TryPopCore() [2/2]

int System.Collections.Concurrent.ConcurrentStack< T >.TryPopCore ( int count, out Node poppedHead )

inlineprivate

Definition at line 246 of file ConcurrentStack.cs.

    {
        SpinWait spinWait = default(SpinWait);
        int num = 1;
        Node head;
        int i;
        while (true)
        {
            head = _head;
            if (head == null)
            {
                if (count == 1 && CDSCollectionETWBCLProvider.Log.IsEnabled())
                {
                    CDSCollectionETWBCLProvider.Log.ConcurrentStack_FastPopFailed(spinWait.Count);
                }
                poppedHead = null;
                return 0;
            }
            Node node = head;
            for (i = 1; i < count; i++)
            {
                if (node._next == null)
                {
                    break;
                }
                node = node._next;
            }
            if (Interlocked.CompareExchange(ref _head, node._next, head) == head)
            {
                break;
            }
            for (int j = 0; j < num; j++)
            {
                spinWait.SpinOnce(-1);
            }
            num = ((!spinWait.NextSpinWillYield) ? (num * 2) : Random.Shared.Next(1, 8));
        }
        if (count == 1 && CDSCollectionETWBCLProvider.Log.IsEnabled())
        {
            CDSCollectionETWBCLProvider.Log.ConcurrentStack_FastPopFailed(spinWait.Count);
        }
        poppedHead = head;
        return i;
    }

References System.Collections.Concurrent.ConcurrentStack< T >._head, System.Threading.Interlocked.CompareExchange(), System.count, System.Collections.Generic.Dictionary< TKey, TValue >.Count, System.Collections.Concurrent.CDSCollectionETWBCLProvider.Log, and System.Random.Shared.