Stop QCoreApplication running in C++11 thread

SebastianM

Hi,
I've got QCoreApplication running in C++11 thread. It created there and it call exec() to stay in event loop. This thread is created to process dbus communicaiton. Rest of application is unaware of Qt.
Now I would like to kill this thread safely when whole application is closed.
How to do it? Any useful techniques? Callback?

Christian Ehrlicher

See QCoreApplication::quit()

SebastianM

Yes, I know.
Below works as class Communicate exist as long as main class. I know it not nice - calling from one thread to other.

class Communicate {
....
void run();
void * qt_app_ptr;
}

void run() {
thread_holder = std::thread([this, qt_app_ptr]{
	QCoreApplication app(argc, nullptr);
	qt_app_ptr = &app;    
	(.....)
	app.exec()
});
}

Communicate::~Communicate()
{
  static_cast<QCoreApplication*>(qt_app_ptr)->quit();
  thread_holder.join();
}

Christian Ehrlicher

No need to store a pointer to the app. Either use the static function QCoreApplication::exit(0) or qApp->quit().

Kent-Dorfman

in generic sense: send signal to thread, trap signal, execute QApplication::quit