[Qt-interest] Cleanly exit Qt app with <CTRL-C> from Linux console

[Jorge Abrines]

Hi Markus,

I think this is not related to signals but to objects being destroyed at main 
exit. Are you creating some kind of blocking objects (sockets, database 
connections)? do you have threads? if so is the message "... x threads didn't 
exit" being printed?

Best regards,

Jorge

Markus Franke wrote:
> 
> Dear all,
> 
> during system development I am running my Qt application from a console.
> 
> If I press <CTRL-C> within the console a SIGINT is sent to the 
> application which is catched by a signal handler. From within this 
> signal handler I am calling QApplication::exit(0) which in turn calls 
> the Destructor of my main QApplication object.
> 
>  From time to time I observe that the application hangs for about 30 
> seconds just at the last line of my main() function which returns the 
> return value of QApplication::exec(). (see code below)
> 
> ---snip---
> int main(int argc, char *argv[])
> {
>     Application* app = new Application(argc, argv);
> 
>     int ret = app->exec();
> 
>     delete app;
> 
>     qDebug("This line is still reached");
>     return ret; // this line is hanging for about 30 seconds
> }
> ---snap---
> 
> Is there anything else which I have to take care off if I want to exit 
> my application via <CTRL-C>?
> 
> 
> Thanks in advance and with best regards,
> Markus
> 
> 
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