On Thu, 24 May 2007 01:03:25 +1000 Andrew Cowie <[EMAIL PROTECTED]> wrote:
> http://research.operationaldynamics.com/blogs/andrew/#gtk-thread-awareness Keep on. :-) > I didn't quite agree with this conclusion: > > > do not use gdk_threads_set_lock_functions() to facilitate (a) > > as that was rather critical to things working [so far] for us; hang > tight until I get a chance to write up part 2, but I am going to take > the time this week to carefully consider the traps you cite and try > and see how they affect the pattern we developed. What I warned about was ment in the context of recursive mutexes, of course. The problem I had using gdk_threads_set_lock_functions() was that gtk wanted to unlock the recursive mutex from time to time while it had not been locked by it (but a thread of mine). I got aware of this by using my own recursive mutex implementation which emits warnings like "encountered a try to unlock although not owner" (I don't know if you can track things of this kind using glib mutexes). I must confess I haven't got a deep answer to this problem--I simply assume it has to do with the gdk_threads_enter() call right before gtk_main(). Anyway, I tried to seperate my own calls to gdk_threads_enter/leave() from the ones envoked by gtk internally (which were, however, triggering my recursive lock though as long as I used gdk_threads_set_lock_functions). However, gdk_threads_set_lock_functions() makes it impossible to distinguish between gdk_threads_enter/leave coming from *your* threads and from *inside gtk* -- while it is exactly this difference what is needed (at least here) to make the recursive mutex work correctly. So, for now, I do not use this function but rather (a) call recursive lock/unlock functions (locking the gdk lock once only) as a substitute for gds_threads_enter/leave () before calling any gtk functions--except for gtk_main() where I use the direct call to gdk_threads_enter/leave, and (b) let gtk call gdk_threads_enter/leave () internally without notifying me so that is does not interfer with my recursive mutex. This seems to work. Felix _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
