Collecting native garbage

Hi, Probably this was asked before, or probably you will find this question somewhat stupid, nevertheless. Is there any kind of a tutorial or a guide into how to achieve automatic garbage collection of the native objects referenced from Lisp objects? So far I found just this thread that contains useful information in tiny bits but not a coherent cookbook style guide: http://lists.common-lisp.net/pipermail/cffi-devel/2011-May/003541.html Thanks, Victor