Question

I have a C++ application that is running on the foreground. I need a timer that will run at the same time as the application. When the timer reaches zero, I need the timer to popup a window.

I can’t use sleep() because the who application sleeps. Please advice on how to do this.

Answer 1

Since you’re using C++11, I suggest using the thread library.

What you probably want is either std::this_thread::sleep_for or std::this_thread::sleep_until, which can be called in the context your timer thread.

Something like this…

std::thread timer([]() {
  std::this_thread::sleep_for(std::chrono::seconds(5));
  std::cout << "hello, world!" << std::endl;
});
std::cout << "thread begun..." << std::endl;
timer.join();