diff options
| -rw-r--r-- | src/thread/pthread_cond_timedwait.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/src/thread/pthread_cond_timedwait.c b/src/thread/pthread_cond_timedwait.c index d1501240..f5f37af1 100644 --- a/src/thread/pthread_cond_timedwait.c +++ b/src/thread/pthread_cond_timedwait.c @@ -146,14 +146,13 @@ relock: if (oldstate == WAITING) goto done; - if (!node.next) 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) - unlock_requeue(&node.prev->barrier, &m->_m_lock, m->_m_type & 128); - else - a_dec(&m->_m_waiters); + 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)); + } /* Since a signal was consumed, cancellation is not permitted. */ if (e == ECANCELED) e = 0; |