void InnerNext(InnerSubscriber inner, T item)
{
if (Volatile.Read(ref wip) == 0 && Interlocked.CompareExchange(ref wip, 1, 0) == 0)
{
long r = Volatile.Read(ref requested);
long e = emitted;
if (e != r)
{
actual.OnNext(item);
emitted = e + 1;
inner.Produced(limit);
}
else
{
var q = inner.GetOrCreateQueue(limit);
q.Offer(item);
}
int w = Interlocked.Decrement(ref wip);
if (w == 0)
{
return;
}
DrainLoop(w);
}
else
{
var q = inner.GetOrCreateQueue(limit);
q.Offer(item);
if (Interlocked.Increment(ref wip) != 1)
{
return;
}
DrainLoop(1);
}
}
void InnerNext(InnerSubscriber inner, R item)
{
if (Volatile.Read(ref wip) == 0 && Interlocked.CompareExchange(ref wip, 1, 0) == 0)
{
var q = Volatile.Read(ref inner.queue);
bool offer = true;
if (current == inner)
{
if (q == null || q.IsEmpty())
{
var e = emitted;
if (e != Volatile.Read(ref requested))
{
actual.OnNext(item);
emitted = e + 1;
inner.RequestOne();
offer = false;
}
}
}
if (offer)
{
if (q == null)
{
q = inner.GetOrCreateQueue();
}
q.Offer(item);
}
if (Interlocked.Decrement(ref wip) == 0)
{
return;
}
}
else
{
var q = inner.GetOrCreateQueue();
q.Offer(item);
if (Interlocked.Increment(ref wip) != 1)
{
return;
}
}
DrainLoop();
}
