diff options
Diffstat (limited to 'src/thread/pthread_cond_broadcast.c')
-rw-r--r-- | src/thread/pthread_cond_broadcast.c | 39 |
1 files changed, 4 insertions, 35 deletions
diff --git a/src/thread/pthread_cond_broadcast.c b/src/thread/pthread_cond_broadcast.c index 18e778f3..69f840fb 100644 --- a/src/thread/pthread_cond_broadcast.c +++ b/src/thread/pthread_cond_broadcast.c @@ -1,43 +1,12 @@ #include "pthread_impl.h" +int __private_cond_signal(pthread_cond_t *, int); + 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_waiters2); - c->_c_waiters2 = 0; - - /* Perform the futex requeue, waking one waiter unless we know - * that the calling thread holds the mutex. */ - int wake_cnt = !(m->_m_type & 3) - || (m->_m_lock&INT_MAX)!=__pthread_self()->tid; - if (m->_m_type & 128) wake_cnt = INT_MAX; - __syscall(SYS_futex, &c->_c_seq, FUTEX_REQUEUE | 128, - wake_cnt, INT_MAX, &m->_m_lock) != -EINVAL || - __syscall(SYS_futex, &c->_c_seq, FUTEX_REQUEUE, - wake_cnt, INT_MAX, &m->_m_lock); - -out: - a_store(&c->_c_lock, 0); - if (c->_c_lockwait) __wake(&c->_c_lock, 1, 1); - + __wake(&c->_c_seq, -1, 0); return 0; } |