Luís Oliveira <luismbo <at> gmail.com> writes:
On Thu, Apr 19, 2012 at 2:50 PM, Stelian Ionescu <sionescu <at> cddr.org>
wrote:
(with-foreign-object (p '(:struct timespec) 2) (mem-aref p '(:struct timespec) 1))
In order not to break existing code [...]
Existing code will not have this (:struct foo) syntax because it was introduced by the libffi merge. (mem-aref p 'timespec 1) should exhibit backwards-compatible behaviour.
Turns out, the problem is not with mem-aref, but with the mem-aref compile- macro. It binds *parse-bare-structs-as-pointers* to T, whereas mem-aref function doesn't, this affects the result of foreign-type-size.
(cffi:defcstruct foo (classid :short) (name :short) (methodid :short))(cffi:defcstruct foo (classid :short) (name :short)
(cffi:foreign-type-size 'foo) => 6
(let ((cffi::*parse-bare-structs-as-pointers* t)) (cffi:foreign-type-size 'foo)) => 8