X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_spin_trylock.c;fp=src%2Fthread%2Fpthread_spin_trylock.c;h=c12696b3010b332706d203faa7e16cad62433bca;hb=4106cdcd2de34bf3b9839e042344d92eae887ecb;hp=1fc5f73c174ec890da1457bb8bd776f9e1fb3bc2;hpb=4cc78719dd22a685ddd89b92ac3bfc308c4c19b3;p=musl

diff --git a/src/thread/pthread_spin_trylock.c b/src/thread/pthread_spin_trylock.c
index 1fc5f73c..c12696b3 100644
--- a/src/thread/pthread_spin_trylock.c
+++ b/src/thread/pthread_spin_trylock.c
@@ -2,6 +2,5 @@
 
 int pthread_spin_trylock(pthread_spinlock_t *s)
 {
-	if (*s || a_xchg(s, 1)) return EBUSY;
-	return 0;
+	return -a_xchg(s, 1) & EBUSY;
 }