Re: callbacks and locking

[Olexiy Avramchenko <ath beast stu cn ua>]

hugo hallqvist wrote:

> Hi,
>
> I'm trying to write an gtkprogram with multiplethreads, all has worked
> fine up until now where I have run into problems.
>
> I would like to know if it is ok to do gdk_threads_leave() / _enter()
> inside a callback to a gui-button. Is this ok, or will it ruin gtk's
> internal state?
>
> like this
>
> gint cb_download_ordinary_new_queue(GtkWidget *widget, gpointer data) {
>
> init blah blah..
>
> gdk_threads_leave();
>
> routine();
I think you can do this. But its usefull only if you're doing long 
processing
in *routine()* and wish another threads be able to use gtk stuff this time.

> gdk_threads_enter();
>
> return;
>
> }
>
> where X is
Hmm, X==routine() ? If so, the leave/enter is useless cause you run it
in one thread and lock (enter) occurs almost after the unlock (leave).

> void X() {
> lock_stuff();
> gdk_threads_enter();
> touch_gui_components();
> gdk_threads_leave()
> unlock_stuff();
> return;
> }
Olexiy