Function wait_all

thread/thread.cpp:2039–2051

* Waiting for all current vcpu photon threads finish * @return 0 for all done, -1 for failure */

     * @return 0 for all done, -1 for failure
     */
    static int wait_all(RunQ rq, vcpu_t* vcpu) {
        auto &sleepq = vcpu->sleepq;
        auto &standbyq = vcpu->standbyq;
        while (!AtomicRunQ(rq).size_1or2() || !sleepq.empty() || !standbyq.empty()) {
            if (!sleepq.empty()) {
                // sleep till all sleeping threads ends
                thread_usleep(1000UL);
            } else {
                thread_yield();
            }
        }
        return 0;
    }

    int wait_all() {
        RunQ rq;