X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_mutex_trylock.c;h=50a815a5fbf4dc22322347fa2ab4aaaeb98348b2;hb=729cb49f52c825ac44f437e1ff0865d9f0b3626a;hp=232e172b6e0f5fcd1ee1b9d10df3e1694317f6e5;hpb=aa398f56fa398f2202b04e82c67f822f3233786f;p=musl

diff --git a/src/thread/pthread_mutex_trylock.c b/src/thread/pthread_mutex_trylock.c
index 232e172b..50a815a5 100644
--- a/src/thread/pthread_mutex_trylock.c
+++ b/src/thread/pthread_mutex_trylock.c
@@ -7,7 +7,7 @@ int pthread_mutex_trylock(pthread_mutex_t *m)
 	pthread_t self;
 
 	if (m->_m_type == PTHREAD_MUTEX_NORMAL)
-		return (m->_m_lock || a_swap(&m->_m_lock, 1)) ? EBUSY : 0;
+		return -a_swap(&m->_m_lock, 1) & EBUSY;
 
 	self = pthread_self();
 	tid = self->tid | 0x80000000;