public bool WaitForItem(TimeSpan timeout)
{
WaitQueueWaiter waiter = null;
bool itemAvailable = false;
lock (ThisLock)
{
if (queueState == QueueState.Open)
{
if (itemQueue.HasAvailableItem)
{
itemAvailable = true;
}
else
{
waiter = new WaitQueueWaiter();
waiterList.Add(waiter);
}
}
else if (queueState == QueueState.Shutdown)
{
if (itemQueue.HasAvailableItem)
{
itemAvailable = true;
}
else if (itemQueue.HasAnyItem)
{
waiter = new WaitQueueWaiter();
waiterList.Add(waiter);
}
else
{
return(true);
}
}
else
{
// queueState == QueueState.Closed
return(true);
}
}
if (waiter != null)
{
return(waiter.Wait(timeout));
}
else
{
return(itemAvailable);
}
}
public Task <bool> WaitForItemAsync(CancellationToken token)
{
WaitQueueWaiter waiter = null;
bool itemAvailable = false;
lock (ThisLock)
{
if (queueState == QueueState.Open)
{
if (itemQueue.HasAvailableItem)
{
itemAvailable = true;
}
else
{
waiter = new WaitQueueWaiter();
waiterList.Add(waiter);
}
}
else if (queueState == QueueState.Shutdown)
{
if (itemQueue.HasAvailableItem)
{
itemAvailable = true;
}
else if (itemQueue.HasAnyItem)
{
waiter = new WaitQueueWaiter();
waiterList.Add(waiter);
}
else
{
return(Task.FromResult(true));
}
}
else // queueState == QueueState.Closed
{
return(Task.FromResult(true));
}
}
if (waiter != null)
{
return(waiter.WaitAsync(token));
}
else
{
return(Task.FromResult(itemAvailable));
}
}
public bool WaitForItem(TimeSpan timeout)
{
WaitQueueWaiter <T> item = null;
bool flag = false;
lock (this.ThisLock)
{
if (this.queueState == QueueState <T> .Open)
{
if (this.itemQueue.HasAvailableItem)
{
flag = true;
}
else
{
item = new WaitQueueWaiter <T>();
this.waiterList.Add(item);
}
}
else if (this.queueState == QueueState <T> .Shutdown)
{
if (!this.itemQueue.HasAvailableItem)
{
if (!this.itemQueue.HasAnyItem)
{
return(true);
}
item = new WaitQueueWaiter <T>();
this.waiterList.Add(item);
}
else
{
flag = true;
}
}
else
{
return(true);
}
}
if (item != null)
{
return(item.Wait(timeout));
}
return(flag);
}
