Re: spawn functions?

[haratron <haratron gmail com>]

What do you mean by shared memory?
Can you give a code example?

On Thu, Apr 12, 2012 at 10:48 PM, Sergei Steshenko <sergstesh yahoo com> wrote:
> --- On Thu, 4/12/12, haratron <haratron gmail com> wrote:
>
> > From: haratron <haratron gmail com>
> > Subject: spawn functions?
> > To: gtk-perl-list gnome org
> > Date: Thursday, April 12, 2012, 11:46 AM
> > Hello,
> >
> > it seems that the spawn* functions of Gtk have not been
> > ported to gtk2-perl.
> > I have this problem where I need to launch an external
> > process from a
> > button's click callback. It's a TTS (text to speech)
> > application that
> > has play, pause and stop buttons. The actual speech is been
> > done by a
> > python script that I need to execute (don't ask..). The GUI
> > in
> > gtk-perl shouldn't block, so that I am able to e.g. press
> > pause/stop
> > while the voice speaks. I've tried a lot of ways but it
> > always ends up
> > to one of the following:
> > - GUI gets blocked and I can't press pause/stop buttons
> > - GUI doesn't block (usually when I'm forking from within
> > the
> > callback) but once the python script is done speaking, the
> > gtk-perl
> > GUI is closed as well. I read this is a problem of gtk and
> > there are
> > the spawn* functions to compensate for that.
> >
> > How can I do this?
> > _______________________________________________
> > gtk-perl-list mailing list
> > gtk-perl-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtk-perl-list
>
> I do this using shared memory.
>
> My gtk+ Perl script sets a flag in shared memory that new data is available (after making it available) and 
> the consumer process monitors the flag and grabs the new data when it sees the set flag.
>
> There is also an acknowledge mechanism, i.e. the IPC is bidirectional.
>
> Regards,
>  Sergei.