I tried using threads and it worked very well. But I have a little question regarding a mutex. I want the sf::RenderWindow to close when the QT Window closes (or when a button is clicked). This is how I do it:
I created a class that has a Run function, which looks like this:
void CRenderThread::Run()
{
sf::RenderWindow RenderWindow(sf::VideoMode(300, 200), "SFML works!");
sf::Text text("SFML works");
m_bRunning = true;
while (RenderWindow.isOpen() && m_bRunning)
{
sf::Event event;
while (RenderWindow.pollEvent(event))
{
if (event.type == sf::Event::Closed)
RenderWindow.close();
}
RenderWindow.clear();
RenderWindow.draw(text);
RenderWindow.display();
}
RenderWindow.close();
return;
}
The class also has a Exit function which looks like this:
void CRenderThread::Exit()
{
m_bRunning = false;
}
The Run function is the thread function, which I create in main(). The Thread is a public member of my (Qt) QMainwindow. So it looks a bit complicated:
QMainWindow w;
sf::Thread thread(&CRenderThread::Run, &w.RenderThread);
thread.launch();
The reason the Thread is a member of my QMainWindow is, so that I can call the exit function from there (on button click or on close). But my Question is: I obviously need a mutex to secure my m_bRunning from being assigned to false in the wrong moment. But where do I have to put the Lock? Obviously around the false assigment in the exit function, but I cant put the other before the
while (RenderWindow.isOpen() && m_bRunning), because the lock would never open until the while loop finishes. And inside the while loop wouldn't make to much sense either, because the
m_nRunning lookup already happened.
I don't really know what to do. I hope this is not a stupid question and that I'm not simply missing something. Thanks in advance,
Foaly
