Method wait

thread/thread.cpp:1648–1654

        return (*perrno == -1) ? 0 : -1;
    }
    int waitq::wait(Timeout timeout)
    {
        static_assert(sizeof(q) == sizeof(thread_list), "...");
        auto lst = (thread_list*)&q;
        int ret = thread_usleep(timeout, lst);
        return waitq_translate_errno(ret);
    }
    int waitq::wait_defer(Timeout timeout, void(*defer)(void*), void* arg) {
        static_assert(sizeof(q) == sizeof(thread_list), "...");
        auto lst = (thread_list*)&q;