2 #include "pthread_impl.h"
4 int sem_timedwait(sem_t *sem, const struct timespec *at)
9 if (a_fetch_add(sem->__val, -1) > 0) return 0;
10 val = a_fetch_add(sem->__val, 1)+1;
12 if (val <= 0 && __timedwait(sem->__val, val, CLOCK_REALTIME, at, 0) == ETIMEDOUT) {