X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_rwlock_trywrlock.c;h=bb3d3a992d1f3dd8a4919de9945b7fad75786a6a;hb=be48e22b424b6f858da0151a0b3b68bdb96b41ca;hp=1bcf7c998f3a113773b60e8c76ed8f1b8c841db7;hpb=e882756311c7b06e59fcc8e582f03852b7dcfd30;p=musl

diff --git a/src/thread/pthread_rwlock_trywrlock.c b/src/thread/pthread_rwlock_trywrlock.c
index 1bcf7c99..bb3d3a99 100644
--- a/src/thread/pthread_rwlock_trywrlock.c
+++ b/src/thread/pthread_rwlock_trywrlock.c
@@ -2,12 +2,6 @@
 
 int pthread_rwlock_trywrlock(pthread_rwlock_t *rw)
 {
-	if (a_xchg(&rw->_rw_wrlock, 1))
-		return EAGAIN;
-	if (rw->_rw_readers) {
-		a_store(&rw->_rw_wrlock, 0);
-		return EAGAIN;
-	}
-	rw->_rw_owner = pthread_self()->tid;
+	if (a_cas(&rw->_rw_lock, 0, 0x7fffffff)) return EBUSY;
 	return 0;
 }