private static bool WaitForPriority(DispatcherPriority priority)
{
const int defaultTimeout = 30000;
// Schedule the ExitFrame operation to end the nested pump after the timeout trigger happens
TimeoutFrame frame = new TimeoutFrame();
FrameTimer timeoutTimer = new FrameTimer(frame, defaultTimeout,
TimeoutFrameOperationInstance, DispatcherPriority.Send);
timeoutTimer.Start();
// exit after a priortity has been processed
DispatcherOperation opExit = Dispatcher.CurrentDispatcher.BeginInvoke(priority,
ExitFrameOperationInstance, frame);
// Pump the dispatcher
Dispatcher.PushFrame(frame);
// abort the operations that did not get processed
if (opExit.Status != DispatcherOperationStatus.Completed)
{
opExit.Abort();
}
if (!timeoutTimer.IsCompleted)
{
timeoutTimer.Stop();
}
return(!frame.TimedOut);
}
private static object TimeoutFrameOperation(object obj)
{
TimeoutFrame frame = obj as TimeoutFrame;
frame.Continue = false;
frame.TimedOut = true;
return(null);
}
public TimeoutFrameTick(TimeoutFrame parent, ulong timerId)
{
this.parent = parent;
this.timerId = timerId;
}
