public IAsyncResult BeginWaitForItem(TimeSpan timeout, AsyncCallback callback, object state)
{
lock (LockObject)
{
if (_QueueState == QueueState.Open)
{
if (!_ItemQueue.HasAvailableItem)
{
AsyncQueueWaiter waiter = new AsyncQueueWaiter(timeout, callback, state);
_WaiterList.Add(waiter);
return(waiter);
}
}
else if (_QueueState == QueueState.Shutdown)
{
if (!_ItemQueue.HasAvailableItem && _ItemQueue.HasAnyItem)
{
AsyncQueueWaiter waiter = new AsyncQueueWaiter(timeout, callback, state);
_WaiterList.Add(waiter);
return(waiter);
}
}
}
return(new DataCompleteAsyncResult <bool>(true, callback, state));
}
public bool EndWaitForItem(IAsyncResult result)
{
DataCompleteAsyncResult <bool> dataResult = result as DataCompleteAsyncResult <bool>;
if (dataResult != null)
{
return(DataCompleteAsyncResult <bool> .End(result));
}
return(AsyncQueueWaiter.End(result));
}
public static bool End(IAsyncResult asyncResult)
{
AsyncQueueWaiter waiterResult = ExAsyncResult.End <AsyncQueueWaiter>(asyncResult);
return(waiterResult._ItemAvailable);
}
private static void TimerCallback(object state)
{
AsyncQueueWaiter thisPtr = (AsyncQueueWaiter)state;
thisPtr.Complete(false);
}