// Raises the PostCompleted event.
protected virtual void OnPostCompleted(PostCompletedEventArgs e)
{
EventHandler <PostCompletedEventArgs> handler = PostCompleted;
if (handler != null)
{
context.Post(delegate(object state)
{
handler(this, e);
}, null);
}
}
// Processes and invokes delegates.
private void DelegateProcedure()
{
lock (lockObject)
{
// Signal the constructor that the thread is now running.
Monitor.Pulse(lockObject);
}
// Set this DelegateQueue as the SynchronizationContext for this thread.
SynchronizationContext.SetSynchronizationContext(this);
// Placeholder for DelegateQueueAsyncResult objects.
DelegateQueueAsyncResult result = null;
// While the DelegateQueue has not been disposed.
while (true)
{
// Critical section.
lock (lockObject)
{
// If the DelegateQueue has been disposed, break out of loop; we're done.
if (disposed)
{
break;
}
// If there are delegates waiting to be invoked.
if (delegateDeque.Count > 0)
{
result = delegateDeque.PopFront();
}
// Else there are no delegates waiting to be invoked.
else
{
// Wait for next delegate.
Monitor.Wait(lockObject);
// If the DelegateQueue has been disposed, break out of loop; we're done.
if (disposed)
{
break;
}
Debug.Assert(delegateDeque.Count > 0);
result = delegateDeque.PopFront();
}
}
Debug.Assert(result != null);
// Invoke the delegate.
result.Invoke();
if (result.NotificationType == NotificationType.BeginInvokeCompleted)
{
InvokeCompletedEventArgs e = new InvokeCompletedEventArgs(
result.Method,
result.GetArgs(),
result.ReturnValue,
result.Error);
OnInvokeCompleted(e);
}
else if (result.NotificationType == NotificationType.PostCompleted)
{
object[] args = result.GetArgs();
Debug.Assert(args.Length == 1);
Debug.Assert(result.Method is SendOrPostCallback);
PostCompletedEventArgs e = new PostCompletedEventArgs(
(SendOrPostCallback)result.Method,
result.Error,
args[0]);
OnPostCompleted(e);
}
else
{
Debug.Assert(result.NotificationType == NotificationType.None);
}
}
Debug.WriteLine(delegateThread.Name + " Finished");
}
