[cffi-devel] Passing Lisp values into and back out of C?

This must either be really trivial or completely impossible: suppose I need to create an instance of a C structure that has a void* slot. I want to fill that slot with (some representation of) an arbitrary Lisp value so that when that structure is handed back to my Lisp code I can get back to the Lisp object. Other than keeping my own integer->object mapping and passing the integer to C and translating it back to the object when I get it back, is there some easier way to do this in CFFI? -Peter -- Peter Seibel : peter@gigamonkeys.com Gigamonkeys Consulting : http://www.gigamonkeys.com/