Re: problems when using g_main_loop_quit from different thread

[Tristan Van Berkom <tristan van berkom gmail com>]

Armin Bauer wrote:

> Hi everyone,
>
> i am experiencing random problems here if i use g_main_loop_quit from a
> different thread than where the GMainLoop runs.
>
> my program looks like this:
>
> 1. in main: create a new context and a new loop
> 2. spawn a thread
> 3. call g_main_loop_run in the thread on the previously created loop
> 4. some time later: call g_main_loop_quit from main
>
> whats supposed to happen (i guess) is that the main loop quits. But
> sometimes the call to loop_quit just has not effect, so the main loop
> continues to run.
>
> Is this a known problem or am i doing something wrong?
>  

My guess is that it just doent make sence to remove the mainloop
while the other thread is sleeping in poll(), sure the code will lock
its mutex and everything; but when the other thread wakes up;
how could it deal with a "gone mainloop" ?

Solution ? I would use an idle function to the thread's loop; using
the GSource lower level apis (i.e. create the idle source and do
g_source_attach to the thread's context); and just quit from
there.

Cheers,
                              -Tristan