internal JoinSubscription(ISubscriber <T> actual, int n, int prefetch)
{
this.actual = actual;
var a = new JoinInnerSubscriber[n];
for (int i = 0; i < n; i++)
{
a[i] = new JoinInnerSubscriber(this, prefetch);
}
this.subscribers = a;
Volatile.Write(ref done, n);
}
internal void InnerNext(JoinInnerSubscriber inner, T value)
{
if (QueueDrainHelper.TryEnter(ref wip))
{
long r = Volatile.Read(ref requested);
if (r != 0L)
{
actual.OnNext(value);
if (r != long.MaxValue)
{
Interlocked.Decrement(ref requested);
}
inner.RequestOne();
}
else
{
var q = inner.Queue();
if (!q.Offer(value))
{
InnerError(BackpressureHelper.MissingBackpressureException("Queue full?!"));
return;
}
}
if (QueueDrainHelper.Leave(ref wip, 1) == 0)
{
return;
}
}
else
{
var q = inner.Queue();
if (!q.Offer(value))
{
InnerError(BackpressureHelper.MissingBackpressureException("Queue full?!"));
return;
}
if (!QueueDrainHelper.Enter(ref wip))
{
return;
}
}
DrainLoop();
}