Re: [Sbcl-devel] Small issue with sb-alien's callbacks.

[Cyrus H. <ch...@bo...>]

Hi Luis,

I had a similar problem and solved it with the following hack:

;;; FIXME -- CLH 2005-08-24
;;;
;;; This is a hack to get around the fact that in SBCL
;;; we can't declare an alien-callback that returns type
;;; :void unless sb-alien::*values-type-okay* is t.
;;;
(eval-when (:compile-toplevel :load-toplevel :execute)
   (setf sb-alien::*values-type-okay* t))

I'm not sure if that's the right thing to do or not, but it does seem  
to solve the problem for me. Hopefully someone with a better  
knowledge of values types, etc... can chime in here.

Cyrus

On Sep 27, 2005, at 5:23 AM, Luis Oliveira wrote:

> Hello,
>
> ALIEN-LAMBDA doesn't accept void as a return type, as shown below:
>
> luis@nhop:~$ sbcl --sysinit /dev/null --userinit /dev/null
> This is SBCL 0.9.4.67, an implementation of ANSI Common Lisp.
> More information about SBCL is available at <http://www.sbcl.org/>.
>
> SBCL is free software, provided as is, with absolutely no warranty.
> It is mostly in the public domain; some portions are provided under
> BSD-style licenses.  See the CREDITS and COPYING files in the
> distribution for more information.
> * (sb-alien::alien-lambda sb-alien:void ())
>
> debugger invoked on a SIMPLE-ERROR: cannot use values types here
>
> Type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL.
>
> restarts (invokable by number or by possibly-abbreviated name):
>   0: [ABORT] Exit debugger, returning to top level.
>
> (SB-ALIEN::ALIEN-VALUES-TYPE-TRANSLATOR (VALUES) #<NULL-LEXENV>)
> 0]
>
>
> It's a SIMPLE-ERROR so it should have a SIMPLE-FIX. ;-)
>
> -- 
> Luis Oliveira
> luismbo (@) gmail (.) com
> Equipa Portuguesa do Translation Project
> http://www.iro.umontreal.ca/translation/registry.cgi?team=pt
>
>
>
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