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[ampr] more improvements to the Ampr library, generally for performance

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This commit is contained in:
ParantezTech
2026-07-01 13:50:52 +03:00
parent dd5e524879
commit c3019b78d6
1 changed files with 18 additions and 4 deletions
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src/SharpEmu.Libs/Ampr/AmprExports.cs
+18 -4
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@@ -3,6 +3,7 @@
using SharpEmu.HLE;
using SharpEmu.Libs.Kernel;
using System.Buffers;
using System.Buffers.Binary;
using System.Collections.Concurrent;
@@ -25,6 +26,9 @@ public static class AmprExports
private static readonly ConcurrentDictionary<ulong, CommandBufferState> _commandBuffers = new();
private static readonly bool _traceAmpr =
string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR"), "1", StringComparison.Ordinal);
private static readonly bool _traceAmprReads =
_traceAmpr ||
string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR_READS"), "1", StringComparison.Ordinal);
private sealed class CommandBufferState
{
@@ -625,12 +629,18 @@ public static class AmprExports
return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
}
const int ChunkSize = 64 * 1024;
var buffer = new byte[(int)Math.Min((ulong)ChunkSize, size)];
const int ChunkSize = 1024 * 1024;
var buffer = ArrayPool<byte>.Shared.Rent((int)Math.Min((ulong)ChunkSize, size));
try
{
using var stream = new FileStream(hostPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete);
using var stream = new FileStream(
hostPath,
FileMode.Open,
FileAccess.Read,
FileShare.ReadWrite | FileShare.Delete,
ChunkSize,
FileOptions.SequentialScan);
if (fileOffset >= (ulong)stream.Length)
{
return (int)OrbisGen2Result.ORBIS_GEN2_OK;
@@ -663,6 +673,10 @@ public static class AmprExports
{
return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
}
finally
{
ArrayPool<byte>.Shared.Return(buffer);
}
return (int)OrbisGen2Result.ORBIS_GEN2_OK;
}
@@ -831,7 +845,7 @@ public static class AmprExports
string? hostPath,
int result)
{
if (!_traceAmpr)
if (!_traceAmprReads)
{
return;
}