[java-gnome-hackers] threads

[Mark H. <mh...@ca...>]

Hi,
  I've been looking again at the gtk code. I'm not sure if this is new
for gtk 2.2 - I'm sure it wasn't there when I looked last year.

Apparently, Gtk methods can be called from multiple threads, if all  are
enclosed within  gdk_threads_enter()/ gdk_threads_leave() statements
(with a gtk_flush() before the leave()).g_thread_init() and
gdk_threads_init() must also be called from each thread.

Unfortunately I don't have enough time at the moment to look at this in
more detail. I'm not sure whether the enter/leave calls have to be made
if the code is running in the main thread - If they don't, then we could
make modifications easily to allow multiple threads. If they do, then
this may simply mean that the user has to make calls to enter/leave
before modifying the gui. Most callbacks are done in the graphics
thread.
I am also confused by the examples having:
gdk_threads_enter ();
  gtk_main ();
gdk_threads_leave ();
wouldn't this block any other threads acquiring the lock?

Relevant web pages are:
http://developer.gnome.org/doc/API/2.0/gtk/gtk-question-index.html#id2848858
http://developer.gnome.org/doc/API/2.0/gdk/gdk-Threads.html
-- 
  .''`. Mark Howard
 : :' :
 `. `'  http://www.tildemh.com 
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