//
// Tries to wakeup a waiting writer.
//
// NOTE: This method is called with the spinlock held
// and when the r/w lock is in the NonEntered state.
// If a waiter is woken, the method releases the spin lock
// and returns true; otherwise, the method returns false and
// with the spinlock held.
//
private bool TryWakeupWriter()
{
while (!wrQueue.IsEmpty)
{
WaitNode w = wrQueue.Dequeue();
if (w.TryLock())
{
//
// Become the waiter the next owner of the write lock,
// release the spinlock, unpark the waiter and return true.
//
writer = w.tid;
slock.Exit();
w.Unpark(StParkStatus.Success);
return(true);
}
}
//
// No writer can be released; so, return false with the
// spinlock held.
//
return(false);
}
//
// Unparks all the wait nodes in the queue.
//
internal void UnparkAll()
{
WaitNode <Q> p = head;
while (p != null)
{
p.Unpark(StParkStatus.Success);
p = p.next;
}
}
