X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_cond_broadcast.c;h=6bfab78f961f7dcd71c40da258065abc0b6bc44d;hb=acfe6d033eafe12d61ad91f496850b1bf58c6f98;hp=bf6de048c1f83a7ef708964deb42a1cc9d9c6419;hpb=729d6368bdf9faa33299cdfa68efc7422af33bd7;p=musl diff --git a/src/thread/pthread_cond_broadcast.c b/src/thread/pthread_cond_broadcast.c index bf6de048..6bfab78f 100644 --- a/src/thread/pthread_cond_broadcast.c +++ b/src/thread/pthread_cond_broadcast.c @@ -2,38 +2,9 @@ int pthread_cond_broadcast(pthread_cond_t *c) { - pthread_mutex_t *m; - + if (!c->_c_shared) return __private_cond_signal(c, -1); if (!c->_c_waiters) return 0; - a_inc(&c->_c_seq); - - /* If cond var is process-shared, simply wake all waiters. */ - if (c->_c_mutex == (void *)-1) { - __wake(&c->_c_seq, -1, 0); - return 0; - } - - /* Block waiters from returning so we can use the mutex. */ - while (a_swap(&c->_c_lock, 1)) - __wait(&c->_c_lock, &c->_c_lockwait, 1, 1); - if (!c->_c_waiters) - goto out; - m = c->_c_mutex; - - /* Move waiter count to the mutex */ - a_fetch_add(&m->_m_waiters, c->_c_waiters); - a_store(&c->_c_waiters, 0); - - /* Perform the futex requeue, waking one waiter unless we know - * that the calling thread holds the mutex. */ - __syscall(SYS_futex, &c->_c_seq, FUTEX_REQUEUE, - !m->_m_type || (m->_m_lock&INT_MAX)!=pthread_self()->tid, - INT_MAX, &m->_m_lock); - -out: - a_store(&c->_c_lock, 0); - if (c->_c_lockwait) __wake(&c->_c_lock, 1, 0); - + __wake(&c->_c_seq, -1, 0); return 0; }