I was having trouble running the example in the documents:
(foreign-funcall-pointer (foreign-symbol-pointer "abs")
:int -42 :int)
I got
SIMPLE-ERROR: Unknown CFFI type: 4.
I was going crazy, until i searched google code and found this working example:
http://www.google.com/codesearch/p?hl=en#wVc2UuwHR3k/trunk/tree/resolve.lisp&q=foreign-funcall-pointer%20lang:lisp
Retrying with an added "()" before the arg list works.
foreign-funcall-pointer (foreign-symbol-pointer "abs")
() :int -42 :int)
works !
This allows one to call a defcallback function from lisp
making the following unnecessary in the documentation of defcallback
"The macro defcallback defines a Lisp function the can be called
from C (but not from Lisp)."
because the following works:
(defcallback fx
:int
((x :int))
(progn (print "test") 3))
(foreign-funcall-pointer (callback fx)
() :int 4 :int)
Thanks for the cffi,
Naveen
_______________________________________________
cffi-devel mailing list
cffi-devel@common-lisp.net
http://common-lisp.net/cgi-bin/mailman/listinfo/cffi-devel
