[Kernel] Implement pthread semaphore exports (#424)

src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.Imports.cs

@@ -1438,6 +1438,9 @@ public sealed partial class DirectExecutionBackend
 		var expectedMutexTrylockBusy =
 			string.Equals(nid, "K-jXhbt2gn4", StringComparison.Ordinal) &&
 			result == OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY;
+		var expectedSemaphoreTrywaitAgain =
+			string.Equals(nid, "H2a+IN9TP0E", StringComparison.Ordinal) &&
+			result == OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN;
 		var expectedNetAcceptWouldBlock =
 			string.Equals(nid, "PIWqhn9oSxc", StringComparison.Ordinal) &&
 			resultValue == unchecked((int)0x80410123);
@@ -1451,6 +1454,7 @@ public sealed partial class DirectExecutionBackend
 			!expectedTimedWaitTimeout &&
 			!expectedEqueueTimeout &&
 			!expectedMutexTrylockBusy &&
+			!expectedSemaphoreTrywaitAgain &&
 			!expectedNetAcceptWouldBlock &&
 			!expectedUserServiceNoEvent &&
 			!expectedPrivacyInvalidParameter)

src/SharpEmu.Libs/Kernel/KernelSemaphoreCompatExports.cs

@@ -428,6 +428,22 @@ public static class KernelSemaphoreCompatExports
         return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
     }
 
+    [SysAbiExport(
+        Nid = "GEnUkDZoUwY",
+        ExportName = "scePthreadSemInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadSemInit(CpuContext ctx)
+    {
+        // scePthreadSemInit(sem, flag, value, name) seems to only support private semaphores
+        if (ctx[CpuRegister.Rsi] != 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        return PosixSemInit(ctx);
+    }
+
     [SysAbiExport(
         Nid = "YCV5dGGBcCo",
         ExportName = "sem_wait",
@@ -446,6 +462,13 @@ public static class KernelSemaphoreCompatExports
         return KernelWaitSema(ctx);
     }
 
+    [SysAbiExport(
+        Nid = "C36iRE0F5sE",
+        ExportName = "scePthreadSemWait",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadSemWait(CpuContext ctx) => PosixSemWait(ctx);
+
     [SysAbiExport(
         Nid = "WBWzsRifCEA",
         ExportName = "sem_trywait",
@@ -463,6 +486,19 @@ public static class KernelSemaphoreCompatExports
         return KernelPollSema(ctx, handle, 1);
     }
 
+    [SysAbiExport(
+        Nid = "H2a+IN9TP0E",
+        ExportName = "scePthreadSemTrywait",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadSemTryWait(CpuContext ctx)
+    {
+        var result = PosixSemTryWait(ctx);
+        return result == (int)OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY
+            ? SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN)
+            : result;
+    }
+
     [SysAbiExport(
         Nid = "w5IHyvahg-o",
         ExportName = "sem_timedwait",
@@ -499,6 +535,13 @@ public static class KernelSemaphoreCompatExports
         return KernelSignalSema(ctx, handle, 1);
     }
 
+    [SysAbiExport(
+        Nid = "aishVAiFaYM",
+        ExportName = "scePthreadSemPost",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadSemPost(CpuContext ctx) => PosixSemPost(ctx);
+
     [SysAbiExport(
         Nid = "Bq+LRV-N6Hk",
         ExportName = "sem_getvalue",
@@ -549,6 +592,13 @@ public static class KernelSemaphoreCompatExports
         return result;
     }
 
+    [SysAbiExport(
+        Nid = "Vwc+L05e6oE",
+        ExportName = "scePthreadSemDestroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadSemDestroy(CpuContext ctx) => PosixSemDestroy(ctx);
+
     private static bool TryGetPosixSemaphoreHandle(CpuContext ctx, ulong semaphoreAddress, out uint handle)
     {
         handle = 0;