Ryujinx-git/Ryujinx/OsHle/CondVar.cs

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2018-02-04 23:08:20 +00:00
using ChocolArm64.Memory;
using System.Collections.Concurrent;
using System.Threading;
namespace Ryujinx.OsHle
{
class CondVar
{
private AMemory Memory;
private long CondVarAddress;
private long Timeout;
private class WaitingThread
{
public int Handle;
public ManualResetEvent Event;
public WaitingThread(int Handle, ManualResetEvent Event)
{
this.Handle = Handle;
this.Event = Event;
}
}
private ConcurrentQueue<WaitingThread> WaitingThreads;
public CondVar(AMemory Memory, long CondVarAddress, long Timeout)
{
this.Memory = Memory;
this.CondVarAddress = CondVarAddress;
this.Timeout = Timeout;
WaitingThreads = new ConcurrentQueue<WaitingThread>();
}
public void WaitForSignal(int ThreadHandle)
{
int Count = Memory.ReadInt32(CondVarAddress);
if (Count <= 0)
{
return;
}
Memory.WriteInt32(CondVarAddress, Count - 1);
ManualResetEvent Event = new ManualResetEvent(false);
WaitingThreads.Enqueue(new WaitingThread(ThreadHandle, Event));
if (Timeout != -1)
{
Event.WaitOne((int)(Timeout / 1000000));
}
else
{
Event.WaitOne();
}
}
public void SetSignal(int Count)
{
if (Count == -1)
{
while (WaitingThreads.TryDequeue(out WaitingThread Thread))
{
Thread.Event.Set();
}
Memory.WriteInt32(CondVarAddress, WaitingThreads.Count);
}
else
{
//TODO: Threads with the highest priority needs to be signaled first.
if (WaitingThreads.TryDequeue(out WaitingThread Thread))
{
Thread.Event.Set();
}
Memory.WriteInt32(CondVarAddress, Count);
}
}
}
}