fix sem_timedwait bug introduced in timedwait unification

this dec used to be performed by the cancellation handler, which was
called when popped.

diff --git a/src/thread/sem_timedwait.c b/src/thread/sem_timedwait.c
index 4e12389..64b4342 100644 (file)
--- a/src/thread/sem_timedwait.c
+++ b/src/thread/sem_timedwait.c
@@ -13,6 +13,7 @@ int sem_timedwait(sem_t *sem, const struct timespec *at)
                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;