X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_spin_lock.c;h=ded2b653c4751db88f288af6b84f92a7341263b3;hb=4554f155dd23a65fcdfd39f1d5af8af55ba37694;hp=59fa6ea89ad2e322f0071724c7ab09275a4a3258;hpb=117581ca69ec2a9c341390eed353646b47a512df;p=musl

diff --git a/src/thread/pthread_spin_lock.c b/src/thread/pthread_spin_lock.c
index 59fa6ea8..ded2b653 100644
--- a/src/thread/pthread_spin_lock.c
+++ b/src/thread/pthread_spin_lock.c
@@ -1,7 +1,8 @@
 #include "pthread_impl.h"
+#include <errno.h>
 
 int pthread_spin_lock(pthread_spinlock_t *s)
 {
-	while (a_xchg(s, 1));
+	while (*(volatile int *)s || a_cas(s, 0, EBUSY)) a_spin();
 	return 0;
 }