private void ContinueEnumerator(bool outsideOfSyncContext)
{
if (_syncContext != null && outsideOfSyncContext)
{
_syncContext.Post(SyncContextContinueEnumerator, this);
return;
}
Exception caughtException = null;
lock (_enumeratorLock)
{
bool stillGoing = false;
try
{
while ((stillGoing = _enumerator.MoveNext()))
{
if (HasBeenCancelled())
{
continue;
}
int expectedResultCount = _enumerator.Current;
if (expectedResultCount == 0)
{
ThreadPool.QueueUserWorkItem(ThreadPoolContinueEnumerator, this);
return;
}
_waitCount.WriteLock(x => expectedResultCount);
return;
}
}
catch (Exception ex)
{
caughtException = ex;
throw;
}
finally
{
if (!stillGoing)
{
_enumerator.Dispose();
if (caughtException != null)
{
_asyncResult.SetAsCompleted(caughtException);
}
else
{
_asyncResult.SetAsCompleted();
}
}
}
}
}
public IAsyncResult Result()
{
return(_resultQueue.WriteLock(x => x.Dequeue()));
}