int pthread_mutex_unlock(pthread_mutex_t *m)
{
pthread_t self;
+ int waiters = m->_m_waiters;
+ int cont;
if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
if (!m->_m_lock)
self->robust_list.pending = &m->_m_next;
*(void **)m->_m_prev = m->_m_next;
if (m->_m_next) ((void **)m->_m_next)[-1] = m->_m_prev;
- a_store(&m->_m_lock, 0);
+ cont = a_swap(&m->_m_lock, 0);
self->robust_list.pending = 0;
- } else {
- a_store(&m->_m_lock, 0);
+ goto wake;
}
- } else {
- a_store(&m->_m_lock, 0);
}
-
- if (m->_m_waiters) __wake(&m->_m_lock, 1, 0);
+ cont = a_swap(&m->_m_lock, 0);
+wake:
+ if (waiters || cont<0)
+ __wake(&m->_m_lock, 1, 0);
return 0;
}