Method WaitLow

library/cpp/netliba/v12/udp_host.cpp:1759–1796

    }

    void TUdpHost::WaitLow(float seconds) {
        if (seconds < 1e-3)
            seconds = 0;
        if (seconds > MaxWaitTime)
            seconds = MaxWaitTime;
        if (IBIdleTime < 0.010) {
            seconds = 0;
        }
        if (seconds == 0) {
            ThreadYield();
        } else {
            AtomicAdd(IsWaiting, 1);
            if (seconds > MaxWaitTime2.load(std::memory_order_acquire))
                seconds = MaxWaitTime2.load(std::memory_order_acquire);
            MaxWaitTime2.store(DEFAULT_MAX_WAIT_TIME, std::memory_order_release);

            if (seconds == 0) {
                ThreadYield();
            } else {
                if (IB.Get()) {
                    for (float done = 0; done < seconds;) {
                        float deltaSleep = Min(seconds - done, 0.002f);
                        S.Wait(deltaSleep);
                        NHPTimer::STime tChk;
                        NHPTimer::GetTime(&tChk);
                        if (IB->Step(tChk)) {
                            IBIdleTime = 0;
                            break;
                        }
                        done += deltaSleep;
                    }
                } else {
                    S.Wait(seconds);
                }
            }
            AtomicAdd(IsWaiting, -1);
        }
    }

    void TUdpHost::CancelWait() {
        Event.Signal();