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[HLE/Kernel] Somewhat improved sync primitives

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gdkchan 2018-04-18 23:52:23 -03:00
parent e9a96e3522
commit b9af34f3dd
20 changed files with 408 additions and 443 deletions
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91
Ryujinx.Core/OsHle/Kernel/MutualExclusion.cs Normal file
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using Ryujinx.Core.OsHle.Handles;
using System.Collections.Generic;
using System.Threading;
namespace Ryujinx.Core.OsHle.Kernel
{
class MutualExclusion
{
private const int MutexHasListenersMask = 0x40000000;
private Process Process;
private long MutexAddress;
private List<(KThread Thread, AutoResetEvent WaitEvent)> WaitingThreads;
public MutualExclusion(Process Process, long MutexAddress)
{
this.Process = Process;
this.MutexAddress = MutexAddress;
WaitingThreads = new List<(KThread, AutoResetEvent)>();
}
public void WaitForLock(KThread RequestingThread)
{
int OwnerThreadHandle = Process.Memory.ReadInt32(MutexAddress) & ~MutexHasListenersMask;
WaitForLock(RequestingThread, OwnerThreadHandle);
}
public void WaitForLock(KThread RequestingThread, int OwnerThreadHandle)
{
if (OwnerThreadHandle == RequestingThread.Handle ||
OwnerThreadHandle == 0)
{
return;
}
using (AutoResetEvent WaitEvent = new AutoResetEvent(false))
{
lock (WaitingThreads)
{
WaitingThreads.Add((RequestingThread, WaitEvent));
}
Process.Scheduler.Suspend(RequestingThread.ProcessorId);
WaitEvent.WaitOne();
Process.Scheduler.Resume(RequestingThread);
}
}
public void Unlock()
{
lock (WaitingThreads)
{
int HasListeners = WaitingThreads.Count > 1 ? MutexHasListenersMask : 0;
if (WaitingThreads.Count > 0)
{
int HighestPriority = WaitingThreads[0].Thread.Priority;
int HighestPrioIndex = 0;
for (int Index = 1; Index < WaitingThreads.Count; Index++)
{
if (HighestPriority > WaitingThreads[Index].Thread.Priority)
{
HighestPriority = WaitingThreads[Index].Thread.Priority;
HighestPrioIndex = Index;
}
}
int Handle = WaitingThreads[HighestPrioIndex].Thread.Handle;
WaitingThreads[HighestPrioIndex].WaitEvent.Set();
WaitingThreads.RemoveAt(HighestPrioIndex);
Process.Memory.WriteInt32(MutexAddress, HasListeners | Handle);
}
else
{
Process.Memory.WriteInt32(MutexAddress, 0);
}
}
}
}
}