fix regression that made shared libs crash on arm

[musl] / src / thread / sem_timedwait.c

diff --git a/src/thread/sem_timedwait.c b/src/thread/sem_timedwait.c
index 4e12389..6d0d011 100644 (file)
--- a/src/thread/sem_timedwait.c
+++ b/src/thread/sem_timedwait.c
@@ -6,13 +6,14 @@ static void cleanup(void *p)
        a_dec(p);
 }
 
-int sem_timedwait(sem_t *sem, const struct timespec *at)
+int sem_timedwait(sem_t *restrict sem, const struct timespec *restrict at)
 {
        while (sem_trywait(sem)) {
                int r;
                a_inc(sem->__val+1);
                a_cas(sem->__val, 0, -1);
                r = __timedwait(sem->__val, -1, CLOCK_REALTIME, at, cleanup, sem->__val+1, 0);
+               a_dec(sem->__val+1);
                if (r) {
                        errno = r;
                        return -1;