Dear developers,
can closures be used as callbacks, i.e. will the following kind of code work?
(let ((ptr nil)) (let ((a 3)) (defcallback add-a :int ((b :int)) (+ a b)) (setq ptr (callback add-a))) (c-function ptr))
Best regards Bruno Daniel
Dear developers,
I apologize for asking this question, since I just found out that it has already been addressed last year:
http://common-lisp.net/pipermail/cffi-devel/2006-February/000525.html "Re: unnamed callback (closures?) [...] If all else failed, you could resort to passing something like:
#+sbcl (alien-sap (alien-lambda ...)) #+ecl #| whatever is appropriate for an ecl anon callback |#
as a pointer to a CFFI function."
I'm a little bit worried because alien-lambda is undocumented in both the SBCL and the CMUCL manuals.
Best regards, Bruno Daniel
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Bruno Daniel