Re: Gtkmm and fork()

[michi7x7 <mailing-lists michi7x7 de>]

Am 2010-04-10 15:17, schrieb MK:
> Chris Vine wrote:
>    
> > This won't work.  X won't allow two processes to share the same
> > resources.
> > If you are fork()ing to exec() another program, then you will need to
> > start a new thread and fork() from that
> >      
> You don't have to thread it.  I presume the purpose has nothing to do
> with gtk.  So you might as well quit() gtk immediately in the fork.
> After that you can do whatever you want.
>
> #include<gtkmm.h>
> #include<iostream>
>
> using namespace std;
>
> vector<pid_t>  Pids;
>
> void buttonpress() {
> 	static int i = 0;
> 	i++;
> 	pid_t pid = fork();
> 	cerr<<  i<<  ": "<<  pid<<endl;
> 	if (!pid) {
> 		Gtk::Main::quit();
> 		while (1) {
> 			sleep(1);
> 			cerr<<  i<<  " hello world"<<  endl;
> 		}
> 	} else Pids.push_back(pid);
> }
>
> int main(int argc, char *argv[]) {
> 	Gtk::Main kit(argc, argv);
> 	Gtk::Window win;
> 	Gtk::VBox box;
> 	Gtk::Button but("click me");
>
> 	win.set_title("gtkmm test");
> 	win.set_size_request(400,200);
> 	win.add(box);
>
> 	box.pack_start(but);
> 	but.signal_clicked().connect(
> 		sigc::ptr_fun(buttonpress),false);
>
> 	win.show_all();
> 	kit.run(win);
>
> 	vector<pid_t>::iterator it = Pids.begin(),
> 		end =  Pids.end();
> 	while(it != end) kill(*(it++),9);
>
> 	return 0;
> }
>
>    
That's not really beautiful...