internal ILoopResult ForEach(IEnumerable <T> source, int maxDegreeOfParallelism)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
_maxDegreeOfParallelism = OptimizeMaxDegreeOfParallelism(source, maxDegreeOfParallelism);
var iterator = source.GetEnumerator();
if (!iterator.MoveNext())
{
return(this);
}
if (_maxDegreeOfParallelism == 1)
{
Process(iterator);
return(this);
}
// avoid running out of memory.
var capacity = Math.Min(512, _maxDegreeOfParallelism);
_itemQueue = new LinkedBlockingQueue <KeyValuePair <long, T> >(capacity);
_futures = new List <IFuture <Void> >(capacity);
try
{
Submit(StartParallel);
}
catch (RejectedExecutionException)
{
Process(iterator);
return(this);
}
bool success;
long count = 0;
do
{
success = _itemQueue.TryPut(new KeyValuePair <long, T>(count++, iterator.Current));
}while (success && iterator.MoveNext());
_itemQueue.Break();
WaitForAllTaskToComplete();
return(this);
}