Re: gtkmm 3.4.0 (gtk 3.4.2) multithread app graphic deterioration

[Kjell Ahlstedt <kjell ahlstedt bredband net>]

I don't know if this is any help, but anyway, have you seen these 
comments at
http://developer.gnome.org/gdk3/stable/gdk3-Threads.html

-- Unfortunately the above holds with the X11 backend only. With the 
Win32 backend, GDK calls should not be attempted from multiple threads 
at all.

-- Before calling gdk_threads_leave() from a thread other than your main 
thread, you probably want to call gdk_flush() to send all pending 
commands to the windowing system.

Kjell

2012-07-05 14:52, Giuseppe Penone skrev:
> Hi,
> I'm writing a multithread app where different threads operate on the 
> graphic.
> The non gui threads operate on graphic only after semaphores:
>
> gdk_threads_enter();
> OPERATION ON GUI FROM NON GUI THREAD
> gdk_threads_leave();
>
> and the gui thread is opened this way:
>
> g_thread_init(NULL);
> gdk_threads_init();
> Gtk::Main  kit(argc, argv);
> ...
> gdk_threads_enter();
> Gtk::Main::run(p_window);
> gdk_threads_leave();
>
> After some time the gui starts to deteriorate as in screenshot 
> http://www.freeimagehosting.net/hjltx (label over an icon, columns not 
> expanding...).
> I have no clue about what could be wrong since there is no 
> warning/error from the terminal
> while in the past when I missed a gdk_threads_enter/gdk_threads_leave 
> I had errors printed and the app crashed.
>
> Can anybody help me to understand where the error could be given the 
> screenshot?
> I'm also considering porting the app back to gtkmm2 but since I use 
> glade I'm afraid this will be not that easy.