/// <summary>
/// Removes the thread from our dictionary and asynchronously
/// signals it to shut down.
/// </summary>
/// <param name="dispatcher">
/// The dispatcher associated with the worker thread.
/// </param>
private static void DestroyWorkerThread(Dispatcher dispatcher)
{
Debug.Assert(_poolThreads.ContainsKey(dispatcher));
Debug.Assert(_poolThreads[dispatcher].Item2 == 0);
_poolThreads.Remove(dispatcher);
// Exit our thread politely. This is asynchronous, so the
// worker will exit eventually.
dispatcher.BeginInvokeShutdown(DispatcherPriority.Normal);
}
private static void ShutdownDispatcher(Dispatcher dispatcher, Countdown countdown)
{
EventHandler handler = null;
if ((dispatcher != null) && !dispatcher.HasShutdownFinished)
{
countdown.Increment();
try
{
if (handler == null)
{
handler = (sender, e) => countdown.Decrement();
}
dispatcher.ShutdownFinished += handler;
if (dispatcher.HasShutdownFinished)
{
countdown.Decrement();
}
else
{
dispatcher.BeginInvokeShutdown(DispatcherPriority.Send);
}
}
catch
{
countdown.Decrement();
}
}
}
