fix logic for when wakeup is not desired on cond bcast

[musl] / src / thread / pthread_cond_broadcast.c

diff --git a/src/thread/pthread_cond_broadcast.c b/src/thread/pthread_cond_broadcast.c
index 3daa781..7e5ea91 100644 (file)
--- a/src/thread/pthread_cond_broadcast.c
+++ b/src/thread/pthread_cond_broadcast.c
@@ -37,10 +37,11 @@ int pthread_cond_broadcast(pthread_cond_t *c)
                a_fetch_add(&m->_m_waiters, -w);
        }
 
-       /* Perform the futex requeue, waking one waiter if and only if
-        * the calling thread does not hold the mutex. */
+       /* Perform the futex requeue, waking one waiter unless we know
+        * that the calling thread holds the mutex. */
        __syscall(SYS_futex, &c->_c_block, FUTEX_REQUEUE,
-               m->_m_lock!=pthread_self()->tid, INT_MAX, &m->_m_lock);
+               !m->_m_type || (m->_m_lock&INT_MAX)!=pthread_self()->tid,
+               INT_MAX, &m->_m_lock);
 
        unlock(c);
        return 0;