Re: Casting from a wrapped class to a possible implemented interface

[Murray Cumming <murrayc murrayc com>]

On Mon, 2008-03-03 at 20:19 -0500, José Alburquerque wrote:
> José Alburquerque wrote:
> > My concern, however, is that because the newly created 
> > Gst::ElementInterfaced class is not "wrapped", it doesn't look like it 
> > will be destroyed when all references to the underlying gobject are 
> > gone.  
> 
> I believe I found a solution to this using g_object_weak_ref 
> <http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#g-object-weak-ref> 
> <http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GWeakNotify> 
> to notify the unwrapped instance when the gobject is destroyed.

Yes, this seems worth a try. Glib::ObjectBase normally does this by
waiting for a callback that is set when setting GObject data, but this
should work too, and seems more obvious.

>   This 
> may enable casting from elements to interfaces that the underlying C 
> object implements.  Thoughts?

It's an interesting approach. It seems sensible. I'd be interested to
see it in action.

Well done.

-- 
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