fix stale locks left behind when pthread_create fails

[musl] / src / thread / pthread_mutex_lock.c

diff --git a/src/thread/pthread_mutex_lock.c b/src/thread/pthread_mutex_lock.c
index 15ede3f..42b5af6 100644 (file)
--- a/src/thread/pthread_mutex_lock.c
+++ b/src/thread/pthread_mutex_lock.c
@@ -2,8 +2,8 @@
 
 int pthread_mutex_lock(pthread_mutex_t *m)
 {
-       int r;
-       while ((r=pthread_mutex_trylock(m)) == EBUSY)
-               __wait(&m->_m_lock, &m->_m_waiters, 1, 0);
-       return r;
+       if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_cas(&m->_m_lock, 0, EBUSY))
+               return 0;
+
+       return pthread_mutex_timedlock(m, 0);
 }