/// <summary>
/// Unlinks the given node from producer queue. Symmetric to
/// <see cref="UnlinkCancelledConsumer"/>.
/// </summary>
private void UnlinkCancelledProducer(Node node)
{
if (_waitingProducers.ShouldUnlink(node))
{
using (_qlock.Lock())
{
if (_waitingProducers.ShouldUnlink(node))
{
_waitingProducers.Unlink(node);
}
}
}
}
/// <summary>
/// Unlinks the given node from consumer queue. Called by cancelled
/// (timeout, interrupt) waiters to avoid garbage retention in the
/// absence of producers.
/// </summary>
private void UnlinkCancelledConsumer(Node node)
{
// Use a form of double-check to avoid unnecessary locking and
// traversal. The first check outside lock might
// conservatively report true.
if (_waitingConsumers.ShouldUnlink(node))
{
using (_qlock.Lock())
{
if (_waitingConsumers.ShouldUnlink(node))
{
_waitingConsumers.Unlink(node);
}
}
}
}