Paul,
My experience has been that it is a big mistake to distribute
GTK calls (or any X based widget set for that matter) among threads.
I use use multi-threading, however the gui controls live in a single
thread.
Hal
At 05:48 PM 4/3/01 -0400, Paul Davis wrote:
> >Is there a way to let me change parameters ? Maybe lookup signals or
> >somenthing like that ? I've heard something about threads but I don't
> >know what it is.... I'm really a newbie so if someone could give me some
> >very detailled way to do this, it would be very nice.
>
>nobody is going to give you a detailed enough account without simply
>pointing you at source code.
>
>a thread is bit like a process, except that instead of being an
>entirely separate program with its own protected virtual memory, it
>runs with complete access to the memory of the thread in which it was
>started. when you start a new process, you can't share data without
>specific arrangements to do so. when you start a new thread, all data
>is shared between all the threads in the process. the different
>threads all run "concurrently", where "concurrently" means
>time-sharing however many processors your system has with any other
>threads in any other processes that are ready to run.
>
>you can start by reading up on the pthreads library. then, from
>handler for the adjustment->changed signal, you can do this:
>
> void *my_computationally_intensive_thread (void *arg)
> {
> ... do the stuff you want here ...
> }
>
> gint
> adjustment_changed_handler (GtkWidget *widget)
> {
> pthread_t thread_id;
>
> pthread_create (&thread_id, NULL,
> my_computationally_intensive_thread,
> 0);
> pthread_detach (thread_id);
>
> return TRUE;
> }
>
>Thats just the bare bones. You'll no doubt need some mutexes to
>prevent various bad things from happening, and you should almost
>certainly make no calls to GTK or GDK from the separate thread. If you
>plan to do that, there's a bit more work you need to do.
>
>I happen to like a book called "Programming With Threads" by Kleiman
>et al. but there are many others on the topic floating around.
>
>--p
>
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