if (oldstate == WAITING) goto done;
+ if (!node.next && !(m->_m_type & 8))
+ a_inc(&m->_m_waiters);
+
/* Unlock the barrier that's holding back the next waiter, and
* either wake it or requeue it to the mutex. */
if (node.prev) {
int val = m->_m_lock;
if (val>0) a_cas(&m->_m_lock, val, val|0x80000000);
unlock_requeue(&node.prev->barrier, &m->_m_lock, m->_m_type & (8|128));
+ } else if (!(m->_m_type & 8)) {
+ a_dec(&m->_m_waiters);
}
/* Since a signal was consumed, cancellation is not permitted. */