RE: Is GTK multi-threaded by default??

["Sai Korada" <sai korada xilinx com>]

Thanks Tristan,
    We could realize that driver is adding up delay, and it's not
exactly the problem with timer callback. Thanks for helping us out.

Laxmi


-----Original Message-----
From: Tristan Van Berkom [mailto:tvb gnome org] 
Sent: Wednesday, November 22, 2006 9:03 PM
To: Sai Korada
Cc: gtk-app-devel-list gnome org
Subject: Re: Is GTK multi-threaded by default??

Sai Korada wrote:
> Hi,
>
> I'm developing an application using GTK, that talks with device
driver.
> In this process I've introduced a timer callback, where the timer is
set
> to 10, and, the callback function transfers some bytes to memory card.
> Then it should get the status from the memory card. My question here
is,
> whether GTK will wait in the callback to read the status or will it
call
> the callback again as the timer lapses. How can I ensure that the
> callback function is called only after the status is read from the
> memory card.

   The answer to your subject line is "no", you should read
this text [1] to understand more about what gtk+ does when inside
the gtk_main() function and how event sources work etc, you should
also note that g_timeout_add() isnt intended to be "precise" per se,
and shouldnt be used to ensure an exact timeout in a time critical
application, although I doubt that is really a requirement for
you judging by your email (might be).

Cheers,
                    -Tristan

[1]http://developer.gnome.org/doc/API/2.0/glib/glib-The-Main-Event-Loop.
html