public bool MoveNext()
{
if (SubscriptionHelper.IsCancelled(ref upstream))
{
return(false);
}
if (Volatile.Read(ref wip) == 0)
{
Monitor.Enter(this);
try
{
for (;;)
{
if (SubscriptionHelper.IsCancelled(ref upstream))
{
return(false);
}
if (Volatile.Read(ref wip) != 0)
{
break;
}
Monitor.Wait(this);
}
}
finally
{
Monitor.Exit(this);
}
}
if (queue.Poll(out current))
{
int c = consumed + 1;
if (c == limit)
{
consumed = 0;
upstream.Request(c);
}
else
{
consumed = c;
}
Interlocked.Decrement(ref wip);
return(true);
}
var ex = error;
if (ex != null)
{
throw ex;
}
return(false);
}
public bool Poll(out T item)
{
return(queue.Poll(out item));
}
