diff options
| author | TSR Berry <20988865+TSRBerry@users.noreply.github.com> | 2023-04-08 01:22:00 +0200 |
|---|---|---|
| committer | Mary <thog@protonmail.com> | 2023-04-27 23:51:14 +0200 |
| commit | cee712105850ac3385cd0091a923438167433f9f (patch) | |
| tree | 4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs | |
| parent | cd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff) | |
Move solution and projects to src
Diffstat (limited to 'Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs')
| -rw-r--r-- | Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs b/Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs deleted file mode 100644 index 5b0bc07e..00000000 --- a/Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs +++ /dev/null @@ -1,163 +0,0 @@ -using System; -using System.Runtime.CompilerServices; -using System.Runtime.InteropServices; -using System.Runtime.InteropServices.Marshalling; -using System.Runtime.Versioning; -using System.Threading; - -using static Ryujinx.Common.Memory.PartialUnmaps.PartialUnmapHelpers; - -namespace Ryujinx.Common.Memory.PartialUnmaps -{ - /// <summary> - /// State for partial unmaps. Intended to be used on Windows. - /// </summary> - [StructLayout(LayoutKind.Sequential, Pack = 1)] - public partial struct PartialUnmapState - { - public NativeReaderWriterLock PartialUnmapLock; - public int PartialUnmapsCount; - public ThreadLocalMap<int> LocalCounts; - - public readonly static int PartialUnmapLockOffset; - public readonly static int PartialUnmapsCountOffset; - public readonly static int LocalCountsOffset; - - public readonly static IntPtr GlobalState; - - [SupportedOSPlatform("windows")] - [LibraryImport("kernel32.dll")] - private static partial int GetCurrentThreadId(); - - [SupportedOSPlatform("windows")] - [LibraryImport("kernel32.dll", SetLastError = true)] - private static partial IntPtr OpenThread(int dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, uint dwThreadId); - - [SupportedOSPlatform("windows")] - [LibraryImport("kernel32.dll", SetLastError = true)] - [return: MarshalAs (UnmanagedType.Bool)] - private static partial bool CloseHandle(IntPtr hObject); - - [SupportedOSPlatform("windows")] - [LibraryImport("kernel32.dll", SetLastError = true)] - [return: MarshalAs(UnmanagedType.Bool)] - private static partial bool GetExitCodeThread(IntPtr hThread, out uint lpExitCode); - - /// <summary> - /// Creates a global static PartialUnmapState and populates the field offsets. - /// </summary> - static unsafe PartialUnmapState() - { - PartialUnmapState instance = new PartialUnmapState(); - - PartialUnmapLockOffset = OffsetOf(ref instance, ref instance.PartialUnmapLock); - PartialUnmapsCountOffset = OffsetOf(ref instance, ref instance.PartialUnmapsCount); - LocalCountsOffset = OffsetOf(ref instance, ref instance.LocalCounts); - - int size = Unsafe.SizeOf<PartialUnmapState>(); - GlobalState = Marshal.AllocHGlobal(size); - Unsafe.InitBlockUnaligned((void*)GlobalState, 0, (uint)size); - } - - /// <summary> - /// Resets the global state. - /// </summary> - public static unsafe void Reset() - { - int size = Unsafe.SizeOf<PartialUnmapState>(); - Unsafe.InitBlockUnaligned((void*)GlobalState, 0, (uint)size); - } - - /// <summary> - /// Gets a reference to the global state. - /// </summary> - /// <returns>A reference to the global state</returns> - public static unsafe ref PartialUnmapState GetRef() - { - return ref Unsafe.AsRef<PartialUnmapState>((void*)GlobalState); - } - - /// <summary> - /// Checks if an access violation handler should retry execution due to a fault caused by partial unmap. - /// </summary> - /// <remarks> - /// Due to Windows limitations, <see cref="UnmapView"/> might need to unmap more memory than requested. - /// The additional memory that was unmapped is later remapped, however this leaves a time gap where the - /// memory might be accessed but is unmapped. Users of the API must compensate for that by catching the - /// access violation and retrying if it happened between the unmap and remap operation. - /// This method can be used to decide if retrying in such cases is necessary or not. - /// - /// This version of the function is not used, but serves as a reference for the native - /// implementation in ARMeilleure. - /// </remarks> - /// <returns>True if execution should be retried, false otherwise</returns> - [SupportedOSPlatform("windows")] - public bool RetryFromAccessViolation() - { - PartialUnmapLock.AcquireReaderLock(); - - int threadID = GetCurrentThreadId(); - int threadIndex = LocalCounts.GetOrReserve(threadID, 0); - - if (threadIndex == -1) - { - // Out of thread local space... try again later. - - PartialUnmapLock.ReleaseReaderLock(); - - return true; - } - - ref int threadLocalPartialUnmapsCount = ref LocalCounts.GetValue(threadIndex); - - bool retry = threadLocalPartialUnmapsCount != PartialUnmapsCount; - if (retry) - { - threadLocalPartialUnmapsCount = PartialUnmapsCount; - } - - PartialUnmapLock.ReleaseReaderLock(); - - return retry; - } - - /// <summary> - /// Iterates and trims threads in the thread -> count map that - /// are no longer active. - /// </summary> - [SupportedOSPlatform("windows")] - public void TrimThreads() - { - const uint ExitCodeStillActive = 259; - const int ThreadQueryInformation = 0x40; - - Span<int> ids = LocalCounts.ThreadIds.AsSpan(); - - for (int i = 0; i < ids.Length; i++) - { - int id = ids[i]; - - if (id != 0) - { - IntPtr handle = OpenThread(ThreadQueryInformation, false, (uint)id); - - if (handle == IntPtr.Zero) - { - Interlocked.CompareExchange(ref ids[i], 0, id); - } - else - { - GetExitCodeThread(handle, out uint exitCode); - - if (exitCode != ExitCodeStillActive) - { - Interlocked.CompareExchange(ref ids[i], 0, id); - } - - CloseHandle(handle); - } - } - } - } - } -}
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