Thread::sleepOrExit()

General JUCE discussion
1

Hi,

What about a Thread::sleepOrExit(const int sleepTimeMillisecond) method, that does sleep for the given time, while still checking threadShouldExit regularly and exiting then ?

The code is very simple:

    /** Sleep this thread for the given duration in millisecond.
         Contrary to Thread::sleep, if the thread is signaled to exit, this method exit immediately instead of after the duration time elapsed. */
    bool sleepOrExit(const unsigned int durationMs) const
    {
         double endTime = Time::getMillisecondCounter() + durationMs;
         while (!threadShouldExit() && Time::getMillisecondCounter() < endTime) sleep(roundDoubleToInt(jlimit(0, 30.0, endTime - Time::getMillisecondCounter())));
    }
2

I prefer to use wait() for that - it’ll get interrupted when the thread is told to stop, so it basically does exactly what you’re asking for there.

3

Yes you’re right.

Here’s another version that does check an external event at the same time.

    /** Wait for a signaled event or end of thread */
    bool waitForEvent(WaitableEvent & event, const int timeoutMs)
    {
        double endTime = Time::getMillisecondCounter() + timeoutMs;
        bool ret = false;
        while (!threadShouldExit() && !(ret = event.wait(roundDoubleToInt(jlimit(0.0, 20.0, endTime - Time::getMillisecondCounter())))) && Time::getMillisecondCounter() < endTime);
        return ret;
    }