Re: Gtk2::ImageView memory issue

[Torsten Schoenfeld <kaffeetisch gmx de>]

Jeffrey Ratcliffe wrote:
> g_boxed_type_register_static is being called OK, so I guess the
> problem is that GBoxedFreeFunc isn't being triggered. But now I am out
> of my depth...
Do you have a GdkPixbufDrawCache entry in your 'maps' file?  Or do you call 
gperl_register_boxed for GdkPixbufDrawCache manually?  If neither of these, then 
Glib doesn't know about this type at all, and consequently doesn't set it up to 
inherit from Glib::Boxed.
You have a custom newSVGdkPixbufDrawCache function declared as 'static', so I 
guess you just call it manually wherever you need to convert a 
GdkPixbufDrawCache to an SV.  In that case, just free the thing with 
gdk_pixbuf_draw_cache_free once you're done with it.  There's also no point in 
registered a boxed type when you do it like this.
The alternative is to go GBoxed all the way: register a custom GBoxed type[1] 
and put an entry for it in your 'maps' file so that converters and typemaps are 
generated for it[2].  Then register custom wrap and unwrap functions for the new 
GBoxed type that convert to and from hashes.  See the handling of GtkBorder in 
Gtk2/xs/GtkEntry.xs for an example.
[1] The gdk_pixbuf_draw_cache_get_type you sent registers g_boxed_copy as the 
GBoxedCopyFunc -- this doesn't work.  g_boxed_copy is the generic function used 
to invoke the GBoxedCopyFunc registered for a type.  If the C library doesn't 
provide a copy function, just write a fake one which simply croaks.
[2] In your header file, make sure the type macro for the custom GBoxed type is 
defined before you include the generated '-autogen.h' header.  The converters 
defined in it are wrapped inside #ifdefs on the type macro.