X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fsem_post.c;h=31e3293d20504a85deaebca70ded98567ba9561e;hb=1ef37aa00ea830dfda76e04e3d941cafa74d8b76;hp=148ab780e8f94d04ac2a0e222ff1f8631096708a;hpb=88c4e720317845a8e01aee03f142ba82674cd23d;p=musl

diff --git a/src/thread/sem_post.c b/src/thread/sem_post.c
index 148ab780..31e3293d 100644
--- a/src/thread/sem_post.c
+++ b/src/thread/sem_post.c
@@ -3,11 +3,15 @@
 
 int sem_post(sem_t *sem)
 {
-	int val, waiters;
+	int val, waiters, priv = sem->__val[2];
 	do {
 		val = sem->__val[0];
 		waiters = sem->__val[1];
+		if (val == SEM_VALUE_MAX) {
+			errno = EOVERFLOW;
+			return -1;
+		}
 	} while (a_cas(sem->__val, val, val+1+(val<0)) != val);
-	if (val<0 || waiters) __wake(sem->__val, 1, 0);
+	if (val<0 || waiters) __wake(sem->__val, 1, priv);
 	return 0;
 }