public bool Dequeue(TimeSpan timeout, out T value)
{
WaitQueueReader <T> reader = null;
ExItem <T> item = new ExItem <T>();
lock (LockObject)
{
if (_QueueState == QueueState.Open)
{
if (_ItemQueue.HasAvailableItem)
{
item = _ItemQueue.DequeueAvailableItem();
}
else
{
reader = new WaitQueueReader <T>(this);
_QueueReader.Enqueue(reader);
}
}
else if (_QueueState == QueueState.Shutdown)
{
if (_ItemQueue.HasAvailableItem)
{
item = _ItemQueue.DequeueAvailableItem();
}
else if (_ItemQueue.HasAnyItem)
{
reader = new WaitQueueReader <T>(this);
_QueueReader.Enqueue(reader);
}
else
{
value = default(T);
return(true);
}
}
else
{
value = default(T);
return(true);
}
}
if (reader != null)
{
return(reader.Wait(timeout, out value));
}
else
{
invokeDequeueCallback(item.Callback);
value = item.GetData();
return(true);
}
}
public IAsyncResult BeginDequeue(TimeSpan timeout, AsyncCallback callback, object state)
{
ExItem <T> item = default(ExItem <T>);
lock (LockObject)
{
if (_QueueState == QueueState.Open)
{
if (_ItemQueue.HasAvailableItem)
{
item = _ItemQueue.DequeueAvailableItem();
}
else
{
AsyncQueueReader <T> reader = new AsyncQueueReader <T>(this, timeout, callback, state);
_QueueReader.Enqueue(reader);
return(reader);
}
}
else if (_QueueState == QueueState.Shutdown)
{
if (_ItemQueue.HasAvailableItem)
{
item = _ItemQueue.DequeueAvailableItem();
}
else if (_ItemQueue.HasAnyItem)
{
AsyncQueueReader <T> reader = new AsyncQueueReader <T>(this, timeout, callback, state);
_QueueReader.Enqueue(reader);
return(reader);
}
}
}
invokeDequeueCallback(item.Callback);
return(new DataCompleteAsyncResult <T>(item.GetData(), callback, state));
}
