Re: Multiple threads and gtk_main()

[Eduardo M KALINOWSKI <ekalin laposte net>]

Gabriele Greco escreveu:
> I've a few threads (more than one) doing some work (not accessing GTK 
> functions), I'd like to have a general way to make them notify their 
> work to the main loop.
>
> I used the g_idle_add() in the previous context where I had only a 
> thread with this behaviour, but with two or more threads the 
> g_idle_add() method of notification is not correct IMHO (what happens if 
>   two threads call g_idle_add() before the call of the first one is 
> processed by the glib main loop?)
> [...]
> I though about using a GAsyncQueue for every thread but in this way the 
> problem I have is how to notify the main loop that there is something on 
> a queue, I've not found anything in the documentation... I fear the only 
>   way it's to use a pipe or a socket, or an idle function, but in this 
> case I will occur again in the locking problem, I hope I'm wrong about 
> this so I'm asking here :)
Make your threads add stuff to a single GAsyncQueue. Let an idle 
function (or a timeout function) always run, that checks the GAsyncQueue 
and does something if there is something to do, or simply returns if it 
is empty. Wouldn't that work?