public void Cancel()
{
if (Status == TaskStatus.WaitingToRun || Status == TaskStatus.Running)
{
Status = TaskStatus.Canceled;
cancellation.Dispose();
}
}
IEnumerator DrainQueue(Queue <T> q, int frameCount)
{
lock (gate)
{
readyDrainEnumerator = false; // use next queue.
running = false;
}
while (!cancelationToken.IsDisposed && frameCount-- != 0)
{
yield return(null);
}
try
{
if (q != null)
{
while (q.Count > 0 && !hasError)
{
if (cancelationToken.IsDisposed)
{
break;
}
lock (gate)
{
running = true;
}
var value = q.Dequeue();
observer.OnNext(value);
lock (gate)
{
running = false;
}
}
if (q.Count == 0)
{
pool.Return(q);
}
}
if (hasError)
{
if (!cancelationToken.IsDisposed)
{
cancelationToken.Dispose();
try { observer.OnError(error); } finally { Dispose(); }
}
}
else if (calledCompleted)
{
lock (gate)
{
// not self only
if (runningEnumeratorCount != 1)
{
yield break;
}
}
if (!cancelationToken.IsDisposed)
{
cancelationToken.Dispose();
try { observer.OnCompleted(); }
finally { Dispose(); }
}
}
}
finally
{
lock (gate)
{
runningEnumeratorCount--;
}
}
}