aboutsummaryrefslogtreecommitdiff
path: root/Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs
diff options
context:
space:
mode:
authorTSR Berry <20988865+TSRBerry@users.noreply.github.com>2023-04-08 01:22:00 +0200
committerMary <thog@protonmail.com>2023-04-27 23:51:14 +0200
commitcee712105850ac3385cd0091a923438167433f9f (patch)
tree4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs
parentcd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff)
Move solution and projects to src
Diffstat (limited to 'Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs')
-rw-r--r--Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapState.cs163
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);
- }
- }
- }
- }
- }
-} \ No newline at end of file