/// <summary>
/// Thread method
/// </summary>
private void Start()
{
var curTid = OSApi.GetCurrentThreadId();
var processThread = Process.GetCurrentProcess().Threads
.OfType <ProcessThread>()
.First(pt => pt.Id == curTid);
processThread.IdealProcessor = _processorId;
processThread.ProcessorAffinity = (IntPtr)(1 << _processorId);
var token = _cancellationTokenSource.Token;
var spinWait = new SpinWait();
var starvation = Stopwatch.StartNew();
while (!token.IsCancellationRequested)
{
if (TasksSource.TryDequeue(out var task))
{
task.Action(task.State);
starvation.Restart();
continue;
}
if (starvation.ElapsedMilliseconds > 300)
{
// If I have no work and exported to another context,
// return me back to home context. Next iteration will loop
// on home context's queue
if (Exported)
{
_exportRegistration.Dispose();
_exportRegistration = null;
continue;
}
// If I have no work, I can ask for work in another context
// If another context in my host have any work, let's take
// it's queue and join
if (_host.TryNotifyIdle(this, out var registration))
{
_exportRegistration = registration;
}
else
{
// else, go to blocking state
_hasJobEvent.Reset();
_hasJobEvent.WaitOne();
starvation.Restart();
}
}
spinWait.SpinOnce();
}
}
/// <summary>
/// SyncContext thread function
/// </summary>
private void Start(object obj)
{
SetSynchronizationContext(this);
var tinfo = (LocalThreadState)obj;
var curTid = OSApi.GetCurrentThreadId();
var processThread = Process.GetCurrentProcess().Threads.OfType <ProcessThread>().First(pt => pt.Id == curTid);
processThread.IdealProcessor = tinfo.ProcessorId;
processThread.ProcessorAffinity = (IntPtr)(1 << tinfo.ProcessorId);
tinfo.ProcessThread = processThread;
var token = tinfo.CancellationTokenSource.Token;
var spinWait = new SpinWait();
var starvation = Stopwatch.StartNew();
var invertingStarvation = Stopwatch.StartNew();
while (!token.IsCancellationRequested)
{
if (_tasks.TryDequeue(out var task))
{
task.Action(task.State);
starvation.Restart();
}
else
{
if (starvation.ElapsedMilliseconds > 300)
{
Interlocked.Exchange(ref _hardLock, 1);
_event.WaitOne();
starvation.Restart();
continue;
}
spinWait.SpinOnce();
}
if (invertingStarvation.ElapsedMilliseconds > 5000)
{
invertingStarvation.Restart();
Invert(tinfo);
}
}
}