src_corelib_kernel_qdeadlinetimer.cpp

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    void executeOperation(int msecs)
    {
        QDeadlineTimer deadline(msecs);
        do {
            if (readFromDevice(deadline.remainingTime()))
                break;
            waitForReadyRead(deadline);
        } while (!deadline.hasExpired());
    }
 
    using namespace std::chrono;
    using namespace std::chrono_literals;
 
    QDeadlineTimer deadline(30s);
    device->waitForReadyRead(deadline);
    if (deadline.remainingTime<nanoseconds>() > 300ms)
        cleanup();
 
    using namespace std::chrono;
    using namespace std::chrono_literals;
    auto now = steady_clock::now();
    QDeadlineTimer deadline(now + 1s);
    Q_ASSERT(deadline == now + 1s);
 
    using namespace std::chrono_literals;
    QDeadlineTimer deadline(250ms);
 
    using namespace std::chrono_literals;
    deadline.setRemainingTime(250ms);
 
    mutex.tryLock(deadline.remainingTime());
 
    qint64 realTimeLeft = deadline.deadline();
    if (realTimeLeft != (std::numeric_limits<qint64>::max)()) {
        realTimeLeft -= QDeadlineTimer::current().deadline();
        // or:
        //QElapsedTimer timer;
        //timer.start();
        //realTimeLeft -= timer.msecsSinceReference();
    }
 
    qint64 realTimeLeft = deadline.deadlineNSecs();
    if (realTimeLeft != std::numeric_limits<qint64>::max())
        realTimeLeft -= QDeadlineTimer::current().deadlineNSecs();
 
    return d1.deadlineNSecs() == d2.deadlineNSecs();
 
    return d1.deadlineNSecs() != d2.deadlineNSecs();
 
    return d1.deadlineNSecs() < d2.deadlineNSecs();
 
    return d1.deadlineNSecs() <= d2.deadlineNSecs();
 
    return d1.deadlineNSecs() > d2.deadlineNSecs();
 
    return d1.deadlineNSecs() >= d2.deadlineNSecs();