ts.tv_sec++
			ts.tv_nsec -= 1e9
		}

		if r, err := sem_timedwait((*semt)(unsafe.Pointer(mp.waitsema)), &ts); r != 0 {
			if err == _ETIMEDOUT || err == _EAGAIN || err == _EINTR {
				return -1
			}
			println("sem_timedwait err ", err, " ts.tv_sec ", ts.tv_sec, " ts.tv_nsec ", ts.tv_nsec, " ns ", ns, " id ", mp.id)
			throw("sem_timedwait")
		}
		return 0
	}
	for {