/// <summary>
/// Removes and signals all waiting threads, invokes done(), and
/// nulls out callable.
/// </summary>
private void FinishCompletion()
{
// assert state > COMPLETING;
for (WaitNode q; (q = Waiters) != null;)
{
if (UNSAFE.compareAndSwapObject(this, WaitersOffset, q, null))
{
for (;;)
{
Thread t = q.thread;
if (t != null)
{
q.thread = null;
LockSupport.Unpark(t);
}
WaitNode next = q.next;
if (next == null)
{
break;
}
q.next = null; // unlink to help gc
q = next;
}
break;
}
}
Done();
Callable = null; // to reduce footprint
}