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Re: [Libguestfs] [PATCH] Non-working support for GObject Introspection.



On Tue, Mar 16, 2010 at 02:53:29PM +0000, Daniel P. Berrange wrote:
> GObject is the primary root object, but things don't neccessarily need
> to inherit from GObject. Since you're trying to directly expose libguestfs'
> own object(s) you'll probably need to register them as base types  using
> the GType APIs. This section of the API docs gives a semi-useful intro to
> GTypes
> 
>   http://library.gnome.org/devel/gobject/stable/chapter-gtype.html
> 
> Ultimately this comes down to a call to g_type_register_static()
> 
>   http://library.gnome.org/devel/gobject/stable/gobject-Type-Information.html#g-type-register-static
> 
> but it is not very well documented because 99% of apps just inherit
> from GObject instead of introducing new base types like libguestfs
> would need todo.

Unfortunately this doesn't work.  The handle (guestfs_h *) is wrapped
inside a GType:

typedef struct _GuestfsH {
  GObject parent;
  guestfs_h *h;
} GuestfsH;

I can now register this easily enough, but GObject won't automatically
unpack that handle when it passes it to the other functions.  ie.  The
other functions would receive a GuestfsH, instead of a guestfs_h *,
and they won't know what to do with the former.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://et.redhat.com/~rjones/libguestfs/
See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html


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