private object Dequeue()
{
var element = _inputBuffer[_nextInputElementCursor];
if (element == null)
{
throw new IllegalStateException("Internal queue must never contain a null");
}
_inputBuffer[_nextInputElementCursor] = null;
_batchRemaining--;
if (_batchRemaining == 0 && !_upstreamCompleted)
{
ReactiveStreamsCompliance.TryRequest(_upstream, _requestBatchSize);
_batchRemaining = _requestBatchSize;
}
_inputBufferElements--;
_nextInputElementCursor = (_nextInputElementCursor + 1) & _indexMask;
return(element);
}
public void OnSubscribe(ISubscription subscription)
{
if (subscription == null)
{
throw new ArgumentException("Subscription cannot be null");
}
if (_upstreamCompleted)
{
ReactiveStreamsCompliance.TryCancel(subscription);
}
else if (_downstreamCanceled)
{
_upstreamCompleted = true;
ReactiveStreamsCompliance.TryCancel(subscription);
}
else
{
_upstream = subscription;
// prefetch
ReactiveStreamsCompliance.TryRequest(_upstream, _inputBuffer.Length);
}
}