IEnumerable <RawDataHolder> FetchSourceItems()
{
for (; ;)
{
if (itemsBeingProcessed.Count >= processingQueueSize)
{
yield break;
}
if (inEnumerator.MoveNext())
{
var holder = new RawDataHolder()
{
Data = inEnumerator.Current
};
itemsBeingProcessed.Enqueue(holder);
yield return(holder);
}
else
{
yield return(null);
yield break;
}
}
}
IEnumerable <RawDataHolder> FetchSourceItems()
{
for (; ;)
{
var holder = new RawDataHolder();
if (Interlocked.Increment(ref itemsBeingProcessed) > processingQueueSize)
{
Interlocked.Decrement(ref itemsBeingProcessed);
yield break;
}
if (inEnumerator.MoveNext())
{
holder.Data = inEnumerator.Current;
yield return(holder);
}
else
{
yield return(null);
yield break;
}
}
}