internal bool WaitCore(int millisecondsTimeout, CancellationToken cancellationToken)
{
if (IsCompleted)
{
return(true);
}
// If the task is ready to be run and we were supposed to wait on it indefinitely without cancellation, just run it
if (Status == TaskStatus.WaitingToRun && millisecondsTimeout == Timeout.Infinite && scheduler != null && !cancellationToken.CanBeCanceled)
{
scheduler.RunInline(this, true);
}
bool result = true;
if (!IsCompleted)
{
var continuation = new ManualResetContinuation();
try
{
ContinueWith(continuation);
result = continuation.Wait(millisecondsTimeout, cancellationToken);
}
finally
{
if (!result)
{
RemoveContinuation(continuation);
}
continuation.Dispose();
}
}
return(result);
}
public static int WaitAny(Task[] tasks, int millisecondsTimeout, CancellationToken cancellationToken)
{
if (tasks == null)
{
throw new ArgumentNullException("tasks");
}
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("millisecondsTimeout");
}
CheckForNullTasks(tasks);
if (tasks.Length > 0)
{
var continuation = new ManualResetContinuation();
bool result = false;
try
{
for (int i = 0; i < tasks.Length; i++)
{
var t = tasks[i];
if (t.IsCompleted)
{
return(i);
}
t.ContinueWith(continuation);
}
result = continuation.Wait(millisecondsTimeout, cancellationToken);
if (!result)
{
return(-1);
}
}
finally
{
if (!result)
{
foreach (var t in tasks)
{
t.RemoveContinuation(continuation);
}
}
continuation.Dispose();
}
}
int firstFinished = -1;
for (int i = 0; i < tasks.Length; i++)
{
var t = tasks[i];
if (t.IsCompleted)
{
firstFinished = i;
break;
}
}
return(firstFinished);
}
