ryujinx/Ryujinx.HLE/HOS/Kernel/KSynchronization.cs

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using System.Collections.Generic;
using static Ryujinx.HLE.HOS.ErrorCode;
namespace Ryujinx.HLE.HOS.Kernel
{
class KSynchronization
{
private Horizon System;
public KSynchronization(Horizon System)
{
this.System = System;
}
public long WaitFor(KSynchronizationObject[] SyncObjs, long Timeout, ref int HndIndex)
{
long Result = MakeError(ErrorModule.Kernel, KernelErr.Timeout);
System.CriticalSectionLock.Lock();
//Check if objects are already signaled before waiting.
for (int Index = 0; Index < SyncObjs.Length; Index++)
{
if (!SyncObjs[Index].IsSignaled())
{
continue;
}
HndIndex = Index;
System.CriticalSectionLock.Unlock();
return 0;
}
if (Timeout == 0)
{
System.CriticalSectionLock.Unlock();
return Result;
}
KThread CurrentThread = System.Scheduler.GetCurrentThread();
if (CurrentThread.ShallBeTerminated ||
CurrentThread.SchedFlags == ThreadSchedState.TerminationPending)
{
Result = MakeError(ErrorModule.Kernel, KernelErr.ThreadTerminating);
}
else if (CurrentThread.SyncCancelled)
{
CurrentThread.SyncCancelled = false;
Result = MakeError(ErrorModule.Kernel, KernelErr.Cancelled);
}
else
{
LinkedListNode<KThread>[] SyncNodes = new LinkedListNode<KThread>[SyncObjs.Length];
for (int Index = 0; Index < SyncObjs.Length; Index++)
{
SyncNodes[Index] = SyncObjs[Index].AddWaitingThread(CurrentThread);
}
CurrentThread.WaitingSync = true;
CurrentThread.SignaledObj = null;
CurrentThread.ObjSyncResult = (int)Result;
CurrentThread.Reschedule(ThreadSchedState.Paused);
if (Timeout > 0)
{
System.TimeManager.ScheduleFutureInvocation(CurrentThread, Timeout);
}
System.CriticalSectionLock.Unlock();
CurrentThread.WaitingSync = false;
if (Timeout > 0)
{
System.TimeManager.UnscheduleFutureInvocation(CurrentThread);
}
System.CriticalSectionLock.Lock();
Result = (uint)CurrentThread.ObjSyncResult;
HndIndex = -1;
for (int Index = 0; Index < SyncObjs.Length; Index++)
{
SyncObjs[Index].RemoveWaitingThread(SyncNodes[Index]);
if (SyncObjs[Index] == CurrentThread.SignaledObj)
{
HndIndex = Index;
}
}
}
System.CriticalSectionLock.Unlock();
return Result;
}
public void SignalObject(KSynchronizationObject SyncObj)
{
System.CriticalSectionLock.Lock();
if (SyncObj.IsSignaled())
{
LinkedListNode<KThread> Node = SyncObj.WaitingThreads.First;
while (Node != null)
{
KThread Thread = Node.Value;
if ((Thread.SchedFlags & ThreadSchedState.LowNibbleMask) == ThreadSchedState.Paused)
{
Thread.SignaledObj = SyncObj;
Thread.ObjSyncResult = 0;
Thread.Reschedule(ThreadSchedState.Running);
}
Node = Node.Next;
}
}
System.CriticalSectionLock.Unlock();
}
}
}