Re: Multi-threaded UI Freezes on GDK Call

["Brian J. Tarricone" <bjt23 cornell edu>]

Michael McCann wrote:
> Michael R. Head wrote:
> > Does your special function take time to do its job? If so, then that
> > would be why. For example:
> >
> > ...
> > while(1) {
> > gdk_threads_enter();
> > sleep(1)
> > gdk_threads_leave();
> > sleep(10)
> > };
> > ...
> >
> > you'd freeze your app for a second every 10 seconds.
>
> Ahh, ok. How else can I accomplish my goal, then? I need to give GTK the 
> lock, as I'm calling GDK from another function not in the main GTK loop. 
> I tried leaving out gdk_threads_enter()/leave() in the CPU-intensive 
> function, but X gives me errors.

Don't use gdk in the CPU-intensive function:

while(1) {
    sleep(1);
    do_time_consuming_task();
    gdk_threads_enter();
    update_ui();
    gdk_threads_leave();

}

You may need to factor out some code, but this is the right (read: only) 
way to do it if you don't want to block the UI.

        -brian