+#define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF)
+#define RB_MAX(name, x) name##_RB_MINMAX(x, RB_INF)
+
+#define RB_FOREACH(x, name, head)                                                                  \
+    for ((x) = RB_MIN(name, head); (x) != NULL; (x) = name##_RB_NEXT(x))
+
+#define RB_FOREACH_FROM(x, name, y)                                                                \
+    for ((x) = (y); ((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); (x) = (y))
+
+#define RB_FOREACH_SAFE(x, name, head, y)                                                          \
+    for ((x) = RB_MIN(name, head); ((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL);        \
+         (x) = (y))
+
+#define RB_FOREACH_REVERSE(x, name, head)                                                          \
+    for ((x) = RB_MAX(name, head); (x) != NULL; (x) = name##_RB_PREV(x))
+
+#define RB_FOREACH_REVERSE_FROM(x, name, y)                                                        \
+    for ((x) = (y); ((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); (x) = (y))
+
+#define RB_FOREACH_REVERSE_SAFE(x, name, head, y)                                                  \
+    for ((x) = RB_MAX(name, head); ((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL);        \
+         (x) = (y))
+
+#endif /* _SYS_TREE_H_ */

src/common/virtual_buffer.h

@@ -15,10 +15,12 @@ void FreeMemoryPages(void* base, std::size_t size) noexcept;
 template <typename T>
 class VirtualBuffer final {
 public:
-    static_assert(
-        std::is_trivially_constructible_v<T>,
-        "T must be trivially constructible, as non-trivial constructors will not be executed "
-        "with the current allocator");
+    // TODO: Uncomment this and change Common::PageTable::PageInfo to be trivially constructible
+    // using std::atomic_ref once libc++ has support for it
+    // static_assert(
+    //     std::is_trivially_constructible_v<T>,
+    //     "T must be trivially constructible, as non-trivial constructors will not be executed "
+    //     "with the current allocator");
 
     constexpr VirtualBuffer() = default;
     explicit VirtualBuffer(std::size_t count) : alloc_size{count * sizeof(T)} {

src/core/CMakeLists.txt

@@ -135,13 +135,13 @@ add_library(core STATIC
     frontend/emu_window.h
     frontend/framebuffer_layout.cpp
     frontend/framebuffer_layout.h
+    frontend/input_interpreter.cpp
+    frontend/input_interpreter.h
     frontend/input.h
     hardware_interrupt_manager.cpp
     hardware_interrupt_manager.h
     hle/ipc.h
     hle/ipc_helpers.h
-    hle/kernel/address_arbiter.cpp
-    hle/kernel/address_arbiter.h
     hle/kernel/client_port.cpp
     hle/kernel/client_port.h
     hle/kernel/client_session.cpp
@@ -149,10 +149,25 @@ add_library(core STATIC
     hle/kernel/code_set.cpp
     hle/kernel/code_set.h
     hle/kernel/errors.h
+    hle/kernel/global_scheduler_context.cpp
+    hle/kernel/global_scheduler_context.h
     hle/kernel/handle_table.cpp
     hle/kernel/handle_table.h
     hle/kernel/hle_ipc.cpp
     hle/kernel/hle_ipc.h
+    hle/kernel/k_address_arbiter.cpp
+    hle/kernel/k_address_arbiter.h
+    hle/kernel/k_affinity_mask.h
+    hle/kernel/k_condition_variable.cpp
+    hle/kernel/k_condition_variable.h
+    hle/kernel/k_priority_queue.h
+    hle/kernel/k_scheduler.cpp
+    hle/kernel/k_scheduler.h
+    hle/kernel/k_scheduler_lock.h
+    hle/kernel/k_scoped_lock.h
+    hle/kernel/k_scoped_scheduler_lock_and_sleep.h
+    hle/kernel/k_synchronization_object.cpp
+    hle/kernel/k_synchronization_object.h
     hle/kernel/kernel.cpp
     hle/kernel/kernel.h
     hle/kernel/memory/address_space_info.cpp
@@ -172,8 +187,6 @@ add_library(core STATIC
     hle/kernel/memory/slab_heap.h
     hle/kernel/memory/system_control.cpp
     hle/kernel/memory/system_control.h
-    hle/kernel/mutex.cpp
-    hle/kernel/mutex.h
     hle/kernel/object.cpp
     hle/kernel/object.h
     hle/kernel/physical_core.cpp
@@ -187,24 +200,22 @@ add_library(core STATIC
     hle/kernel/readable_event.h
     hle/kernel/resource_limit.cpp
     hle/kernel/resource_limit.h
-    hle/kernel/scheduler.cpp
-    hle/kernel/scheduler.h
     hle/kernel/server_port.cpp
     hle/kernel/server_port.h
     hle/kernel/server_session.cpp
     hle/kernel/server_session.h
+    hle/kernel/service_thread.cpp
+    hle/kernel/service_thread.h
     hle/kernel/session.cpp
     hle/kernel/session.h
     hle/kernel/shared_memory.cpp
     hle/kernel/shared_memory.h
     hle/kernel/svc.cpp
     hle/kernel/svc.h
+    hle/kernel/svc_common.h
+    hle/kernel/svc_results.h
     hle/kernel/svc_types.h
     hle/kernel/svc_wrap.h
-    hle/kernel/synchronization_object.cpp
-    hle/kernel/synchronization_object.h
-    hle/kernel/synchronization.cpp
-    hle/kernel/synchronization.h
     hle/kernel/thread.cpp
     hle/kernel/thread.h
     hle/kernel/time_manager.cpp
@@ -491,7 +502,6 @@ add_library(core STATIC
     hle/service/sm/controller.h
     hle/service/sm/sm.cpp
     hle/service/sm/sm.h
-    hle/service/sockets/blocking_worker.h
     hle/service/sockets/bsd.cpp
     hle/service/sockets/bsd.h
     hle/service/sockets/ethc.cpp
@@ -625,6 +635,8 @@ if (MSVC)
         /we4267
         # 'context' : truncation from 'type1' to 'type2'
         /we4305
+        # 'function' : not all control paths return a value
+        /we4715
     )
 else()
     target_compile_options(core PRIVATE

src/core/arm/arm_interface.h

@@ -26,9 +26,10 @@ using CPUInterrupts = std::array<CPUInterruptHandler, Core::Hardware::NUM_CPU_CO
 /// Generic ARMv8 CPU interface
 class ARM_Interface : NonCopyable {
 public:
-    explicit ARM_Interface(System& system_, CPUInterrupts& interrupt_handlers, bool uses_wall_clock)
-        : system{system_}, interrupt_handlers{interrupt_handlers}, uses_wall_clock{
-                                                                       uses_wall_clock} {}
+    explicit ARM_Interface(System& system_, CPUInterrupts& interrupt_handlers_,
+                           bool uses_wall_clock_)
+        : system{system_}, interrupt_handlers{interrupt_handlers_}, uses_wall_clock{
+                                                                        uses_wall_clock_} {}
     virtual ~ARM_Interface() = default;
 
     struct ThreadContext32 {

src/core/arm/dynarmic/arm_dynarmic_32.cpp

@@ -71,15 +71,8 @@ public:
     }
 
     void ExceptionRaised(u32 pc, Dynarmic::A32::Exception exception) override {
-        switch (exception) {
-        case Dynarmic::A32::Exception::UndefinedInstruction:
-        case Dynarmic::A32::Exception::UnpredictableInstruction:
-            break;
-        case Dynarmic::A32::Exception::Breakpoint:
-            break;
-        }
         LOG_CRITICAL(Core_ARM, "ExceptionRaised(exception = {}, pc = {:08X}, code = {:08X})",
-                     static_cast<std::size_t>(exception), pc, MemoryReadCode(pc));
+                     exception, pc, MemoryReadCode(pc));
         UNIMPLEMENTED();
     }
 
@@ -133,6 +126,7 @@ std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable&
     config.page_table = reinterpret_cast<std::array<std::uint8_t*, NUM_PAGE_TABLE_ENTRIES>*>(
         page_table.pointers.data());
     config.absolute_offset_page_table = true;
+    config.page_table_pointer_mask_bits = Common::PageTable::ATTRIBUTE_BITS;
     config.detect_misaligned_access_via_page_table = 16 | 32 | 64 | 128;
     config.only_detect_misalignment_via_page_table_on_page_boundary = true;
 
@@ -180,6 +174,9 @@ std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable&
         if (Settings::values.cpuopt_unsafe_reduce_fp_error) {
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_ReducedErrorFP;
         }
+        if (Settings::values.cpuopt_unsafe_inaccurate_nan) {
+            config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_InaccurateNaN;
+        }
     }
 
     return std::make_unique<Dynarmic::A32::Jit>(config);
@@ -294,6 +291,9 @@ void ARM_Dynarmic_32::InvalidateCacheRange(VAddr addr, std::size_t size) {
 }
 
 void ARM_Dynarmic_32::ClearExclusiveState() {
+    if (!jit) {
+        return;
+    }
     jit->ClearExclusiveState();
 }
 

src/core/arm/dynarmic/arm_dynarmic_64.cpp

@@ -15,8 +15,8 @@
 #include "core/core.h"
 #include "core/core_timing.h"
 #include "core/hardware_properties.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/svc.h"
 #include "core/memory.h"
 #include "core/settings.h"
@@ -152,6 +152,7 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable&
     // Memory
     config.page_table = reinterpret_cast<void**>(page_table.pointers.data());
     config.page_table_address_space_bits = address_space_bits;
+    config.page_table_pointer_mask_bits = Common::PageTable::ATTRIBUTE_BITS;
     config.silently_mirror_page_table = false;
     config.absolute_offset_page_table = true;
     config.detect_misaligned_access_via_page_table = 16 | 32 | 64 | 128;
@@ -211,6 +212,9 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable&
         if (Settings::values.cpuopt_unsafe_reduce_fp_error) {
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_ReducedErrorFP;
         }
+        if (Settings::values.cpuopt_unsafe_inaccurate_nan) {
+            config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_InaccurateNaN;
+        }
     }
 
     return std::make_shared<Dynarmic::A64::Jit>(config);
@@ -330,6 +334,9 @@ void ARM_Dynarmic_64::InvalidateCacheRange(VAddr addr, std::size_t size) {
 }
 
 void ARM_Dynarmic_64::ClearExclusiveState() {
+    if (!jit) {
+        return;
+    }
     jit->ClearExclusiveState();
 }
 

src/core/core.cpp

@@ -27,10 +27,10 @@
 #include "core/file_sys/vfs_real.h"
 #include "core/hardware_interrupt_manager.h"
 #include "core/hle/kernel/client_port.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/physical_core.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/service/am/applets/applets.h"
 #include "core/hle/service/apm/controller.h"
@@ -159,7 +159,7 @@ struct System::Impl {
         device_memory = std::make_unique<Core::DeviceMemory>();
 
         is_multicore = Settings::values.use_multi_core.GetValue();
-        is_async_gpu = is_multicore || Settings::values.use_asynchronous_gpu_emulation.GetValue();
+        is_async_gpu = Settings::values.use_asynchronous_gpu_emulation.GetValue();
 
         kernel.SetMulticore(is_multicore);
         cpu_manager.SetMulticore(is_multicore);
@@ -307,7 +307,6 @@ struct System::Impl {
         service_manager.reset();
         cheat_engine.reset();
         telemetry_session.reset();
-        device_memory.reset();
 
         // Close all CPU/threading state
         cpu_manager.Shutdown();
@@ -507,14 +506,6 @@ std::size_t System::CurrentCoreIndex() const {
     return core;
 }
 
-Kernel::Scheduler& System::CurrentScheduler() {
-    return impl->kernel.CurrentScheduler();
-}
-
-const Kernel::Scheduler& System::CurrentScheduler() const {
-    return impl->kernel.CurrentScheduler();
-}
-
 Kernel::PhysicalCore& System::CurrentPhysicalCore() {
     return impl->kernel.CurrentPhysicalCore();
 }
@@ -523,22 +514,14 @@ const Kernel::PhysicalCore& System::CurrentPhysicalCore() const {
     return impl->kernel.CurrentPhysicalCore();
 }
 
-Kernel::Scheduler& System::Scheduler(std::size_t core_index) {
-    return impl->kernel.Scheduler(core_index);
-}
-
-const Kernel::Scheduler& System::Scheduler(std::size_t core_index) const {
-    return impl->kernel.Scheduler(core_index);
+/// Gets the global scheduler
+Kernel::GlobalSchedulerContext& System::GlobalSchedulerContext() {
+    return impl->kernel.GlobalSchedulerContext();
 }
 
 /// Gets the global scheduler
-Kernel::GlobalScheduler& System::GlobalScheduler() {
-    return impl->kernel.GlobalScheduler();
-}
-
-/// Gets the global scheduler
-const Kernel::GlobalScheduler& System::GlobalScheduler() const {
-    return impl->kernel.GlobalScheduler();
+const Kernel::GlobalSchedulerContext& System::GlobalSchedulerContext() const {
+    return impl->kernel.GlobalSchedulerContext();
 }
 
 Kernel::Process* System::CurrentProcess() {

src/core/core.h

@@ -26,11 +26,11 @@ class VfsFilesystem;
 } // namespace FileSys
 
 namespace Kernel {
-class GlobalScheduler;
+class GlobalSchedulerContext;
 class KernelCore;
 class PhysicalCore;
 class Process;
-class Scheduler;
+class KScheduler;
 } // namespace Kernel
 
 namespace Loader {
@@ -213,12 +213,6 @@ public:
     /// Gets the index of the currently running CPU core
     [[nodiscard]] std::size_t CurrentCoreIndex() const;
 
-    /// Gets the scheduler for the CPU core that is currently running
-    [[nodiscard]] Kernel::Scheduler& CurrentScheduler();
-
-    /// Gets the scheduler for the CPU core that is currently running
-    [[nodiscard]] const Kernel::Scheduler& CurrentScheduler() const;
-
     /// Gets the physical core for the CPU core that is currently running
     [[nodiscard]] Kernel::PhysicalCore& CurrentPhysicalCore();
 
@@ -261,17 +255,11 @@ public:
     /// Gets an immutable reference to the renderer.
     [[nodiscard]] const VideoCore::RendererBase& Renderer() const;
 
-    /// Gets the scheduler for the CPU core with the specified index
-    [[nodiscard]] Kernel::Scheduler& Scheduler(std::size_t core_index);
-
-    /// Gets the scheduler for the CPU core with the specified index
-    [[nodiscard]] const Kernel::Scheduler& Scheduler(std::size_t core_index) const;
+    /// Gets the global scheduler
+    [[nodiscard]] Kernel::GlobalSchedulerContext& GlobalSchedulerContext();
 
     /// Gets the global scheduler
-    [[nodiscard]] Kernel::GlobalScheduler& GlobalScheduler();
-
-    /// Gets the global scheduler
-    [[nodiscard]] const Kernel::GlobalScheduler& GlobalScheduler() const;
+    [[nodiscard]] const Kernel::GlobalSchedulerContext& GlobalSchedulerContext() const;
 
     /// Gets the manager for the guest device memory
     [[nodiscard]] Core::DeviceMemory& DeviceMemory();

src/core/core_timing.cpp

@@ -49,6 +49,7 @@ void CoreTiming::ThreadEntry(CoreTiming& instance) {
     Common::SetCurrentThreadPriority(Common::ThreadPriority::VeryHigh);
     instance.on_thread_init();
     instance.ThreadLoop();
+    MicroProfileOnThreadExit();
 }
 
 void CoreTiming::Initialize(std::function<void()>&& on_thread_init_) {

src/core/cpu_manager.cpp

@@ -10,9 +10,9 @@
 #include "core/core.h"
 #include "core/core_timing.h"
 #include "core/cpu_manager.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/physical_core.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/thread.h"
 #include "video_core/gpu.h"
 
@@ -109,11 +109,8 @@ void* CpuManager::GetStartFuncParamater() {
 
 void CpuManager::MultiCoreRunGuestThread() {
     auto& kernel = system.Kernel();
-    {
-        auto& sched = kernel.CurrentScheduler();
-        sched.OnThreadStart();
-    }
-    auto* thread = kernel.CurrentScheduler().GetCurrentThread();
+    kernel.CurrentScheduler()->OnThreadStart();
+    auto* thread = kernel.CurrentScheduler()->GetCurrentThread();
     auto& host_context = thread->GetHostContext();
     host_context->SetRewindPoint(GuestRewindFunction, this);
     MultiCoreRunGuestLoop();
@@ -130,8 +127,8 @@ void CpuManager::MultiCoreRunGuestLoop() {
             physical_core = &kernel.CurrentPhysicalCore();
         }
         system.ExitDynarmicProfile();
-        auto& scheduler = kernel.CurrentScheduler();
-        scheduler.TryDoContextSwitch();
+        physical_core->ArmInterface().ClearExclusiveState();
+        kernel.CurrentScheduler()->RescheduleCurrentCore();
     }
 }
 
@@ -140,25 +137,21 @@ void CpuManager::MultiCoreRunIdleThread() {
     while (true) {
         auto& physical_core = kernel.CurrentPhysicalCore();
         physical_core.Idle();
-        auto& scheduler = kernel.CurrentScheduler();
-        scheduler.TryDoContextSwitch();
+        kernel.CurrentScheduler()->RescheduleCurrentCore();
     }
 }
 
 void CpuManager::MultiCoreRunSuspendThread() {
     auto& kernel = system.Kernel();
-    {
-        auto& sched = kernel.CurrentScheduler();
-        sched.OnThreadStart();
-    }
+    kernel.CurrentScheduler()->OnThreadStart();
     while (true) {
         auto core = kernel.GetCurrentHostThreadID();
-        auto& scheduler = kernel.CurrentScheduler();
+        auto& scheduler = *kernel.CurrentScheduler();
         Kernel::Thread* current_thread = scheduler.GetCurrentThread();
         Common::Fiber::YieldTo(current_thread->GetHostContext(), core_data[core].host_context);
         ASSERT(scheduler.ContextSwitchPending());
         ASSERT(core == kernel.GetCurrentHostThreadID());
-        scheduler.TryDoContextSwitch();
+        scheduler.RescheduleCurrentCore();
     }
 }
 
@@ -206,11 +199,8 @@ void CpuManager::MultiCorePause(bool paused) {
 
 void CpuManager::SingleCoreRunGuestThread() {
     auto& kernel = system.Kernel();
-    {
-        auto& sched = kernel.CurrentScheduler();
-        sched.OnThreadStart();
-    }
-    auto* thread = kernel.CurrentScheduler().GetCurrentThread();
+    kernel.CurrentScheduler()->OnThreadStart();
+    auto* thread = kernel.CurrentScheduler()->GetCurrentThread();
     auto& host_context = thread->GetHostContext();
     host_context->SetRewindPoint(GuestRewindFunction, this);
     SingleCoreRunGuestLoop();
@@ -218,7 +208,7 @@ void CpuManager::SingleCoreRunGuestThread() {
 
 void CpuManager::SingleCoreRunGuestLoop() {
     auto& kernel = system.Kernel();
-    auto* thread = kernel.CurrentScheduler().GetCurrentThread();
+    auto* thread = kernel.CurrentScheduler()->GetCurrentThread();
     while (true) {
         auto* physical_core = &kernel.CurrentPhysicalCore();
         system.EnterDynarmicProfile();
@@ -230,9 +220,10 @@ void CpuManager::SingleCoreRunGuestLoop() {
         thread->SetPhantomMode(true);
         system.CoreTiming().Advance();
         thread->SetPhantomMode(false);
+        physical_core->ArmInterface().ClearExclusiveState();
         PreemptSingleCore();
         auto& scheduler = kernel.Scheduler(current_core);
-        scheduler.TryDoContextSwitch();
+        scheduler.RescheduleCurrentCore();
     }
 }
 
@@ -244,51 +235,53 @@ void CpuManager::SingleCoreRunIdleThread() {
         system.CoreTiming().AddTicks(1000U);
         idle_count++;
         auto& scheduler = physical_core.Scheduler();
-        scheduler.TryDoContextSwitch();
+        scheduler.RescheduleCurrentCore();
     }
 }
 
 void CpuManager::SingleCoreRunSuspendThread() {
     auto& kernel = system.Kernel();
-    {
-        auto& sched = kernel.CurrentScheduler();
-        sched.OnThreadStart();
-    }
+    kernel.CurrentScheduler()->OnThreadStart();
     while (true) {
         auto core = kernel.GetCurrentHostThreadID();
-        auto& scheduler = kernel.CurrentScheduler();
+        auto& scheduler = *kernel.CurrentScheduler();
         Kernel::Thread* current_thread = scheduler.GetCurrentThread();
         Common::Fiber::YieldTo(current_thread->GetHostContext(), core_data[0].host_context);
         ASSERT(scheduler.ContextSwitchPending());
         ASSERT(core == kernel.GetCurrentHostThreadID());
-        scheduler.TryDoContextSwitch();
+        scheduler.RescheduleCurrentCore();
     }
 }
 
 void CpuManager::PreemptSingleCore(bool from_running_enviroment) {
-    std::size_t old_core = current_core;
-    auto& scheduler = system.Kernel().Scheduler(old_core);
-    Kernel::Thread* current_thread = scheduler.GetCurrentThread();
-    if (idle_count >= 4 || from_running_enviroment) {
-        if (!from_running_enviroment) {
-            system.CoreTiming().Idle();
+    {
+        auto& scheduler = system.Kernel().Scheduler(current_core);
+        Kernel::Thread* current_thread = scheduler.GetCurrentThread();
+        if (idle_count >= 4 || from_running_enviroment) {
+            if (!from_running_enviroment) {
+                system.CoreTiming().Idle();
+                idle_count = 0;
+            }
+            current_thread->SetPhantomMode(true);
+            system.CoreTiming().Advance();
+            current_thread->SetPhantomMode(false);
+        }
+        current_core.store((current_core + 1) % Core::Hardware::NUM_CPU_CORES);
+        system.CoreTiming().ResetTicks();
+        scheduler.Unload(scheduler.GetCurrentThread());
+
+        auto& next_scheduler = system.Kernel().Scheduler(current_core);
+        Common::Fiber::YieldTo(current_thread->GetHostContext(), next_scheduler.ControlContext());
+    }
+
+    // May have changed scheduler
+    {
+        auto& scheduler = system.Kernel().Scheduler(current_core);
+        scheduler.Reload(scheduler.GetCurrentThread());
+        auto* currrent_thread2 = scheduler.GetCurrentThread();
+        if (!currrent_thread2->IsIdleThread()) {
             idle_count = 0;
         }
-        current_thread->SetPhantomMode(true);
-        system.CoreTiming().Advance();
-        current_thread->SetPhantomMode(false);
-    }
-    current_core.store((current_core + 1) % Core::Hardware::NUM_CPU_CORES);
-    system.CoreTiming().ResetTicks();
-    scheduler.Unload();
-    auto& next_scheduler = system.Kernel().Scheduler(current_core);
-    Common::Fiber::YieldTo(current_thread->GetHostContext(), next_scheduler.ControlContext());
-    /// May have changed scheduler
-    auto& current_scheduler = system.Kernel().Scheduler(current_core);
-    current_scheduler.Reload();
-    auto* currrent_thread2 = current_scheduler.GetCurrentThread();
-    if (!currrent_thread2->IsIdleThread()) {
-        idle_count = 0;
     }
 }
 
@@ -369,8 +362,7 @@ void CpuManager::RunThread(std::size_t core) {
             return;
         }
 
-        auto& scheduler = system.Kernel().CurrentScheduler();
-        Kernel::Thread* current_thread = scheduler.GetCurrentThread();
+        auto current_thread = system.Kernel().CurrentScheduler()->GetCurrentThread();
         data.is_running = true;
         Common::Fiber::YieldTo(data.host_context, current_thread->GetHostContext());
         data.is_running = false;

src/core/crypto/key_manager.cpp

@@ -143,6 +143,7 @@ u64 GetSignatureTypeDataSize(SignatureType type) {
         return 0x3C;
     }
     UNREACHABLE();
+    return 0;
 }
 
 u64 GetSignatureTypePaddingSize(SignatureType type) {
@@ -157,6 +158,7 @@ u64 GetSignatureTypePaddingSize(SignatureType type) {
         return 0x40;
     }
     UNREACHABLE();
+    return 0;
 }
 
 SignatureType Ticket::GetSignatureType() const {
@@ -169,8 +171,7 @@ SignatureType Ticket::GetSignatureType() const {
     if (const auto* ticket = std::get_if<ECDSATicket>(&data)) {
         return ticket->sig_type;
     }
-
-    UNREACHABLE();
+    throw std::bad_variant_access{};
 }
 
 TicketData& Ticket::GetData() {
@@ -183,8 +184,7 @@ TicketData& Ticket::GetData() {
     if (auto* ticket = std::get_if<ECDSATicket>(&data)) {
         return ticket->data;
     }
-
-    UNREACHABLE();
+    throw std::bad_variant_access{};
 }
 
 const TicketData& Ticket::GetData() const {
@@ -197,8 +197,7 @@ const TicketData& Ticket::GetData() const {
     if (const auto* ticket = std::get_if<ECDSATicket>(&data)) {
         return ticket->data;
     }
-
-    UNREACHABLE();
+    throw std::bad_variant_access{};
 }
 
 u64 Ticket::GetSize() const {

src/core/file_sys/nca_patch.cpp

@@ -51,8 +51,8 @@ std::pair<std::size_t, std::size_t> SearchBucketEntry(u64 offset, const BlockTyp
             low = mid + 1;
         }
     }
-
     UNREACHABLE_MSG("Offset could not be found in BKTR block.");
+    return {0, 0};
 }
 } // Anonymous namespace
 

src/core/file_sys/registered_cache.cpp

@@ -105,7 +105,8 @@ ContentRecordType GetCRTypeFromNCAType(NCAContentType type) {
         // TODO(DarkLordZach): Peek at NCA contents to differentiate Manual and Legal.
         return ContentRecordType::HtmlDocument;
     default:
-        UNREACHABLE_MSG("Invalid NCAContentType={:02X}", static_cast<u8>(type));
+        UNREACHABLE_MSG("Invalid NCAContentType={:02X}", type);
+        return ContentRecordType{};
     }
 }
 

src/core/file_sys/registered_cache.h

@@ -67,18 +67,18 @@ public:
     virtual void Refresh() = 0;
 
     virtual bool HasEntry(u64 title_id, ContentRecordType type) const = 0;
-    virtual bool HasEntry(ContentProviderEntry entry) const;
+    bool HasEntry(ContentProviderEntry entry) const;
 
     virtual std::optional<u32> GetEntryVersion(u64 title_id) const = 0;
 
     virtual VirtualFile GetEntryUnparsed(u64 title_id, ContentRecordType type) const = 0;
-    virtual VirtualFile GetEntryUnparsed(ContentProviderEntry entry) const;
+    VirtualFile GetEntryUnparsed(ContentProviderEntry entry) const;
 
     virtual VirtualFile GetEntryRaw(u64 title_id, ContentRecordType type) const = 0;
-    virtual VirtualFile GetEntryRaw(ContentProviderEntry entry) const;
+    VirtualFile GetEntryRaw(ContentProviderEntry entry) const;
 
     virtual std::unique_ptr<NCA> GetEntry(u64 title_id, ContentRecordType type) const = 0;
-    virtual std::unique_ptr<NCA> GetEntry(ContentProviderEntry entry) const;
+    std::unique_ptr<NCA> GetEntry(ContentProviderEntry entry) const;
 
     virtual std::vector<ContentProviderEntry> ListEntries() const;
 

src/core/file_sys/system_archive/data/font_nintendo_extended.cpp

@@ -6,191 +6,384 @@
 
 namespace FileSys::SystemArchive::SharedFontData {
 
-const std::array<unsigned char, 2932> FONT_NINTENDO_EXTENDED{{
-    0x00, 0x01, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x80, 0x00, 0x03, 0x00, 0x70, 0x44, 0x53, 0x49, 0x47,
-    0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x0b, 0x6c, 0x00, 0x00, 0x00, 0x08, 0x4f, 0x53, 0x2f, 0x32,
-    0x33, 0x86, 0x1d, 0x9b, 0x00, 0x00, 0x01, 0x78, 0x00, 0x00, 0x00, 0x60, 0x63, 0x6d, 0x61, 0x70,
-    0xc2, 0x06, 0x20, 0xde, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0xa0, 0x63, 0x76, 0x74, 0x20,
-    0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x04, 0x2c, 0x00, 0x00, 0x00, 0x06, 0x66, 0x70, 0x67, 0x6d,
-    0x06, 0x59, 0x9c, 0x37, 0x00, 0x00, 0x02, 0xa0, 0x00, 0x00, 0x01, 0x73, 0x67, 0x61, 0x73, 0x70,
-    0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x0b, 0x64, 0x00, 0x00, 0x00, 0x08, 0x67, 0x6c, 0x79, 0x66,
-    0x10, 0x31, 0x88, 0x00, 0x00, 0x00, 0x04, 0x34, 0x00, 0x00, 0x04, 0x64, 0x68, 0x65, 0x61, 0x64,
-    0x15, 0x9d, 0xef, 0x91, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x00, 0x00, 0x36, 0x68, 0x68, 0x65, 0x61,
-    0x09, 0x60, 0x03, 0x71, 0x00, 0x00, 0x01, 0x34, 0x00, 0x00, 0x00, 0x24, 0x68, 0x6d, 0x74, 0x78,
-    0x0d, 0x2e, 0x03, 0xa7, 0x00, 0x00, 0x01, 0xd8, 0x00, 0x00, 0x00, 0x26, 0x6c, 0x6f, 0x63, 0x61,
-    0x05, 0xc0, 0x04, 0x6c, 0x00, 0x00, 0x08, 0x98, 0x00, 0x00, 0x00, 0x1e, 0x6d, 0x61, 0x78, 0x70,
-    0x02, 0x1c, 0x00, 0x5f, 0x00, 0x00, 0x01, 0x58, 0x00, 0x00, 0x00, 0x20, 0x6e, 0x61, 0x6d, 0x65,
-    0x7c, 0xe0, 0x84, 0x5c, 0x00, 0x00, 0x08, 0xb8, 0x00, 0x00, 0x02, 0x09, 0x70, 0x6f, 0x73, 0x74,
-    0x47, 0x4e, 0x74, 0x19, 0x00, 0x00, 0x0a, 0xc4, 0x00, 0x00, 0x00, 0x9e, 0x70, 0x72, 0x65, 0x70,
-    0x1c, 0xfc, 0x7d, 0x9c, 0x00, 0x00, 0x04, 0x14, 0x00, 0x00, 0x00, 0x16, 0x00, 0x01, 0x00, 0x00,
-    0x00, 0x01, 0x00, 0x00, 0x7c, 0xc7, 0xb1, 0x63, 0x5f, 0x0f, 0x3c, 0xf5, 0x00, 0x1b, 0x03, 0xe8,
-    0x00, 0x00, 0x00, 0x00, 0xd9, 0x44, 0x2f, 0x5d, 0x00, 0x00, 0x00, 0x00, 0xd9, 0x45, 0x7b, 0x69,
-    0x00, 0x00, 0x00, 0x00, 0x03, 0xe6, 0x03, 0xe8, 0x00, 0x00, 0x00, 0x06, 0x00, 0x02, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x03, 0x84, 0xff, 0x83, 0x01, 0xf4, 0x03, 0xe8,
-    0x00, 0x00, 0x00, 0x00, 0x03, 0xe6, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x5e,
-    0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00,
-    0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x03, 0x74, 0x01, 0x90, 0x00, 0x05,
-    0x00, 0x04, 0x00, 0xcd, 0x00, 0xcd, 0x00, 0x00, 0x01, 0x1f, 0x00, 0xcd, 0x00, 0xcd, 0x00, 0x00,
-    0x03, 0xc3, 0x00, 0x66, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+const std::array<unsigned char, 6024> FONT_NINTENDO_EXTENDED{{
+    0x00, 0x01, 0x00, 0x00, 0x00, 0x0E, 0x00, 0x80, 0x00, 0x03, 0x00, 0x60, 0x4F, 0x53, 0x2F, 0x32,
+    0x34, 0x00, 0x1E, 0x26, 0x00, 0x00, 0x01, 0x68, 0x00, 0x00, 0x00, 0x60, 0x63, 0x6D, 0x61, 0x70,
+    0xC1, 0xE7, 0xC8, 0xF3, 0x00, 0x00, 0x02, 0x0C, 0x00, 0x00, 0x01, 0x72, 0x63, 0x76, 0x74, 0x20,
+    0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x05, 0x0C, 0x00, 0x00, 0x00, 0x06, 0x66, 0x70, 0x67, 0x6D,
+    0x06, 0x59, 0x9C, 0x37, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x01, 0x73, 0x67, 0x61, 0x73, 0x70,
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+    0x11, 0x09, 0x1A, 0x01, 0x01, 0x07, 0x1E, 0x15, 0x29, 0x01, 0x2D, 0x2D, 0x1A, 0x2C, 0x16, 0x16,
+    0x0D, 0x0F, 0x1A, 0x14, 0x0C, 0x0D, 0x27, 0x04, 0x0C, 0x03, 0x03, 0x04, 0x1E, 0x00, 0x00, 0x00,
+    0x00, 0x02, 0x00, 0x14, 0xFF, 0x98, 0x03, 0xEC, 0x03, 0x70, 0x00, 0x0B, 0x00, 0x17, 0x00, 0x00,
+    0x00, 0x20, 0x1E, 0x01, 0x10, 0x0E, 0x01, 0x20, 0x2E, 0x01, 0x10, 0x36, 0x13, 0x15, 0x33, 0x15,
+    0x33, 0x35, 0x33, 0x35, 0x23, 0x35, 0x23, 0x15, 0x01, 0x7A, 0x01, 0x0C, 0xE2, 0x84, 0x84, 0xE2,
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+    0x00, 0x20, 0x1E, 0x01, 0x10, 0x0E, 0x01, 0x20, 0x2E, 0x01, 0x10, 0x36, 0x13, 0x21, 0x35, 0x21,
+    0x01, 0x7A, 0x01, 0x0C, 0xE2, 0x84, 0x84, 0xE2, 0xFE, 0xF4, 0xE2, 0x84, 0x84, 0x7C, 0x01, 0xD8,
+    0xFE, 0x28, 0x03, 0x70, 0x84, 0xE2, 0xFE, 0xF4, 0xE2, 0x84, 0x84, 0xE2, 0x01, 0x0C, 0xE2, 0xFE,
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+    0x01, 0x1D, 0x00, 0x59, 0x00, 0x75, 0x00, 0x7A, 0x00, 0x75, 0x00, 0x20, 0x00, 0x45, 0x00, 0x6D,
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+    0x78, 0x00, 0x74, 0x00, 0x65, 0x00, 0x6E, 0x00, 0x73, 0x00, 0x69, 0x00, 0x6F, 0x00, 0x6E, 0x00,
+    0x00, 0x59, 0x75, 0x7A, 0x75, 0x4F, 0x53, 0x53, 0x45, 0x78, 0x74, 0x65, 0x6E, 0x73, 0x69, 0x6F,
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+    0x73, 0x69, 0x6F, 0x6E, 0x00, 0x00, 0x56, 0x00, 0x65, 0x00, 0x72, 0x00, 0x73, 0x00, 0x69, 0x00,
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+    0x00, 0x59, 0x75, 0x7A, 0x75, 0x4F, 0x53, 0x53, 0x45, 0x78, 0x74, 0x65, 0x6E, 0x73, 0x69, 0x6F,
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+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x1C, 0x00, 0x00, 0x01, 0x02, 0x01, 0x03, 0x00, 0x03, 0x01, 0x04,
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+    0x01, 0x0D, 0x01, 0x0E, 0x01, 0x0F, 0x01, 0x10, 0x01, 0x11, 0x01, 0x12, 0x01, 0x13, 0x01, 0x14,
+    0x01, 0x15, 0x01, 0x16, 0x01, 0x17, 0x01, 0x18, 0x01, 0x19, 0x01, 0x1A, 0x01, 0x1B, 0x07, 0x75,
+    0x6E, 0x69, 0x30, 0x30, 0x30, 0x30, 0x07, 0x75, 0x6E, 0x69, 0x30, 0x30, 0x30, 0x44, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x41, 0x30, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x41, 0x31, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x41, 0x32, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x41, 0x33, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x41, 0x34, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x41, 0x35, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x41, 0x36, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x41, 0x37, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x41, 0x38, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x41, 0x39, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x42, 0x33, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x42, 0x34, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x45, 0x30, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x45, 0x31, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x45, 0x32, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x45, 0x33, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x45, 0x34, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x45, 0x35, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x45, 0x36, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x45, 0x37, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x45, 0x38, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x45, 0x39, 0x07, 0x75,
+    0x6E, 0x69, 0x45, 0x30, 0x45, 0x46, 0x07, 0x75, 0x6E, 0x69, 0x45, 0x30, 0x46, 0x30, 0x00, 0x00,
+    0x00, 0x01, 0x00, 0x01, 0xFF, 0xFF, 0x00, 0x0F,
 }};
 
 } // namespace FileSys::SystemArchive::SharedFontData

src/core/file_sys/system_archive/data/font_nintendo_extended.h

@@ -8,6 +8,6 @@
 
 namespace FileSys::SystemArchive::SharedFontData {
 
-extern const std::array<unsigned char, 2932> FONT_NINTENDO_EXTENDED;
+extern const std::array<unsigned char, 6024> FONT_NINTENDO_EXTENDED;
 
 } // namespace FileSys::SystemArchive::SharedFontData

src/core/frontend/applets/general_frontend.cpp

@@ -53,72 +53,4 @@ void DefaultPhotoViewerApplet::ShowAllPhotos(std::function<void()> finished) con
     finished();
 }
 
-ECommerceApplet::~ECommerceApplet() = default;
-
-DefaultECommerceApplet::~DefaultECommerceApplet() = default;
-
-void DefaultECommerceApplet::ShowApplicationInformation(
-    std::function<void()> finished, u64 title_id, std::optional<u128> user_id,
-    std::optional<bool> full_display, std::optional<std::string> extra_parameter) {
-    const auto value = user_id.value_or(u128{});
-    LOG_INFO(Service_AM,
-             "Application requested frontend show application information for EShop, "
-             "title_id={:016X}, user_id={:016X}{:016X}, full_display={}, extra_parameter={}",
-             title_id, value[1], value[0],
-             full_display.has_value() ? fmt::format("{}", *full_display) : "null",
-             extra_parameter.value_or("null"));
-    finished();
-}
-
-void DefaultECommerceApplet::ShowAddOnContentList(std::function<void()> finished, u64 title_id,
-                                                  std::optional<u128> user_id,
-                                                  std::optional<bool> full_display) {
-    const auto value = user_id.value_or(u128{});
-    LOG_INFO(Service_AM,
-             "Application requested frontend show add on content list for EShop, "
-             "title_id={:016X}, user_id={:016X}{:016X}, full_display={}",
-             title_id, value[1], value[0],
-             full_display.has_value() ? fmt::format("{}", *full_display) : "null");
-    finished();
-}
-
-void DefaultECommerceApplet::ShowSubscriptionList(std::function<void()> finished, u64 title_id,
-                                                  std::optional<u128> user_id) {
-    const auto value = user_id.value_or(u128{});
-    LOG_INFO(Service_AM,
-             "Application requested frontend show subscription list for EShop, title_id={:016X}, "
-             "user_id={:016X}{:016X}",
-             title_id, value[1], value[0]);
-    finished();
-}
-
-void DefaultECommerceApplet::ShowConsumableItemList(std::function<void()> finished, u64 title_id,
-                                                    std::optional<u128> user_id) {
-    const auto value = user_id.value_or(u128{});
-    LOG_INFO(
-        Service_AM,
-        "Application requested frontend show consumable item list for EShop, title_id={:016X}, "
-        "user_id={:016X}{:016X}",
-        title_id, value[1], value[0]);
-    finished();
-}
-
-void DefaultECommerceApplet::ShowShopHome(std::function<void()> finished, u128 user_id,
-                                          bool full_display) {
-    LOG_INFO(Service_AM,
-             "Application requested frontend show home menu for EShop, user_id={:016X}{:016X}, "
-             "full_display={}",
-             user_id[1], user_id[0], full_display);
-    finished();
-}
-
-void DefaultECommerceApplet::ShowSettings(std::function<void()> finished, u128 user_id,
-                                          bool full_display) {
-    LOG_INFO(Service_AM,
-             "Application requested frontend show settings menu for EShop, user_id={:016X}{:016X}, "
-             "full_display={}",
-             user_id[1], user_id[0], full_display);
-    finished();
-}
-
 } // namespace Core::Frontend

src/core/frontend/applets/general_frontend.h

@@ -58,55 +58,4 @@ public:
     void ShowAllPhotos(std::function<void()> finished) const override;
 };
 
-class ECommerceApplet {
-public:
-    virtual ~ECommerceApplet();
-
-    // Shows a page with application icons, description, name, and price.
-    virtual void ShowApplicationInformation(std::function<void()> finished, u64 title_id,
-                                            std::optional<u128> user_id = {},
-                                            std::optional<bool> full_display = {},
-                                            std::optional<std::string> extra_parameter = {}) = 0;
-
-    // Shows a page with all of the add on content available for a game, with name, description, and
-    // price.
-    virtual void ShowAddOnContentList(std::function<void()> finished, u64 title_id,
-                                      std::optional<u128> user_id = {},
-                                      std::optional<bool> full_display = {}) = 0;
-
-    // Shows a page with all of the subscriptions (recurring payments) for a game, with name,
-    // description, price, and renewal period.
-    virtual void ShowSubscriptionList(std::function<void()> finished, u64 title_id,
-                                      std::optional<u128> user_id = {}) = 0;
-
-    // Shows a page with a list of any additional game related purchasable items (DLC,
-    // subscriptions, etc) for a particular game, with name, description, type, and price.
-    virtual void ShowConsumableItemList(std::function<void()> finished, u64 title_id,
-                                        std::optional<u128> user_id = {}) = 0;
-
-    // Shows the home page of the shop.
-    virtual void ShowShopHome(std::function<void()> finished, u128 user_id, bool full_display) = 0;
-
-    // Shows the user settings page of the shop.
-    virtual void ShowSettings(std::function<void()> finished, u128 user_id, bool full_display) = 0;
-};
-
-class DefaultECommerceApplet : public ECommerceApplet {
-public:
-    ~DefaultECommerceApplet() override;
-
-    void ShowApplicationInformation(std::function<void()> finished, u64 title_id,
-                                    std::optional<u128> user_id, std::optional<bool> full_display,
-                                    std::optional<std::string> extra_parameter) override;
-    void ShowAddOnContentList(std::function<void()> finished, u64 title_id,
-                              std::optional<u128> user_id,
-                              std::optional<bool> full_display) override;
-    void ShowSubscriptionList(std::function<void()> finished, u64 title_id,
-                              std::optional<u128> user_id) override;
-    void ShowConsumableItemList(std::function<void()> finished, u64 title_id,
-                                std::optional<u128> user_id) override;
-    void ShowShopHome(std::function<void()> finished, u128 user_id, bool full_display) override;
-    void ShowSettings(std::function<void()> finished, u128 user_id, bool full_display) override;
-};
-
 } // namespace Core::Frontend

src/core/frontend/applets/web_browser.cpp

@@ -11,14 +11,22 @@ WebBrowserApplet::~WebBrowserApplet() = default;
 
 DefaultWebBrowserApplet::~DefaultWebBrowserApplet() = default;
 
-void DefaultWebBrowserApplet::OpenPageLocal(std::string_view filename,
-                                            std::function<void()> unpack_romfs_callback,
-                                            std::function<void()> finished_callback) {
-    LOG_INFO(Service_AM,
-             "(STUBBED) called - No suitable web browser implementation found to open website page "
-             "at '{}'!",
-             filename);
-    finished_callback();
+void DefaultWebBrowserApplet::OpenLocalWebPage(
+    std::string_view local_url, std::function<void()> extract_romfs_callback,
+    std::function<void(Service::AM::Applets::WebExitReason, std::string)> callback) const {
+    LOG_WARNING(Service_AM, "(STUBBED) called, backend requested to open local web page at {}",
+                local_url);
+
+    callback(Service::AM::Applets::WebExitReason::WindowClosed, "http://localhost/");
+}
+
+void DefaultWebBrowserApplet::OpenExternalWebPage(
+    std::string_view external_url,
+    std::function<void(Service::AM::Applets::WebExitReason, std::string)> callback) const {
+    LOG_WARNING(Service_AM, "(STUBBED) called, backend requested to open external web page at {}",
+                external_url);
+
+    callback(Service::AM::Applets::WebExitReason::WindowClosed, "http://localhost/");
 }
 
 } // namespace Core::Frontend

src/core/frontend/applets/web_browser.h

@@ -7,22 +7,34 @@
 #include <functional>
 #include <string_view>
 
+#include "core/hle/service/am/applets/web_types.h"
+
 namespace Core::Frontend {
 
 class WebBrowserApplet {
 public:
     virtual ~WebBrowserApplet();
 
-    virtual void OpenPageLocal(std::string_view url, std::function<void()> unpack_romfs_callback,
-                               std::function<void()> finished_callback) = 0;
+    virtual void OpenLocalWebPage(
+        std::string_view local_url, std::function<void()> extract_romfs_callback,
+        std::function<void(Service::AM::Applets::WebExitReason, std::string)> callback) const = 0;
+
+    virtual void OpenExternalWebPage(
+        std::string_view external_url,
+        std::function<void(Service::AM::Applets::WebExitReason, std::string)> callback) const = 0;
 };
 
 class DefaultWebBrowserApplet final : public WebBrowserApplet {
 public:
     ~DefaultWebBrowserApplet() override;
 
-    void OpenPageLocal(std::string_view url, std::function<void()> unpack_romfs_callback,
-                       std::function<void()> finished_callback) override;
+    void OpenLocalWebPage(std::string_view local_url, std::function<void()> extract_romfs_callback,
+                          std::function<void(Service::AM::Applets::WebExitReason, std::string)>
+                              callback) const override;
+
+    void OpenExternalWebPage(std::string_view external_url,
+                             std::function<void(Service::AM::Applets::WebExitReason, std::string)>
+                                 callback) const override;
 };
 
 } // namespace Core::Frontend

src/core/frontend/input_interpreter.cpp

@@ -0,0 +1,45 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/core.h"
+#include "core/frontend/input_interpreter.h"
+#include "core/hle/service/hid/controllers/npad.h"
+#include "core/hle/service/hid/hid.h"
+#include "core/hle/service/sm/sm.h"
+
+InputInterpreter::InputInterpreter(Core::System& system)
+    : npad{system.ServiceManager()
+               .GetService<Service::HID::Hid>("hid")
+               ->GetAppletResource()
+               ->GetController<Service::HID::Controller_NPad>(Service::HID::HidController::NPad)} {}
+
+InputInterpreter::~InputInterpreter() = default;
+
+void InputInterpreter::PollInput() {
+    const u32 button_state = npad.GetAndResetPressState();
+
+    previous_index = current_index;
+    current_index = (current_index + 1) % button_states.size();
+
+    button_states[current_index] = button_state;
+}
+
+bool InputInterpreter::IsButtonPressedOnce(HIDButton button) const {
+    const bool current_press =
+        (button_states[current_index] & (1U << static_cast<u8>(button))) != 0;
+    const bool previous_press =
+        (button_states[previous_index] & (1U << static_cast<u8>(button))) != 0;
+
+    return current_press && !previous_press;
+}
+
+bool InputInterpreter::IsButtonHeld(HIDButton button) const {
+    u32 held_buttons{button_states[0]};
+
+    for (std::size_t i = 1; i < button_states.size(); ++i) {
+        held_buttons &= button_states[i];
+    }
+
+    return (held_buttons & (1U << static_cast<u8>(button))) != 0;
+}

src/core/frontend/input_interpreter.h

@@ -0,0 +1,120 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::HID {
+class Controller_NPad;
+}
+
+enum class HIDButton : u8 {
+    A,
+    B,
+    X,
+    Y,
+    LStick,
+    RStick,
+    L,
+    R,
+    ZL,
+    ZR,
+    Plus,
+    Minus,
+
+    DLeft,
+    DUp,
+    DRight,
+    DDown,
+
+    LStickLeft,
+    LStickUp,
+    LStickRight,
+    LStickDown,
+
+    RStickLeft,
+    RStickUp,
+    RStickRight,
+    RStickDown,
+
+    LeftSL,
+    LeftSR,
+
+    RightSL,
+    RightSR,
+};
+
+/**
+ * The InputInterpreter class interfaces with HID to retrieve button press states.
+ * Input is intended to be polled every 50ms so that a button is considered to be
+ * held down after 400ms has elapsed since the initial button press and subsequent
+ * repeated presses occur every 50ms.
+ */
+class InputInterpreter {
+public:
+    explicit InputInterpreter(Core::System& system);
+    virtual ~InputInterpreter();
+
+    /// Gets a button state from HID and inserts it into the array of button states.
+    void PollInput();
+
+    /**
+     * The specified button is considered to be pressed once
+     * if it is currently pressed and not pressed previously.
+     *
+     * @param button The button to check.
+     *
+     * @returns True when the button is pressed once.
+     */
+    [[nodiscard]] bool IsButtonPressedOnce(HIDButton button) const;
+
+    /**
+     * Checks whether any of the buttons in the parameter list is pressed once.
+     *
+     * @tparam HIDButton The buttons to check.
+     *
+     * @returns True when at least one of the buttons is pressed once.
+     */
+    template <HIDButton... T>
+    [[nodiscard]] bool IsAnyButtonPressedOnce() {
+        return (IsButtonPressedOnce(T) || ...);
+    }
+
+    /**
+     * The specified button is considered to be held down if it is pressed in all 9 button states.
+     *
+     * @param button The button to check.
+     *
+     * @returns True when the button is held down.
+     */
+    [[nodiscard]] bool IsButtonHeld(HIDButton button) const;
+
+    /**
+     * Checks whether any of the buttons in the parameter list is held down.
+     *
+     * @tparam HIDButton The buttons to check.
+     *
+     * @returns True when at least one of the buttons is held down.
+     */
+    template <HIDButton... T>
+    [[nodiscard]] bool IsAnyButtonHeld() {
+        return (IsButtonHeld(T) || ...);
+    }
+
+private:
+    Service::HID::Controller_NPad& npad;
+
+    /// Stores 9 consecutive button states polled from HID.
+    std::array<u32, 9> button_states{};
+
+    std::size_t previous_index{};
+    std::size_t current_index{};
+};

src/core/hle/kernel/address_arbiter.cpp

@@ -1,316 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <algorithm>
-#include <vector>
-
-#include "common/assert.h"
-#include "common/common_types.h"
-#include "core/arm/exclusive_monitor.h"
-#include "core/core.h"
-#include "core/hle/kernel/address_arbiter.h"
-#include "core/hle/kernel/errors.h"
-#include "core/hle/kernel/handle_table.h"
-#include "core/hle/kernel/kernel.h"
-#include "core/hle/kernel/scheduler.h"
-#include "core/hle/kernel/thread.h"
-#include "core/hle/kernel/time_manager.h"
-#include "core/hle/result.h"
-#include "core/memory.h"
-
-namespace Kernel {
-
-// Wake up num_to_wake (or all) threads in a vector.
-void AddressArbiter::WakeThreads(const std::vector<std::shared_ptr<Thread>>& waiting_threads,
-                                 s32 num_to_wake) {
-    // Only process up to 'target' threads, unless 'target' is <= 0, in which case process
-    // them all.
-    std::size_t last = waiting_threads.size();
-    if (num_to_wake > 0) {
-        last = std::min(last, static_cast<std::size_t>(num_to_wake));
-    }
-
-    // Signal the waiting threads.
-    for (std::size_t i = 0; i < last; i++) {
-        waiting_threads[i]->SetSynchronizationResults(nullptr, RESULT_SUCCESS);
-        RemoveThread(waiting_threads[i]);
-        waiting_threads[i]->WaitForArbitration(false);
-        waiting_threads[i]->ResumeFromWait();
-    }
-}
-
-AddressArbiter::AddressArbiter(Core::System& system) : system{system} {}
-AddressArbiter::~AddressArbiter() = default;
-
-ResultCode AddressArbiter::SignalToAddress(VAddr address, SignalType type, s32 value,
-                                           s32 num_to_wake) {
-    switch (type) {
-    case SignalType::Signal:
-        return SignalToAddressOnly(address, num_to_wake);
-    case SignalType::IncrementAndSignalIfEqual:
-        return IncrementAndSignalToAddressIfEqual(address, value, num_to_wake);
-    case SignalType::ModifyByWaitingCountAndSignalIfEqual:
-        return ModifyByWaitingCountAndSignalToAddressIfEqual(address, value, num_to_wake);
-    default:
-        return ERR_INVALID_ENUM_VALUE;
-    }
-}
-
-ResultCode AddressArbiter::SignalToAddressOnly(VAddr address, s32 num_to_wake) {
-    SchedulerLock lock(system.Kernel());
-    const std::vector<std::shared_ptr<Thread>> waiting_threads =
-        GetThreadsWaitingOnAddress(address);
-    WakeThreads(waiting_threads, num_to_wake);
-    return RESULT_SUCCESS;
-}
-
-ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32 value,
-                                                              s32 num_to_wake) {
-    SchedulerLock lock(system.Kernel());
-    auto& memory = system.Memory();
-
-    // Ensure that we can write to the address.
-    if (!memory.IsValidVirtualAddress(address)) {
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    const std::size_t current_core = system.CurrentCoreIndex();
-    auto& monitor = system.Monitor();
-    u32 current_value;
-    do {
-        current_value = monitor.ExclusiveRead32(current_core, address);
-
-        if (current_value != static_cast<u32>(value)) {
-            return ERR_INVALID_STATE;
-        }
-        current_value++;
-    } while (!monitor.ExclusiveWrite32(current_core, address, current_value));
-
-    return SignalToAddressOnly(address, num_to_wake);
-}
-
-ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
-                                                                         s32 num_to_wake) {
-    SchedulerLock lock(system.Kernel());
-    auto& memory = system.Memory();
-
-    // Ensure that we can write to the address.
-    if (!memory.IsValidVirtualAddress(address)) {
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    // Get threads waiting on the address.
-    const std::vector<std::shared_ptr<Thread>> waiting_threads =
-        GetThreadsWaitingOnAddress(address);
-
-    const std::size_t current_core = system.CurrentCoreIndex();
-    auto& monitor = system.Monitor();
-    s32 updated_value;
-    do {
-        updated_value = monitor.ExclusiveRead32(current_core, address);
-
-        if (updated_value != value) {
-            return ERR_INVALID_STATE;
-        }
-        // Determine the modified value depending on the waiting count.
-        if (num_to_wake <= 0) {
-            if (waiting_threads.empty()) {
-                updated_value = value + 1;
-            } else {
-                updated_value = value - 1;
-            }
-        } else {
-            if (waiting_threads.empty()) {
-                updated_value = value + 1;
-            } else if (waiting_threads.size() <= static_cast<u32>(num_to_wake)) {
-                updated_value = value - 1;
-            } else {
-                updated_value = value;
-            }
-        }
-    } while (!monitor.ExclusiveWrite32(current_core, address, updated_value));
-
-    WakeThreads(waiting_threads, num_to_wake);
-    return RESULT_SUCCESS;
-}
-
-ResultCode AddressArbiter::WaitForAddress(VAddr address, ArbitrationType type, s32 value,
-                                          s64 timeout_ns) {
-    switch (type) {
-    case ArbitrationType::WaitIfLessThan:
-        return WaitForAddressIfLessThan(address, value, timeout_ns, false);
-    case ArbitrationType::DecrementAndWaitIfLessThan:
-        return WaitForAddressIfLessThan(address, value, timeout_ns, true);
-    case ArbitrationType::WaitIfEqual:
-        return WaitForAddressIfEqual(address, value, timeout_ns);
-    default:
-        return ERR_INVALID_ENUM_VALUE;
-    }
-}
-
-ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout,
-                                                    bool should_decrement) {
-    auto& memory = system.Memory();
-    auto& kernel = system.Kernel();
-    Thread* current_thread = system.CurrentScheduler().GetCurrentThread();
-
-    Handle event_handle = InvalidHandle;
-    {
-        SchedulerLockAndSleep lock(kernel, event_handle, current_thread, timeout);
-
-        if (current_thread->IsPendingTermination()) {
-            lock.CancelSleep();
-            return ERR_THREAD_TERMINATING;
-        }
-
-        // Ensure that we can read the address.
-        if (!memory.IsValidVirtualAddress(address)) {
-            lock.CancelSleep();
-            return ERR_INVALID_ADDRESS_STATE;
-        }
-
-        s32 current_value = static_cast<s32>(memory.Read32(address));
-        if (current_value >= value) {
-            lock.CancelSleep();
-            return ERR_INVALID_STATE;
-        }
-
-        current_thread->SetSynchronizationResults(nullptr, RESULT_TIMEOUT);
-
-        s32 decrement_value;
-
-        const std::size_t current_core = system.CurrentCoreIndex();
-        auto& monitor = system.Monitor();
-        do {
-            current_value = static_cast<s32>(monitor.ExclusiveRead32(current_core, address));
-            if (should_decrement) {
-                decrement_value = current_value - 1;
-            } else {
-                decrement_value = current_value;
-            }
-        } while (
-            !monitor.ExclusiveWrite32(current_core, address, static_cast<u32>(decrement_value)));
-
-        // Short-circuit without rescheduling, if timeout is zero.
-        if (timeout == 0) {
-            lock.CancelSleep();
-            return RESULT_TIMEOUT;
-        }
-
-        current_thread->SetArbiterWaitAddress(address);
-        InsertThread(SharedFrom(current_thread));
-        current_thread->SetStatus(ThreadStatus::WaitArb);
-        current_thread->WaitForArbitration(true);
-    }
-
-    if (event_handle != InvalidHandle) {
-        auto& time_manager = kernel.TimeManager();
-        time_manager.UnscheduleTimeEvent(event_handle);
-    }
-
-    {
-        SchedulerLock lock(kernel);
-        if (current_thread->IsWaitingForArbitration()) {
-            RemoveThread(SharedFrom(current_thread));
-            current_thread->WaitForArbitration(false);
-        }
-    }
-
-    return current_thread->GetSignalingResult();
-}
-
-ResultCode AddressArbiter::WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
-    auto& memory = system.Memory();
-    auto& kernel = system.Kernel();
-    Thread* current_thread = system.CurrentScheduler().GetCurrentThread();
-
-    Handle event_handle = InvalidHandle;
-    {
-        SchedulerLockAndSleep lock(kernel, event_handle, current_thread, timeout);
-
-        if (current_thread->IsPendingTermination()) {
-            lock.CancelSleep();
-            return ERR_THREAD_TERMINATING;
-        }
-
-        // Ensure that we can read the address.
-        if (!memory.IsValidVirtualAddress(address)) {
-            lock.CancelSleep();
-            return ERR_INVALID_ADDRESS_STATE;
-        }
-
-        s32 current_value = static_cast<s32>(memory.Read32(address));
-        if (current_value != value) {
-            lock.CancelSleep();
-            return ERR_INVALID_STATE;
-        }
-
-        // Short-circuit without rescheduling, if timeout is zero.
-        if (timeout == 0) {
-            lock.CancelSleep();
-            return RESULT_TIMEOUT;
-        }
-
-        current_thread->SetSynchronizationResults(nullptr, RESULT_TIMEOUT);
-        current_thread->SetArbiterWaitAddress(address);
-        InsertThread(SharedFrom(current_thread));
-        current_thread->SetStatus(ThreadStatus::WaitArb);
-        current_thread->WaitForArbitration(true);
-    }
-
-    if (event_handle != InvalidHandle) {
-        auto& time_manager = kernel.TimeManager();
-        time_manager.UnscheduleTimeEvent(event_handle);
-    }
-
-    {
-        SchedulerLock lock(kernel);
-        if (current_thread->IsWaitingForArbitration()) {
-            RemoveThread(SharedFrom(current_thread));
-            current_thread->WaitForArbitration(false);
-        }
-    }
-
-    return current_thread->GetSignalingResult();
-}
-
-void AddressArbiter::InsertThread(std::shared_ptr<Thread> thread) {
-    const VAddr arb_addr = thread->GetArbiterWaitAddress();
-    std::list<std::shared_ptr<Thread>>& thread_list = arb_threads[arb_addr];
-
-    const auto iter =
-        std::find_if(thread_list.cbegin(), thread_list.cend(), [&thread](const auto& entry) {
-            return entry->GetPriority() >= thread->GetPriority();
-        });
-
-    if (iter == thread_list.cend()) {
-        thread_list.push_back(std::move(thread));
-    } else {
-        thread_list.insert(iter, std::move(thread));
-    }
-}
-
-void AddressArbiter::RemoveThread(std::shared_ptr<Thread> thread) {
-    const VAddr arb_addr = thread->GetArbiterWaitAddress();
-    std::list<std::shared_ptr<Thread>>& thread_list = arb_threads[arb_addr];
-
-    const auto iter = std::find_if(thread_list.cbegin(), thread_list.cend(),
-                                   [&thread](const auto& entry) { return thread == entry; });
-
-    if (iter != thread_list.cend()) {
-        thread_list.erase(iter);
-    }
-}
-
-std::vector<std::shared_ptr<Thread>> AddressArbiter::GetThreadsWaitingOnAddress(
-    VAddr address) const {
-    const auto iter = arb_threads.find(address);
-    if (iter == arb_threads.cend()) {
-        return {};
-    }
-
-    const std::list<std::shared_ptr<Thread>>& thread_list = iter->second;
-    return {thread_list.cbegin(), thread_list.cend()};
-}
-} // namespace Kernel

src/core/hle/kernel/address_arbiter.h

@@ -1,91 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <list>
-#include <memory>
-#include <unordered_map>
-#include <vector>
-
-#include "common/common_types.h"
-
-union ResultCode;
-
-namespace Core {
-class System;
-}
-
-namespace Kernel {
-
-class Thread;
-
-class AddressArbiter {
-public:
-    enum class ArbitrationType {
-        WaitIfLessThan = 0,
-        DecrementAndWaitIfLessThan = 1,
-        WaitIfEqual = 2,
-    };
-
-    enum class SignalType {
-        Signal = 0,
-        IncrementAndSignalIfEqual = 1,
-        ModifyByWaitingCountAndSignalIfEqual = 2,
-    };
-
-    explicit AddressArbiter(Core::System& system);
-    ~AddressArbiter();
-
-    AddressArbiter(const AddressArbiter&) = delete;
-    AddressArbiter& operator=(const AddressArbiter&) = delete;
-
-    AddressArbiter(AddressArbiter&&) = default;
-    AddressArbiter& operator=(AddressArbiter&&) = delete;
-
-    /// Signals an address being waited on with a particular signaling type.
-    ResultCode SignalToAddress(VAddr address, SignalType type, s32 value, s32 num_to_wake);
-
-    /// Waits on an address with a particular arbitration type.
-    ResultCode WaitForAddress(VAddr address, ArbitrationType type, s32 value, s64 timeout_ns);
-
-private:
-    /// Signals an address being waited on.
-    ResultCode SignalToAddressOnly(VAddr address, s32 num_to_wake);
-
-    /// Signals an address being waited on and increments its value if equal to the value argument.
-    ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
-
-    /// Signals an address being waited on and modifies its value based on waiting thread count if
-    /// equal to the value argument.
-    ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
-                                                             s32 num_to_wake);
-
-    /// Waits on an address if the value passed is less than the argument value,
-    /// optionally decrementing.
-    ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout,
-                                        bool should_decrement);
-
-    /// Waits on an address if the value passed is equal to the argument value.
-    ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout);
-
-    /// Wake up num_to_wake (or all) threads in a vector.
-    void WakeThreads(const std::vector<std::shared_ptr<Thread>>& waiting_threads, s32 num_to_wake);
-
-    /// Insert a thread into the address arbiter container
-    void InsertThread(std::shared_ptr<Thread> thread);
-
-    /// Removes a thread from the address arbiter container
-    void RemoveThread(std::shared_ptr<Thread> thread);
-
-    // Gets the threads waiting on an address.
-    std::vector<std::shared_ptr<Thread>> GetThreadsWaitingOnAddress(VAddr address) const;
-
-    /// List of threads waiting for a address arbiter
-    std::unordered_map<VAddr, std::list<std::shared_ptr<Thread>>> arb_threads;
-
-    Core::System& system;
-};
-
-} // namespace Kernel

src/core/hle/kernel/client_port.cpp

@@ -33,9 +33,6 @@ ResultVal<std::shared_ptr<ClientSession>> ClientPort::Connect() {
         server_port->AppendPendingSession(std::move(server));
     }
 
-    // Wake the threads waiting on the ServerPort
-    server_port->Signal();
-
     return MakeResult(std::move(client));
 }
 

src/core/hle/kernel/client_session.cpp

@@ -12,7 +12,7 @@
 
 namespace Kernel {
 
-ClientSession::ClientSession(KernelCore& kernel) : SynchronizationObject{kernel} {}
+ClientSession::ClientSession(KernelCore& kernel) : KSynchronizationObject{kernel} {}
 
 ClientSession::~ClientSession() {
     // This destructor will be called automatically when the last ClientSession handle is closed by
@@ -22,15 +22,6 @@ ClientSession::~ClientSession() {
     }
 }
 
-bool ClientSession::ShouldWait(const Thread* thread) const {
-    UNIMPLEMENTED();
-    return {};
-}
-
-void ClientSession::Acquire(Thread* thread) {
-    UNIMPLEMENTED();
-}
-
 bool ClientSession::IsSignaled() const {
     UNIMPLEMENTED();
     return true;

src/core/hle/kernel/client_session.h

@@ -7,7 +7,7 @@
 #include <memory>
 #include <string>
 
-#include "core/hle/kernel/synchronization_object.h"
+#include "core/hle/kernel/k_synchronization_object.h"
 #include "core/hle/result.h"
 
 union ResultCode;
@@ -26,7 +26,7 @@ class KernelCore;
 class Session;
 class Thread;
 
-class ClientSession final : public SynchronizationObject {
+class ClientSession final : public KSynchronizationObject {
 public:
     explicit ClientSession(KernelCore& kernel);
     ~ClientSession() override;
@@ -49,10 +49,6 @@ public:
     ResultCode SendSyncRequest(std::shared_ptr<Thread> thread, Core::Memory::Memory& memory,
                                Core::Timing::CoreTiming& core_timing);
 
-    bool ShouldWait(const Thread* thread) const override;
-
-    void Acquire(Thread* thread) override;
-
     bool IsSignaled() const override;
 
 private:

src/core/hle/kernel/errors.h

@@ -13,12 +13,14 @@ namespace Kernel {
 constexpr ResultCode ERR_MAX_CONNECTIONS_REACHED{ErrorModule::Kernel, 7};
 constexpr ResultCode ERR_INVALID_CAPABILITY_DESCRIPTOR{ErrorModule::Kernel, 14};
 constexpr ResultCode ERR_THREAD_TERMINATING{ErrorModule::Kernel, 59};
+constexpr ResultCode ERR_TERMINATION_REQUESTED{ErrorModule::Kernel, 59};
 constexpr ResultCode ERR_INVALID_SIZE{ErrorModule::Kernel, 101};
 constexpr ResultCode ERR_INVALID_ADDRESS{ErrorModule::Kernel, 102};
 constexpr ResultCode ERR_OUT_OF_RESOURCES{ErrorModule::Kernel, 103};
 constexpr ResultCode ERR_OUT_OF_MEMORY{ErrorModule::Kernel, 104};
 constexpr ResultCode ERR_HANDLE_TABLE_FULL{ErrorModule::Kernel, 105};
 constexpr ResultCode ERR_INVALID_ADDRESS_STATE{ErrorModule::Kernel, 106};
+constexpr ResultCode ERR_INVALID_CURRENT_MEMORY{ErrorModule::Kernel, 106};
 constexpr ResultCode ERR_INVALID_MEMORY_PERMISSIONS{ErrorModule::Kernel, 108};
 constexpr ResultCode ERR_INVALID_MEMORY_RANGE{ErrorModule::Kernel, 110};
 constexpr ResultCode ERR_INVALID_PROCESSOR_ID{ErrorModule::Kernel, 113};
@@ -28,6 +30,7 @@ constexpr ResultCode ERR_INVALID_POINTER{ErrorModule::Kernel, 115};
 constexpr ResultCode ERR_INVALID_COMBINATION{ErrorModule::Kernel, 116};
 constexpr ResultCode RESULT_TIMEOUT{ErrorModule::Kernel, 117};
 constexpr ResultCode ERR_SYNCHRONIZATION_CANCELED{ErrorModule::Kernel, 118};
+constexpr ResultCode ERR_CANCELLED{ErrorModule::Kernel, 118};
 constexpr ResultCode ERR_OUT_OF_RANGE{ErrorModule::Kernel, 119};
 constexpr ResultCode ERR_INVALID_ENUM_VALUE{ErrorModule::Kernel, 120};
 constexpr ResultCode ERR_NOT_FOUND{ErrorModule::Kernel, 121};

src/core/hle/kernel/global_scheduler_context.cpp

@@ -0,0 +1,52 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <mutex>
+
+#include "common/assert.h"
+#include "core/core.h"
+#include "core/hle/kernel/global_scheduler_context.h"
+#include "core/hle/kernel/k_scheduler.h"
+#include "core/hle/kernel/kernel.h"
+
+namespace Kernel {
+
+GlobalSchedulerContext::GlobalSchedulerContext(KernelCore& kernel)
+    : kernel{kernel}, scheduler_lock{kernel} {}
+
+GlobalSchedulerContext::~GlobalSchedulerContext() = default;
+
+void GlobalSchedulerContext::AddThread(std::shared_ptr<Thread> thread) {
+    std::scoped_lock lock{global_list_guard};
+    thread_list.push_back(std::move(thread));
+}
+
+void GlobalSchedulerContext::RemoveThread(std::shared_ptr<Thread> thread) {
+    std::scoped_lock lock{global_list_guard};
+    thread_list.erase(std::remove(thread_list.begin(), thread_list.end(), thread),
+                      thread_list.end());
+}
+
+void GlobalSchedulerContext::PreemptThreads() {
+    // The priority levels at which the global scheduler preempts threads every 10 ms. They are
+    // ordered from Core 0 to Core 3.
+    static constexpr std::array<u32, Core::Hardware::NUM_CPU_CORES> preemption_priorities{
+        59,
+        59,
+        59,
+        63,
+    };
+
+    ASSERT(IsLocked());
+    for (u32 core_id = 0; core_id < Core::Hardware::NUM_CPU_CORES; core_id++) {
+        const u32 priority = preemption_priorities[core_id];
+        kernel.Scheduler(core_id).RotateScheduledQueue(core_id, priority);
+    }
+}
+
+bool GlobalSchedulerContext::IsLocked() const {
+    return scheduler_lock.IsLockedByCurrentThread();
+}
+
+} // namespace Kernel

src/core/hle/kernel/global_scheduler_context.h

@@ -0,0 +1,81 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <atomic>
+#include <vector>
+
+#include "common/common_types.h"
+#include "common/spin_lock.h"
+#include "core/hardware_properties.h"
+#include "core/hle/kernel/k_priority_queue.h"
+#include "core/hle/kernel/k_scheduler_lock.h"
+#include "core/hle/kernel/thread.h"
+
+namespace Kernel {
+
+class KernelCore;
+class SchedulerLock;
+
+using KSchedulerPriorityQueue =
+    KPriorityQueue<Thread, Core::Hardware::NUM_CPU_CORES, THREADPRIO_LOWEST, THREADPRIO_HIGHEST>;
+constexpr s32 HighestCoreMigrationAllowedPriority = 2;
+
+class GlobalSchedulerContext final {
+    friend class KScheduler;
+
+public:
+    using LockType = KAbstractSchedulerLock<KScheduler>;
+
+    explicit GlobalSchedulerContext(KernelCore& kernel);
+    ~GlobalSchedulerContext();
+
+    /// Adds a new thread to the scheduler
+    void AddThread(std::shared_ptr<Thread> thread);
+
+    /// Removes a thread from the scheduler
+    void RemoveThread(std::shared_ptr<Thread> thread);
+
+    /// Returns a list of all threads managed by the scheduler
+    [[nodiscard]] const std::vector<std::shared_ptr<Thread>>& GetThreadList() const {
+        return thread_list;
+    }
+
+    /**
+     * Rotates the scheduling queues of threads at a preemption priority and then does
+     * some core rebalancing. Preemption priorities can be found in the array
+     * 'preemption_priorities'.
+     *
+     * @note This operation happens every 10ms.
+     */
+    void PreemptThreads();
+
+    /// Returns true if the global scheduler lock is acquired
+    bool IsLocked() const;
+
+    [[nodiscard]] LockType& SchedulerLock() {
+        return scheduler_lock;
+    }
+
+    [[nodiscard]] const LockType& SchedulerLock() const {
+        return scheduler_lock;
+    }
+
+private:
+    friend class KScopedSchedulerLock;
+    friend class KScopedSchedulerLockAndSleep;
+
+    KernelCore& kernel;
+
+    std::atomic_bool scheduler_update_needed{};
+    KSchedulerPriorityQueue priority_queue;
+    LockType scheduler_lock;
+
+    /// Lists all thread ids that aren't deleted/etc.
+    std::vector<std::shared_ptr<Thread>> thread_list;
+    Common::SpinLock global_list_guard{};
+};
+
+} // namespace Kernel

src/core/hle/kernel/handle_table.cpp

@@ -8,9 +8,9 @@
 #include "core/core.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/handle_table.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/thread.h"
 
 namespace Kernel {
@@ -105,7 +105,7 @@ bool HandleTable::IsValid(Handle handle) const {
 
 std::shared_ptr<Object> HandleTable::GetGeneric(Handle handle) const {
     if (handle == CurrentThread) {
-        return SharedFrom(kernel.CurrentScheduler().GetCurrentThread());
+        return SharedFrom(kernel.CurrentScheduler()->GetCurrentThread());
     } else if (handle == CurrentProcess) {
         return SharedFrom(kernel.CurrentProcess());
     }

src/core/hle/kernel/hle_ipc.cpp

@@ -17,11 +17,12 @@
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/handle_table.h"
 #include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/k_scheduler.h"
+#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/readable_event.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/server_session.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/time_manager.h"
@@ -45,44 +46,6 @@ void SessionRequestHandler::ClientDisconnected(
     boost::range::remove_erase(connected_sessions, server_session);
 }
 
-std::shared_ptr<WritableEvent> HLERequestContext::SleepClientThread(
-    const std::string& reason, u64 timeout, WakeupCallback&& callback,
-    std::shared_ptr<WritableEvent> writable_event) {
-    // Put the client thread to sleep until the wait event is signaled or the timeout expires.
-
-    if (!writable_event) {
-        // Create event if not provided
-        const auto pair = WritableEvent::CreateEventPair(kernel, "HLE Pause Event: " + reason);
-        writable_event = pair.writable;
-    }
-
-    {
-        Handle event_handle = InvalidHandle;
-        SchedulerLockAndSleep lock(kernel, event_handle, thread.get(), timeout);
-        thread->SetHLECallback(
-            [context = *this, callback](std::shared_ptr<Thread> thread) mutable -> bool {
-                ThreadWakeupReason reason = thread->GetSignalingResult() == RESULT_TIMEOUT
-                                                ? ThreadWakeupReason::Timeout
-                                                : ThreadWakeupReason::Signal;
-                callback(thread, context, reason);
-                context.WriteToOutgoingCommandBuffer(*thread);
-                return true;
-            });
-        const auto readable_event{writable_event->GetReadableEvent()};
-        writable_event->Clear();
-        thread->SetHLESyncObject(readable_event.get());
-        thread->SetStatus(ThreadStatus::WaitHLEEvent);
-        thread->SetSynchronizationResults(nullptr, RESULT_TIMEOUT);
-        readable_event->AddWaitingThread(thread);
-        lock.Release();
-        thread->SetHLETimeEvent(event_handle);
-    }
-
-    is_thread_waiting = true;
-
-    return writable_event;
-}
-
 HLERequestContext::HLERequestContext(KernelCore& kernel, Core::Memory::Memory& memory,
                                      std::shared_ptr<ServerSession> server_session,
                                      std::shared_ptr<Thread> thread)

src/core/hle/kernel/hle_ipc.h

@@ -129,23 +129,6 @@ public:
     using WakeupCallback = std::function<void(
         std::shared_ptr<Thread> thread, HLERequestContext& context, ThreadWakeupReason reason)>;
 
-    /**
-     * Puts the specified guest thread to sleep until the returned event is signaled or until the
-     * specified timeout expires.
-     * @param reason Reason for pausing the thread, to be used for debugging purposes.
-     * @param timeout Timeout in nanoseconds after which the thread will be awoken and the callback
-     * invoked with a Timeout reason.
-     * @param callback Callback to be invoked when the thread is resumed. This callback must write
-     * the entire command response once again, regardless of the state of it before this function
-     * was called.
-     * @param writable_event Event to use to wake up the thread. If unspecified, an event will be
-     * created.
-     * @returns Event that when signaled will resume the thread and call the callback function.
-     */
-    std::shared_ptr<WritableEvent> SleepClientThread(
-        const std::string& reason, u64 timeout, WakeupCallback&& callback,
-        std::shared_ptr<WritableEvent> writable_event = nullptr);
-
     /// Populates this context with data from the requesting process/thread.
     ResultCode PopulateFromIncomingCommandBuffer(const HandleTable& handle_table,
                                                  u32_le* src_cmdbuf);

src/core/hle/kernel/k_address_arbiter.cpp

@@ -0,0 +1,367 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/arm/exclusive_monitor.h"
+#include "core/core.h"
+#include "core/hle/kernel/k_address_arbiter.h"
+#include "core/hle/kernel/k_scheduler.h"
+#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/svc_results.h"
+#include "core/hle/kernel/thread.h"
+#include "core/hle/kernel/time_manager.h"
+#include "core/memory.h"
+
+namespace Kernel {
+
+KAddressArbiter::KAddressArbiter(Core::System& system_)
+    : system{system_}, kernel{system.Kernel()} {}
+KAddressArbiter::~KAddressArbiter() = default;
+
+namespace {
+
+bool ReadFromUser(Core::System& system, s32* out, VAddr address) {
+    *out = system.Memory().Read32(address);
+    return true;
+}
+
+bool DecrementIfLessThan(Core::System& system, s32* out, VAddr address, s32 value) {
+    auto& monitor = system.Monitor();
+    const auto current_core = system.CurrentCoreIndex();
+
+    // TODO(bunnei): We should disable interrupts here via KScopedInterruptDisable.
+    // TODO(bunnei): We should call CanAccessAtomic(..) here.
+
+    // Load the value from the address.
+    const s32 current_value = static_cast<s32>(monitor.ExclusiveRead32(current_core, address));
+
+    // Compare it to the desired one.
+    if (current_value < value) {
+        // If less than, we want to try to decrement.
+        const s32 decrement_value = current_value - 1;
+
+        // Decrement and try to store.
+        if (!monitor.ExclusiveWrite32(current_core, address, static_cast<u32>(decrement_value))) {
+            // If we failed to store, try again.
+            DecrementIfLessThan(system, out, address, value);
+        }
+    } else {
+        // Otherwise, clear our exclusive hold and finish
+        monitor.ClearExclusive();
+    }
+
+    // We're done.
+    *out = current_value;
+    return true;
+}
+
+bool UpdateIfEqual(Core::System& system, s32* out, VAddr address, s32 value, s32 new_value) {
+    auto& monitor = system.Monitor();
+    const auto current_core = system.CurrentCoreIndex();
+
+    // TODO(bunnei): We should disable interrupts here via KScopedInterruptDisable.
+    // TODO(bunnei): We should call CanAccessAtomic(..) here.
+
+    // Load the value from the address.
+    const s32 current_value = static_cast<s32>(monitor.ExclusiveRead32(current_core, address));
+
+    // Compare it to the desired one.
+    if (current_value == value) {
+        // If equal, we want to try to write the new value.
+
+        // Try to store.
+        if (!monitor.ExclusiveWrite32(current_core, address, static_cast<u32>(new_value))) {
+            // If we failed to store, try again.
+            UpdateIfEqual(system, out, address, value, new_value);
+        }
+    } else {
+        // Otherwise, clear our exclusive hold and finish.
+        monitor.ClearExclusive();
+    }
+
+    // We're done.
+    *out = current_value;
+    return true;
+}
+
+} // namespace
+
+ResultCode KAddressArbiter::Signal(VAddr addr, s32 count) {
+    // Perform signaling.
+    s32 num_waiters{};
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        auto it = thread_tree.nfind_light({addr, -1});
+        while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
+               (it->GetAddressArbiterKey() == addr)) {
+            Thread* target_thread = std::addressof(*it);
+            target_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
+
+            ASSERT(target_thread->IsWaitingForAddressArbiter());
+            target_thread->Wakeup();
+
+            it = thread_tree.erase(it);
+            target_thread->ClearAddressArbiter();
+            ++num_waiters;
+        }
+    }
+    return RESULT_SUCCESS;
+}
+
+ResultCode KAddressArbiter::SignalAndIncrementIfEqual(VAddr addr, s32 value, s32 count) {
+    // Perform signaling.
+    s32 num_waiters{};
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        // Check the userspace value.
+        s32 user_value{};
+        R_UNLESS(UpdateIfEqual(system, std::addressof(user_value), addr, value, value + 1),
+                 Svc::ResultInvalidCurrentMemory);
+        R_UNLESS(user_value == value, Svc::ResultInvalidState);
+
+        auto it = thread_tree.nfind_light({addr, -1});
+        while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
+               (it->GetAddressArbiterKey() == addr)) {
+            Thread* target_thread = std::addressof(*it);
+            target_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
+
+            ASSERT(target_thread->IsWaitingForAddressArbiter());
+            target_thread->Wakeup();
+
+            it = thread_tree.erase(it);
+            target_thread->ClearAddressArbiter();
+            ++num_waiters;
+        }
+    }
+    return RESULT_SUCCESS;
+}
+
+ResultCode KAddressArbiter::SignalAndModifyByWaitingCountIfEqual(VAddr addr, s32 value, s32 count) {
+    // Perform signaling.
+    s32 num_waiters{};
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        auto it = thread_tree.nfind_light({addr, -1});
+        // Determine the updated value.
+        s32 new_value{};
+        if (/*GetTargetFirmware() >= TargetFirmware_7_0_0*/ true) {
+            if (count <= 0) {
+                if ((it != thread_tree.end()) && (it->GetAddressArbiterKey() == addr)) {
+                    new_value = value - 2;
+                } else {
+                    new_value = value + 1;
+                }
+            } else {
+                if ((it != thread_tree.end()) && (it->GetAddressArbiterKey() == addr)) {
+                    auto tmp_it = it;
+                    s32 tmp_num_waiters{};
+                    while ((++tmp_it != thread_tree.end()) &&
+                           (tmp_it->GetAddressArbiterKey() == addr)) {
+                        if ((tmp_num_waiters++) >= count) {
+                            break;
+                        }
+                    }
+
+                    if (tmp_num_waiters < count) {
+                        new_value = value - 1;
+                    } else {
+                        new_value = value;
+                    }
+                } else {
+                    new_value = value + 1;
+                }
+            }
+        } else {
+            if (count <= 0) {
+                if ((it != thread_tree.end()) && (it->GetAddressArbiterKey() == addr)) {
+                    new_value = value - 1;
+                } else {
+                    new_value = value + 1;
+                }
+            } else {
+                auto tmp_it = it;
+                s32 tmp_num_waiters{};
+                while ((tmp_it != thread_tree.end()) && (tmp_it->GetAddressArbiterKey() == addr) &&
+                       (tmp_num_waiters < count + 1)) {
+                    ++tmp_num_waiters;
+                    ++tmp_it;
+                }
+
+                if (tmp_num_waiters == 0) {
+                    new_value = value + 1;
+                } else if (tmp_num_waiters <= count) {
+                    new_value = value - 1;
+                } else {
+                    new_value = value;
+                }
+            }
+        }
+
+        // Check the userspace value.
+        s32 user_value{};
+        bool succeeded{};
+        if (value != new_value) {
+            succeeded = UpdateIfEqual(system, std::addressof(user_value), addr, value, new_value);
+        } else {
+            succeeded = ReadFromUser(system, std::addressof(user_value), addr);
+        }
+
+        R_UNLESS(succeeded, Svc::ResultInvalidCurrentMemory);
+        R_UNLESS(user_value == value, Svc::ResultInvalidState);
+
+        while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
+               (it->GetAddressArbiterKey() == addr)) {
+            Thread* target_thread = std::addressof(*it);
+            target_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
+
+            ASSERT(target_thread->IsWaitingForAddressArbiter());
+            target_thread->Wakeup();
+
+            it = thread_tree.erase(it);
+            target_thread->ClearAddressArbiter();
+            ++num_waiters;
+        }
+    }
+    return RESULT_SUCCESS;
+}
+
+ResultCode KAddressArbiter::WaitIfLessThan(VAddr addr, s32 value, bool decrement, s64 timeout) {
+    // Prepare to wait.
+    Thread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
+    Handle timer = InvalidHandle;
+
+    {
+        KScopedSchedulerLockAndSleep slp(kernel, timer, cur_thread, timeout);
+
+        // Check that the thread isn't terminating.
+        if (cur_thread->IsTerminationRequested()) {
+            slp.CancelSleep();
+            return Svc::ResultTerminationRequested;
+        }
+
+        // Set the synced object.
+        cur_thread->SetSyncedObject(nullptr, Svc::ResultTimedOut);
+
+        // Read the value from userspace.
+        s32 user_value{};
+        bool succeeded{};
+        if (decrement) {
+            succeeded = DecrementIfLessThan(system, std::addressof(user_value), addr, value);
+        } else {
+            succeeded = ReadFromUser(system, std::addressof(user_value), addr);
+        }
+
+        if (!succeeded) {
+            slp.CancelSleep();
+            return Svc::ResultInvalidCurrentMemory;
+        }
+
+        // Check that the value is less than the specified one.
+        if (user_value >= value) {
+            slp.CancelSleep();
+            return Svc::ResultInvalidState;
+        }
+
+        // Check that the timeout is non-zero.
+        if (timeout == 0) {
+            slp.CancelSleep();
+            return Svc::ResultTimedOut;
+        }
+
+        // Set the arbiter.
+        cur_thread->SetAddressArbiter(std::addressof(thread_tree), addr);
+        thread_tree.insert(*cur_thread);
+        cur_thread->SetState(ThreadState::Waiting);
+        cur_thread->SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::Arbitration);
+    }
+
+    // Cancel the timer wait.
+    if (timer != InvalidHandle) {
+        auto& time_manager = kernel.TimeManager();
+        time_manager.UnscheduleTimeEvent(timer);
+    }
+
+    // Remove from the address arbiter.
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        if (cur_thread->IsWaitingForAddressArbiter()) {
+            thread_tree.erase(thread_tree.iterator_to(*cur_thread));
+            cur_thread->ClearAddressArbiter();
+        }
+    }
+
+    // Get the result.
+    KSynchronizationObject* dummy{};
+    return cur_thread->GetWaitResult(std::addressof(dummy));
+}
+
+ResultCode KAddressArbiter::WaitIfEqual(VAddr addr, s32 value, s64 timeout) {
+    // Prepare to wait.
+    Thread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
+    Handle timer = InvalidHandle;
+
+    {
+        KScopedSchedulerLockAndSleep slp(kernel, timer, cur_thread, timeout);
+
+        // Check that the thread isn't terminating.
+        if (cur_thread->IsTerminationRequested()) {
+            slp.CancelSleep();
+            return Svc::ResultTerminationRequested;
+        }
+
+        // Set the synced object.
+        cur_thread->SetSyncedObject(nullptr, Svc::ResultTimedOut);
+
+        // Read the value from userspace.
+        s32 user_value{};
+        if (!ReadFromUser(system, std::addressof(user_value), addr)) {
+            slp.CancelSleep();
+            return Svc::ResultInvalidCurrentMemory;
+        }
+
+        // Check that the value is equal.
+        if (value != user_value) {
+            slp.CancelSleep();
+            return Svc::ResultInvalidState;
+        }
+
+        // Check that the timeout is non-zero.
+        if (timeout == 0) {
+            slp.CancelSleep();
+            return Svc::ResultTimedOut;
+        }
+
+        // Set the arbiter.
+        cur_thread->SetAddressArbiter(std::addressof(thread_tree), addr);
+        thread_tree.insert(*cur_thread);
+        cur_thread->SetState(ThreadState::Waiting);
+        cur_thread->SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::Arbitration);
+    }
+
+    // Cancel the timer wait.
+    if (timer != InvalidHandle) {
+        auto& time_manager = kernel.TimeManager();
+        time_manager.UnscheduleTimeEvent(timer);
+    }
+
+    // Remove from the address arbiter.
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        if (cur_thread->IsWaitingForAddressArbiter()) {
+            thread_tree.erase(thread_tree.iterator_to(*cur_thread));
+            cur_thread->ClearAddressArbiter();
+        }
+    }
+
+    // Get the result.
+    KSynchronizationObject* dummy{};
+    return cur_thread->GetWaitResult(std::addressof(dummy));
+}
+
+} // namespace Kernel

src/core/hle/kernel/k_address_arbiter.h

@@ -0,0 +1,70 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/k_condition_variable.h"
+#include "core/hle/kernel/svc_types.h"
+
+union ResultCode;
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+
+class KernelCore;
+
+class KAddressArbiter {
+public:
+    using ThreadTree = KConditionVariable::ThreadTree;
+
+    explicit KAddressArbiter(Core::System& system_);
+    ~KAddressArbiter();
+
+    [[nodiscard]] ResultCode SignalToAddress(VAddr addr, Svc::SignalType type, s32 value,
+                                             s32 count) {
+        switch (type) {
+        case Svc::SignalType::Signal:
+            return Signal(addr, count);
+        case Svc::SignalType::SignalAndIncrementIfEqual:
+            return SignalAndIncrementIfEqual(addr, value, count);
+        case Svc::SignalType::SignalAndModifyByWaitingCountIfEqual:
+            return SignalAndModifyByWaitingCountIfEqual(addr, value, count);
+        }
+        UNREACHABLE();
+        return RESULT_UNKNOWN;
+    }
+
+    [[nodiscard]] ResultCode WaitForAddress(VAddr addr, Svc::ArbitrationType type, s32 value,
+                                            s64 timeout) {
+        switch (type) {
+        case Svc::ArbitrationType::WaitIfLessThan:
+            return WaitIfLessThan(addr, value, false, timeout);
+        case Svc::ArbitrationType::DecrementAndWaitIfLessThan:
+            return WaitIfLessThan(addr, value, true, timeout);
+        case Svc::ArbitrationType::WaitIfEqual:
+            return WaitIfEqual(addr, value, timeout);
+        }
+        UNREACHABLE();
+        return RESULT_UNKNOWN;
+    }
+
+private:
+    [[nodiscard]] ResultCode Signal(VAddr addr, s32 count);
+    [[nodiscard]] ResultCode SignalAndIncrementIfEqual(VAddr addr, s32 value, s32 count);
+    [[nodiscard]] ResultCode SignalAndModifyByWaitingCountIfEqual(VAddr addr, s32 value, s32 count);
+    [[nodiscard]] ResultCode WaitIfLessThan(VAddr addr, s32 value, bool decrement, s64 timeout);
+    [[nodiscard]] ResultCode WaitIfEqual(VAddr addr, s32 value, s64 timeout);
+
+    ThreadTree thread_tree;
+
+    Core::System& system;
+    KernelCore& kernel;
+};
+
+} // namespace Kernel

src/core/hle/kernel/k_affinity_mask.h

@@ -0,0 +1,58 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/hardware_properties.h"
+
+namespace Kernel {
+
+class KAffinityMask {
+public:
+    constexpr KAffinityMask() = default;
+
+    [[nodiscard]] constexpr u64 GetAffinityMask() const {
+        return this->mask;
+    }
+
+    constexpr void SetAffinityMask(u64 new_mask) {
+        ASSERT((new_mask & ~AllowedAffinityMask) == 0);
+        this->mask = new_mask;
+    }
+
+    [[nodiscard]] constexpr bool GetAffinity(s32 core) const {
+        return this->mask & GetCoreBit(core);
+    }
+
+    constexpr void SetAffinity(s32 core, bool set) {
+        ASSERT(0 <= core && core < static_cast<s32>(Core::Hardware::NUM_CPU_CORES));
+
+        if (set) {
+            this->mask |= GetCoreBit(core);
+        } else {
+            this->mask &= ~GetCoreBit(core);
+        }
+    }
+
+    constexpr void SetAll() {
+        this->mask = AllowedAffinityMask;
+    }
+
+private:
+    [[nodiscard]] static constexpr u64 GetCoreBit(s32 core) {
+        ASSERT(0 <= core && core < static_cast<s32>(Core::Hardware::NUM_CPU_CORES));
+        return (1ULL << core);
+    }
+
+    static constexpr u64 AllowedAffinityMask = (1ULL << Core::Hardware::NUM_CPU_CORES) - 1;
+
+    u64 mask{};
+};
+
+} // namespace Kernel

src/core/hle/kernel/k_condition_variable.cpp

@@ -0,0 +1,349 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <vector>
+
+#include "core/arm/exclusive_monitor.h"
+#include "core/core.h"
+#include "core/hle/kernel/k_condition_variable.h"
+#include "core/hle/kernel/k_scheduler.h"
+#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
+#include "core/hle/kernel/k_synchronization_object.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/kernel/svc_common.h"
+#include "core/hle/kernel/svc_results.h"
+#include "core/hle/kernel/thread.h"
+#include "core/memory.h"
+
+namespace Kernel {
+
+namespace {
+
+bool ReadFromUser(Core::System& system, u32* out, VAddr address) {
+    *out = system.Memory().Read32(address);
+    return true;
+}
+
+bool WriteToUser(Core::System& system, VAddr address, const u32* p) {
+    system.Memory().Write32(address, *p);
+    return true;
+}
+
+bool UpdateLockAtomic(Core::System& system, u32* out, VAddr address, u32 if_zero,
+                      u32 new_orr_mask) {
+    auto& monitor = system.Monitor();
+    const auto current_core = system.CurrentCoreIndex();
+
+    // Load the value from the address.
+    const auto expected = monitor.ExclusiveRead32(current_core, address);
+
+    // Orr in the new mask.
+    u32 value = expected | new_orr_mask;
+
+    // If the value is zero, use the if_zero value, otherwise use the newly orr'd value.
+    if (!expected) {
+        value = if_zero;
+    }
+
+    // Try to store.
+    if (!monitor.ExclusiveWrite32(current_core, address, value)) {
+        // If we failed to store, try again.
+        return UpdateLockAtomic(system, out, address, if_zero, new_orr_mask);
+    }
+
+    // We're done.
+    *out = expected;
+    return true;
+}
+
+} // namespace
+
+KConditionVariable::KConditionVariable(Core::System& system_)
+    : system{system_}, kernel{system.Kernel()} {}
+
+KConditionVariable::~KConditionVariable() = default;
+
+ResultCode KConditionVariable::SignalToAddress(VAddr addr) {
+    Thread* owner_thread = kernel.CurrentScheduler()->GetCurrentThread();
+
+    // Signal the address.
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        // Remove waiter thread.
+        s32 num_waiters{};
+        Thread* next_owner_thread =
+            owner_thread->RemoveWaiterByKey(std::addressof(num_waiters), addr);
+
+        // Determine the next tag.
+        u32 next_value{};
+        if (next_owner_thread) {
+            next_value = next_owner_thread->GetAddressKeyValue();
+            if (num_waiters > 1) {
+                next_value |= Svc::HandleWaitMask;
+            }
+
+            next_owner_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
+            next_owner_thread->Wakeup();
+        }
+
+        // Write the value to userspace.
+        if (!WriteToUser(system, addr, std::addressof(next_value))) {
+            if (next_owner_thread) {
+                next_owner_thread->SetSyncedObject(nullptr, Svc::ResultInvalidCurrentMemory);
+            }
+
+            return Svc::ResultInvalidCurrentMemory;
+        }
+    }
+
+    return RESULT_SUCCESS;
+}
+
+ResultCode KConditionVariable::WaitForAddress(Handle handle, VAddr addr, u32 value) {
+    Thread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
+
+    // Wait for the address.
+    {
+        std::shared_ptr<Thread> owner_thread;
+        ASSERT(!owner_thread);
+        {
+            KScopedSchedulerLock sl(kernel);
+            cur_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
+
+            // Check if the thread should terminate.
+            R_UNLESS(!cur_thread->IsTerminationRequested(), Svc::ResultTerminationRequested);
+
+            {
+                // Read the tag from userspace.
+                u32 test_tag{};
+                R_UNLESS(ReadFromUser(system, std::addressof(test_tag), addr),
+                         Svc::ResultInvalidCurrentMemory);
+
+                // If the tag isn't the handle (with wait mask), we're done.
+                R_UNLESS(test_tag == (handle | Svc::HandleWaitMask), RESULT_SUCCESS);
+
+                // Get the lock owner thread.
+                owner_thread = kernel.CurrentProcess()->GetHandleTable().Get<Thread>(handle);
+                R_UNLESS(owner_thread, Svc::ResultInvalidHandle);
+
+                // Update the lock.
+                cur_thread->SetAddressKey(addr, value);
+                owner_thread->AddWaiter(cur_thread);
+                cur_thread->SetState(ThreadState::Waiting);
+                cur_thread->SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::ConditionVar);
+                cur_thread->SetMutexWaitAddressForDebugging(addr);
+            }
+        }
+        ASSERT(owner_thread);
+    }
+
+    // Remove the thread as a waiter from the lock owner.
+    {
+        KScopedSchedulerLock sl(kernel);
+        Thread* owner_thread = cur_thread->GetLockOwner();
+        if (owner_thread != nullptr) {
+            owner_thread->RemoveWaiter(cur_thread);
+        }
+    }
+
+    // Get the wait result.
+    KSynchronizationObject* dummy{};
+    return cur_thread->GetWaitResult(std::addressof(dummy));
+}
+
+Thread* KConditionVariable::SignalImpl(Thread* thread) {
+    // Check pre-conditions.
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    // Update the tag.
+    VAddr address = thread->GetAddressKey();
+    u32 own_tag = thread->GetAddressKeyValue();
+
+    u32 prev_tag{};
+    bool can_access{};
+    {
+        // TODO(bunnei): We should disable interrupts here via KScopedInterruptDisable.
+        // TODO(bunnei): We should call CanAccessAtomic(..) here.
+        can_access = true;
+        if (can_access) {
+            UpdateLockAtomic(system, std::addressof(prev_tag), address, own_tag,
+                             Svc::HandleWaitMask);
+        }
+    }
+
+    Thread* thread_to_close = nullptr;
+    if (can_access) {
+        if (prev_tag == InvalidHandle) {
+            // If nobody held the lock previously, we're all good.
+            thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
+            thread->Wakeup();
+        } else {
+            // Get the previous owner.
+            auto owner_thread = kernel.CurrentProcess()->GetHandleTable().Get<Thread>(
+                prev_tag & ~Svc::HandleWaitMask);
+
+            if (owner_thread) {
+                // Add the thread as a waiter on the owner.
+                owner_thread->AddWaiter(thread);
+                thread_to_close = owner_thread.get();
+            } else {
+                // The lock was tagged with a thread that doesn't exist.
+                thread->SetSyncedObject(nullptr, Svc::ResultInvalidState);
+                thread->Wakeup();
+            }
+        }
+    } else {
+        // If the address wasn't accessible, note so.
+        thread->SetSyncedObject(nullptr, Svc::ResultInvalidCurrentMemory);
+        thread->Wakeup();
+    }
+
+    return thread_to_close;
+}
+
+void KConditionVariable::Signal(u64 cv_key, s32 count) {
+    // Prepare for signaling.
+    constexpr int MaxThreads = 16;
+
+    // TODO(bunnei): This should just be Thread once we implement KAutoObject instead of using
+    // std::shared_ptr.
+    std::vector<std::shared_ptr<Thread>> thread_list;
+    std::array<Thread*, MaxThreads> thread_array;
+    s32 num_to_close{};
+
+    // Perform signaling.
+    s32 num_waiters{};
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        auto it = thread_tree.nfind_light({cv_key, -1});
+        while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
+               (it->GetConditionVariableKey() == cv_key)) {
+            Thread* target_thread = std::addressof(*it);
+
+            if (Thread* thread = SignalImpl(target_thread); thread != nullptr) {
+                if (num_to_close < MaxThreads) {
+                    thread_array[num_to_close++] = thread;
+                } else {
+                    thread_list.push_back(SharedFrom(thread));
+                }
+            }
+
+            it = thread_tree.erase(it);
+            target_thread->ClearConditionVariable();
+            ++num_waiters;
+        }
+
+        // If we have no waiters, clear the has waiter flag.
+        if (it == thread_tree.end() || it->GetConditionVariableKey() != cv_key) {
+            const u32 has_waiter_flag{};
+            WriteToUser(system, cv_key, std::addressof(has_waiter_flag));
+        }
+    }
+
+    // Close threads in the array.
+    for (auto i = 0; i < num_to_close; ++i) {
+        thread_array[i]->Close();
+    }
+
+    // Close threads in the list.
+    for (auto it = thread_list.begin(); it != thread_list.end(); it = thread_list.erase(it)) {
+        (*it)->Close();
+    }
+}
+
+ResultCode KConditionVariable::Wait(VAddr addr, u64 key, u32 value, s64 timeout) {
+    // Prepare to wait.
+    Thread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
+    Handle timer = InvalidHandle;
+
+    {
+        KScopedSchedulerLockAndSleep slp(kernel, timer, cur_thread, timeout);
+
+        // Set the synced object.
+        cur_thread->SetSyncedObject(nullptr, Svc::ResultTimedOut);
+
+        // Check that the thread isn't terminating.
+        if (cur_thread->IsTerminationRequested()) {
+            slp.CancelSleep();
+            return Svc::ResultTerminationRequested;
+        }
+
+        // Update the value and process for the next owner.
+        {
+            // Remove waiter thread.
+            s32 num_waiters{};
+            Thread* next_owner_thread =
+                cur_thread->RemoveWaiterByKey(std::addressof(num_waiters), addr);
+
+            // Update for the next owner thread.
+            u32 next_value{};
+            if (next_owner_thread != nullptr) {
+                // Get the next tag value.
+                next_value = next_owner_thread->GetAddressKeyValue();
+                if (num_waiters > 1) {
+                    next_value |= Svc::HandleWaitMask;
+                }
+
+                // Wake up the next owner.
+                next_owner_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
+                next_owner_thread->Wakeup();
+            }
+
+            // Write to the cv key.
+            {
+                const u32 has_waiter_flag = 1;
+                WriteToUser(system, key, std::addressof(has_waiter_flag));
+                // TODO(bunnei): We should call DataMemoryBarrier(..) here.
+            }
+
+            // Write the value to userspace.
+            if (!WriteToUser(system, addr, std::addressof(next_value))) {
+                slp.CancelSleep();
+                return Svc::ResultInvalidCurrentMemory;
+            }
+        }
+
+        // Update condition variable tracking.
+        {
+            cur_thread->SetConditionVariable(std::addressof(thread_tree), addr, key, value);
+            thread_tree.insert(*cur_thread);
+        }
+
+        // If the timeout is non-zero, set the thread as waiting.
+        if (timeout != 0) {
+            cur_thread->SetState(ThreadState::Waiting);
+            cur_thread->SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::ConditionVar);
+            cur_thread->SetMutexWaitAddressForDebugging(addr);
+        }
+    }
+
+    // Cancel the timer wait.
+    if (timer != InvalidHandle) {
+        auto& time_manager = kernel.TimeManager();
+        time_manager.UnscheduleTimeEvent(timer);
+    }
+
+    // Remove from the condition variable.
+    {
+        KScopedSchedulerLock sl(kernel);
+
+        if (Thread* owner = cur_thread->GetLockOwner(); owner != nullptr) {
+            owner->RemoveWaiter(cur_thread);
+        }
+
+        if (cur_thread->IsWaitingForConditionVariable()) {
+            thread_tree.erase(thread_tree.iterator_to(*cur_thread));
+            cur_thread->ClearConditionVariable();
+        }
+    }
+
+    // Get the result.
+    KSynchronizationObject* dummy{};
+    return cur_thread->GetWaitResult(std::addressof(dummy));
+}
+
+} // namespace Kernel

src/core/hle/kernel/k_condition_variable.h

@@ -0,0 +1,59 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/assert.h"
+#include "common/common_types.h"
+
+#include "core/hle/kernel/k_scheduler.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/thread.h"
+#include "core/hle/result.h"
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+
+class KConditionVariable {
+public:
+    using ThreadTree = typename Thread::ConditionVariableThreadTreeType;
+
+    explicit KConditionVariable(Core::System& system_);
+    ~KConditionVariable();
+
+    // Arbitration
+    [[nodiscard]] ResultCode SignalToAddress(VAddr addr);
+    [[nodiscard]] ResultCode WaitForAddress(Handle handle, VAddr addr, u32 value);
+
+    // Condition variable
+    void Signal(u64 cv_key, s32 count);
+    [[nodiscard]] ResultCode Wait(VAddr addr, u64 key, u32 value, s64 timeout);
+
+private:
+    [[nodiscard]] Thread* SignalImpl(Thread* thread);
+
+    ThreadTree thread_tree;
+
+    Core::System& system;
+    KernelCore& kernel;
+};
+
+inline void BeforeUpdatePriority(const KernelCore& kernel, KConditionVariable::ThreadTree* tree,
+                                 Thread* thread) {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    tree->erase(tree->iterator_to(*thread));
+}
+
+inline void AfterUpdatePriority(const KernelCore& kernel, KConditionVariable::ThreadTree* tree,
+                                Thread* thread) {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    tree->insert(*thread);
+}
+
+} // namespace Kernel

src/core/hle/kernel/k_priority_queue.h

@@ -0,0 +1,451 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include <array>
+#include <concepts>
+
+#include "common/assert.h"
+#include "common/bit_set.h"
+#include "common/bit_util.h"
+#include "common/common_types.h"
+#include "common/concepts.h"
+
+namespace Kernel {
+
+class Thread;
+
+template <typename T>
+concept KPriorityQueueAffinityMask = !std::is_reference_v<T> && requires(T & t) {
+    { t.GetAffinityMask() }
+    ->Common::ConvertibleTo<u64>;
+    {t.SetAffinityMask(std::declval<u64>())};
+
+    { t.GetAffinity(std::declval<int32_t>()) }
+    ->std::same_as<bool>;
+    {t.SetAffinity(std::declval<int32_t>(), std::declval<bool>())};
+    {t.SetAll()};
+};
+
+template <typename T>
+concept KPriorityQueueMember = !std::is_reference_v<T> && requires(T & t) {
+    {typename T::QueueEntry()};
+    {(typename T::QueueEntry()).Initialize()};
+    {(typename T::QueueEntry()).SetPrev(std::addressof(t))};
+    {(typename T::QueueEntry()).SetNext(std::addressof(t))};
+    { (typename T::QueueEntry()).GetNext() }
+    ->std::same_as<T*>;
+    { (typename T::QueueEntry()).GetPrev() }
+    ->std::same_as<T*>;
+    { t.GetPriorityQueueEntry(std::declval<s32>()) }
+    ->std::same_as<typename T::QueueEntry&>;
+
+    {t.GetAffinityMask()};
+    { typename std::remove_cvref<decltype(t.GetAffinityMask())>::type() }
+    ->KPriorityQueueAffinityMask;
+
+    { t.GetActiveCore() }
+    ->Common::ConvertibleTo<s32>;
+    { t.GetPriority() }
+    ->Common::ConvertibleTo<s32>;
+};
+
+template <typename Member, size_t _NumCores, int LowestPriority, int HighestPriority>
+requires KPriorityQueueMember<Member> class KPriorityQueue {
+public:
+    using AffinityMaskType = typename std::remove_cv_t<
+        typename std::remove_reference<decltype(std::declval<Member>().GetAffinityMask())>::type>;
+
+    static_assert(LowestPriority >= 0);
+    static_assert(HighestPriority >= 0);
+    static_assert(LowestPriority >= HighestPriority);
+    static constexpr size_t NumPriority = LowestPriority - HighestPriority + 1;
+    static constexpr size_t NumCores = _NumCores;
+
+    static constexpr bool IsValidCore(s32 core) {
+        return 0 <= core && core < static_cast<s32>(NumCores);
+    }
+
+    static constexpr bool IsValidPriority(s32 priority) {
+        return HighestPriority <= priority && priority <= LowestPriority + 1;
+    }
+
+private:
+    using Entry = typename Member::QueueEntry;
+
+public:
+    class KPerCoreQueue {
+    private:
+        std::array<Entry, NumCores> root{};
+
+    public:
+        constexpr KPerCoreQueue() {
+            for (auto& per_core_root : root) {
+                per_core_root.Initialize();
+            }
+        }
+
+        constexpr bool PushBack(s32 core, Member* member) {
+            // Get the entry associated with the member.
+            Entry& member_entry = member->GetPriorityQueueEntry(core);
+
+            // Get the entry associated with the end of the queue.
+            Member* tail = this->root[core].GetPrev();
+            Entry& tail_entry =
+                (tail != nullptr) ? tail->GetPriorityQueueEntry(core) : this->root[core];
+
+            // Link the entries.
+            member_entry.SetPrev(tail);
+            member_entry.SetNext(nullptr);
+            tail_entry.SetNext(member);
+            this->root[core].SetPrev(member);
+
+            return tail == nullptr;
+        }
+
+        constexpr bool PushFront(s32 core, Member* member) {
+            // Get the entry associated with the member.
+            Entry& member_entry = member->GetPriorityQueueEntry(core);
+
+            // Get the entry associated with the front of the queue.
+            Member* head = this->root[core].GetNext();
+            Entry& head_entry =
+                (head != nullptr) ? head->GetPriorityQueueEntry(core) : this->root[core];
+
+            // Link the entries.
+            member_entry.SetPrev(nullptr);
+            member_entry.SetNext(head);
+            head_entry.SetPrev(member);
+            this->root[core].SetNext(member);
+
+            return (head == nullptr);
+        }
+
+        constexpr bool Remove(s32 core, Member* member) {
+            // Get the entry associated with the member.
+            Entry& member_entry = member->GetPriorityQueueEntry(core);
+
+            // Get the entries associated with next and prev.
+            Member* prev = member_entry.GetPrev();
+            Member* next = member_entry.GetNext();
+            Entry& prev_entry =
+                (prev != nullptr) ? prev->GetPriorityQueueEntry(core) : this->root[core];
+            Entry& next_entry =
+                (next != nullptr) ? next->GetPriorityQueueEntry(core) : this->root[core];
+
+            // Unlink.
+            prev_entry.SetNext(next);
+            next_entry.SetPrev(prev);
+
+            return (this->GetFront(core) == nullptr);
+        }
+
+        constexpr Member* GetFront(s32 core) const {
+            return this->root[core].GetNext();
+        }
+    };
+
+    class KPriorityQueueImpl {
+    public:
+        constexpr KPriorityQueueImpl() = default;
+
+        constexpr void PushBack(s32 priority, s32 core, Member* member) {
+            ASSERT(IsValidCore(core));
+            ASSERT(IsValidPriority(priority));
+
+            if (priority > LowestPriority) {
+                return;
+            }
+
+            if (this->queues[priority].PushBack(core, member)) {
+                this->available_priorities[core].SetBit(priority);
+            }
+        }
+
+        constexpr void PushFront(s32 priority, s32 core, Member* member) {
+            ASSERT(IsValidCore(core));
+            ASSERT(IsValidPriority(priority));
+
+            if (priority > LowestPriority) {
+                return;
+            }
+
+            if (this->queues[priority].PushFront(core, member)) {
+                this->available_priorities[core].SetBit(priority);
+            }
+        }
+
+        constexpr void Remove(s32 priority, s32 core, Member* member) {
+            ASSERT(IsValidCore(core));
+            ASSERT(IsValidPriority(priority));
+
+            if (priority > LowestPriority) {
+                return;
+            }
+
+            if (this->queues[priority].Remove(core, member)) {
+                this->available_priorities[core].ClearBit(priority);
+            }
+        }
+
+        constexpr Member* GetFront(s32 core) const {
+            ASSERT(IsValidCore(core));
+
+            const s32 priority =
+                static_cast<s32>(this->available_priorities[core].CountLeadingZero());
+            if (priority <= LowestPriority) {
+                return this->queues[priority].GetFront(core);
+            } else {
+                return nullptr;
+            }
+        }
+
+        constexpr Member* GetFront(s32 priority, s32 core) const {
+            ASSERT(IsValidCore(core));
+            ASSERT(IsValidPriority(priority));
+
+            if (priority <= LowestPriority) {
+                return this->queues[priority].GetFront(core);
+            } else {
+                return nullptr;
+            }
+        }
+
+        constexpr Member* GetNext(s32 core, const Member* member) const {
+            ASSERT(IsValidCore(core));
+
+            Member* next = member->GetPriorityQueueEntry(core).GetNext();
+            if (next == nullptr) {
+                const s32 priority = static_cast<s32>(
+                    this->available_priorities[core].GetNextSet(member->GetPriority()));
+                if (priority <= LowestPriority) {
+                    next = this->queues[priority].GetFront(core);
+                }
+            }
+            return next;
+        }
+
+        constexpr void MoveToFront(s32 priority, s32 core, Member* member) {
+            ASSERT(IsValidCore(core));
+            ASSERT(IsValidPriority(priority));
+
+            if (priority <= LowestPriority) {
+                this->queues[priority].Remove(core, member);
+                this->queues[priority].PushFront(core, member);
+            }
+        }
+
+        constexpr Member* MoveToBack(s32 priority, s32 core, Member* member) {
+            ASSERT(IsValidCore(core));
+            ASSERT(IsValidPriority(priority));
+
+            if (priority <= LowestPriority) {
+                this->queues[priority].Remove(core, member);
+                this->queues[priority].PushBack(core, member);
+                return this->queues[priority].GetFront(core);
+            } else {
+                return nullptr;
+            }
+        }
+
+    private:
+        std::array<KPerCoreQueue, NumPriority> queues{};
+        std::array<Common::BitSet64<NumPriority>, NumCores> available_priorities{};
+    };
+
+private:
+    KPriorityQueueImpl scheduled_queue;
+    KPriorityQueueImpl suggested_queue;
+
+private:
+    constexpr void ClearAffinityBit(u64& affinity, s32 core) {
+        affinity &= ~(u64(1) << core);
+    }
+
+    constexpr s32 GetNextCore(u64& affinity) {
+        const s32 core = Common::CountTrailingZeroes64(affinity);
+        ClearAffinityBit(affinity, core);
+        return core;
+    }
+
+    constexpr void PushBack(s32 priority, Member* member) {
+        ASSERT(IsValidPriority(priority));
+
+        // Push onto the scheduled queue for its core, if we can.
+        u64 affinity = member->GetAffinityMask().GetAffinityMask();
+        if (const s32 core = member->GetActiveCore(); core >= 0) {
+            this->scheduled_queue.PushBack(priority, core, member);
+            ClearAffinityBit(affinity, core);
+        }
+
+        // And suggest the thread for all other cores.
+        while (affinity) {
+            this->suggested_queue.PushBack(priority, GetNextCore(affinity), member);
+        }
+    }
+
+    constexpr void PushFront(s32 priority, Member* member) {
+        ASSERT(IsValidPriority(priority));
+
+        // Push onto the scheduled queue for its core, if we can.
+        u64 affinity = member->GetAffinityMask().GetAffinityMask();
+        if (const s32 core = member->GetActiveCore(); core >= 0) {
+            this->scheduled_queue.PushFront(priority, core, member);
+            ClearAffinityBit(affinity, core);
+        }
+
+        // And suggest the thread for all other cores.
+        // Note: Nintendo pushes onto the back of the suggested queue, not the front.
+        while (affinity) {
+            this->suggested_queue.PushBack(priority, GetNextCore(affinity), member);
+        }
+    }
+
+    constexpr void Remove(s32 priority, Member* member) {
+        ASSERT(IsValidPriority(priority));
+
+        // Remove from the scheduled queue for its core.
+        u64 affinity = member->GetAffinityMask().GetAffinityMask();
+        if (const s32 core = member->GetActiveCore(); core >= 0) {
+            this->scheduled_queue.Remove(priority, core, member);
+            ClearAffinityBit(affinity, core);
+        }
+
+        // Remove from the suggested queue for all other cores.
+        while (affinity) {
+            this->suggested_queue.Remove(priority, GetNextCore(affinity), member);
+        }
+    }
+
+public:
+    constexpr KPriorityQueue() = default;
+
+    // Getters.
+    constexpr Member* GetScheduledFront(s32 core) const {
+        return this->scheduled_queue.GetFront(core);
+    }
+
+    constexpr Member* GetScheduledFront(s32 core, s32 priority) const {
+        return this->scheduled_queue.GetFront(priority, core);
+    }
+
+    constexpr Member* GetSuggestedFront(s32 core) const {
+        return this->suggested_queue.GetFront(core);
+    }
+
+    constexpr Member* GetSuggestedFront(s32 core, s32 priority) const {
+        return this->suggested_queue.GetFront(priority, core);
+    }
+
+    constexpr Member* GetScheduledNext(s32 core, const Member* member) const {
+        return this->scheduled_queue.GetNext(core, member);
+    }
+
+    constexpr Member* GetSuggestedNext(s32 core, const Member* member) const {
+        return this->suggested_queue.GetNext(core, member);
+    }
+
+    constexpr Member* GetSamePriorityNext(s32 core, const Member* member) const {
+        return member->GetPriorityQueueEntry(core).GetNext();
+    }
+
+    // Mutators.
+    constexpr void PushBack(Member* member) {
+        this->PushBack(member->GetPriority(), member);
+    }
+
+    constexpr void Remove(Member* member) {
+        this->Remove(member->GetPriority(), member);
+    }
+
+    constexpr void MoveToScheduledFront(Member* member) {
+        this->scheduled_queue.MoveToFront(member->GetPriority(), member->GetActiveCore(), member);
+    }
+
+    constexpr Thread* MoveToScheduledBack(Member* member) {
+        return this->scheduled_queue.MoveToBack(member->GetPriority(), member->GetActiveCore(),
+                                                member);
+    }
+
+    // First class fancy operations.
+    constexpr void ChangePriority(s32 prev_priority, bool is_running, Member* member) {
+        ASSERT(IsValidPriority(prev_priority));
+
+        // Remove the member from the queues.
+        const s32 new_priority = member->GetPriority();
+        this->Remove(prev_priority, member);
+
+        // And enqueue. If the member is running, we want to keep it running.
+        if (is_running) {
+            this->PushFront(new_priority, member);
+        } else {
+            this->PushBack(new_priority, member);
+        }
+    }
+
+    constexpr void ChangeAffinityMask(s32 prev_core, const AffinityMaskType& prev_affinity,
+                                      Member* member) {
+        // Get the new information.
+        const s32 priority = member->GetPriority();
+        const AffinityMaskType& new_affinity = member->GetAffinityMask();
+        const s32 new_core = member->GetActiveCore();
+
+        // Remove the member from all queues it was in before.
+        for (s32 core = 0; core < static_cast<s32>(NumCores); core++) {
+            if (prev_affinity.GetAffinity(core)) {
+                if (core == prev_core) {
+                    this->scheduled_queue.Remove(priority, core, member);
+                } else {
+                    this->suggested_queue.Remove(priority, core, member);
+                }
+            }
+        }
+
+        // And add the member to all queues it should be in now.
+        for (s32 core = 0; core < static_cast<s32>(NumCores); core++) {
+            if (new_affinity.GetAffinity(core)) {
+                if (core == new_core) {
+                    this->scheduled_queue.PushBack(priority, core, member);
+                } else {
+                    this->suggested_queue.PushBack(priority, core, member);
+                }
+            }
+        }
+    }
+
+    constexpr void ChangeCore(s32 prev_core, Member* member, bool to_front = false) {
+        // Get the new information.
+        const s32 new_core = member->GetActiveCore();
+        const s32 priority = member->GetPriority();
+
+        // We don't need to do anything if the core is the same.
+        if (prev_core != new_core) {
+            // Remove from the scheduled queue for the previous core.
+            if (prev_core >= 0) {
+                this->scheduled_queue.Remove(priority, prev_core, member);
+            }
+
+            // Remove from the suggested queue and add to the scheduled queue for the new core.
+            if (new_core >= 0) {
+                this->suggested_queue.Remove(priority, new_core, member);
+                if (to_front) {
+                    this->scheduled_queue.PushFront(priority, new_core, member);
+                } else {
+                    this->scheduled_queue.PushBack(priority, new_core, member);
+                }
+            }
+
+            // Add to the suggested queue for the previous core.
+            if (prev_core >= 0) {
+                this->suggested_queue.PushBack(priority, prev_core, member);
+            }
+        }
+    }
+};
+
+} // namespace Kernel

src/core/hle/kernel/k_scheduler.cpp

@@ -0,0 +1,781 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#include "common/assert.h"
+#include "common/bit_util.h"
+#include "common/fiber.h"
+#include "common/logging/log.h"
+#include "core/arm/arm_interface.h"
+#include "core/core.h"
+#include "core/core_timing.h"
+#include "core/cpu_manager.h"
+#include "core/hle/kernel/k_scheduler.h"
+#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/physical_core.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/kernel/thread.h"
+#include "core/hle/kernel/time_manager.h"
+
+namespace Kernel {
+
+static void IncrementScheduledCount(Kernel::Thread* thread) {
+    if (auto process = thread->GetOwnerProcess(); process) {
+        process->IncrementScheduledCount();
+    }
+}
+
+void KScheduler::RescheduleCores(KernelCore& kernel, u64 cores_pending_reschedule,
+                                 Core::EmuThreadHandle global_thread) {
+    u32 current_core = global_thread.host_handle;
+    bool must_context_switch = global_thread.guest_handle != InvalidHandle &&
+                               (current_core < Core::Hardware::NUM_CPU_CORES);
+
+    while (cores_pending_reschedule != 0) {
+        u32 core = Common::CountTrailingZeroes64(cores_pending_reschedule);
+        ASSERT(core < Core::Hardware::NUM_CPU_CORES);
+        if (!must_context_switch || core != current_core) {
+            auto& phys_core = kernel.PhysicalCore(core);
+            phys_core.Interrupt();
+        } else {
+            must_context_switch = true;
+        }
+        cores_pending_reschedule &= ~(1ULL << core);
+    }
+    if (must_context_switch) {
+        auto core_scheduler = kernel.CurrentScheduler();
+        kernel.ExitSVCProfile();
+        core_scheduler->RescheduleCurrentCore();
+        kernel.EnterSVCProfile();
+    }
+}
+
+u64 KScheduler::UpdateHighestPriorityThread(Thread* highest_thread) {
+    std::scoped_lock lock{guard};
+    if (Thread* prev_highest_thread = this->state.highest_priority_thread;
+        prev_highest_thread != highest_thread) {
+        if (prev_highest_thread != nullptr) {
+            IncrementScheduledCount(prev_highest_thread);
+            prev_highest_thread->SetLastScheduledTick(system.CoreTiming().GetCPUTicks());
+        }
+        if (this->state.should_count_idle) {
+            if (highest_thread != nullptr) {
+                // if (Process* process = highest_thread->GetOwnerProcess(); process != nullptr) {
+                //    process->SetRunningThread(this->core_id, highest_thread,
+                //                              this->state.idle_count);
+                //}
+            } else {
+                this->state.idle_count++;
+            }
+        }
+
+        this->state.highest_priority_thread = highest_thread;
+        this->state.needs_scheduling = true;
+        return (1ULL << this->core_id);
+    } else {
+        return 0;
+    }
+}
+
+u64 KScheduler::UpdateHighestPriorityThreadsImpl(KernelCore& kernel) {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    // Clear that we need to update.
+    ClearSchedulerUpdateNeeded(kernel);
+
+    u64 cores_needing_scheduling = 0, idle_cores = 0;
+    Thread* top_threads[Core::Hardware::NUM_CPU_CORES];
+    auto& priority_queue = GetPriorityQueue(kernel);
+
+    /// We want to go over all cores, finding the highest priority thread and determining if
+    /// scheduling is needed for that core.
+    for (size_t core_id = 0; core_id < Core::Hardware::NUM_CPU_CORES; core_id++) {
+        Thread* top_thread = priority_queue.GetScheduledFront(static_cast<s32>(core_id));
+        if (top_thread != nullptr) {
+            // If the thread has no waiters, we need to check if the process has a thread pinned.
+            // TODO(bunnei): Implement thread pinning
+        } else {
+            idle_cores |= (1ULL << core_id);
+        }
+
+        top_threads[core_id] = top_thread;
+        cores_needing_scheduling |=
+            kernel.Scheduler(core_id).UpdateHighestPriorityThread(top_threads[core_id]);
+    }
+
+    // Idle cores are bad. We're going to try to migrate threads to each idle core in turn.
+    while (idle_cores != 0) {
+        u32 core_id = Common::CountTrailingZeroes64(idle_cores);
+        if (Thread* suggested = priority_queue.GetSuggestedFront(core_id); suggested != nullptr) {
+            s32 migration_candidates[Core::Hardware::NUM_CPU_CORES];
+            size_t num_candidates = 0;
+
+            // While we have a suggested thread, try to migrate it!
+            while (suggested != nullptr) {
+                // Check if the suggested thread is the top thread on its core.
+                const s32 suggested_core = suggested->GetActiveCore();
+                if (Thread* top_thread =
+                        (suggested_core >= 0) ? top_threads[suggested_core] : nullptr;
+                    top_thread != suggested) {
+                    // Make sure we're not dealing with threads too high priority for migration.
+                    if (top_thread != nullptr &&
+                        top_thread->GetPriority() < HighestCoreMigrationAllowedPriority) {
+                        break;
+                    }
+
+                    // The suggested thread isn't bound to its core, so we can migrate it!
+                    suggested->SetActiveCore(core_id);
+                    priority_queue.ChangeCore(suggested_core, suggested);
+
+                    top_threads[core_id] = suggested;
+                    cores_needing_scheduling |=
+                        kernel.Scheduler(core_id).UpdateHighestPriorityThread(top_threads[core_id]);
+                    break;
+                }
+
+                // Note this core as a candidate for migration.
+                ASSERT(num_candidates < Core::Hardware::NUM_CPU_CORES);
+                migration_candidates[num_candidates++] = suggested_core;
+                suggested = priority_queue.GetSuggestedNext(core_id, suggested);
+            }
+
+            // If suggested is nullptr, we failed to migrate a specific thread. So let's try all our
+            // candidate cores' top threads.
+            if (suggested == nullptr) {
+                for (size_t i = 0; i < num_candidates; i++) {
+                    // Check if there's some other thread that can run on the candidate core.
+                    const s32 candidate_core = migration_candidates[i];
+                    suggested = top_threads[candidate_core];
+                    if (Thread* next_on_candidate_core =
+                            priority_queue.GetScheduledNext(candidate_core, suggested);
+                        next_on_candidate_core != nullptr) {
+                        // The candidate core can run some other thread! We'll migrate its current
+                        // top thread to us.
+                        top_threads[candidate_core] = next_on_candidate_core;
+                        cores_needing_scheduling |=
+                            kernel.Scheduler(candidate_core)
+                                .UpdateHighestPriorityThread(top_threads[candidate_core]);
+
+                        // Perform the migration.
+                        suggested->SetActiveCore(core_id);
+                        priority_queue.ChangeCore(candidate_core, suggested);
+
+                        top_threads[core_id] = suggested;
+                        cores_needing_scheduling |=
+                            kernel.Scheduler(core_id).UpdateHighestPriorityThread(
+                                top_threads[core_id]);
+                        break;
+                    }
+                }
+            }
+        }
+
+        idle_cores &= ~(1ULL << core_id);
+    }
+
+    return cores_needing_scheduling;
+}
+
+void KScheduler::OnThreadStateChanged(KernelCore& kernel, Thread* thread, ThreadState old_state) {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    // Check if the state has changed, because if it hasn't there's nothing to do.
+    const auto cur_state = thread->GetRawState();
+    if (cur_state == old_state) {
+        return;
+    }
+
+    // Update the priority queues.
+    if (old_state == ThreadState::Runnable) {
+        // If we were previously runnable, then we're not runnable now, and we should remove.
+        GetPriorityQueue(kernel).Remove(thread);
+        IncrementScheduledCount(thread);
+        SetSchedulerUpdateNeeded(kernel);
+    } else if (cur_state == ThreadState::Runnable) {
+        // If we're now runnable, then we weren't previously, and we should add.
+        GetPriorityQueue(kernel).PushBack(thread);
+        IncrementScheduledCount(thread);
+        SetSchedulerUpdateNeeded(kernel);
+    }
+}
+
+void KScheduler::OnThreadPriorityChanged(KernelCore& kernel, Thread* thread, s32 old_priority) {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    // If the thread is runnable, we want to change its priority in the queue.
+    if (thread->GetRawState() == ThreadState::Runnable) {
+        GetPriorityQueue(kernel).ChangePriority(
+            old_priority, thread == kernel.CurrentScheduler()->GetCurrentThread(), thread);
+        IncrementScheduledCount(thread);
+        SetSchedulerUpdateNeeded(kernel);
+    }
+}
+
+void KScheduler::OnThreadAffinityMaskChanged(KernelCore& kernel, Thread* thread,
+                                             const KAffinityMask& old_affinity, s32 old_core) {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    // If the thread is runnable, we want to change its affinity in the queue.
+    if (thread->GetRawState() == ThreadState::Runnable) {
+        GetPriorityQueue(kernel).ChangeAffinityMask(old_core, old_affinity, thread);
+        IncrementScheduledCount(thread);
+        SetSchedulerUpdateNeeded(kernel);
+    }
+}
+
+void KScheduler::RotateScheduledQueue(s32 core_id, s32 priority) {
+    ASSERT(system.GlobalSchedulerContext().IsLocked());
+
+    // Get a reference to the priority queue.
+    auto& kernel = system.Kernel();
+    auto& priority_queue = GetPriorityQueue(kernel);
+
+    // Rotate the front of the queue to the end.
+    Thread* top_thread = priority_queue.GetScheduledFront(core_id, priority);
+    Thread* next_thread = nullptr;
+    if (top_thread != nullptr) {
+        next_thread = priority_queue.MoveToScheduledBack(top_thread);
+        if (next_thread != top_thread) {
+            IncrementScheduledCount(top_thread);
+            IncrementScheduledCount(next_thread);
+        }
+    }
+
+    // While we have a suggested thread, try to migrate it!
+    {
+        Thread* suggested = priority_queue.GetSuggestedFront(core_id, priority);
+        while (suggested != nullptr) {
+            // Check if the suggested thread is the top thread on its core.
+            const s32 suggested_core = suggested->GetActiveCore();
+            if (Thread* top_on_suggested_core =
+                    (suggested_core >= 0) ? priority_queue.GetScheduledFront(suggested_core)
+                                          : nullptr;
+                top_on_suggested_core != suggested) {
+                // If the next thread is a new thread that has been waiting longer than our
+                // suggestion, we prefer it to our suggestion.
+                if (top_thread != next_thread && next_thread != nullptr &&
+                    next_thread->GetLastScheduledTick() < suggested->GetLastScheduledTick()) {
+                    suggested = nullptr;
+                    break;
+                }
+
+                // If we're allowed to do a migration, do one.
+                // NOTE: Unlike migrations in UpdateHighestPriorityThread, this moves the suggestion
+                // to the front of the queue.
+                if (top_on_suggested_core == nullptr ||
+                    top_on_suggested_core->GetPriority() >= HighestCoreMigrationAllowedPriority) {
+                    suggested->SetActiveCore(core_id);
+                    priority_queue.ChangeCore(suggested_core, suggested, true);
+                    IncrementScheduledCount(suggested);
+                    break;
+                }
+            }
+
+            // Get the next suggestion.
+            suggested = priority_queue.GetSamePriorityNext(core_id, suggested);
+        }
+    }
+
+    // Now that we might have migrated a thread with the same priority, check if we can do better.
+
+    {
+        Thread* best_thread = priority_queue.GetScheduledFront(core_id);
+        if (best_thread == GetCurrentThread()) {
+            best_thread = priority_queue.GetScheduledNext(core_id, best_thread);
+        }
+
+        // If the best thread we can choose has a priority the same or worse than ours, try to
+        // migrate a higher priority thread.
+        if (best_thread != nullptr && best_thread->GetPriority() >= priority) {
+            Thread* suggested = priority_queue.GetSuggestedFront(core_id);
+            while (suggested != nullptr) {
+                // If the suggestion's priority is the same as ours, don't bother.
+                if (suggested->GetPriority() >= best_thread->GetPriority()) {
+                    break;
+                }
+
+                // Check if the suggested thread is the top thread on its core.
+                const s32 suggested_core = suggested->GetActiveCore();
+                if (Thread* top_on_suggested_core =
+                        (suggested_core >= 0) ? priority_queue.GetScheduledFront(suggested_core)
+                                              : nullptr;
+                    top_on_suggested_core != suggested) {
+                    // If we're allowed to do a migration, do one.
+                    // NOTE: Unlike migrations in UpdateHighestPriorityThread, this moves the
+                    // suggestion to the front of the queue.
+                    if (top_on_suggested_core == nullptr ||
+                        top_on_suggested_core->GetPriority() >=
+                            HighestCoreMigrationAllowedPriority) {
+                        suggested->SetActiveCore(core_id);
+                        priority_queue.ChangeCore(suggested_core, suggested, true);
+                        IncrementScheduledCount(suggested);
+                        break;
+                    }
+                }
+
+                // Get the next suggestion.
+                suggested = priority_queue.GetSuggestedNext(core_id, suggested);
+            }
+        }
+    }
+
+    // After a rotation, we need a scheduler update.
+    SetSchedulerUpdateNeeded(kernel);
+}
+
+bool KScheduler::CanSchedule(KernelCore& kernel) {
+    return kernel.CurrentScheduler()->GetCurrentThread()->GetDisableDispatchCount() <= 1;
+}
+
+bool KScheduler::IsSchedulerUpdateNeeded(const KernelCore& kernel) {
+    return kernel.GlobalSchedulerContext().scheduler_update_needed.load(std::memory_order_acquire);
+}
+
+void KScheduler::SetSchedulerUpdateNeeded(KernelCore& kernel) {
+    kernel.GlobalSchedulerContext().scheduler_update_needed.store(true, std::memory_order_release);
+}
+
+void KScheduler::ClearSchedulerUpdateNeeded(KernelCore& kernel) {
+    kernel.GlobalSchedulerContext().scheduler_update_needed.store(false, std::memory_order_release);
+}
+
+void KScheduler::DisableScheduling(KernelCore& kernel) {
+    if (auto* scheduler = kernel.CurrentScheduler(); scheduler) {
+        ASSERT(scheduler->GetCurrentThread()->GetDisableDispatchCount() >= 0);
+        scheduler->GetCurrentThread()->DisableDispatch();
+    }
+}
+
+void KScheduler::EnableScheduling(KernelCore& kernel, u64 cores_needing_scheduling,
+                                  Core::EmuThreadHandle global_thread) {
+    if (auto* scheduler = kernel.CurrentScheduler(); scheduler) {
+        scheduler->GetCurrentThread()->EnableDispatch();
+    }
+    RescheduleCores(kernel, cores_needing_scheduling, global_thread);
+}
+
+u64 KScheduler::UpdateHighestPriorityThreads(KernelCore& kernel) {
+    if (IsSchedulerUpdateNeeded(kernel)) {
+        return UpdateHighestPriorityThreadsImpl(kernel);
+    } else {
+        return 0;
+    }
+}
+
+KSchedulerPriorityQueue& KScheduler::GetPriorityQueue(KernelCore& kernel) {
+    return kernel.GlobalSchedulerContext().priority_queue;
+}
+
+void KScheduler::YieldWithoutCoreMigration() {
+    auto& kernel = system.Kernel();
+
+    // Validate preconditions.
+    ASSERT(CanSchedule(kernel));
+    ASSERT(kernel.CurrentProcess() != nullptr);
+
+    // Get the current thread and process.
+    Thread& cur_thread = *GetCurrentThread();
+    Process& cur_process = *kernel.CurrentProcess();
+
+    // If the thread's yield count matches, there's nothing for us to do.
+    if (cur_thread.GetYieldScheduleCount() == cur_process.GetScheduledCount()) {
+        return;
+    }
+
+    // Get a reference to the priority queue.
+    auto& priority_queue = GetPriorityQueue(kernel);
+
+    // Perform the yield.
+    {
+        KScopedSchedulerLock lock(kernel);
+
+        const auto cur_state = cur_thread.GetRawState();
+        if (cur_state == ThreadState::Runnable) {
+            // Put the current thread at the back of the queue.
+            Thread* next_thread = priority_queue.MoveToScheduledBack(std::addressof(cur_thread));
+            IncrementScheduledCount(std::addressof(cur_thread));
+
+            // If the next thread is different, we have an update to perform.
+            if (next_thread != std::addressof(cur_thread)) {
+                SetSchedulerUpdateNeeded(kernel);
+            } else {
+                // Otherwise, set the thread's yield count so that we won't waste work until the
+                // process is scheduled again.
+                cur_thread.SetYieldScheduleCount(cur_process.GetScheduledCount());
+            }
+        }
+    }
+}
+
+void KScheduler::YieldWithCoreMigration() {
+    auto& kernel = system.Kernel();
+
+    // Validate preconditions.
+    ASSERT(CanSchedule(kernel));
+    ASSERT(kernel.CurrentProcess() != nullptr);
+
+    // Get the current thread and process.
+    Thread& cur_thread = *GetCurrentThread();
+    Process& cur_process = *kernel.CurrentProcess();
+
+    // If the thread's yield count matches, there's nothing for us to do.
+    if (cur_thread.GetYieldScheduleCount() == cur_process.GetScheduledCount()) {
+        return;
+    }
+
+    // Get a reference to the priority queue.
+    auto& priority_queue = GetPriorityQueue(kernel);
+
+    // Perform the yield.
+    {
+        KScopedSchedulerLock lock(kernel);
+
+        const auto cur_state = cur_thread.GetRawState();
+        if (cur_state == ThreadState::Runnable) {
+            // Get the current active core.
+            const s32 core_id = cur_thread.GetActiveCore();
+
+            // Put the current thread at the back of the queue.
+            Thread* next_thread = priority_queue.MoveToScheduledBack(std::addressof(cur_thread));
+            IncrementScheduledCount(std::addressof(cur_thread));
+
+            // While we have a suggested thread, try to migrate it!
+            bool recheck = false;
+            Thread* suggested = priority_queue.GetSuggestedFront(core_id);
+            while (suggested != nullptr) {
+                // Check if the suggested thread is the thread running on its core.
+                const s32 suggested_core = suggested->GetActiveCore();
+
+                if (Thread* running_on_suggested_core =
+                        (suggested_core >= 0)
+                            ? kernel.Scheduler(suggested_core).state.highest_priority_thread
+                            : nullptr;
+                    running_on_suggested_core != suggested) {
+                    // If the current thread's priority is higher than our suggestion's we prefer
+                    // the next thread to the suggestion. We also prefer the next thread when the
+                    // current thread's priority is equal to the suggestions, but the next thread
+                    // has been waiting longer.
+                    if ((suggested->GetPriority() > cur_thread.GetPriority()) ||
+                        (suggested->GetPriority() == cur_thread.GetPriority() &&
+                         next_thread != std::addressof(cur_thread) &&
+                         next_thread->GetLastScheduledTick() < suggested->GetLastScheduledTick())) {
+                        suggested = nullptr;
+                        break;
+                    }
+
+                    // If we're allowed to do a migration, do one.
+                    // NOTE: Unlike migrations in UpdateHighestPriorityThread, this moves the
+                    // suggestion to the front of the queue.
+                    if (running_on_suggested_core == nullptr ||
+                        running_on_suggested_core->GetPriority() >=
+                            HighestCoreMigrationAllowedPriority) {
+                        suggested->SetActiveCore(core_id);
+                        priority_queue.ChangeCore(suggested_core, suggested, true);
+                        IncrementScheduledCount(suggested);
+                        break;
+                    } else {
+                        // We couldn't perform a migration, but we should check again on a future
+                        // yield.
+                        recheck = true;
+                    }
+                }
+
+                // Get the next suggestion.
+                suggested = priority_queue.GetSuggestedNext(core_id, suggested);
+            }
+
+            // If we still have a suggestion or the next thread is different, we have an update to
+            // perform.
+            if (suggested != nullptr || next_thread != std::addressof(cur_thread)) {
+                SetSchedulerUpdateNeeded(kernel);
+            } else if (!recheck) {
+                // Otherwise if we don't need to re-check, set the thread's yield count so that we
+                // won't waste work until the process is scheduled again.
+                cur_thread.SetYieldScheduleCount(cur_process.GetScheduledCount());
+            }
+        }
+    }
+}
+
+void KScheduler::YieldToAnyThread() {
+    auto& kernel = system.Kernel();
+
+    // Validate preconditions.
+    ASSERT(CanSchedule(kernel));
+    ASSERT(kernel.CurrentProcess() != nullptr);
+
+    // Get the current thread and process.
+    Thread& cur_thread = *GetCurrentThread();
+    Process& cur_process = *kernel.CurrentProcess();
+
+    // If the thread's yield count matches, there's nothing for us to do.
+    if (cur_thread.GetYieldScheduleCount() == cur_process.GetScheduledCount()) {
+        return;
+    }
+
+    // Get a reference to the priority queue.
+    auto& priority_queue = GetPriorityQueue(kernel);
+
+    // Perform the yield.
+    {
+        KScopedSchedulerLock lock(kernel);
+
+        const auto cur_state = cur_thread.GetRawState();
+        if (cur_state == ThreadState::Runnable) {
+            // Get the current active core.
+            const s32 core_id = cur_thread.GetActiveCore();
+
+            // Migrate the current thread to core -1.
+            cur_thread.SetActiveCore(-1);
+            priority_queue.ChangeCore(core_id, std::addressof(cur_thread));
+            IncrementScheduledCount(std::addressof(cur_thread));
+
+            // If there's nothing scheduled, we can try to perform a migration.
+            if (priority_queue.GetScheduledFront(core_id) == nullptr) {
+                // While we have a suggested thread, try to migrate it!
+                Thread* suggested = priority_queue.GetSuggestedFront(core_id);
+                while (suggested != nullptr) {
+                    // Check if the suggested thread is the top thread on its core.
+                    const s32 suggested_core = suggested->GetActiveCore();
+                    if (Thread* top_on_suggested_core =
+                            (suggested_core >= 0) ? priority_queue.GetScheduledFront(suggested_core)
+                                                  : nullptr;
+                        top_on_suggested_core != suggested) {
+                        // If we're allowed to do a migration, do one.
+                        if (top_on_suggested_core == nullptr ||
+                            top_on_suggested_core->GetPriority() >=
+                                HighestCoreMigrationAllowedPriority) {
+                            suggested->SetActiveCore(core_id);
+                            priority_queue.ChangeCore(suggested_core, suggested);
+                            IncrementScheduledCount(suggested);
+                        }
+
+                        // Regardless of whether we migrated, we had a candidate, so we're done.
+                        break;
+                    }
+
+                    // Get the next suggestion.
+                    suggested = priority_queue.GetSuggestedNext(core_id, suggested);
+                }
+
+                // If the suggestion is different from the current thread, we need to perform an
+                // update.
+                if (suggested != std::addressof(cur_thread)) {
+                    SetSchedulerUpdateNeeded(kernel);
+                } else {
+                    // Otherwise, set the thread's yield count so that we won't waste work until the
+                    // process is scheduled again.
+                    cur_thread.SetYieldScheduleCount(cur_process.GetScheduledCount());
+                }
+            } else {
+                // Otherwise, we have an update to perform.
+                SetSchedulerUpdateNeeded(kernel);
+            }
+        }
+    }
+}
+
+KScheduler::KScheduler(Core::System& system, std::size_t core_id)
+    : system(system), core_id(core_id) {
+    switch_fiber = std::make_shared<Common::Fiber>(OnSwitch, this);
+    this->state.needs_scheduling = true;
+    this->state.interrupt_task_thread_runnable = false;
+    this->state.should_count_idle = false;
+    this->state.idle_count = 0;
+    this->state.idle_thread_stack = nullptr;
+    this->state.highest_priority_thread = nullptr;
+}
+
+KScheduler::~KScheduler() = default;
+
+Thread* KScheduler::GetCurrentThread() const {
+    if (current_thread) {
+        return current_thread;
+    }
+    return idle_thread;
+}
+
+u64 KScheduler::GetLastContextSwitchTicks() const {
+    return last_context_switch_time;
+}
+
+void KScheduler::RescheduleCurrentCore() {
+    ASSERT(GetCurrentThread()->GetDisableDispatchCount() == 1);
+
+    auto& phys_core = system.Kernel().PhysicalCore(core_id);
+    if (phys_core.IsInterrupted()) {
+        phys_core.ClearInterrupt();
+    }
+    guard.lock();
+    if (this->state.needs_scheduling) {
+        Schedule();
+    } else {
+        guard.unlock();
+    }
+}
+
+void KScheduler::OnThreadStart() {
+    SwitchContextStep2();
+}
+
+void KScheduler::Unload(Thread* thread) {
+    if (thread) {
+        thread->SetIsRunning(false);
+        if (thread->IsContinuousOnSVC() && !thread->IsHLEThread()) {
+            system.ArmInterface(core_id).ExceptionalExit();
+            thread->SetContinuousOnSVC(false);
+        }
+        if (!thread->IsHLEThread() && !thread->HasExited()) {
+            Core::ARM_Interface& cpu_core = system.ArmInterface(core_id);
+            cpu_core.SaveContext(thread->GetContext32());
+            cpu_core.SaveContext(thread->GetContext64());
+            // Save the TPIDR_EL0 system register in case it was modified.
+            thread->SetTPIDR_EL0(cpu_core.GetTPIDR_EL0());
+            cpu_core.ClearExclusiveState();
+        }
+        thread->context_guard.unlock();
+    }
+}
+
+void KScheduler::Reload(Thread* thread) {
+    if (thread) {
+        ASSERT_MSG(thread->GetState() == ThreadState::Runnable, "Thread must be runnable.");
+
+        // Cancel any outstanding wakeup events for this thread
+        thread->SetIsRunning(true);
+        thread->SetWasRunning(false);
+
+        auto* const thread_owner_process = thread->GetOwnerProcess();
+        if (thread_owner_process != nullptr) {
+            system.Kernel().MakeCurrentProcess(thread_owner_process);
+        }
+        if (!thread->IsHLEThread()) {
+            Core::ARM_Interface& cpu_core = system.ArmInterface(core_id);
+            cpu_core.LoadContext(thread->GetContext32());
+            cpu_core.LoadContext(thread->GetContext64());
+            cpu_core.SetTlsAddress(thread->GetTLSAddress());
+            cpu_core.SetTPIDR_EL0(thread->GetTPIDR_EL0());
+            cpu_core.ClearExclusiveState();
+        }
+    }
+}
+
+void KScheduler::SwitchContextStep2() {
+    // Load context of new thread
+    Reload(current_thread);
+
+    RescheduleCurrentCore();
+}
+
+void KScheduler::ScheduleImpl() {
+    Thread* previous_thread = current_thread;
+    current_thread = state.highest_priority_thread;
+
+    this->state.needs_scheduling = false;
+
+    if (current_thread == previous_thread) {
+        guard.unlock();
+        return;
+    }
+
+    Process* const previous_process = system.Kernel().CurrentProcess();
+
+    UpdateLastContextSwitchTime(previous_thread, previous_process);
+
+    // Save context for previous thread
+    Unload(previous_thread);
+
+    std::shared_ptr<Common::Fiber>* old_context;
+    if (previous_thread != nullptr) {
+        old_context = &previous_thread->GetHostContext();
+    } else {
+        old_context = &idle_thread->GetHostContext();
+    }
+    guard.unlock();
+
+    Common::Fiber::YieldTo(*old_context, switch_fiber);
+    /// When a thread wakes up, the scheduler may have changed to other in another core.
+    auto& next_scheduler = *system.Kernel().CurrentScheduler();
+    next_scheduler.SwitchContextStep2();
+}
+
+void KScheduler::OnSwitch(void* this_scheduler) {
+    KScheduler* sched = static_cast<KScheduler*>(this_scheduler);
+    sched->SwitchToCurrent();
+}
+
+void KScheduler::SwitchToCurrent() {
+    while (true) {
+        {
+            std::scoped_lock lock{guard};
+            current_thread = state.highest_priority_thread;
+            this->state.needs_scheduling = false;
+        }
+        const auto is_switch_pending = [this] {
+            std::scoped_lock lock{guard};
+            return state.needs_scheduling.load(std::memory_order_relaxed);
+        };
+        do {
+            if (current_thread != nullptr && !current_thread->IsHLEThread()) {
+                current_thread->context_guard.lock();
+                if (current_thread->GetRawState() != ThreadState::Runnable) {
+                    current_thread->context_guard.unlock();
+                    break;
+                }
+                if (static_cast<u32>(current_thread->GetProcessorID()) != core_id) {
+                    current_thread->context_guard.unlock();
+                    break;
+                }
+            }
+            std::shared_ptr<Common::Fiber>* next_context;
+            if (current_thread != nullptr) {
+                next_context = &current_thread->GetHostContext();
+            } else {
+                next_context = &idle_thread->GetHostContext();
+            }
+            Common::Fiber::YieldTo(switch_fiber, *next_context);
+        } while (!is_switch_pending());
+    }
+}
+
+void KScheduler::UpdateLastContextSwitchTime(Thread* thread, Process* process) {
+    const u64 prev_switch_ticks = last_context_switch_time;
+    const u64 most_recent_switch_ticks = system.CoreTiming().GetCPUTicks();
+    const u64 update_ticks = most_recent_switch_ticks - prev_switch_ticks;
+
+    if (thread != nullptr) {
+        thread->UpdateCPUTimeTicks(update_ticks);
+    }
+
+    if (process != nullptr) {
+        process->UpdateCPUTimeTicks(update_ticks);
+    }
+
+    last_context_switch_time = most_recent_switch_ticks;
+}
+
+void KScheduler::Initialize() {
+    std::string name = "Idle Thread Id:" + std::to_string(core_id);
+    std::function<void(void*)> init_func = Core::CpuManager::GetIdleThreadStartFunc();
+    void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater();
+    ThreadType type = static_cast<ThreadType>(THREADTYPE_KERNEL | THREADTYPE_HLE | THREADTYPE_IDLE);
+    auto thread_res = Thread::Create(system, type, name, 0, 64, 0, static_cast<u32>(core_id), 0,
+                                     nullptr, std::move(init_func), init_func_parameter);
+    idle_thread = thread_res.Unwrap().get();
+
+    {
+        KScopedSchedulerLock lock{system.Kernel()};
+        idle_thread->SetState(ThreadState::Runnable);
+    }
+}
+
+KScopedSchedulerLock::KScopedSchedulerLock(KernelCore& kernel)
+    : KScopedLock(kernel.GlobalSchedulerContext().SchedulerLock()) {}
+
+KScopedSchedulerLock::~KScopedSchedulerLock() = default;
+
+} // namespace Kernel

src/core/hle/kernel/k_scheduler.h

@@ -0,0 +1,200 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include <atomic>
+
+#include "common/common_types.h"
+#include "common/spin_lock.h"
+#include "core/hle/kernel/global_scheduler_context.h"
+#include "core/hle/kernel/k_priority_queue.h"
+#include "core/hle/kernel/k_scheduler_lock.h"
+#include "core/hle/kernel/k_scoped_lock.h"
+
+namespace Common {
+class Fiber;
+}
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+
+class KernelCore;
+class Process;
+class SchedulerLock;
+class Thread;
+
+class KScheduler final {
+public:
+    explicit KScheduler(Core::System& system, std::size_t core_id);
+    ~KScheduler();
+
+    /// Reschedules to the next available thread (call after current thread is suspended)
+    void RescheduleCurrentCore();
+
+    /// Reschedules cores pending reschedule, to be called on EnableScheduling.
+    static void RescheduleCores(KernelCore& kernel, u64 cores_pending_reschedule,
+                                Core::EmuThreadHandle global_thread);
+
+    /// The next two are for SingleCore Only.
+    /// Unload current thread before preempting core.
+    void Unload(Thread* thread);
+
+    /// Reload current thread after core preemption.
+    void Reload(Thread* thread);
+
+    /// Gets the current running thread
+    [[nodiscard]] Thread* GetCurrentThread() const;
+
+    /// Gets the timestamp for the last context switch in ticks.
+    [[nodiscard]] u64 GetLastContextSwitchTicks() const;
+
+    [[nodiscard]] bool ContextSwitchPending() const {
+        return state.needs_scheduling.load(std::memory_order_relaxed);
+    }
+
+    void Initialize();
+
+    void OnThreadStart();
+
+    [[nodiscard]] std::shared_ptr<Common::Fiber>& ControlContext() {
+        return switch_fiber;
+    }
+
+    [[nodiscard]] const std::shared_ptr<Common::Fiber>& ControlContext() const {
+        return switch_fiber;
+    }
+
+    [[nodiscard]] u64 UpdateHighestPriorityThread(Thread* highest_thread);
+
+    /**
+     * Takes a thread and moves it to the back of the it's priority list.
+     *
+     * @note This operation can be redundant and no scheduling is changed if marked as so.
+     */
+    void YieldWithoutCoreMigration();
+
+    /**
+     * Takes a thread and moves it to the back of the it's priority list.
+     * Afterwards, tries to pick a suggested thread from the suggested queue that has worse time or
+     * a better priority than the next thread in the core.
+     *
+     * @note This operation can be redundant and no scheduling is changed if marked as so.
+     */
+    void YieldWithCoreMigration();
+
+    /**
+     * Takes a thread and moves it out of the scheduling queue.
+     * and into the suggested queue. If no thread can be scheduled afterwards in that core,
+     * a suggested thread is obtained instead.
+     *
+     * @note This operation can be redundant and no scheduling is changed if marked as so.
+     */
+    void YieldToAnyThread();
+
+    /// Notify the scheduler a thread's status has changed.
+    static void OnThreadStateChanged(KernelCore& kernel, Thread* thread, ThreadState old_state);
+
+    /// Notify the scheduler a thread's priority has changed.
+    static void OnThreadPriorityChanged(KernelCore& kernel, Thread* thread, s32 old_priority);
+
+    /// Notify the scheduler a thread's core and/or affinity mask has changed.
+    static void OnThreadAffinityMaskChanged(KernelCore& kernel, Thread* thread,
+                                            const KAffinityMask& old_affinity, s32 old_core);
+
+    static bool CanSchedule(KernelCore& kernel);
+    static bool IsSchedulerUpdateNeeded(const KernelCore& kernel);
+    static void SetSchedulerUpdateNeeded(KernelCore& kernel);
+    static void ClearSchedulerUpdateNeeded(KernelCore& kernel);
+    static void DisableScheduling(KernelCore& kernel);
+    static void EnableScheduling(KernelCore& kernel, u64 cores_needing_scheduling,
+                                 Core::EmuThreadHandle global_thread);
+    [[nodiscard]] static u64 UpdateHighestPriorityThreads(KernelCore& kernel);
+
+private:
+    friend class GlobalSchedulerContext;
+
+    /**
+     * Takes care of selecting the new scheduled threads in three steps:
+     *
+     * 1. First a thread is selected from the top of the priority queue. If no thread
+     *    is obtained then we move to step two, else we are done.
+     *
+     * 2. Second we try to get a suggested thread that's not assigned to any core or
+     *    that is not the top thread in that core.
+     *
+     * 3. Third is no suggested thread is found, we do a second pass and pick a running
+     *    thread in another core and swap it with its current thread.
+     *
+     * returns the cores needing scheduling.
+     */
+    [[nodiscard]] static u64 UpdateHighestPriorityThreadsImpl(KernelCore& kernel);
+
+    [[nodiscard]] static KSchedulerPriorityQueue& GetPriorityQueue(KernelCore& kernel);
+
+    void RotateScheduledQueue(s32 core_id, s32 priority);
+
+    void Schedule() {
+        ASSERT(GetCurrentThread()->GetDisableDispatchCount() == 1);
+        this->ScheduleImpl();
+    }
+
+    /// Switches the CPU's active thread context to that of the specified thread
+    void ScheduleImpl();
+
+    /// When a thread wakes up, it must run this through it's new scheduler
+    void SwitchContextStep2();
+
+    /**
+     * Called on every context switch to update the internal timestamp
+     * This also updates the running time ticks for the given thread and
+     * process using the following difference:
+     *
+     * ticks += most_recent_ticks - last_context_switch_ticks
+     *
+     * The internal tick timestamp for the scheduler is simply the
+     * most recent tick count retrieved. No special arithmetic is
+     * applied to it.
+     */
+    void UpdateLastContextSwitchTime(Thread* thread, Process* process);
+
+    static void OnSwitch(void* this_scheduler);
+    void SwitchToCurrent();
+
+    Thread* current_thread{};
+    Thread* idle_thread{};
+
+    std::shared_ptr<Common::Fiber> switch_fiber{};
+
+    struct SchedulingState {
+        std::atomic<bool> needs_scheduling;
+        bool interrupt_task_thread_runnable{};
+        bool should_count_idle{};
+        u64 idle_count{};
+        Thread* highest_priority_thread{};
+        void* idle_thread_stack{};
+    };
+
+    SchedulingState state;
+
+    Core::System& system;
+    u64 last_context_switch_time{};
+    const std::size_t core_id;
+
+    Common::SpinLock guard{};
+};
+
+class KScopedSchedulerLock : KScopedLock<GlobalSchedulerContext::LockType> {
+public:
+    explicit KScopedSchedulerLock(KernelCore& kernel);
+    ~KScopedSchedulerLock();
+};
+
+} // namespace Kernel

src/core/hle/kernel/k_scheduler_lock.h

@@ -0,0 +1,75 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include "common/assert.h"
+#include "common/spin_lock.h"
+#include "core/hardware_properties.h"
+#include "core/hle/kernel/kernel.h"
+
+namespace Kernel {
+
+class KernelCore;
+
+template <typename SchedulerType>
+class KAbstractSchedulerLock {
+public:
+    explicit KAbstractSchedulerLock(KernelCore& kernel_) : kernel{kernel_} {}
+
+    bool IsLockedByCurrentThread() const {
+        return this->owner_thread == kernel.GetCurrentEmuThreadID();
+    }
+
+    void Lock() {
+        if (this->IsLockedByCurrentThread()) {
+            // If we already own the lock, we can just increment the count.
+            ASSERT(this->lock_count > 0);
+            this->lock_count++;
+        } else {
+            // Otherwise, we want to disable scheduling and acquire the spinlock.
+            SchedulerType::DisableScheduling(kernel);
+            this->spin_lock.lock();
+
+            // For debug, ensure that our state is valid.
+            ASSERT(this->lock_count == 0);
+            ASSERT(this->owner_thread == Core::EmuThreadHandle::InvalidHandle());
+
+            // Increment count, take ownership.
+            this->lock_count = 1;
+            this->owner_thread = kernel.GetCurrentEmuThreadID();
+        }
+    }
+
+    void Unlock() {
+        ASSERT(this->IsLockedByCurrentThread());
+        ASSERT(this->lock_count > 0);
+
+        // Release an instance of the lock.
+        if ((--this->lock_count) == 0) {
+            // We're no longer going to hold the lock. Take note of what cores need scheduling.
+            const u64 cores_needing_scheduling =
+                SchedulerType::UpdateHighestPriorityThreads(kernel);
+            Core::EmuThreadHandle leaving_thread = owner_thread;
+
+            // Note that we no longer hold the lock, and unlock the spinlock.
+            this->owner_thread = Core::EmuThreadHandle::InvalidHandle();
+            this->spin_lock.unlock();
+
+            // Enable scheduling, and perform a rescheduling operation.
+            SchedulerType::EnableScheduling(kernel, cores_needing_scheduling, leaving_thread);
+        }
+    }
+
+private:
+    KernelCore& kernel;
+    Common::SpinLock spin_lock{};
+    s32 lock_count{};
+    Core::EmuThreadHandle owner_thread{Core::EmuThreadHandle::InvalidHandle()};
+};
+
+} // namespace Kernel

src/core/hle/kernel/k_scoped_lock.h

@@ -0,0 +1,41 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel {
+
+template <typename T>
+concept KLockable = !std::is_reference_v<T> && requires(T & t) {
+    { t.Lock() }
+    ->std::same_as<void>;
+    { t.Unlock() }
+    ->std::same_as<void>;
+};
+
+template <typename T>
+requires KLockable<T> class KScopedLock {
+public:
+    explicit KScopedLock(T* l) : lock_ptr(l) {
+        this->lock_ptr->Lock();
+    }
+    explicit KScopedLock(T& l) : KScopedLock(std::addressof(l)) { /* ... */
+    }
+    ~KScopedLock() {
+        this->lock_ptr->Unlock();
+    }
+
+    KScopedLock(const KScopedLock&) = delete;
+    KScopedLock(KScopedLock&&) = delete;
+
+private:
+    T* lock_ptr;
+};
+
+} // namespace Kernel

src/core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h

@@ -0,0 +1,50 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "core/hle/kernel/handle_table.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/thread.h"
+#include "core/hle/kernel/time_manager.h"
+
+namespace Kernel {
+
+class KScopedSchedulerLockAndSleep {
+public:
+    explicit KScopedSchedulerLockAndSleep(KernelCore& kernel, Handle& event_handle, Thread* t,
+                                          s64 timeout)
+        : kernel(kernel), event_handle(event_handle), thread(t), timeout_tick(timeout) {
+        event_handle = InvalidHandle;
+
+        // Lock the scheduler.
+        kernel.GlobalSchedulerContext().scheduler_lock.Lock();
+    }
+
+    ~KScopedSchedulerLockAndSleep() {
+        // Register the sleep.
+        if (this->timeout_tick > 0) {
+            kernel.TimeManager().ScheduleTimeEvent(event_handle, this->thread, this->timeout_tick);
+        }
+
+        // Unlock the scheduler.
+        kernel.GlobalSchedulerContext().scheduler_lock.Unlock();
+    }
+
+    void CancelSleep() {
+        this->timeout_tick = 0;
+    }
+
+private:
+    KernelCore& kernel;
+    Handle& event_handle;
+    Thread* thread{};
+    s64 timeout_tick{};
+};
+
+} // namespace Kernel

src/core/hle/kernel/k_synchronization_object.cpp

@@ -0,0 +1,172 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/k_scheduler.h"
+#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
+#include "core/hle/kernel/k_synchronization_object.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/svc_results.h"
+#include "core/hle/kernel/thread.h"
+
+namespace Kernel {
+
+ResultCode KSynchronizationObject::Wait(KernelCore& kernel, s32* out_index,
+                                        KSynchronizationObject** objects, const s32 num_objects,
+                                        s64 timeout) {
+    // Allocate space on stack for thread nodes.
+    std::vector<ThreadListNode> thread_nodes(num_objects);
+
+    // Prepare for wait.
+    Thread* thread = kernel.CurrentScheduler()->GetCurrentThread();
+    Handle timer = InvalidHandle;
+
+    {
+        // Setup the scheduling lock and sleep.
+        KScopedSchedulerLockAndSleep slp(kernel, timer, thread, timeout);
+
+        // Check if any of the objects are already signaled.
+        for (auto i = 0; i < num_objects; ++i) {
+            ASSERT(objects[i] != nullptr);
+
+            if (objects[i]->IsSignaled()) {
+                *out_index = i;
+                slp.CancelSleep();
+                return RESULT_SUCCESS;
+            }
+        }
+
+        // Check if the timeout is zero.
+        if (timeout == 0) {
+            slp.CancelSleep();
+            return Svc::ResultTimedOut;
+        }
+
+        // Check if the thread should terminate.
+        if (thread->IsTerminationRequested()) {
+            slp.CancelSleep();
+            return Svc::ResultTerminationRequested;
+        }
+
+        // Check if waiting was canceled.
+        if (thread->IsWaitCancelled()) {
+            slp.CancelSleep();
+            thread->ClearWaitCancelled();
+            return Svc::ResultCancelled;
+        }
+
+        // Add the waiters.
+        for (auto i = 0; i < num_objects; ++i) {
+            thread_nodes[i].thread = thread;
+            thread_nodes[i].next = nullptr;
+
+            if (objects[i]->thread_list_tail == nullptr) {
+                objects[i]->thread_list_head = std::addressof(thread_nodes[i]);
+            } else {
+                objects[i]->thread_list_tail->next = std::addressof(thread_nodes[i]);
+            }
+
+            objects[i]->thread_list_tail = std::addressof(thread_nodes[i]);
+        }
+
+        // For debugging only
+        thread->SetWaitObjectsForDebugging({objects, static_cast<std::size_t>(num_objects)});
+
+        // Mark the thread as waiting.
+        thread->SetCancellable();
+        thread->SetSyncedObject(nullptr, Svc::ResultTimedOut);
+        thread->SetState(ThreadState::Waiting);
+        thread->SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::Synchronization);
+    }
+
+    // The lock/sleep is done, so we should be able to get our result.
+
+    // Thread is no longer cancellable.
+    thread->ClearCancellable();
+
+    // For debugging only
+    thread->SetWaitObjectsForDebugging({});
+
+    // Cancel the timer as needed.
+    if (timer != InvalidHandle) {
+        auto& time_manager = kernel.TimeManager();
+        time_manager.UnscheduleTimeEvent(timer);
+    }
+
+    // Get the wait result.
+    ResultCode wait_result{RESULT_SUCCESS};
+    s32 sync_index = -1;
+    {
+        KScopedSchedulerLock lock(kernel);
+        KSynchronizationObject* synced_obj;
+        wait_result = thread->GetWaitResult(std::addressof(synced_obj));
+
+        for (auto i = 0; i < num_objects; ++i) {
+            // Unlink the object from the list.
+            ThreadListNode* prev_ptr =
+                reinterpret_cast<ThreadListNode*>(std::addressof(objects[i]->thread_list_head));
+            ThreadListNode* prev_val = nullptr;
+            ThreadListNode *prev, *tail_prev;
+
+            do {
+                prev = prev_ptr;
+                prev_ptr = prev_ptr->next;
+                tail_prev = prev_val;
+                prev_val = prev_ptr;
+            } while (prev_ptr != std::addressof(thread_nodes[i]));
+
+            if (objects[i]->thread_list_tail == std::addressof(thread_nodes[i])) {
+                objects[i]->thread_list_tail = tail_prev;
+            }
+
+            prev->next = thread_nodes[i].next;
+
+            if (objects[i] == synced_obj) {
+                sync_index = i;
+            }
+        }
+    }
+
+    // Set output.
+    *out_index = sync_index;
+    return wait_result;
+}
+
+KSynchronizationObject::KSynchronizationObject(KernelCore& kernel) : Object{kernel} {}
+
+KSynchronizationObject ::~KSynchronizationObject() = default;
+
+void KSynchronizationObject::NotifyAvailable(ResultCode result) {
+    KScopedSchedulerLock lock(kernel);
+
+    // If we're not signaled, we've nothing to notify.
+    if (!this->IsSignaled()) {
+        return;
+    }
+
+    // Iterate over each thread.
+    for (auto* cur_node = thread_list_head; cur_node != nullptr; cur_node = cur_node->next) {
+        Thread* thread = cur_node->thread;
+        if (thread->GetState() == ThreadState::Waiting) {
+            thread->SetSyncedObject(this, result);
+            thread->SetState(ThreadState::Runnable);
+        }
+    }
+}
+
+std::vector<Thread*> KSynchronizationObject::GetWaitingThreadsForDebugging() const {
+    std::vector<Thread*> threads;
+
+    // If debugging, dump the list of waiters.
+    {
+        KScopedSchedulerLock lock(kernel);
+        for (auto* cur_node = thread_list_head; cur_node != nullptr; cur_node = cur_node->next) {
+            threads.emplace_back(cur_node->thread);
+        }
+    }
+
+    return threads;
+}
+} // namespace Kernel

src/core/hle/kernel/k_synchronization_object.h

@@ -0,0 +1,58 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+
+#include "core/hle/kernel/object.h"
+#include "core/hle/result.h"
+
+namespace Kernel {
+
+class KernelCore;
+class Synchronization;
+class Thread;
+
+/// Class that represents a Kernel object that a thread can be waiting on
+class KSynchronizationObject : public Object {
+public:
+    struct ThreadListNode {
+        ThreadListNode* next{};
+        Thread* thread{};
+    };
+
+    [[nodiscard]] static ResultCode Wait(KernelCore& kernel, s32* out_index,
+                                         KSynchronizationObject** objects, const s32 num_objects,
+                                         s64 timeout);
+
+    [[nodiscard]] virtual bool IsSignaled() const = 0;
+
+    [[nodiscard]] std::vector<Thread*> GetWaitingThreadsForDebugging() const;
+
+protected:
+    explicit KSynchronizationObject(KernelCore& kernel);
+    virtual ~KSynchronizationObject();
+
+    void NotifyAvailable(ResultCode result);
+    void NotifyAvailable() {
+        return this->NotifyAvailable(RESULT_SUCCESS);
+    }
+
+private:
+    ThreadListNode* thread_list_head{};
+    ThreadListNode* thread_list_tail{};
+};
+
+// Specialization of DynamicObjectCast for KSynchronizationObjects
+template <>
+inline std::shared_ptr<KSynchronizationObject> DynamicObjectCast<KSynchronizationObject>(
+    std::shared_ptr<Object> object) {
+    if (object != nullptr && object->IsWaitable()) {
+        return std::static_pointer_cast<KSynchronizationObject>(object);
+    }
+    return nullptr;
+}
+
+} // namespace Kernel

src/core/hle/kernel/kernel.cpp

@@ -8,13 +8,14 @@
 #include <functional>
 #include <memory>
 #include <thread>
-#include <unordered_map>
+#include <unordered_set>
 #include <utility>
 
 #include "common/assert.h"
 #include "common/logging/log.h"
 #include "common/microprofile.h"
 #include "common/thread.h"
+#include "common/thread_worker.h"
 #include "core/arm/arm_interface.h"
 #include "core/arm/cpu_interrupt_handler.h"
 #include "core/arm/exclusive_monitor.h"
@@ -27,6 +28,7 @@
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/handle_table.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/memory/memory_layout.h"
 #include "core/hle/kernel/memory/memory_manager.h"
@@ -34,9 +36,8 @@
 #include "core/hle/kernel/physical_core.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/resource_limit.h"
-#include "core/hle/kernel/scheduler.h"
+#include "core/hle/kernel/service_thread.h"
 #include "core/hle/kernel/shared_memory.h"
-#include "core/hle/kernel/synchronization.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/time_manager.h"
 #include "core/hle/lock.h"
@@ -49,17 +50,19 @@ namespace Kernel {
 
 struct KernelCore::Impl {
     explicit Impl(Core::System& system, KernelCore& kernel)
-        : global_scheduler{kernel}, synchronization{system}, time_manager{system},
-          global_handle_table{kernel}, system{system} {}
+        : time_manager{system}, global_handle_table{kernel}, system{system} {}
 
     void SetMulticore(bool is_multicore) {
         this->is_multicore = is_multicore;
     }
 
     void Initialize(KernelCore& kernel) {
-        Shutdown();
         RegisterHostThread();
 
+        global_scheduler_context = std::make_unique<Kernel::GlobalSchedulerContext>(kernel);
+        service_thread_manager =
+            std::make_unique<Common::ThreadWorker>(1, "yuzu:ServiceThreadManager");
+
         InitializePhysicalCores();
         InitializeSystemResourceLimit(kernel);
         InitializeMemoryLayout();
@@ -75,6 +78,12 @@ struct KernelCore::Impl {
     }
 
     void Shutdown() {
+        process_list.clear();
+
+        // Ensures all service threads gracefully shutdown
+        service_thread_manager.reset();
+        service_threads.clear();
+
         next_object_id = 0;
         next_kernel_process_id = Process::InitialKIPIDMin;
         next_user_process_id = Process::ProcessIDMin;
@@ -86,42 +95,29 @@ struct KernelCore::Impl {
             }
         }
 
-        for (std::size_t i = 0; i < cores.size(); i++) {
-            cores[i].Shutdown();
-            schedulers[i].reset();
-        }
         cores.clear();
 
-        process_list.clear();
         current_process = nullptr;
 
         system_resource_limit = nullptr;
 
         global_handle_table.Clear();
-        preemption_event = nullptr;
 
-        global_scheduler.Shutdown();
+        preemption_event = nullptr;
 
         named_ports.clear();
 
-        for (auto& core : cores) {
-            core.Shutdown();
-        }
-        cores.clear();
-
         exclusive_monitor.reset();
 
-        num_host_threads = 0;
-        std::fill(register_host_thread_keys.begin(), register_host_thread_keys.end(),
-                  std::thread::id{});
-        std::fill(register_host_thread_values.begin(), register_host_thread_values.end(), 0);
+        // Next host thead ID to use, 0-3 IDs represent core threads, >3 represent others
+        next_host_thread_id = Core::Hardware::NUM_CPU_CORES;
     }
 
     void InitializePhysicalCores() {
         exclusive_monitor =
             Core::MakeExclusiveMonitor(system.Memory(), Core::Hardware::NUM_CPU_CORES);
         for (std::size_t i = 0; i < Core::Hardware::NUM_CPU_CORES; i++) {
-            schedulers[i] = std::make_unique<Kernel::Scheduler>(system, i);
+            schedulers[i] = std::make_unique<Kernel::KScheduler>(system, i);
             cores.emplace_back(i, system, *schedulers[i], interrupts);
         }
     }
@@ -154,8 +150,8 @@ struct KernelCore::Impl {
         preemption_event = Core::Timing::CreateEvent(
             "PreemptionCallback", [this, &kernel](std::uintptr_t, std::chrono::nanoseconds) {
                 {
-                    SchedulerLock lock(kernel);
-                    global_scheduler.PreemptThreads();
+                    KScopedSchedulerLock lock(kernel);
+                    global_scheduler_context->PreemptThreads();
                 }
                 const auto time_interval = std::chrono::nanoseconds{
                     Core::Timing::msToCycles(std::chrono::milliseconds(10))};
@@ -194,58 +190,52 @@ struct KernelCore::Impl {
         }
     }
 
+    /// Creates a new host thread ID, should only be called by GetHostThreadId
+    u32 AllocateHostThreadId(std::optional<std::size_t> core_id) {
+        if (core_id) {
+            // The first for slots are reserved for CPU core threads
+            ASSERT(*core_id < Core::Hardware::NUM_CPU_CORES);
+            return static_cast<u32>(*core_id);
+        } else {
+            return next_host_thread_id++;
+        }
+    }
+
+    /// Gets the host thread ID for the caller, allocating a new one if this is the first time
+    u32 GetHostThreadId(std::optional<std::size_t> core_id = std::nullopt) {
+        const thread_local auto host_thread_id{AllocateHostThreadId(core_id)};
+        return host_thread_id;
+    }
+
+    /// Registers a CPU core thread by allocating a host thread ID for it
     void RegisterCoreThread(std::size_t core_id) {
-        const std::thread::id this_id = std::this_thread::get_id();
+        ASSERT(core_id < Core::Hardware::NUM_CPU_CORES);
+        const auto this_id = GetHostThreadId(core_id);
         if (!is_multicore) {
             single_core_thread_id = this_id;
         }
-        const auto end =
-            register_host_thread_keys.begin() + static_cast<ptrdiff_t>(num_host_threads);
-        const auto it = std::find(register_host_thread_keys.begin(), end, this_id);
-        ASSERT(core_id < Core::Hardware::NUM_CPU_CORES);
-        ASSERT(it == end);
-        InsertHostThread(static_cast<u32>(core_id));
     }
 
+    /// Registers a new host thread by allocating a host thread ID for it
     void RegisterHostThread() {
-        const std::thread::id this_id = std::this_thread::get_id();
-        const auto end =
-            register_host_thread_keys.begin() + static_cast<ptrdiff_t>(num_host_threads);
-        const auto it = std::find(register_host_thread_keys.begin(), end, this_id);
-        if (it == end) {
-            InsertHostThread(registered_thread_ids++);
-        }
+        [[maybe_unused]] const auto this_id = GetHostThreadId();
     }
 
-    void InsertHostThread(u32 value) {
-        const size_t index = num_host_threads++;
-        ASSERT_MSG(index < NUM_REGISTRABLE_HOST_THREADS, "Too many host threads");
-        register_host_thread_values[index] = value;
-        register_host_thread_keys[index] = std::this_thread::get_id();
-    }
-
-    [[nodiscard]] u32 GetCurrentHostThreadID() const {
-        const std::thread::id this_id = std::this_thread::get_id();
+    [[nodiscard]] u32 GetCurrentHostThreadID() {
+        const auto this_id = GetHostThreadId();
         if (!is_multicore && single_core_thread_id == this_id) {
             return static_cast<u32>(system.GetCpuManager().CurrentCore());
         }
-        const auto end =
-            register_host_thread_keys.begin() + static_cast<ptrdiff_t>(num_host_threads);
-        const auto it = std::find(register_host_thread_keys.begin(), end, this_id);
-        if (it == end) {
-            return Core::INVALID_HOST_THREAD_ID;
-        }
-        return register_host_thread_values[static_cast<size_t>(
-            std::distance(register_host_thread_keys.begin(), it))];
+        return this_id;
     }
 
-    Core::EmuThreadHandle GetCurrentEmuThreadID() const {
+    [[nodiscard]] Core::EmuThreadHandle GetCurrentEmuThreadID() {
         Core::EmuThreadHandle result = Core::EmuThreadHandle::InvalidHandle();
         result.host_handle = GetCurrentHostThreadID();
         if (result.host_handle >= Core::Hardware::NUM_CPU_CORES) {
             return result;
         }
-        const Kernel::Scheduler& sched = cores[result.host_handle].Scheduler();
+        const Kernel::KScheduler& sched = cores[result.host_handle].Scheduler();
         const Kernel::Thread* current = sched.GetCurrentThread();
         if (current != nullptr && !current->IsPhantomMode()) {
             result.guest_handle = current->GetGlobalHandle();
@@ -314,8 +304,7 @@ struct KernelCore::Impl {
     // Lists all processes that exist in the current session.
     std::vector<std::shared_ptr<Process>> process_list;
     Process* current_process = nullptr;
-    Kernel::GlobalScheduler global_scheduler;
-    Kernel::Synchronization synchronization;
+    std::unique_ptr<Kernel::GlobalSchedulerContext> global_scheduler_context;
     Kernel::TimeManager time_manager;
 
     std::shared_ptr<ResourceLimit> system_resource_limit;
@@ -333,15 +322,8 @@ struct KernelCore::Impl {
     std::unique_ptr<Core::ExclusiveMonitor> exclusive_monitor;
     std::vector<Kernel::PhysicalCore> cores;
 
-    // 0-3 IDs represent core threads, >3 represent others
-    std::atomic<u32> registered_thread_ids{Core::Hardware::NUM_CPU_CORES};
-
-    // Number of host threads is a relatively high number to avoid overflowing
-    static constexpr size_t NUM_REGISTRABLE_HOST_THREADS = 64;
-    std::atomic<size_t> num_host_threads{0};
-    std::array<std::atomic<std::thread::id>, NUM_REGISTRABLE_HOST_THREADS>
-        register_host_thread_keys{};
-    std::array<std::atomic<u32>, NUM_REGISTRABLE_HOST_THREADS> register_host_thread_values{};
+    // Next host thead ID to use, 0-3 IDs represent core threads, >3 represent others
+    std::atomic<u32> next_host_thread_id{Core::Hardware::NUM_CPU_CORES};
 
     // Kernel memory management
     std::unique_ptr<Memory::MemoryManager> memory_manager;
@@ -353,12 +335,19 @@ struct KernelCore::Impl {
     std::shared_ptr<Kernel::SharedMemory> irs_shared_mem;
     std::shared_ptr<Kernel::SharedMemory> time_shared_mem;
 
+    // Threads used for services
+    std::unordered_set<std::shared_ptr<Kernel::ServiceThread>> service_threads;
+
+    // Service threads are managed by a worker thread, so that a calling service thread can queue up
+    // the release of itself
+    std::unique_ptr<Common::ThreadWorker> service_thread_manager;
+
     std::array<std::shared_ptr<Thread>, Core::Hardware::NUM_CPU_CORES> suspend_threads{};
     std::array<Core::CPUInterruptHandler, Core::Hardware::NUM_CPU_CORES> interrupts{};
-    std::array<std::unique_ptr<Kernel::Scheduler>, Core::Hardware::NUM_CPU_CORES> schedulers{};
+    std::array<std::unique_ptr<Kernel::KScheduler>, Core::Hardware::NUM_CPU_CORES> schedulers{};
 
     bool is_multicore{};
-    std::thread::id single_core_thread_id{};
+    u32 single_core_thread_id{};
 
     std::array<u64, Core::Hardware::NUM_CPU_CORES> svc_ticks{};
 
@@ -415,19 +404,19 @@ const std::vector<std::shared_ptr<Process>>& KernelCore::GetProcessList() const
     return impl->process_list;
 }
 
-Kernel::GlobalScheduler& KernelCore::GlobalScheduler() {
-    return impl->global_scheduler;
+Kernel::GlobalSchedulerContext& KernelCore::GlobalSchedulerContext() {
+    return *impl->global_scheduler_context;
 }
 
-const Kernel::GlobalScheduler& KernelCore::GlobalScheduler() const {
-    return impl->global_scheduler;
+const Kernel::GlobalSchedulerContext& KernelCore::GlobalSchedulerContext() const {
+    return *impl->global_scheduler_context;
 }
 
-Kernel::Scheduler& KernelCore::Scheduler(std::size_t id) {
+Kernel::KScheduler& KernelCore::Scheduler(std::size_t id) {
     return *impl->schedulers[id];
 }
 
-const Kernel::Scheduler& KernelCore::Scheduler(std::size_t id) const {
+const Kernel::KScheduler& KernelCore::Scheduler(std::size_t id) const {
     return *impl->schedulers[id];
 }
 
@@ -451,16 +440,13 @@ const Kernel::PhysicalCore& KernelCore::CurrentPhysicalCore() const {
     return impl->cores[core_id];
 }
 
-Kernel::Scheduler& KernelCore::CurrentScheduler() {
+Kernel::KScheduler* KernelCore::CurrentScheduler() {
     u32 core_id = impl->GetCurrentHostThreadID();
-    ASSERT(core_id < Core::Hardware::NUM_CPU_CORES);
-    return *impl->schedulers[core_id];
-}
-
-const Kernel::Scheduler& KernelCore::CurrentScheduler() const {
-    u32 core_id = impl->GetCurrentHostThreadID();
-    ASSERT(core_id < Core::Hardware::NUM_CPU_CORES);
-    return *impl->schedulers[core_id];
+    if (core_id >= Core::Hardware::NUM_CPU_CORES) {
+        // This is expected when called from not a guest thread
+        return {};
+    }
+    return impl->schedulers[core_id].get();
 }
 
 std::array<Core::CPUInterruptHandler, Core::Hardware::NUM_CPU_CORES>& KernelCore::Interrupts() {
@@ -472,14 +458,6 @@ const std::array<Core::CPUInterruptHandler, Core::Hardware::NUM_CPU_CORES>& Kern
     return impl->interrupts;
 }
 
-Kernel::Synchronization& KernelCore::Synchronization() {
-    return impl->synchronization;
-}
-
-const Kernel::Synchronization& KernelCore::Synchronization() const {
-    return impl->synchronization;
-}
-
 Kernel::TimeManager& KernelCore::TimeManager() {
     return impl->time_manager;
 }
@@ -623,10 +601,12 @@ const Kernel::SharedMemory& KernelCore::GetTimeSharedMem() const {
 void KernelCore::Suspend(bool in_suspention) {
     const bool should_suspend = exception_exited || in_suspention;
     {
-        SchedulerLock lock(*this);
-        ThreadStatus status = should_suspend ? ThreadStatus::Ready : ThreadStatus::WaitSleep;
+        KScopedSchedulerLock lock(*this);
+        const auto state = should_suspend ? ThreadState::Runnable : ThreadState::Waiting;
         for (std::size_t i = 0; i < Core::Hardware::NUM_CPU_CORES; i++) {
-            impl->suspend_threads[i]->SetStatus(status);
+            impl->suspend_threads[i]->SetState(state);
+            impl->suspend_threads[i]->SetWaitReasonForDebugging(
+                ThreadWaitReasonForDebugging::Suspended);
         }
     }
 }
@@ -650,4 +630,19 @@ void KernelCore::ExitSVCProfile() {
     MicroProfileLeave(MICROPROFILE_TOKEN(Kernel_SVC), impl->svc_ticks[core]);
 }
 
+std::weak_ptr<Kernel::ServiceThread> KernelCore::CreateServiceThread(const std::string& name) {
+    auto service_thread = std::make_shared<Kernel::ServiceThread>(*this, 1, name);
+    impl->service_thread_manager->QueueWork(
+        [this, service_thread] { impl->service_threads.emplace(service_thread); });
+    return service_thread;
+}
+
+void KernelCore::ReleaseServiceThread(std::weak_ptr<Kernel::ServiceThread> service_thread) {
+    impl->service_thread_manager->QueueWork([this, service_thread] {
+        if (auto strong_ptr = service_thread.lock()) {
+            impl->service_threads.erase(strong_ptr);
+        }
+    });
+}
+
 } // namespace Kernel

src/core/hle/kernel/kernel.h

@@ -33,15 +33,15 @@ template <typename T>
 class SlabHeap;
 } // namespace Memory
 
-class AddressArbiter;
 class ClientPort;
-class GlobalScheduler;
+class GlobalSchedulerContext;
 class HandleTable;
 class PhysicalCore;
 class Process;
 class ResourceLimit;
-class Scheduler;
+class KScheduler;
 class SharedMemory;
+class ServiceThread;
 class Synchronization;
 class Thread;
 class TimeManager;
@@ -102,16 +102,16 @@ public:
     const std::vector<std::shared_ptr<Process>>& GetProcessList() const;
 
     /// Gets the sole instance of the global scheduler
-    Kernel::GlobalScheduler& GlobalScheduler();
+    Kernel::GlobalSchedulerContext& GlobalSchedulerContext();
 
     /// Gets the sole instance of the global scheduler
-    const Kernel::GlobalScheduler& GlobalScheduler() const;
+    const Kernel::GlobalSchedulerContext& GlobalSchedulerContext() const;
 
     /// Gets the sole instance of the Scheduler assoviated with cpu core 'id'
-    Kernel::Scheduler& Scheduler(std::size_t id);
+    Kernel::KScheduler& Scheduler(std::size_t id);
 
     /// Gets the sole instance of the Scheduler assoviated with cpu core 'id'
-    const Kernel::Scheduler& Scheduler(std::size_t id) const;
+    const Kernel::KScheduler& Scheduler(std::size_t id) const;
 
     /// Gets the an instance of the respective physical CPU core.
     Kernel::PhysicalCore& PhysicalCore(std::size_t id);
@@ -120,10 +120,7 @@ public:
     const Kernel::PhysicalCore& PhysicalCore(std::size_t id) const;
 
     /// Gets the sole instance of the Scheduler at the current running core.
-    Kernel::Scheduler& CurrentScheduler();
-
-    /// Gets the sole instance of the Scheduler at the current running core.
-    const Kernel::Scheduler& CurrentScheduler() const;
+    Kernel::KScheduler* CurrentScheduler();
 
     /// Gets the an instance of the current physical CPU core.
     Kernel::PhysicalCore& CurrentPhysicalCore();
@@ -131,12 +128,6 @@ public:
     /// Gets the an instance of the current physical CPU core.
     const Kernel::PhysicalCore& CurrentPhysicalCore() const;
 
-    /// Gets the an instance of the Synchronization Interface.
-    Kernel::Synchronization& Synchronization();
-
-    /// Gets the an instance of the Synchronization Interface.
-    const Kernel::Synchronization& Synchronization() const;
-
     /// Gets the an instance of the TimeManager Interface.
     Kernel::TimeManager& TimeManager();
 
@@ -230,6 +221,22 @@ public:
 
     void ExitSVCProfile();
 
+    /**
+     * Creates an HLE service thread, which are used to execute service routines asynchronously.
+     * While these are allocated per ServerSession, these need to be owned and managed outside of
+     * ServerSession to avoid a circular dependency.
+     * @param name String name for the ServerSession creating this thread, used for debug purposes.
+     * @returns The a weak pointer newly created service thread.
+     */
+    std::weak_ptr<Kernel::ServiceThread> CreateServiceThread(const std::string& name);
+
+    /**
+     * Releases a HLE service thread, instructing KernelCore to free it. This should be called when
+     * the ServerSession associated with the thread is destroyed.
+     * @param service_thread Service thread to release.
+     */
+    void ReleaseServiceThread(std::weak_ptr<Kernel::ServiceThread> service_thread);
+
 private:
     friend class Object;
     friend class Process;

src/core/hle/kernel/memory/address_space_info.cpp

@@ -96,6 +96,7 @@ u64 AddressSpaceInfo::GetAddressSpaceStart(std::size_t width, Type type) {
         return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].address;
     }
     UNREACHABLE();
+    return 0;
 }
 
 std::size_t AddressSpaceInfo::GetAddressSpaceSize(std::size_t width, Type type) {
@@ -112,6 +113,7 @@ std::size_t AddressSpaceInfo::GetAddressSpaceSize(std::size_t width, Type type)
         return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].size;
     }
     UNREACHABLE();
+    return 0;
 }
 
 } // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_block.h

@@ -73,12 +73,12 @@ enum class MemoryState : u32 {
     ThreadLocal =
         static_cast<u32>(Svc::MemoryState::ThreadLocal) | FlagMapped | FlagReferenceCounted,
 
-    Transfered = static_cast<u32>(Svc::MemoryState::Transfered) | FlagsMisc |
-                 FlagCanAlignedDeviceMap | FlagCanChangeAttribute | FlagCanUseIpc |
-                 FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+    Transferred = static_cast<u32>(Svc::MemoryState::Transferred) | FlagsMisc |
+                  FlagCanAlignedDeviceMap | FlagCanChangeAttribute | FlagCanUseIpc |
+                  FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
 
-    SharedTransfered = static_cast<u32>(Svc::MemoryState::SharedTransfered) | FlagsMisc |
-                       FlagCanAlignedDeviceMap | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+    SharedTransferred = static_cast<u32>(Svc::MemoryState::SharedTransferred) | FlagsMisc |
+                        FlagCanAlignedDeviceMap | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
 
     SharedCode = static_cast<u32>(Svc::MemoryState::SharedCode) | FlagMapped |
                  FlagReferenceCounted | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
@@ -111,8 +111,8 @@ static_assert(static_cast<u32>(MemoryState::AliasCodeData) == 0x03FFBD09);
 static_assert(static_cast<u32>(MemoryState::Ipc) == 0x005C3C0A);
 static_assert(static_cast<u32>(MemoryState::Stack) == 0x005C3C0B);
 static_assert(static_cast<u32>(MemoryState::ThreadLocal) == 0x0040200C);
-static_assert(static_cast<u32>(MemoryState::Transfered) == 0x015C3C0D);
-static_assert(static_cast<u32>(MemoryState::SharedTransfered) == 0x005C380E);
+static_assert(static_cast<u32>(MemoryState::Transferred) == 0x015C3C0D);
+static_assert(static_cast<u32>(MemoryState::SharedTransferred) == 0x005C380E);
 static_assert(static_cast<u32>(MemoryState::SharedCode) == 0x0040380F);
 static_assert(static_cast<u32>(MemoryState::Inaccessible) == 0x00000010);
 static_assert(static_cast<u32>(MemoryState::NonSecureIpc) == 0x005C3811);

src/core/hle/kernel/memory/memory_layout.h

@@ -5,9 +5,28 @@
 #pragma once
 
 #include "common/common_types.h"
+#include "core/device_memory.h"
 
 namespace Kernel::Memory {
 
+constexpr std::size_t KernelAslrAlignment = 2 * 1024 * 1024;
+constexpr std::size_t KernelVirtualAddressSpaceWidth = 1ULL << 39;
+constexpr std::size_t KernelPhysicalAddressSpaceWidth = 1ULL << 48;
+constexpr std::size_t KernelVirtualAddressSpaceBase = 0ULL - KernelVirtualAddressSpaceWidth;
+constexpr std::size_t KernelVirtualAddressSpaceEnd =
+    KernelVirtualAddressSpaceBase + (KernelVirtualAddressSpaceWidth - KernelAslrAlignment);
+constexpr std::size_t KernelVirtualAddressSpaceLast = KernelVirtualAddressSpaceEnd - 1;
+constexpr std::size_t KernelVirtualAddressSpaceSize =
+    KernelVirtualAddressSpaceEnd - KernelVirtualAddressSpaceBase;
+
+constexpr bool IsKernelAddressKey(VAddr key) {
+    return KernelVirtualAddressSpaceBase <= key && key <= KernelVirtualAddressSpaceLast;
+}
+
+constexpr bool IsKernelAddress(VAddr address) {
+    return KernelVirtualAddressSpaceBase <= address && address < KernelVirtualAddressSpaceEnd;
+}
+
 class MemoryRegion final {
     friend class MemoryLayout;
 

src/core/hle/kernel/memory/page_table.cpp

@@ -265,7 +265,7 @@ ResultCode PageTable::InitializeForProcess(FileSys::ProgramAddressSpaceType as_t
     physical_memory_usage = 0;
     memory_pool = pool;
 
-    page_table_impl.Resize(address_space_width, PageBits, true);
+    page_table_impl.Resize(address_space_width, PageBits);
 
     return InitializeMemoryLayout(start, end);
 }
@@ -1007,8 +1007,8 @@ constexpr VAddr PageTable::GetRegionAddress(MemoryState state) const {
     case MemoryState::Shared:
     case MemoryState::AliasCode:
     case MemoryState::AliasCodeData:
-    case MemoryState::Transfered:
-    case MemoryState::SharedTransfered:
+    case MemoryState::Transferred:
+    case MemoryState::SharedTransferred:
     case MemoryState::SharedCode:
     case MemoryState::GeneratedCode:
     case MemoryState::CodeOut:
@@ -1042,8 +1042,8 @@ constexpr std::size_t PageTable::GetRegionSize(MemoryState state) const {
     case MemoryState::Shared:
     case MemoryState::AliasCode:
     case MemoryState::AliasCodeData:
-    case MemoryState::Transfered:
-    case MemoryState::SharedTransfered:
+    case MemoryState::Transferred:
+    case MemoryState::SharedTransferred:
     case MemoryState::SharedCode:
     case MemoryState::GeneratedCode:
     case MemoryState::CodeOut:
@@ -1080,8 +1080,8 @@ constexpr bool PageTable::CanContain(VAddr addr, std::size_t size, MemoryState s
     case MemoryState::AliasCodeData:
     case MemoryState::Stack:
     case MemoryState::ThreadLocal:
-    case MemoryState::Transfered:
-    case MemoryState::SharedTransfered:
+    case MemoryState::Transferred:
+    case MemoryState::SharedTransferred:
     case MemoryState::SharedCode:
     case MemoryState::GeneratedCode:
     case MemoryState::CodeOut:

src/core/hle/kernel/mutex.cpp

@@ -1,170 +0,0 @@
-// Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <memory>
-#include <utility>
-#include <vector>
-
-#include "common/assert.h"
-#include "common/logging/log.h"
-#include "core/core.h"
-#include "core/hle/kernel/errors.h"
-#include "core/hle/kernel/handle_table.h"
-#include "core/hle/kernel/kernel.h"
-#include "core/hle/kernel/mutex.h"
-#include "core/hle/kernel/object.h"
-#include "core/hle/kernel/process.h"
-#include "core/hle/kernel/scheduler.h"
-#include "core/hle/kernel/thread.h"
-#include "core/hle/result.h"
-#include "core/memory.h"
-
-namespace Kernel {
-
-/// Returns the number of threads that are waiting for a mutex, and the highest priority one among
-/// those.
-static std::pair<std::shared_ptr<Thread>, u32> GetHighestPriorityMutexWaitingThread(
-    const std::shared_ptr<Thread>& current_thread, VAddr mutex_addr) {
-
-    std::shared_ptr<Thread> highest_priority_thread;
-    u32 num_waiters = 0;
-
-    for (const auto& thread : current_thread->GetMutexWaitingThreads()) {
-        if (thread->GetMutexWaitAddress() != mutex_addr)
-            continue;
-
-        ++num_waiters;
-        if (highest_priority_thread == nullptr ||
-            thread->GetPriority() < highest_priority_thread->GetPriority()) {
-            highest_priority_thread = thread;
-        }
-    }
-
-    return {highest_priority_thread, num_waiters};
-}
-
-/// Update the mutex owner field of all threads waiting on the mutex to point to the new owner.
-static void TransferMutexOwnership(VAddr mutex_addr, std::shared_ptr<Thread> current_thread,
-                                   std::shared_ptr<Thread> new_owner) {
-    current_thread->RemoveMutexWaiter(new_owner);
-    const auto threads = current_thread->GetMutexWaitingThreads();
-    for (const auto& thread : threads) {
-        if (thread->GetMutexWaitAddress() != mutex_addr)
-            continue;
-
-        ASSERT(thread->GetLockOwner() == current_thread.get());
-        current_thread->RemoveMutexWaiter(thread);
-        if (new_owner != thread)
-            new_owner->AddMutexWaiter(thread);
-    }
-}
-
-Mutex::Mutex(Core::System& system) : system{system} {}
-Mutex::~Mutex() = default;
-
-ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
-                             Handle requesting_thread_handle) {
-    // The mutex address must be 4-byte aligned
-    if ((address % sizeof(u32)) != 0) {
-        LOG_ERROR(Kernel, "Address is not 4-byte aligned! address={:016X}", address);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    auto& kernel = system.Kernel();
-    std::shared_ptr<Thread> current_thread =
-        SharedFrom(kernel.CurrentScheduler().GetCurrentThread());
-    {
-        SchedulerLock lock(kernel);
-        // The mutex address must be 4-byte aligned
-        if ((address % sizeof(u32)) != 0) {
-            return ERR_INVALID_ADDRESS;
-        }
-
-        const auto& handle_table = kernel.CurrentProcess()->GetHandleTable();
-        std::shared_ptr<Thread> holding_thread = handle_table.Get<Thread>(holding_thread_handle);
-        std::shared_ptr<Thread> requesting_thread =
-            handle_table.Get<Thread>(requesting_thread_handle);
-
-        // TODO(Subv): It is currently unknown if it is possible to lock a mutex in behalf of
-        // another thread.
-        ASSERT(requesting_thread == current_thread);
-
-        current_thread->SetSynchronizationResults(nullptr, RESULT_SUCCESS);
-
-        const u32 addr_value = system.Memory().Read32(address);
-
-        // If the mutex isn't being held, just return success.
-        if (addr_value != (holding_thread_handle | Mutex::MutexHasWaitersFlag)) {
-            return RESULT_SUCCESS;
-        }
-
-        if (holding_thread == nullptr) {
-            return ERR_INVALID_HANDLE;
-        }
-
-        // Wait until the mutex is released
-        current_thread->SetMutexWaitAddress(address);
-        current_thread->SetWaitHandle(requesting_thread_handle);
-
-        current_thread->SetStatus(ThreadStatus::WaitMutex);
-
-        // Update the lock holder thread's priority to prevent priority inversion.
-        holding_thread->AddMutexWaiter(current_thread);
-    }
-
-    {
-        SchedulerLock lock(kernel);
-        auto* owner = current_thread->GetLockOwner();
-        if (owner != nullptr) {
-            owner->RemoveMutexWaiter(current_thread);
-        }
-    }
-    return current_thread->GetSignalingResult();
-}
-
-std::pair<ResultCode, std::shared_ptr<Thread>> Mutex::Unlock(std::shared_ptr<Thread> owner,
-                                                             VAddr address) {
-    // The mutex address must be 4-byte aligned
-    if ((address % sizeof(u32)) != 0) {
-        LOG_ERROR(Kernel, "Address is not 4-byte aligned! address={:016X}", address);
-        return {ERR_INVALID_ADDRESS, nullptr};
-    }
-
-    auto [new_owner, num_waiters] = GetHighestPriorityMutexWaitingThread(owner, address);
-    if (new_owner == nullptr) {
-        system.Memory().Write32(address, 0);
-        return {RESULT_SUCCESS, nullptr};
-    }
-    // Transfer the ownership of the mutex from the previous owner to the new one.
-    TransferMutexOwnership(address, owner, new_owner);
-    u32 mutex_value = new_owner->GetWaitHandle();
-    if (num_waiters >= 2) {
-        // Notify the guest that there are still some threads waiting for the mutex
-        mutex_value |= Mutex::MutexHasWaitersFlag;
-    }
-    new_owner->SetSynchronizationResults(nullptr, RESULT_SUCCESS);
-    new_owner->SetLockOwner(nullptr);
-    new_owner->ResumeFromWait();
-
-    system.Memory().Write32(address, mutex_value);
-    return {RESULT_SUCCESS, new_owner};
-}
-
-ResultCode Mutex::Release(VAddr address) {
-    auto& kernel = system.Kernel();
-    SchedulerLock lock(kernel);
-
-    std::shared_ptr<Thread> current_thread =
-        SharedFrom(kernel.CurrentScheduler().GetCurrentThread());
-
-    auto [result, new_owner] = Unlock(current_thread, address);
-
-    if (result != RESULT_SUCCESS && new_owner != nullptr) {
-        new_owner->SetSynchronizationResults(nullptr, result);
-    }
-
-    return result;
-}
-
-} // namespace Kernel

src/core/hle/kernel/mutex.h

@@ -1,42 +0,0 @@
-// Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include "common/common_types.h"
-
-union ResultCode;
-
-namespace Core {
-class System;
-}
-
-namespace Kernel {
-
-class Mutex final {
-public:
-    explicit Mutex(Core::System& system);
-    ~Mutex();
-
-    /// Flag that indicates that a mutex still has threads waiting for it.
-    static constexpr u32 MutexHasWaitersFlag = 0x40000000;
-    /// Mask of the bits in a mutex address value that contain the mutex owner.
-    static constexpr u32 MutexOwnerMask = 0xBFFFFFFF;
-
-    /// Attempts to acquire a mutex at the specified address.
-    ResultCode TryAcquire(VAddr address, Handle holding_thread_handle,
-                          Handle requesting_thread_handle);
-
-    /// Unlocks a mutex for owner at address
-    std::pair<ResultCode, std::shared_ptr<Thread>> Unlock(std::shared_ptr<Thread> owner,
-                                                          VAddr address);
-
-    /// Releases the mutex at the specified address.
-    ResultCode Release(VAddr address);
-
-private:
-    Core::System& system;
-};
-
-} // namespace Kernel

src/core/hle/kernel/object.h

@@ -50,6 +50,11 @@ public:
     }
     virtual HandleType GetHandleType() const = 0;
 
+    void Close() {
+        // TODO(bunnei): This is a placeholder to decrement the reference count, which we will use
+        // when we implement KAutoObject instead of using shared_ptr.
+    }
+
     /**
      * Check if a thread can wait on the object
      * @return True if a thread can wait on the object, otherwise false

src/core/hle/kernel/physical_core.cpp

@@ -7,14 +7,14 @@
 #include "core/arm/dynarmic/arm_dynarmic_32.h"
 #include "core/arm/dynarmic/arm_dynarmic_64.h"
 #include "core/core.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/physical_core.h"
-#include "core/hle/kernel/scheduler.h"
 
 namespace Kernel {
 
 PhysicalCore::PhysicalCore(std::size_t core_index, Core::System& system,
-                           Kernel::Scheduler& scheduler, Core::CPUInterrupts& interrupts)
+                           Kernel::KScheduler& scheduler, Core::CPUInterrupts& interrupts)
     : core_index{core_index}, system{system}, scheduler{scheduler},
       interrupts{interrupts}, guard{std::make_unique<Common::SpinLock>()} {}
 
@@ -43,10 +43,6 @@ void PhysicalCore::Idle() {
     interrupts[core_index].AwaitInterrupt();
 }
 
-void PhysicalCore::Shutdown() {
-    scheduler.Shutdown();
-}
-
 bool PhysicalCore::IsInterrupted() const {
     return interrupts[core_index].IsInterrupted();
 }

src/core/hle/kernel/physical_core.h

@@ -15,7 +15,7 @@ class SpinLock;
 }
 
 namespace Kernel {
-class Scheduler;
+class KScheduler;
 } // namespace Kernel
 
 namespace Core {
@@ -28,7 +28,7 @@ namespace Kernel {
 
 class PhysicalCore {
 public:
-    PhysicalCore(std::size_t core_index, Core::System& system, Kernel::Scheduler& scheduler,
+    PhysicalCore(std::size_t core_index, Core::System& system, Kernel::KScheduler& scheduler,
                  Core::CPUInterrupts& interrupts);
     ~PhysicalCore();
 
@@ -55,9 +55,6 @@ public:
     /// Check if this core is interrupted
     bool IsInterrupted() const;
 
-    // Shutdown this physical core.
-    void Shutdown();
-
     bool IsInitialized() const {
         return arm_interface != nullptr;
     }
@@ -82,18 +79,18 @@ public:
         return core_index;
     }
 
-    Kernel::Scheduler& Scheduler() {
+    Kernel::KScheduler& Scheduler() {
         return scheduler;
     }
 
-    const Kernel::Scheduler& Scheduler() const {
+    const Kernel::KScheduler& Scheduler() const {
         return scheduler;
     }
 
 private:
     const std::size_t core_index;
     Core::System& system;
-    Kernel::Scheduler& scheduler;
+    Kernel::KScheduler& scheduler;
     Core::CPUInterrupts& interrupts;
     std::unique_ptr<Common::SpinLock> guard;
     std::unique_ptr<Core::ARM_Interface> arm_interface;

src/core/hle/kernel/process.cpp

@@ -15,13 +15,13 @@
 #include "core/file_sys/program_metadata.h"
 #include "core/hle/kernel/code_set.h"
 #include "core/hle/kernel/errors.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/memory/memory_block_manager.h"
 #include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/memory/slab_heap.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/resource_limit.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/lock.h"
 #include "core/memory.h"
@@ -54,8 +54,8 @@ void SetupMainThread(Core::System& system, Process& owner_process, u32 priority,
     auto& kernel = system.Kernel();
     // Threads by default are dormant, wake up the main thread so it runs when the scheduler fires
     {
-        SchedulerLock lock{kernel};
-        thread->SetStatus(ThreadStatus::Ready);
+        KScopedSchedulerLock lock{kernel};
+        thread->SetState(ThreadState::Runnable);
     }
 }
 } // Anonymous namespace
@@ -162,48 +162,6 @@ u64 Process::GetTotalPhysicalMemoryUsedWithoutSystemResource() const {
     return GetTotalPhysicalMemoryUsed() - GetSystemResourceUsage();
 }
 
-void Process::InsertConditionVariableThread(std::shared_ptr<Thread> thread) {
-    VAddr cond_var_addr = thread->GetCondVarWaitAddress();
-    std::list<std::shared_ptr<Thread>>& thread_list = cond_var_threads[cond_var_addr];
-    auto it = thread_list.begin();
-    while (it != thread_list.end()) {
-        const std::shared_ptr<Thread> current_thread = *it;
-        if (current_thread->GetPriority() > thread->GetPriority()) {
-            thread_list.insert(it, thread);
-            return;
-        }
-        ++it;
-    }
-    thread_list.push_back(thread);
-}
-
-void Process::RemoveConditionVariableThread(std::shared_ptr<Thread> thread) {
-    VAddr cond_var_addr = thread->GetCondVarWaitAddress();
-    std::list<std::shared_ptr<Thread>>& thread_list = cond_var_threads[cond_var_addr];
-    auto it = thread_list.begin();
-    while (it != thread_list.end()) {
-        const std::shared_ptr<Thread> current_thread = *it;
-        if (current_thread.get() == thread.get()) {
-            thread_list.erase(it);
-            return;
-        }
-        ++it;
-    }
-}
-
-std::vector<std::shared_ptr<Thread>> Process::GetConditionVariableThreads(
-    const VAddr cond_var_addr) {
-    std::vector<std::shared_ptr<Thread>> result{};
-    std::list<std::shared_ptr<Thread>>& thread_list = cond_var_threads[cond_var_addr];
-    auto it = thread_list.begin();
-    while (it != thread_list.end()) {
-        std::shared_ptr<Thread> current_thread = *it;
-        result.push_back(current_thread);
-        ++it;
-    }
-    return result;
-}
-
 void Process::RegisterThread(const Thread* thread) {
     thread_list.push_back(thread);
 }
@@ -213,7 +171,7 @@ void Process::UnregisterThread(const Thread* thread) {
 }
 
 ResultCode Process::ClearSignalState() {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     if (status == ProcessStatus::Exited) {
         LOG_ERROR(Kernel, "called on a terminated process instance.");
         return ERR_INVALID_STATE;
@@ -314,18 +272,18 @@ void Process::PrepareForTermination() {
             if (thread->GetOwnerProcess() != this)
                 continue;
 
-            if (thread.get() == system.CurrentScheduler().GetCurrentThread())
+            if (thread.get() == kernel.CurrentScheduler()->GetCurrentThread())
                 continue;
 
             // TODO(Subv): When are the other running/ready threads terminated?
-            ASSERT_MSG(thread->GetStatus() == ThreadStatus::WaitSynch,
+            ASSERT_MSG(thread->GetState() == ThreadState::Waiting,
                        "Exiting processes with non-waiting threads is currently unimplemented");
 
             thread->Stop();
         }
     };
 
-    stop_threads(system.GlobalScheduler().GetThreadList());
+    stop_threads(system.GlobalSchedulerContext().GetThreadList());
 
     FreeTLSRegion(tls_region_address);
     tls_region_address = 0;
@@ -347,7 +305,7 @@ static auto FindTLSPageWithAvailableSlots(std::vector<TLSPage>& tls_pages) {
 }
 
 VAddr Process::CreateTLSRegion() {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     if (auto tls_page_iter{FindTLSPageWithAvailableSlots(tls_pages)};
         tls_page_iter != tls_pages.cend()) {
         return *tls_page_iter->ReserveSlot();
@@ -378,7 +336,7 @@ VAddr Process::CreateTLSRegion() {
 }
 
 void Process::FreeTLSRegion(VAddr tls_address) {
-    SchedulerLock lock(system.Kernel());
+    KScopedSchedulerLock lock(system.Kernel());
     const VAddr aligned_address = Common::AlignDown(tls_address, Core::Memory::PAGE_SIZE);
     auto iter =
         std::find_if(tls_pages.begin(), tls_pages.end(), [aligned_address](const auto& page) {
@@ -406,21 +364,18 @@ void Process::LoadModule(CodeSet code_set, VAddr base_addr) {
     ReprotectSegment(code_set.DataSegment(), Memory::MemoryPermission::ReadAndWrite);
 }
 
+bool Process::IsSignaled() const {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+    return is_signaled;
+}
+
 Process::Process(Core::System& system)
-    : SynchronizationObject{system.Kernel()}, page_table{std::make_unique<Memory::PageTable>(
-                                                  system)},
-      handle_table{system.Kernel()}, address_arbiter{system}, mutex{system}, system{system} {}
+    : KSynchronizationObject{system.Kernel()},
+      page_table{std::make_unique<Memory::PageTable>(system)}, handle_table{system.Kernel()},
+      address_arbiter{system}, condition_var{system}, system{system} {}
 
 Process::~Process() = default;
 
-void Process::Acquire(Thread* thread) {
-    ASSERT_MSG(!ShouldWait(thread), "Object unavailable!");
-}
-
-bool Process::ShouldWait(const Thread* thread) const {
-    return !is_signaled;
-}
-
 void Process::ChangeStatus(ProcessStatus new_status) {
     if (status == new_status) {
         return;
@@ -428,7 +383,7 @@ void Process::ChangeStatus(ProcessStatus new_status) {
 
     status = new_status;
     is_signaled = true;
-    Signal();
+    NotifyAvailable();
 }
 
 ResultCode Process::AllocateMainThreadStack(std::size_t stack_size) {

src/core/hle/kernel/process.h

@@ -11,11 +11,11 @@
 #include <unordered_map>
 #include <vector>
 #include "common/common_types.h"
-#include "core/hle/kernel/address_arbiter.h"
 #include "core/hle/kernel/handle_table.h"
-#include "core/hle/kernel/mutex.h"
+#include "core/hle/kernel/k_address_arbiter.h"
+#include "core/hle/kernel/k_condition_variable.h"
+#include "core/hle/kernel/k_synchronization_object.h"
 #include "core/hle/kernel/process_capability.h"
-#include "core/hle/kernel/synchronization_object.h"
 #include "core/hle/result.h"
 
 namespace Core {
@@ -63,7 +63,7 @@ enum class ProcessStatus {
     DebugBreak,
 };
 
-class Process final : public SynchronizationObject {
+class Process final : public KSynchronizationObject {
 public:
     explicit Process(Core::System& system);
     ~Process() override;
@@ -123,24 +123,30 @@ public:
         return handle_table;
     }
 
-    /// Gets a reference to the process' address arbiter.
-    AddressArbiter& GetAddressArbiter() {
-        return address_arbiter;
+    ResultCode SignalToAddress(VAddr address) {
+        return condition_var.SignalToAddress(address);
     }
 
-    /// Gets a const reference to the process' address arbiter.
-    const AddressArbiter& GetAddressArbiter() const {
-        return address_arbiter;
+    ResultCode WaitForAddress(Handle handle, VAddr address, u32 tag) {
+        return condition_var.WaitForAddress(handle, address, tag);
     }
 
-    /// Gets a reference to the process' mutex lock.
-    Mutex& GetMutex() {
-        return mutex;
+    void SignalConditionVariable(u64 cv_key, int32_t count) {
+        return condition_var.Signal(cv_key, count);
     }
 
-    /// Gets a const reference to the process' mutex lock
-    const Mutex& GetMutex() const {
-        return mutex;
+    ResultCode WaitConditionVariable(VAddr address, u64 cv_key, u32 tag, s64 ns) {
+        return condition_var.Wait(address, cv_key, tag, ns);
+    }
+
+    ResultCode SignalAddressArbiter(VAddr address, Svc::SignalType signal_type, s32 value,
+                                    s32 count) {
+        return address_arbiter.SignalToAddress(address, signal_type, value, count);
+    }
+
+    ResultCode WaitAddressArbiter(VAddr address, Svc::ArbitrationType arb_type, s32 value,
+                                  s64 timeout) {
+        return address_arbiter.WaitForAddress(address, arb_type, value, timeout);
     }
 
     /// Gets the address to the process' dedicated TLS region.
@@ -216,6 +222,16 @@ public:
         total_process_running_time_ticks += ticks;
     }
 
+    /// Gets the process schedule count, used for thread yelding
+    s64 GetScheduledCount() const {
+        return schedule_count;
+    }
+
+    /// Increments the process schedule count, used for thread yielding.
+    void IncrementScheduledCount() {
+        ++schedule_count;
+    }
+
     /// Gets 8 bytes of random data for svcGetInfo RandomEntropy
     u64 GetRandomEntropy(std::size_t index) const {
         return random_entropy.at(index);
@@ -240,15 +256,6 @@ public:
         return thread_list;
     }
 
-    /// Insert a thread into the condition variable wait container
-    void InsertConditionVariableThread(std::shared_ptr<Thread> thread);
-
-    /// Remove a thread from the condition variable wait container
-    void RemoveConditionVariableThread(std::shared_ptr<Thread> thread);
-
-    /// Obtain all condition variable threads waiting for some address
-    std::vector<std::shared_ptr<Thread>> GetConditionVariableThreads(VAddr cond_var_addr);
-
     /// Registers a thread as being created under this process,
     /// adding it to this process' thread list.
     void RegisterThread(const Thread* thread);
@@ -294,6 +301,8 @@ public:
 
     void LoadModule(CodeSet code_set, VAddr base_addr);
 
+    bool IsSignaled() const override;
+
     ///////////////////////////////////////////////////////////////////////////////////////////////
     // Thread-local storage management
 
@@ -304,12 +313,6 @@ public:
     void FreeTLSRegion(VAddr tls_address);
 
 private:
-    /// Checks if the specified thread should wait until this process is available.
-    bool ShouldWait(const Thread* thread) const override;
-
-    /// Acquires/locks this process for the specified thread if it's available.
-    void Acquire(Thread* thread) override;
-
     /// Changes the process status. If the status is different
     /// from the current process status, then this will trigger
     /// a process signal.
@@ -363,12 +366,12 @@ private:
     HandleTable handle_table;
 
     /// Per-process address arbiter.
-    AddressArbiter address_arbiter;
+    KAddressArbiter address_arbiter;
 
     /// The per-process mutex lock instance used for handling various
     /// forms of services, such as lock arbitration, and condition
     /// variable related facilities.
-    Mutex mutex;
+    KConditionVariable condition_var;
 
     /// Address indicating the location of the process' dedicated TLS region.
     VAddr tls_region_address = 0;
@@ -379,9 +382,6 @@ private:
     /// List of threads that are running with this process as their owner.
     std::list<const Thread*> thread_list;
 
-    /// List of threads waiting for a condition variable
-    std::unordered_map<VAddr, std::list<std::shared_ptr<Thread>>> cond_var_threads;
-
     /// Address of the top of the main thread's stack
     VAddr main_thread_stack_top{};
 
@@ -397,6 +397,11 @@ private:
     /// Name of this process
     std::string name;
 
+    /// Schedule count of this process
+    s64 schedule_count{};
+
+    bool is_signaled{};
+
     /// System context
     Core::System& system;
 };

src/core/hle/kernel/readable_event.cpp

@@ -6,32 +6,30 @@
 #include "common/assert.h"
 #include "common/logging/log.h"
 #include "core/hle/kernel/errors.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/readable_event.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/thread.h"
 
 namespace Kernel {
 
-ReadableEvent::ReadableEvent(KernelCore& kernel) : SynchronizationObject{kernel} {}
+ReadableEvent::ReadableEvent(KernelCore& kernel) : KSynchronizationObject{kernel} {}
 ReadableEvent::~ReadableEvent() = default;
 
-bool ReadableEvent::ShouldWait(const Thread* thread) const {
-    return !is_signaled;
-}
-
-void ReadableEvent::Acquire(Thread* thread) {
-    ASSERT_MSG(IsSignaled(), "object unavailable!");
-}
-
 void ReadableEvent::Signal() {
     if (is_signaled) {
         return;
     }
 
     is_signaled = true;
-    SynchronizationObject::Signal();
+    NotifyAvailable();
+}
+
+bool ReadableEvent::IsSignaled() const {
+    ASSERT(kernel.GlobalSchedulerContext().IsLocked());
+
+    return is_signaled;
 }
 
 void ReadableEvent::Clear() {
@@ -39,7 +37,7 @@ void ReadableEvent::Clear() {
 }
 
 ResultCode ReadableEvent::Reset() {
-    SchedulerLock lock(kernel);
+    KScopedSchedulerLock lock(kernel);
     if (!is_signaled) {
         LOG_TRACE(Kernel, "Handle is not signaled! object_id={}, object_type={}, object_name={}",
                   GetObjectId(), GetTypeName(), GetName());

src/core/hle/kernel/readable_event.h

@@ -4,8 +4,8 @@
 
 #pragma once
 
+#include "core/hle/kernel/k_synchronization_object.h"
 #include "core/hle/kernel/object.h"
-#include "core/hle/kernel/synchronization_object.h"
 
 union ResultCode;
 
@@ -14,7 +14,7 @@ namespace Kernel {
 class KernelCore;
 class WritableEvent;
 
-class ReadableEvent final : public SynchronizationObject {
+class ReadableEvent final : public KSynchronizationObject {
     friend class WritableEvent;
 
 public:
@@ -32,9 +32,6 @@ public:
         return HANDLE_TYPE;
     }
 
-    bool ShouldWait(const Thread* thread) const override;
-    void Acquire(Thread* thread) override;
-
     /// Unconditionally clears the readable event's state.
     void Clear();
 
@@ -46,11 +43,14 @@ public:
     ///      then ERR_INVALID_STATE will be returned.
     ResultCode Reset();
 
-    void Signal() override;
+    void Signal();
+
+    bool IsSignaled() const override;
 
 private:
     explicit ReadableEvent(KernelCore& kernel);
 
+    bool is_signaled{};
     std::string name; ///< Name of event (optional)
 };
 

src/core/hle/kernel/scheduler.cpp

@@ -1,819 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-//
-// SelectThreads, Yield functions originally by TuxSH.
-// licensed under GPLv2 or later under exception provided by the author.
-
-#include <algorithm>
-#include <mutex>
-#include <set>
-#include <unordered_set>
-#include <utility>
-
-#include "common/assert.h"
-#include "common/bit_util.h"
-#include "common/fiber.h"
-#include "common/logging/log.h"
-#include "core/arm/arm_interface.h"
-#include "core/core.h"
-#include "core/core_timing.h"
-#include "core/cpu_manager.h"
-#include "core/hle/kernel/kernel.h"
-#include "core/hle/kernel/physical_core.h"
-#include "core/hle/kernel/process.h"
-#include "core/hle/kernel/scheduler.h"
-#include "core/hle/kernel/time_manager.h"
-
-namespace Kernel {
-
-GlobalScheduler::GlobalScheduler(KernelCore& kernel) : kernel{kernel} {}
-
-GlobalScheduler::~GlobalScheduler() = default;
-
-void GlobalScheduler::AddThread(std::shared_ptr<Thread> thread) {
-    std::scoped_lock lock{global_list_guard};
-    thread_list.push_back(std::move(thread));
-}
-
-void GlobalScheduler::RemoveThread(std::shared_ptr<Thread> thread) {
-    std::scoped_lock lock{global_list_guard};
-    thread_list.erase(std::remove(thread_list.begin(), thread_list.end(), thread),
-                      thread_list.end());
-}
-
-u32 GlobalScheduler::SelectThreads() {
-    ASSERT(is_locked);
-    const auto update_thread = [](Thread* thread, Scheduler& sched) {
-        std::scoped_lock lock{sched.guard};
-        if (thread != sched.selected_thread_set.get()) {
-            if (thread == nullptr) {
-                ++sched.idle_selection_count;
-            }
-            sched.selected_thread_set = SharedFrom(thread);
-        }
-        const bool reschedule_pending =
-            sched.is_context_switch_pending || (sched.selected_thread_set != sched.current_thread);
-        sched.is_context_switch_pending = reschedule_pending;
-        std::atomic_thread_fence(std::memory_order_seq_cst);
-        return reschedule_pending;
-    };
-    if (!is_reselection_pending.load()) {
-        return 0;
-    }
-    std::array<Thread*, Core::Hardware::NUM_CPU_CORES> top_threads{};
-
-    u32 idle_cores{};
-
-    // Step 1: Get top thread in schedule queue.
-    for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-        Thread* top_thread =
-            scheduled_queue[core].empty() ? nullptr : scheduled_queue[core].front();
-        if (top_thread != nullptr) {
-            // TODO(Blinkhawk): Implement Thread Pinning
-        } else {
-            idle_cores |= (1U << core);
-        }
-        top_threads[core] = top_thread;
-    }
-
-    while (idle_cores != 0) {
-        u32 core_id = Common::CountTrailingZeroes32(idle_cores);
-
-        if (!suggested_queue[core_id].empty()) {
-            std::array<s32, Core::Hardware::NUM_CPU_CORES> migration_candidates{};
-            std::size_t num_candidates = 0;
-            auto iter = suggested_queue[core_id].begin();
-            Thread* suggested = nullptr;
-            // Step 2: Try selecting a suggested thread.
-            while (iter != suggested_queue[core_id].end()) {
-                suggested = *iter;
-                iter++;
-                s32 suggested_core_id = suggested->GetProcessorID();
-                Thread* top_thread =
-                    suggested_core_id >= 0 ? top_threads[suggested_core_id] : nullptr;
-                if (top_thread != suggested) {
-                    if (top_thread != nullptr &&
-                        top_thread->GetPriority() < THREADPRIO_MAX_CORE_MIGRATION) {
-                        suggested = nullptr;
-                        break;
-                        // There's a too high thread to do core migration, cancel
-                    }
-                    TransferToCore(suggested->GetPriority(), static_cast<s32>(core_id), suggested);
-                    break;
-                }
-                suggested = nullptr;
-                migration_candidates[num_candidates++] = suggested_core_id;
-            }
-            // Step 3: Select a suggested thread from another core
-            if (suggested == nullptr) {
-                for (std::size_t i = 0; i < num_candidates; i++) {
-                    s32 candidate_core = migration_candidates[i];
-                    suggested = top_threads[candidate_core];
-                    auto it = scheduled_queue[candidate_core].begin();
-                    it++;
-                    Thread* next = it != scheduled_queue[candidate_core].end() ? *it : nullptr;
-                    if (next != nullptr) {
-                        TransferToCore(suggested->GetPriority(), static_cast<s32>(core_id),
-                                       suggested);
-                        top_threads[candidate_core] = next;
-                        break;
-                    } else {
-                        suggested = nullptr;
-                    }
-                }
-            }
-            top_threads[core_id] = suggested;
-        }
-
-        idle_cores &= ~(1U << core_id);
-    }
-    u32 cores_needing_context_switch{};
-    for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-        Scheduler& sched = kernel.Scheduler(core);
-        ASSERT(top_threads[core] == nullptr ||
-               static_cast<u32>(top_threads[core]->GetProcessorID()) == core);
-        if (update_thread(top_threads[core], sched)) {
-            cores_needing_context_switch |= (1U << core);
-        }
-    }
-    return cores_needing_context_switch;
-}
-
-bool GlobalScheduler::YieldThread(Thread* yielding_thread) {
-    ASSERT(is_locked);
-    // Note: caller should use critical section, etc.
-    if (!yielding_thread->IsRunnable()) {
-        // Normally this case shouldn't happen except for SetThreadActivity.
-        is_reselection_pending.store(true, std::memory_order_release);
-        return false;
-    }
-    const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID());
-    const u32 priority = yielding_thread->GetPriority();
-
-    // Yield the thread
-    Reschedule(priority, core_id, yielding_thread);
-    const Thread* const winner = scheduled_queue[core_id].front();
-    if (kernel.GetCurrentHostThreadID() != core_id) {
-        is_reselection_pending.store(true, std::memory_order_release);
-    }
-
-    return AskForReselectionOrMarkRedundant(yielding_thread, winner);
-}
-
-bool GlobalScheduler::YieldThreadAndBalanceLoad(Thread* yielding_thread) {
-    ASSERT(is_locked);
-    // Note: caller should check if !thread.IsSchedulerOperationRedundant and use critical section,
-    // etc.
-    if (!yielding_thread->IsRunnable()) {
-        // Normally this case shouldn't happen except for SetThreadActivity.
-        is_reselection_pending.store(true, std::memory_order_release);
-        return false;
-    }
-    const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID());
-    const u32 priority = yielding_thread->GetPriority();
-
-    // Yield the thread
-    Reschedule(priority, core_id, yielding_thread);
-
-    std::array<Thread*, Core::Hardware::NUM_CPU_CORES> current_threads;
-    for (std::size_t i = 0; i < current_threads.size(); i++) {
-        current_threads[i] = scheduled_queue[i].empty() ? nullptr : scheduled_queue[i].front();
-    }
-
-    Thread* next_thread = scheduled_queue[core_id].front(priority);
-    Thread* winner = nullptr;
-    for (auto& thread : suggested_queue[core_id]) {
-        const s32 source_core = thread->GetProcessorID();
-        if (source_core >= 0) {
-            if (current_threads[source_core] != nullptr) {
-                if (thread == current_threads[source_core] ||
-                    current_threads[source_core]->GetPriority() < min_regular_priority) {
-                    continue;
-                }
-            }
-        }
-        if (next_thread->GetLastRunningTicks() >= thread->GetLastRunningTicks() ||
-            next_thread->GetPriority() < thread->GetPriority()) {
-            if (thread->GetPriority() <= priority) {
-                winner = thread;
-                break;
-            }
-        }
-    }
-
-    if (winner != nullptr) {
-        if (winner != yielding_thread) {
-            TransferToCore(winner->GetPriority(), s32(core_id), winner);
-        }
-    } else {
-        winner = next_thread;
-    }
-
-    if (kernel.GetCurrentHostThreadID() != core_id) {
-        is_reselection_pending.store(true, std::memory_order_release);
-    }
-
-    return AskForReselectionOrMarkRedundant(yielding_thread, winner);
-}
-
-bool GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread) {
-    ASSERT(is_locked);
-    // Note: caller should check if !thread.IsSchedulerOperationRedundant and use critical section,
-    // etc.
-    if (!yielding_thread->IsRunnable()) {
-        // Normally this case shouldn't happen except for SetThreadActivity.
-        is_reselection_pending.store(true, std::memory_order_release);
-        return false;
-    }
-    Thread* winner = nullptr;
-    const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID());
-
-    // Remove the thread from its scheduled mlq, put it on the corresponding "suggested" one instead
-    TransferToCore(yielding_thread->GetPriority(), -1, yielding_thread);
-
-    // If the core is idle, perform load balancing, excluding the threads that have just used this
-    // function...
-    if (scheduled_queue[core_id].empty()) {
-        // Here, "current_threads" is calculated after the ""yield"", unlike yield -1
-        std::array<Thread*, Core::Hardware::NUM_CPU_CORES> current_threads;
-        for (std::size_t i = 0; i < current_threads.size(); i++) {
-            current_threads[i] = scheduled_queue[i].empty() ? nullptr : scheduled_queue[i].front();
-        }
-        for (auto& thread : suggested_queue[core_id]) {
-            const s32 source_core = thread->GetProcessorID();
-            if (source_core < 0 || thread == current_threads[source_core]) {
-                continue;
-            }
-            if (current_threads[source_core] == nullptr ||
-                current_threads[source_core]->GetPriority() >= min_regular_priority) {
-                winner = thread;
-            }
-            break;
-        }
-        if (winner != nullptr) {
-            if (winner != yielding_thread) {
-                TransferToCore(winner->GetPriority(), static_cast<s32>(core_id), winner);
-            }
-        } else {
-            winner = yielding_thread;
-        }
-    } else {
-        winner = scheduled_queue[core_id].front();
-    }
-
-    if (kernel.GetCurrentHostThreadID() != core_id) {
-        is_reselection_pending.store(true, std::memory_order_release);
-    }
-
-    return AskForReselectionOrMarkRedundant(yielding_thread, winner);
-}
-
-void GlobalScheduler::PreemptThreads() {
-    ASSERT(is_locked);
-    for (std::size_t core_id = 0; core_id < Core::Hardware::NUM_CPU_CORES; core_id++) {
-        const u32 priority = preemption_priorities[core_id];
-
-        if (scheduled_queue[core_id].size(priority) > 0) {
-            if (scheduled_queue[core_id].size(priority) > 1) {
-                scheduled_queue[core_id].front(priority)->IncrementYieldCount();
-            }
-            scheduled_queue[core_id].yield(priority);
-            if (scheduled_queue[core_id].size(priority) > 1) {
-                scheduled_queue[core_id].front(priority)->IncrementYieldCount();
-            }
-        }
-
-        Thread* current_thread =
-            scheduled_queue[core_id].empty() ? nullptr : scheduled_queue[core_id].front();
-        Thread* winner = nullptr;
-        for (auto& thread : suggested_queue[core_id]) {
-            const s32 source_core = thread->GetProcessorID();
-            if (thread->GetPriority() != priority) {
-                continue;
-            }
-            if (source_core >= 0) {
-                Thread* next_thread = scheduled_queue[source_core].empty()
-                                          ? nullptr
-                                          : scheduled_queue[source_core].front();
-                if (next_thread != nullptr && next_thread->GetPriority() < 2) {
-                    break;
-                }
-                if (next_thread == thread) {
-                    continue;
-                }
-            }
-            if (current_thread != nullptr &&
-                current_thread->GetLastRunningTicks() >= thread->GetLastRunningTicks()) {
-                winner = thread;
-                break;
-            }
-        }
-
-        if (winner != nullptr) {
-            TransferToCore(winner->GetPriority(), s32(core_id), winner);
-            current_thread =
-                winner->GetPriority() <= current_thread->GetPriority() ? winner : current_thread;
-        }
-
-        if (current_thread != nullptr && current_thread->GetPriority() > priority) {
-            for (auto& thread : suggested_queue[core_id]) {
-                const s32 source_core = thread->GetProcessorID();
-                if (thread->GetPriority() < priority) {
-                    continue;
-                }
-                if (source_core >= 0) {
-                    Thread* next_thread = scheduled_queue[source_core].empty()
-                                              ? nullptr
-                                              : scheduled_queue[source_core].front();
-                    if (next_thread != nullptr && next_thread->GetPriority() < 2) {
-                        break;
-                    }
-                    if (next_thread == thread) {
-                        continue;
-                    }
-                }
-                if (current_thread != nullptr &&
-                    current_thread->GetLastRunningTicks() >= thread->GetLastRunningTicks()) {
-                    winner = thread;
-                    break;
-                }
-            }
-
-            if (winner != nullptr) {
-                TransferToCore(winner->GetPriority(), s32(core_id), winner);
-                current_thread = winner;
-            }
-        }
-
-        is_reselection_pending.store(true, std::memory_order_release);
-    }
-}
-
-void GlobalScheduler::EnableInterruptAndSchedule(u32 cores_pending_reschedule,
-                                                 Core::EmuThreadHandle global_thread) {
-    u32 current_core = global_thread.host_handle;
-    bool must_context_switch = global_thread.guest_handle != InvalidHandle &&
-                               (current_core < Core::Hardware::NUM_CPU_CORES);
-    while (cores_pending_reschedule != 0) {
-        u32 core = Common::CountTrailingZeroes32(cores_pending_reschedule);
-        ASSERT(core < Core::Hardware::NUM_CPU_CORES);
-        if (!must_context_switch || core != current_core) {
-            auto& phys_core = kernel.PhysicalCore(core);
-            phys_core.Interrupt();
-        } else {
-            must_context_switch = true;
-        }
-        cores_pending_reschedule &= ~(1U << core);
-    }
-    if (must_context_switch) {
-        auto& core_scheduler = kernel.CurrentScheduler();
-        kernel.ExitSVCProfile();
-        core_scheduler.TryDoContextSwitch();
-        kernel.EnterSVCProfile();
-    }
-}
-
-void GlobalScheduler::Suggest(u32 priority, std::size_t core, Thread* thread) {
-    ASSERT(is_locked);
-    suggested_queue[core].add(thread, priority);
-}
-
-void GlobalScheduler::Unsuggest(u32 priority, std::size_t core, Thread* thread) {
-    ASSERT(is_locked);
-    suggested_queue[core].remove(thread, priority);
-}
-
-void GlobalScheduler::Schedule(u32 priority, std::size_t core, Thread* thread) {
-    ASSERT(is_locked);
-    ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core.");
-    scheduled_queue[core].add(thread, priority);
-}
-
-void GlobalScheduler::SchedulePrepend(u32 priority, std::size_t core, Thread* thread) {
-    ASSERT(is_locked);
-    ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core.");
-    scheduled_queue[core].add(thread, priority, false);
-}
-
-void GlobalScheduler::Reschedule(u32 priority, std::size_t core, Thread* thread) {
-    ASSERT(is_locked);
-    scheduled_queue[core].remove(thread, priority);
-    scheduled_queue[core].add(thread, priority);
-}
-
-void GlobalScheduler::Unschedule(u32 priority, std::size_t core, Thread* thread) {
-    ASSERT(is_locked);
-    scheduled_queue[core].remove(thread, priority);
-}
-
-void GlobalScheduler::TransferToCore(u32 priority, s32 destination_core, Thread* thread) {
-    ASSERT(is_locked);
-    const bool schedulable = thread->GetPriority() < THREADPRIO_COUNT;
-    const s32 source_core = thread->GetProcessorID();
-    if (source_core == destination_core || !schedulable) {
-        return;
-    }
-    thread->SetProcessorID(destination_core);
-    if (source_core >= 0) {
-        Unschedule(priority, static_cast<u32>(source_core), thread);
-    }
-    if (destination_core >= 0) {
-        Unsuggest(priority, static_cast<u32>(destination_core), thread);
-        Schedule(priority, static_cast<u32>(destination_core), thread);
-    }
-    if (source_core >= 0) {
-        Suggest(priority, static_cast<u32>(source_core), thread);
-    }
-}
-
-bool GlobalScheduler::AskForReselectionOrMarkRedundant(Thread* current_thread,
-                                                       const Thread* winner) {
-    if (current_thread == winner) {
-        current_thread->IncrementYieldCount();
-        return true;
-    } else {
-        is_reselection_pending.store(true, std::memory_order_release);
-        return false;
-    }
-}
-
-void GlobalScheduler::AdjustSchedulingOnStatus(Thread* thread, u32 old_flags) {
-    if (old_flags == thread->scheduling_state) {
-        return;
-    }
-    ASSERT(is_locked);
-
-    if (old_flags == static_cast<u32>(ThreadSchedStatus::Runnable)) {
-        // In this case the thread was running, now it's pausing/exitting
-        if (thread->processor_id >= 0) {
-            Unschedule(thread->current_priority, static_cast<u32>(thread->processor_id), thread);
-        }
-
-        for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-            if (core != static_cast<u32>(thread->processor_id) &&
-                ((thread->affinity_mask >> core) & 1) != 0) {
-                Unsuggest(thread->current_priority, core, thread);
-            }
-        }
-    } else if (thread->scheduling_state == static_cast<u32>(ThreadSchedStatus::Runnable)) {
-        // The thread is now set to running from being stopped
-        if (thread->processor_id >= 0) {
-            Schedule(thread->current_priority, static_cast<u32>(thread->processor_id), thread);
-        }
-
-        for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-            if (core != static_cast<u32>(thread->processor_id) &&
-                ((thread->affinity_mask >> core) & 1) != 0) {
-                Suggest(thread->current_priority, core, thread);
-            }
-        }
-    }
-
-    SetReselectionPending();
-}
-
-void GlobalScheduler::AdjustSchedulingOnPriority(Thread* thread, u32 old_priority) {
-    if (thread->scheduling_state != static_cast<u32>(ThreadSchedStatus::Runnable)) {
-        return;
-    }
-    ASSERT(is_locked);
-    if (thread->processor_id >= 0) {
-        Unschedule(old_priority, static_cast<u32>(thread->processor_id), thread);
-    }
-
-    for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-        if (core != static_cast<u32>(thread->processor_id) &&
-            ((thread->affinity_mask >> core) & 1) != 0) {
-            Unsuggest(old_priority, core, thread);
-        }
-    }
-
-    if (thread->processor_id >= 0) {
-        if (thread == kernel.CurrentScheduler().GetCurrentThread()) {
-            SchedulePrepend(thread->current_priority, static_cast<u32>(thread->processor_id),
-                            thread);
-        } else {
-            Schedule(thread->current_priority, static_cast<u32>(thread->processor_id), thread);
-        }
-    }
-
-    for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-        if (core != static_cast<u32>(thread->processor_id) &&
-            ((thread->affinity_mask >> core) & 1) != 0) {
-            Suggest(thread->current_priority, core, thread);
-        }
-    }
-    thread->IncrementYieldCount();
-    SetReselectionPending();
-}
-
-void GlobalScheduler::AdjustSchedulingOnAffinity(Thread* thread, u64 old_affinity_mask,
-                                                 s32 old_core) {
-    if (thread->scheduling_state != static_cast<u32>(ThreadSchedStatus::Runnable) ||
-        thread->current_priority >= THREADPRIO_COUNT) {
-        return;
-    }
-    ASSERT(is_locked);
-
-    for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-        if (((old_affinity_mask >> core) & 1) != 0) {
-            if (core == static_cast<u32>(old_core)) {
-                Unschedule(thread->current_priority, core, thread);
-            } else {
-                Unsuggest(thread->current_priority, core, thread);
-            }
-        }
-    }
-
-    for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-        if (((thread->affinity_mask >> core) & 1) != 0) {
-            if (core == static_cast<u32>(thread->processor_id)) {
-                Schedule(thread->current_priority, core, thread);
-            } else {
-                Suggest(thread->current_priority, core, thread);
-            }
-        }
-    }
-
-    thread->IncrementYieldCount();
-    SetReselectionPending();
-}
-
-void GlobalScheduler::Shutdown() {
-    for (std::size_t core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
-        scheduled_queue[core].clear();
-        suggested_queue[core].clear();
-    }
-    thread_list.clear();
-}
-
-void GlobalScheduler::Lock() {
-    Core::EmuThreadHandle current_thread = kernel.GetCurrentEmuThreadID();
-    ASSERT(!current_thread.IsInvalid());
-    if (current_thread == current_owner) {
-        ++scope_lock;
-    } else {
-        inner_lock.lock();
-        is_locked = true;
-        current_owner = current_thread;
-        ASSERT(current_owner != Core::EmuThreadHandle::InvalidHandle());
-        scope_lock = 1;
-    }
-}
-
-void GlobalScheduler::Unlock() {
-    if (--scope_lock != 0) {
-        ASSERT(scope_lock > 0);
-        return;
-    }
-    u32 cores_pending_reschedule = SelectThreads();
-    Core::EmuThreadHandle leaving_thread = current_owner;
-    current_owner = Core::EmuThreadHandle::InvalidHandle();
-    scope_lock = 1;
-    is_locked = false;
-    inner_lock.unlock();
-    EnableInterruptAndSchedule(cores_pending_reschedule, leaving_thread);
-}
-
-Scheduler::Scheduler(Core::System& system, std::size_t core_id) : system(system), core_id(core_id) {
-    switch_fiber = std::make_shared<Common::Fiber>(std::function<void(void*)>(OnSwitch), this);
-}
-
-Scheduler::~Scheduler() = default;
-
-bool Scheduler::HaveReadyThreads() const {
-    return system.GlobalScheduler().HaveReadyThreads(core_id);
-}
-
-Thread* Scheduler::GetCurrentThread() const {
-    if (current_thread) {
-        return current_thread.get();
-    }
-    return idle_thread.get();
-}
-
-Thread* Scheduler::GetSelectedThread() const {
-    return selected_thread.get();
-}
-
-u64 Scheduler::GetLastContextSwitchTicks() const {
-    return last_context_switch_time;
-}
-
-void Scheduler::TryDoContextSwitch() {
-    auto& phys_core = system.Kernel().CurrentPhysicalCore();
-    if (phys_core.IsInterrupted()) {
-        phys_core.ClearInterrupt();
-    }
-    guard.lock();
-    if (is_context_switch_pending) {
-        SwitchContext();
-    } else {
-        guard.unlock();
-    }
-}
-
-void Scheduler::OnThreadStart() {
-    SwitchContextStep2();
-}
-
-void Scheduler::Unload(Thread* thread) {
-    if (thread) {
-        thread->last_running_ticks = system.CoreTiming().GetCPUTicks();
-        thread->SetIsRunning(false);
-        if (thread->IsContinuousOnSVC() && !thread->IsHLEThread()) {
-            system.ArmInterface(core_id).ExceptionalExit();
-            thread->SetContinuousOnSVC(false);
-        }
-        if (!thread->IsHLEThread() && !thread->HasExited()) {
-            Core::ARM_Interface& cpu_core = system.ArmInterface(core_id);
-            cpu_core.SaveContext(thread->GetContext32());
-            cpu_core.SaveContext(thread->GetContext64());
-            // Save the TPIDR_EL0 system register in case it was modified.
-            thread->SetTPIDR_EL0(cpu_core.GetTPIDR_EL0());
-            cpu_core.ClearExclusiveState();
-        }
-        thread->context_guard.unlock();
-    }
-}
-
-void Scheduler::Unload() {
-    Unload(current_thread.get());
-}
-
-void Scheduler::Reload(Thread* thread) {
-    if (thread) {
-        ASSERT_MSG(thread->GetSchedulingStatus() == ThreadSchedStatus::Runnable,
-                   "Thread must be runnable.");
-
-        // Cancel any outstanding wakeup events for this thread
-        thread->SetIsRunning(true);
-        thread->SetWasRunning(false);
-        thread->last_running_ticks = system.CoreTiming().GetCPUTicks();
-
-        auto* const thread_owner_process = thread->GetOwnerProcess();
-        if (thread_owner_process != nullptr) {
-            system.Kernel().MakeCurrentProcess(thread_owner_process);
-        }
-        if (!thread->IsHLEThread()) {
-            Core::ARM_Interface& cpu_core = system.ArmInterface(core_id);
-            cpu_core.LoadContext(thread->GetContext32());
-            cpu_core.LoadContext(thread->GetContext64());
-            cpu_core.SetTlsAddress(thread->GetTLSAddress());
-            cpu_core.SetTPIDR_EL0(thread->GetTPIDR_EL0());
-            cpu_core.ClearExclusiveState();
-        }
-    }
-}
-
-void Scheduler::Reload() {
-    Reload(current_thread.get());
-}
-
-void Scheduler::SwitchContextStep2() {
-    // Load context of new thread
-    Reload(selected_thread.get());
-
-    TryDoContextSwitch();
-}
-
-void Scheduler::SwitchContext() {
-    current_thread_prev = current_thread;
-    selected_thread = selected_thread_set;
-    Thread* previous_thread = current_thread_prev.get();
-    Thread* new_thread = selected_thread.get();
-    current_thread = selected_thread;
-
-    is_context_switch_pending = false;
-
-    if (new_thread == previous_thread) {
-        guard.unlock();
-        return;
-    }
-
-    Process* const previous_process = system.Kernel().CurrentProcess();
-
-    UpdateLastContextSwitchTime(previous_thread, previous_process);
-
-    // Save context for previous thread
-    Unload(previous_thread);
-
-    std::shared_ptr<Common::Fiber>* old_context;
-    if (previous_thread != nullptr) {
-        old_context = &previous_thread->GetHostContext();
-    } else {
-        old_context = &idle_thread->GetHostContext();
-    }
-    guard.unlock();
-
-    Common::Fiber::YieldTo(*old_context, switch_fiber);
-    /// When a thread wakes up, the scheduler may have changed to other in another core.
-    auto& next_scheduler = system.Kernel().CurrentScheduler();
-    next_scheduler.SwitchContextStep2();
-}
-
-void Scheduler::OnSwitch(void* this_scheduler) {
-    Scheduler* sched = static_cast<Scheduler*>(this_scheduler);
-    sched->SwitchToCurrent();
-}
-
-void Scheduler::SwitchToCurrent() {
-    while (true) {
-        {
-            std::scoped_lock lock{guard};
-            selected_thread = selected_thread_set;
-            current_thread = selected_thread;
-            is_context_switch_pending = false;
-        }
-        const auto is_switch_pending = [this] {
-            std::scoped_lock lock{guard};
-            return is_context_switch_pending;
-        };
-        do {
-            if (current_thread != nullptr && !current_thread->IsHLEThread()) {
-                current_thread->context_guard.lock();
-                if (!current_thread->IsRunnable()) {
-                    current_thread->context_guard.unlock();
-                    break;
-                }
-                if (static_cast<u32>(current_thread->GetProcessorID()) != core_id) {
-                    current_thread->context_guard.unlock();
-                    break;
-                }
-            }
-            std::shared_ptr<Common::Fiber>* next_context;
-            if (current_thread != nullptr) {
-                next_context = &current_thread->GetHostContext();
-            } else {
-                next_context = &idle_thread->GetHostContext();
-            }
-            Common::Fiber::YieldTo(switch_fiber, *next_context);
-        } while (!is_switch_pending());
-    }
-}
-
-void Scheduler::UpdateLastContextSwitchTime(Thread* thread, Process* process) {
-    const u64 prev_switch_ticks = last_context_switch_time;
-    const u64 most_recent_switch_ticks = system.CoreTiming().GetCPUTicks();
-    const u64 update_ticks = most_recent_switch_ticks - prev_switch_ticks;
-
-    if (thread != nullptr) {
-        thread->UpdateCPUTimeTicks(update_ticks);
-    }
-
-    if (process != nullptr) {
-        process->UpdateCPUTimeTicks(update_ticks);
-    }
-
-    last_context_switch_time = most_recent_switch_ticks;
-}
-
-void Scheduler::Initialize() {
-    std::string name = "Idle Thread Id:" + std::to_string(core_id);
-    std::function<void(void*)> init_func = Core::CpuManager::GetIdleThreadStartFunc();
-    void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater();
-    ThreadType type = static_cast<ThreadType>(THREADTYPE_KERNEL | THREADTYPE_HLE | THREADTYPE_IDLE);
-    auto thread_res = Thread::Create(system, type, name, 0, 64, 0, static_cast<u32>(core_id), 0,
-                                     nullptr, std::move(init_func), init_func_parameter);
-    idle_thread = std::move(thread_res).Unwrap();
-}
-
-void Scheduler::Shutdown() {
-    current_thread = nullptr;
-    selected_thread = nullptr;
-}
-
-SchedulerLock::SchedulerLock(KernelCore& kernel) : kernel{kernel} {
-    kernel.GlobalScheduler().Lock();
-}
-
-SchedulerLock::~SchedulerLock() {
-    kernel.GlobalScheduler().Unlock();
-}
-
-SchedulerLockAndSleep::SchedulerLockAndSleep(KernelCore& kernel, Handle& event_handle,
-                                             Thread* time_task, s64 nanoseconds)
-    : SchedulerLock{kernel}, event_handle{event_handle}, time_task{time_task}, nanoseconds{
-                                                                                   nanoseconds} {
-    event_handle = InvalidHandle;
-}
-
-SchedulerLockAndSleep::~SchedulerLockAndSleep() {
-    if (sleep_cancelled) {
-        return;
-    }
-    auto& time_manager = kernel.TimeManager();
-    time_manager.ScheduleTimeEvent(event_handle, time_task, nanoseconds);
-}
-
-void SchedulerLockAndSleep::Release() {
-    if (sleep_cancelled) {
-        return;
-    }
-    auto& time_manager = kernel.TimeManager();
-    time_manager.ScheduleTimeEvent(event_handle, time_task, nanoseconds);
-    sleep_cancelled = true;
-}
-
-} // namespace Kernel

src/core/hle/kernel/scheduler.h

@@ -1,320 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <atomic>
-#include <memory>
-#include <mutex>
-#include <vector>
-
-#include "common/common_types.h"
-#include "common/multi_level_queue.h"
-#include "common/spin_lock.h"
-#include "core/hardware_properties.h"
-#include "core/hle/kernel/thread.h"
-
-namespace Common {
-class Fiber;
-}
-
-namespace Core {
-class ARM_Interface;
-class System;
-} // namespace Core
-
-namespace Kernel {
-
-class KernelCore;
-class Process;
-class SchedulerLock;
-
-class GlobalScheduler final {
-public:
-    explicit GlobalScheduler(KernelCore& kernel);
-    ~GlobalScheduler();
-
-    /// Adds a new thread to the scheduler
-    void AddThread(std::shared_ptr<Thread> thread);
-
-    /// Removes a thread from the scheduler
-    void RemoveThread(std::shared_ptr<Thread> thread);
-
-    /// Returns a list of all threads managed by the scheduler
-    const std::vector<std::shared_ptr<Thread>>& GetThreadList() const {
-        return thread_list;
-    }
-
-    /// Notify the scheduler a thread's status has changed.
-    void AdjustSchedulingOnStatus(Thread* thread, u32 old_flags);
-
-    /// Notify the scheduler a thread's priority has changed.
-    void AdjustSchedulingOnPriority(Thread* thread, u32 old_priority);
-
-    /// Notify the scheduler a thread's core and/or affinity mask has changed.
-    void AdjustSchedulingOnAffinity(Thread* thread, u64 old_affinity_mask, s32 old_core);
-
-    /**
-     * Takes care of selecting the new scheduled threads in three steps:
-     *
-     * 1. First a thread is selected from the top of the priority queue. If no thread
-     *    is obtained then we move to step two, else we are done.
-     *
-     * 2. Second we try to get a suggested thread that's not assigned to any core or
-     *    that is not the top thread in that core.
-     *
-     * 3. Third is no suggested thread is found, we do a second pass and pick a running
-     *    thread in another core and swap it with its current thread.
-     *
-     * returns the cores needing scheduling.
-     */
-    u32 SelectThreads();
-
-    bool HaveReadyThreads(std::size_t core_id) const {
-        return !scheduled_queue[core_id].empty();
-    }
-
-    /**
-     * Takes a thread and moves it to the back of the it's priority list.
-     *
-     * @note This operation can be redundant and no scheduling is changed if marked as so.
-     */
-    bool YieldThread(Thread* thread);
-
-    /**
-     * Takes a thread and moves it to the back of the it's priority list.
-     * Afterwards, tries to pick a suggested thread from the suggested queue that has worse time or
-     * a better priority than the next thread in the core.
-     *
-     * @note This operation can be redundant and no scheduling is changed if marked as so.
-     */
-    bool YieldThreadAndBalanceLoad(Thread* thread);
-
-    /**
-     * Takes a thread and moves it out of the scheduling queue.
-     * and into the suggested queue. If no thread can be scheduled afterwards in that core,
-     * a suggested thread is obtained instead.
-     *
-     * @note This operation can be redundant and no scheduling is changed if marked as so.
-     */
-    bool YieldThreadAndWaitForLoadBalancing(Thread* thread);
-
-    /**
-     * Rotates the scheduling queues of threads at a preemption priority and then does
-     * some core rebalancing. Preemption priorities can be found in the array
-     * 'preemption_priorities'.
-     *
-     * @note This operation happens every 10ms.
-     */
-    void PreemptThreads();
-
-    u32 CpuCoresCount() const {
-        return Core::Hardware::NUM_CPU_CORES;
-    }
-
-    void SetReselectionPending() {
-        is_reselection_pending.store(true, std::memory_order_release);
-    }
-
-    bool IsReselectionPending() const {
-        return is_reselection_pending.load(std::memory_order_acquire);
-    }
-
-    void Shutdown();
-
-private:
-    friend class SchedulerLock;
-
-    /// Lock the scheduler to the current thread.
-    void Lock();
-
-    /// Unlocks the scheduler, reselects threads, interrupts cores for rescheduling
-    /// and reschedules current core if needed.
-    void Unlock();
-
-    void EnableInterruptAndSchedule(u32 cores_pending_reschedule,
-                                    Core::EmuThreadHandle global_thread);
-
-    /**
-     * Add a thread to the suggested queue of a cpu core. Suggested threads may be
-     * picked if no thread is scheduled to run on the core.
-     */
-    void Suggest(u32 priority, std::size_t core, Thread* thread);
-
-    /**
-     * Remove a thread to the suggested queue of a cpu core. Suggested threads may be
-     * picked if no thread is scheduled to run on the core.
-     */
-    void Unsuggest(u32 priority, std::size_t core, Thread* thread);
-
-    /**
-     * Add a thread to the scheduling queue of a cpu core. The thread is added at the
-     * back the queue in its priority level.
-     */
-    void Schedule(u32 priority, std::size_t core, Thread* thread);
-
-    /**
-     * Add a thread to the scheduling queue of a cpu core. The thread is added at the
-     * front the queue in its priority level.
-     */
-    void SchedulePrepend(u32 priority, std::size_t core, Thread* thread);
-
-    /// Reschedule an already scheduled thread based on a new priority
-    void Reschedule(u32 priority, std::size_t core, Thread* thread);
-
-    /// Unschedules a thread.
-    void Unschedule(u32 priority, std::size_t core, Thread* thread);
-
-    /**
-     * Transfers a thread into an specific core. If the destination_core is -1
-     * it will be unscheduled from its source code and added into its suggested
-     * queue.
-     */
-    void TransferToCore(u32 priority, s32 destination_core, Thread* thread);
-
-    bool AskForReselectionOrMarkRedundant(Thread* current_thread, const Thread* winner);
-
-    static constexpr u32 min_regular_priority = 2;
-    std::array<Common::MultiLevelQueue<Thread*, THREADPRIO_COUNT>, Core::Hardware::NUM_CPU_CORES>
-        scheduled_queue;
-    std::array<Common::MultiLevelQueue<Thread*, THREADPRIO_COUNT>, Core::Hardware::NUM_CPU_CORES>
-        suggested_queue;
-    std::atomic<bool> is_reselection_pending{false};
-
-    // The priority levels at which the global scheduler preempts threads every 10 ms. They are
-    // ordered from Core 0 to Core 3.
-    std::array<u32, Core::Hardware::NUM_CPU_CORES> preemption_priorities = {59, 59, 59, 62};
-
-    /// Scheduler lock mechanisms.
-    bool is_locked{};
-    std::mutex inner_lock;
-    std::atomic<s64> scope_lock{};
-    Core::EmuThreadHandle current_owner{Core::EmuThreadHandle::InvalidHandle()};
-
-    Common::SpinLock global_list_guard{};
-
-    /// Lists all thread ids that aren't deleted/etc.
-    std::vector<std::shared_ptr<Thread>> thread_list;
-    KernelCore& kernel;
-};
-
-class Scheduler final {
-public:
-    explicit Scheduler(Core::System& system, std::size_t core_id);
-    ~Scheduler();
-
-    /// Returns whether there are any threads that are ready to run.
-    bool HaveReadyThreads() const;
-
-    /// Reschedules to the next available thread (call after current thread is suspended)
-    void TryDoContextSwitch();
-
-    /// The next two are for SingleCore Only.
-    /// Unload current thread before preempting core.
-    void Unload(Thread* thread);
-    void Unload();
-    /// Reload current thread after core preemption.
-    void Reload(Thread* thread);
-    void Reload();
-
-    /// Gets the current running thread
-    Thread* GetCurrentThread() const;
-
-    /// Gets the currently selected thread from the top of the multilevel queue
-    Thread* GetSelectedThread() const;
-
-    /// Gets the timestamp for the last context switch in ticks.
-    u64 GetLastContextSwitchTicks() const;
-
-    bool ContextSwitchPending() const {
-        return is_context_switch_pending;
-    }
-
-    void Initialize();
-
-    /// Shutdowns the scheduler.
-    void Shutdown();
-
-    void OnThreadStart();
-
-    std::shared_ptr<Common::Fiber>& ControlContext() {
-        return switch_fiber;
-    }
-
-    const std::shared_ptr<Common::Fiber>& ControlContext() const {
-        return switch_fiber;
-    }
-
-private:
-    friend class GlobalScheduler;
-
-    /// Switches the CPU's active thread context to that of the specified thread
-    void SwitchContext();
-
-    /// When a thread wakes up, it must run this through it's new scheduler
-    void SwitchContextStep2();
-
-    /**
-     * Called on every context switch to update the internal timestamp
-     * This also updates the running time ticks for the given thread and
-     * process using the following difference:
-     *
-     * ticks += most_recent_ticks - last_context_switch_ticks
-     *
-     * The internal tick timestamp for the scheduler is simply the
-     * most recent tick count retrieved. No special arithmetic is
-     * applied to it.
-     */
-    void UpdateLastContextSwitchTime(Thread* thread, Process* process);
-
-    static void OnSwitch(void* this_scheduler);
-    void SwitchToCurrent();
-
-    std::shared_ptr<Thread> current_thread = nullptr;
-    std::shared_ptr<Thread> selected_thread = nullptr;
-    std::shared_ptr<Thread> current_thread_prev = nullptr;
-    std::shared_ptr<Thread> selected_thread_set = nullptr;
-    std::shared_ptr<Thread> idle_thread = nullptr;
-
-    std::shared_ptr<Common::Fiber> switch_fiber = nullptr;
-
-    Core::System& system;
-    u64 last_context_switch_time = 0;
-    u64 idle_selection_count = 0;
-    const std::size_t core_id;
-
-    Common::SpinLock guard{};
-
-    bool is_context_switch_pending = false;
-};
-
-class SchedulerLock {
-public:
-    [[nodiscard]] explicit SchedulerLock(KernelCore& kernel);
-    ~SchedulerLock();
-
-protected:
-    KernelCore& kernel;
-};
-
-class SchedulerLockAndSleep : public SchedulerLock {
-public:
-    explicit SchedulerLockAndSleep(KernelCore& kernel, Handle& event_handle, Thread* time_task,
-                                   s64 nanoseconds);
-    ~SchedulerLockAndSleep();
-
-    void CancelSleep() {
-        sleep_cancelled = true;
-    }
-
-    void Release();
-
-private:
-    Handle& event_handle;
-    Thread* time_task;
-    s64 nanoseconds;
-    bool sleep_cancelled{};
-};
-
-} // namespace Kernel

src/core/hle/kernel/server_port.cpp

@@ -13,7 +13,7 @@
 
 namespace Kernel {
 
-ServerPort::ServerPort(KernelCore& kernel) : SynchronizationObject{kernel} {}
+ServerPort::ServerPort(KernelCore& kernel) : KSynchronizationObject{kernel} {}
 ServerPort::~ServerPort() = default;
 
 ResultVal<std::shared_ptr<ServerSession>> ServerPort::Accept() {
@@ -28,15 +28,9 @@ ResultVal<std::shared_ptr<ServerSession>> ServerPort::Accept() {
 
 void ServerPort::AppendPendingSession(std::shared_ptr<ServerSession> pending_session) {
     pending_sessions.push_back(std::move(pending_session));
-}
-
-bool ServerPort::ShouldWait(const Thread* thread) const {
-    // If there are no pending sessions, we wait until a new one is added.
-    return pending_sessions.empty();
-}
-
-void ServerPort::Acquire(Thread* thread) {
-    ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
+    if (pending_sessions.size() == 1) {
+        NotifyAvailable();
+    }
 }
 
 bool ServerPort::IsSignaled() const {

src/core/hle/kernel/server_port.h

@@ -9,8 +9,8 @@
 #include <utility>
 #include <vector>
 #include "common/common_types.h"
+#include "core/hle/kernel/k_synchronization_object.h"
 #include "core/hle/kernel/object.h"
-#include "core/hle/kernel/synchronization_object.h"
 #include "core/hle/result.h"
 
 namespace Kernel {
@@ -20,7 +20,7 @@ class KernelCore;
 class ServerSession;
 class SessionRequestHandler;
 
-class ServerPort final : public SynchronizationObject {
+class ServerPort final : public KSynchronizationObject {
 public:
     explicit ServerPort(KernelCore& kernel);
     ~ServerPort() override;
@@ -79,9 +79,6 @@ public:
     /// waiting to be accepted by this port.
     void AppendPendingSession(std::shared_ptr<ServerSession> pending_session);
 
-    bool ShouldWait(const Thread* thread) const override;
-    void Acquire(Thread* thread) override;
-
     bool IsSignaled() const override;
 
 private:

src/core/hle/kernel/server_session.cpp

@@ -14,9 +14,9 @@
 #include "core/hle/kernel/client_session.h"
 #include "core/hle/kernel/handle_table.h"
 #include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/k_scheduler.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/server_session.h"
 #include "core/hle/kernel/session.h"
 #include "core/hle/kernel/thread.h"
@@ -24,34 +24,24 @@
 
 namespace Kernel {
 
-ServerSession::ServerSession(KernelCore& kernel) : SynchronizationObject{kernel} {}
-ServerSession::~ServerSession() = default;
+ServerSession::ServerSession(KernelCore& kernel) : KSynchronizationObject{kernel} {}
+
+ServerSession::~ServerSession() {
+    kernel.ReleaseServiceThread(service_thread);
+}
 
 ResultVal<std::shared_ptr<ServerSession>> ServerSession::Create(KernelCore& kernel,
                                                                 std::shared_ptr<Session> parent,
                                                                 std::string name) {
     std::shared_ptr<ServerSession> session{std::make_shared<ServerSession>(kernel)};
 
-    session->request_event =
-        Core::Timing::CreateEvent(name, [session](std::uintptr_t, std::chrono::nanoseconds) {
-            session->CompleteSyncRequest();
-        });
     session->name = std::move(name);
     session->parent = std::move(parent);
+    session->service_thread = kernel.CreateServiceThread(session->name);
 
     return MakeResult(std::move(session));
 }
 
-bool ServerSession::ShouldWait(const Thread* thread) const {
-    // Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
-    if (!parent->Client()) {
-        return false;
-    }
-
-    // Wait if we have no pending requests, or if we're currently handling a request.
-    return pending_requesting_threads.empty() || currently_handling != nullptr;
-}
-
 bool ServerSession::IsSignaled() const {
     // Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
     if (!parent->Client()) {
@@ -62,15 +52,6 @@ bool ServerSession::IsSignaled() const {
     return !pending_requesting_threads.empty() && currently_handling == nullptr;
 }
 
-void ServerSession::Acquire(Thread* thread) {
-    ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
-    // We are now handling a request, pop it from the stack.
-    // TODO(Subv): What happens if the client endpoint is closed before any requests are made?
-    ASSERT(!pending_requesting_threads.empty());
-    currently_handling = pending_requesting_threads.back();
-    pending_requesting_threads.pop_back();
-}
-
 void ServerSession::ClientDisconnected() {
     // We keep a shared pointer to the hle handler to keep it alive throughout
     // the call to ClientDisconnected, as ClientDisconnected invalidates the
@@ -142,16 +123,16 @@ ResultCode ServerSession::QueueSyncRequest(std::shared_ptr<Thread> thread,
         std::make_shared<HLERequestContext>(kernel, memory, SharedFrom(this), std::move(thread));
 
     context->PopulateFromIncomingCommandBuffer(kernel.CurrentProcess()->GetHandleTable(), cmd_buf);
-    request_queue.Push(std::move(context));
+
+    if (auto strong_ptr = service_thread.lock()) {
+        strong_ptr->QueueSyncRequest(*this, std::move(context));
+        return RESULT_SUCCESS;
+    }
 
     return RESULT_SUCCESS;
 }
 
-ResultCode ServerSession::CompleteSyncRequest() {
-    ASSERT(!request_queue.Empty());
-
-    auto& context = *request_queue.Front();
-
+ResultCode ServerSession::CompleteSyncRequest(HLERequestContext& context) {
     ResultCode result = RESULT_SUCCESS;
     // If the session has been converted to a domain, handle the domain request
     if (IsDomain() && context.HasDomainMessageHeader()) {
@@ -170,25 +151,20 @@ ResultCode ServerSession::CompleteSyncRequest() {
 
     // Some service requests require the thread to block
     {
-        SchedulerLock lock(kernel);
+        KScopedSchedulerLock lock(kernel);
         if (!context.IsThreadWaiting()) {
-            context.GetThread().ResumeFromWait();
+            context.GetThread().Wakeup();
             context.GetThread().SetSynchronizationResults(nullptr, result);
         }
     }
 
-    request_queue.Pop();
-
     return result;
 }
 
 ResultCode ServerSession::HandleSyncRequest(std::shared_ptr<Thread> thread,
                                             Core::Memory::Memory& memory,
                                             Core::Timing::CoreTiming& core_timing) {
-    const ResultCode result = QueueSyncRequest(std::move(thread), memory);
-    const auto delay = std::chrono::nanoseconds{kernel.IsMulticore() ? 0 : 20000};
-    core_timing.ScheduleEvent(delay, request_event, {});
-    return result;
+    return QueueSyncRequest(std::move(thread), memory);
 }
 
 } // namespace Kernel

src/core/hle/kernel/server_session.h

@@ -10,7 +10,8 @@
 #include <vector>
 
 #include "common/threadsafe_queue.h"
-#include "core/hle/kernel/synchronization_object.h"
+#include "core/hle/kernel/k_synchronization_object.h"
+#include "core/hle/kernel/service_thread.h"
 #include "core/hle/result.h"
 
 namespace Core::Memory {
@@ -42,7 +43,9 @@ class Thread;
  * After the server replies to the request, the response is marshalled back to the caller's
  * TLS buffer and control is transferred back to it.
  */
-class ServerSession final : public SynchronizationObject {
+class ServerSession final : public KSynchronizationObject {
+    friend class ServiceThread;
+
 public:
     explicit ServerSession(KernelCore& kernel);
     ~ServerSession() override;
@@ -74,8 +77,6 @@ public:
         return parent.get();
     }
 
-    bool IsSignaled() const override;
-
     /**
      * Sets the HLE handler for the session. This handler will be called to service IPC requests
      * instead of the regular IPC machinery. (The regular IPC machinery is currently not
@@ -97,10 +98,6 @@ public:
     ResultCode HandleSyncRequest(std::shared_ptr<Thread> thread, Core::Memory::Memory& memory,
                                  Core::Timing::CoreTiming& core_timing);
 
-    bool ShouldWait(const Thread* thread) const override;
-
-    void Acquire(Thread* thread) override;
-
     /// Called when a client disconnection occurs.
     void ClientDisconnected();
 
@@ -127,12 +124,14 @@ public:
         convert_to_domain = true;
     }
 
+    bool IsSignaled() const override;
+
 private:
     /// Queues a sync request from the emulated application.
     ResultCode QueueSyncRequest(std::shared_ptr<Thread> thread, Core::Memory::Memory& memory);
 
     /// Completes a sync request from the emulated application.
-    ResultCode CompleteSyncRequest();
+    ResultCode CompleteSyncRequest(HLERequestContext& context);
 
     /// Handles a SyncRequest to a domain, forwarding the request to the proper object or closing an
     /// object handle.
@@ -163,11 +162,8 @@ private:
     /// The name of this session (optional)
     std::string name;
 
-    /// Core timing event used to schedule the service request at some point in the future
-    std::shared_ptr<Core::Timing::EventType> request_event;
-
-    /// Queue of scheduled service requests
-    Common::MPSCQueue<std::shared_ptr<Kernel::HLERequestContext>> request_queue;
+    /// Thread to dispatch service requests
+    std::weak_ptr<ServiceThread> service_thread;
 };
 
 } // namespace Kernel

src/core/hle/kernel/service_thread.cpp

@@ -0,0 +1,110 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <condition_variable>
+#include <functional>
+#include <mutex>
+#include <thread>
+#include <vector>
+#include <queue>
+
+#include "common/assert.h"
+#include "common/scope_exit.h"
+#include "common/thread.h"
+#include "core/core.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/server_session.h"
+#include "core/hle/kernel/service_thread.h"
+#include "core/hle/lock.h"
+#include "video_core/renderer_base.h"
+
+namespace Kernel {
+
+class ServiceThread::Impl final {
+public:
+    explicit Impl(KernelCore& kernel, std::size_t num_threads, const std::string& name);
+    ~Impl();
+
+    void QueueSyncRequest(ServerSession& session, std::shared_ptr<HLERequestContext>&& context);
+
+private:
+    std::vector<std::thread> threads;
+    std::queue<std::function<void()>> requests;
+    std::mutex queue_mutex;
+    std::condition_variable condition;
+    const std::string service_name;
+    bool stop{};
+};
+
+ServiceThread::Impl::Impl(KernelCore& kernel, std::size_t num_threads, const std::string& name)
+    : service_name{name} {
+    for (std::size_t i = 0; i < num_threads; ++i)
+        threads.emplace_back([this, &kernel] {
+            Common::SetCurrentThreadName(std::string{"yuzu:HleService:" + service_name}.c_str());
+
+            // Wait for first request before trying to acquire a render context
+            {
+                std::unique_lock lock{queue_mutex};
+                condition.wait(lock, [this] { return stop || !requests.empty(); });
+            }
+
+            kernel.RegisterHostThread();
+
+            while (true) {
+                std::function<void()> task;
+
+                {
+                    std::unique_lock lock{queue_mutex};
+                    condition.wait(lock, [this] { return stop || !requests.empty(); });
+                    if (stop || requests.empty()) {
+                        return;
+                    }
+                    task = std::move(requests.front());
+                    requests.pop();
+                }
+
+                task();
+            }
+        });
+}
+
+void ServiceThread::Impl::QueueSyncRequest(ServerSession& session,
+                                           std::shared_ptr<HLERequestContext>&& context) {
+    {
+        std::unique_lock lock{queue_mutex};
+
+        // ServerSession owns the service thread, so we cannot caption a strong pointer here in the
+        // event that the ServerSession is terminated.
+        std::weak_ptr<ServerSession> weak_ptr{SharedFrom(&session)};
+        requests.emplace([weak_ptr, context{std::move(context)}]() {
+            if (auto strong_ptr = weak_ptr.lock()) {
+                strong_ptr->CompleteSyncRequest(*context);
+            }
+        });
+    }
+    condition.notify_one();
+}
+
+ServiceThread::Impl::~Impl() {
+    {
+        std::unique_lock lock{queue_mutex};
+        stop = true;
+    }
+    condition.notify_all();
+    for (std::thread& thread : threads) {
+        thread.join();
+    }
+}
+
+ServiceThread::ServiceThread(KernelCore& kernel, std::size_t num_threads, const std::string& name)
+    : impl{std::make_unique<Impl>(kernel, num_threads, name)} {}
+
+ServiceThread::~ServiceThread() = default;
+
+void ServiceThread::QueueSyncRequest(ServerSession& session,
+                                     std::shared_ptr<HLERequestContext>&& context) {
+    impl->QueueSyncRequest(session, std::move(context));
+}
+
+} // namespace Kernel

src/core/hle/kernel/service_thread.h

@@ -0,0 +1,28 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+namespace Kernel {
+
+class HLERequestContext;
+class KernelCore;
+class ServerSession;
+
+class ServiceThread final {
+public:
+    explicit ServiceThread(KernelCore& kernel, std::size_t num_threads, const std::string& name);
+    ~ServiceThread();
+
+    void QueueSyncRequest(ServerSession& session, std::shared_ptr<HLERequestContext>&& context);
+
+private:
+    class Impl;
+    std::unique_ptr<Impl> impl;
+};
+
+} // namespace Kernel

src/core/hle/kernel/session.cpp

@@ -9,7 +9,7 @@
 
 namespace Kernel {
 
-Session::Session(KernelCore& kernel) : SynchronizationObject{kernel} {}
+Session::Session(KernelCore& kernel) : KSynchronizationObject{kernel} {}
 Session::~Session() = default;
 
 Session::SessionPair Session::Create(KernelCore& kernel, std::string name) {
@@ -24,18 +24,9 @@ Session::SessionPair Session::Create(KernelCore& kernel, std::string name) {
     return std::make_pair(std::move(client_session), std::move(server_session));
 }
 
-bool Session::ShouldWait(const Thread* thread) const {
-    UNIMPLEMENTED();
-    return {};
-}
-
 bool Session::IsSignaled() const {
     UNIMPLEMENTED();
     return true;
 }
 
-void Session::Acquire(Thread* thread) {
-    UNIMPLEMENTED();
-}
-
 } // namespace Kernel