Tim Janik wrote: > On Thu, 17 Jan 2008, Alexander Larsson wrote: > > >> On Wed, 2008-01-16 at 15:03 +0000, [EMAIL PROTECTED] wrote: >> >>> I noticed the weakref introduction says that notifies can be called many >>> times: >>> >>> http://library.gnome.org/devel/gobject/unstable/gobject-memory.html#gobject-memory-weakref >>> >>> ... which is invoked when the object runs its dispose method. As such, >>> each weak ref can be invoked more than once upon object finalization >>> (since dispose can run more than once during object finalization). >>> >>> I'm not sure this is right: looking at the source for gobject it seems >>> that the notifies are a fire-once thing, and are removed upon firing. >>> >>> Should I open a docs bug on this? (or am I confused?) >>> > > you mis the facts that new weak refs can be added at any point in time, > such as after dispose, in finalize or even during weakref notifies. > (that's actually the semantics of GObject's GData mechanism which > is used to implement weakrefs) > > >> I actually have a related question. I remember that weak refs weren't >> allowed to ressurect the object. However, with the weak ref callbacks >> running from dispose, and dispose being allowed to ressurect the object, >> why can't weak refs ressurect? >> > > because weakrefs will also run during finalization, and an object > can not be resurrected from finalization. > > >> Maybe weak ref callbacks should be moved to finalization? >> > > conceptually yes. regarding backwards compatibility, no. >
Then there is another docs bug, g_object_weak_ref() docs say: A GWeakNotify <cid:part1.03020602.08010607@tamu.edu> function can be added to an object as a callback that gets triggered when the object is finalized. Since the object is already being finalized when the GWeakNotify <cid:part1.03020602.08010607@tamu.edu> is called, there's not much you could do with the object, apart from e.g. using its adress as hash-index or the like. I have never seen the docs quoted in the original mail, and what docs say about g_object_weak_ref() implies that weak ref callback is called 1) exactly once; 2) after the object is finalized (and so I got some code which supposes that the callback is called exactly once). So what is the truth? Possibly more than once, and before finalize()? Best regards, Yevgen _______________________________________________ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
