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;  }  | 
