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

[Peter Seibel]

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 at gigamonkeys.com
Gigamonkeys Consulting  :  http://www.gigamonkeys.com/