GetCount() [1/2]

static long System.Collections.Concurrent.ConcurrentQueue< T >.GetCount ( ConcurrentQueueSegment< T > head, int headHead, ConcurrentQueueSegment< T > tail, int tailTail )

inlinestaticprivateinherited

Definition at line 182 of file ConcurrentQueue.cs.

    {
        long num = 0L;
        int num2 = ((head == tail) ? tailTail : Volatile.Read(ref head._headAndTail.Tail)) - head.FreezeOffset;
        if (headHead < num2)
        {
            headHead &= head._slotsMask;
            num2 &= head._slotsMask;
            num += ((headHead < num2) ? (num2 - headHead) : (head._slots.Length - headHead + num2));
        }
        if (head != tail)
        {
            for (ConcurrentQueueSegment<T> nextSegment = head._nextSegment; nextSegment != tail; nextSegment = nextSegment._nextSegment)
            {
                num += nextSegment._headAndTail.Tail - nextSegment.FreezeOffset;
            }
            num += tailTail - tail.FreezeOffset;
        }
        return num;
    }

References System.L, and System.Threading.Volatile.Read().