Re: How to wrap objects based on GInitiallyUnowned (floating references)?

["Philipp Kerling" <k philipp gmail com>]

hi,

2006/11/14, Murray Cumming <murrayc murrayc com>:
> On Tue, 2006-11-14 at 18:03 +0100, Philipp Kerling wrote:
> > Hi,
> >
> > how can I wrap a C object which derives from GInitiallyUnowned (and
> > especially NOT from GObject or GtkObject) to C++? I found no simple m4
> > macro like _CLASS_GINITIALLYUNOWNED for it. If I use GObject and
> > _CLASS_GOBJECT,  a sample application of the library crashes at
> > shutdown, because the C++ class doesn´t store a reference on the
> > underlying C instance and so it tries to free the memory twice.
>
> I think you should be able to use G_OBJECT with this, but I would like
> to know why the object derives from GInitiallyUnowned instead of from
> GObject. Maybe it should be used like GtkObject without depending on GTK
> +. The author could tell you.
_CLASS_GOBJECT doesn´t work, because then the application crashes at
shutdown, as mentioned above.
Here is a short explanation of GInitiallyUnowned:
"GInitiallyUnowned is derived from GObject. The only difference
between the two is that the initial reference of a GInitiallyUnowned
is flagged as a floating reference. This means that it is not
specifically claimed to be "owned" by any code portion. The main
motivation for providing floating references is C convenience."
See http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html,
section Description for details.
> May I see the code, so I can try to debug this problem for you. Please
> provide a tarball or repository checkout details, with information about
> how to build it.
http://download.savannah.gnu.org/releases/criawips/libccc-0.0.4.tar.gz
build
./configure && make && sudo make install

http://files.coding-industry.de/libcccmm-0.1.0.tar.bz2
build: ./configure && make


best regards,
phiker