X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_rwlock_trywrlock.c;h=64d9d3121a70989b01cbb5a1324e131765d72a60;hb=bf14ef193b4203aa9a8b173faeeea06d98397f65;hp=1bcf7c998f3a113773b60e8c76ed8f1b8c841db7;hpb=e882756311c7b06e59fcc8e582f03852b7dcfd30;p=musl

diff --git a/src/thread/pthread_rwlock_trywrlock.c b/src/thread/pthread_rwlock_trywrlock.c
index 1bcf7c99..64d9d312 100644
--- a/src/thread/pthread_rwlock_trywrlock.c
+++ b/src/thread/pthread_rwlock_trywrlock.c
@@ -1,13 +1,9 @@
 #include "pthread_impl.h"
 
-int pthread_rwlock_trywrlock(pthread_rwlock_t *rw)
+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;
 }
+
+weak_alias(__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock);