sem_timedwait
int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict);
FB10_COMPAT(_libc_sem_timedwait_compat, sem_timedwait);
__weak_reference(_sem_timedwait, sem_timedwait);
FB10_COMPAT(_sem_timedwait_compat, sem_timedwait);
ret = sem_timedwait(&sem, &to);