25 Oct
2010
25 Oct
'10
3:41 p.m.
In article <tcr-C05AC2.17212025102010@news.gmane.org>, Tobias C Rittweiler <tcr@freebits.de> wrote:
Does CFFI contain a Lisp type which represents the machine's word size?
I guess it could be defined as
(deftype word-size () `(unsigned-byte ,(* 8 (foreign-type-size :long))))
Are there any caveats? E.g. what about a 32bit Lisp implementation on a 64bit architecture?
Perhaps the type should rather be defined in each backend.
Clarification: I'm concerned about the 32bit Lisp on 64bit architecture issue, because for my purposes I'd like (make-pointer (the word-size X)) never signal a type error. -T.