On Sat, 2009-09-26 at 04:09 +0200, Johan Ur Riise wrote:

I have some enums defined, a defcfun and I use the keywords of the enum when I call the function.

The documentation says: Keywords will be automatically converted to values and vice-versa when being passed as arguments to or returned from foreign functions, respectively.

But this does not seem to be the case, I get a type error.

The following should be a minimalistic runnable example. What am I doing wrong?

CL-USER> (require 'cffi) ; loading system definition from C:/prg/libcl/babel/babel.asd into #<Package "ASDF0"> ; registering #<SYSTEM BABEL #x14DE5106> as BABEL ; loading system definition from C:/prg/libcl/alexandria/alexandria.asd into #<Package "ASDF0"> ; registering #<SYSTEM :ALEXANDRIA #x14E038B6> as ALEXANDRIA ; loading system definition from C:/prg/libcl/trivial-features/trivial-features.asd into #<Package "ASDF0"> ; registering #<SYSTEM TRIVIAL-FEATURES #x14E5DAE6> as TRIVIAL-FEATURES CFFI NIL CL-USER> (in-package :cffi) #<Package "CFFI"> CFFI> (defctype SOCKET :uint) SOCKET CFFI> (defcenum af :af-unspec :af-unix :af-inet) AF CFFI> (defcenum sock-type (:sock-stream 1) :sock-dgram :sock-raw) SOCK-TYPE CFFI> (defcenum pf :pf-unspec :pf-unix :pf-inet) PF CFFI> (defcfun ("socket" win-socket) socket "Creates a socket with the overlapped mode as default" (af :int32) (type :int) (protocol :int)) WIN-SOCKET

DEFCENUM doesn't define constants(as in C), but a type which gets translated to integers if you specify it as argument type. In other words, this is correct:

(defcfun ("socket" win-socket) socket "Creates a socket with the overlapped mode as default" (af af) (type sock-type) (protocol pf))

CFFI> (defun make-socket () (win-socket :af-inet :sock-stream :pf-inet)) MAKE-SOCKET CFFI> (make-socket) ; Evaluation aborted. CFFI> ;->value :AF-INET is not of the expected type (SIGNED-BYTE 32). ;[Condition of type TYPE-ERROR]

This is correct because the type you've specified is :int while you passed a keyword.