[Gtk-sharp-list] Agressive ref-couting.

Miguel de Icaza miguel@ximian.com
11 Sep 2002 22:24:39 -0400


> >    The following patch makes mPhoto work again, when GC happens, we are
> > destroying objects that we did not ref previously.
> I'm not sure this is the solution.  We shouldn't need to ref every
> object, because we should own the vast majority of handles that are
> returned by native methods.  Is this a situation where you are using
> methods with "const" returns in the native library?

The problem happens with GCs and Styles:

static Gdk.GC EnsureGC (IntPtr raw) {
        if (raw == IntPtr.Zero)
                return null;
        Gdk.GC ret = (Gdk.GC) GLib.Object.GetObject (raw);
        if (ret == null)
                ret = new Gdk.GC (raw);
        return ret;

static extern IntPtr gtksharp_gtk_style_get_white_gc (IntPtr style);

public Gdk.GC WhiteGC {
        get { return EnsureGC (gtksharp_gtk_style_get_white_gc(Handle));

The problem is that we are wrapping an object which is owned somewhere