r5562: *** empty log message ***

[uffi.git] / src / objects.lisp

diff --git a/src/objects.lisp b/src/objects.lisp
index 9938a8eed4cca472bf58bfef7295975fd6e47bb8..62f153ee4d659b37ff371c3a499c0fb4e9fef872 100644 (file)
--- a/src/objects.lisp
+++ b/src/objects.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Feb 2002
 ;;;;
-;;;; $Id: objects.lisp,v 1.16 2003/08/14 19:35:05 kevin Exp $
+;;;; $Id: objects.lisp,v 1.20 2003/08/23 01:05:53 kevin Exp $
 ;;;;
 ;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -228,3 +228,29 @@ an array of TYPE with size SIZE. The TYPE parameter is evaluated."
   '(error "WITH-CAST-POINTER not (yet) implemented for ~A"
           (lisp-implementation-type)))
 
+(defmacro def-foreign-var (names type module)
+  #-lispworks (declare (ignore module))
+  (let ((foreign-name (if (atom names) names (first names)))
+        (lisp-name (if (atom names) (make-lisp-name names) (second names)))
+        #-allegro
+        (var-type (convert-from-uffi-type type :type)))
+    #+(or cmu scl)
+    `(alien:def-alien-variable (,foreign-name ,lisp-name) ,var-type)
+    #+sbcl
+    `(sb-alien:define-alien-variable (,foreign-name ,lisp-name) ,var-type)
+    #+allegro
+    `(define-symbol-macro ,lisp-name
+      (ff:fslot-value-typed (quote ,(convert-from-uffi-type type :deref))
+                            :c (ff:get-entry-point ,foreign-name)))
+    #+lispworks
+    `(progn
+      (fli:define-foreign-variable (,lisp-name ,foreign-name)
+                                    :accessor :address-of
+                                    :type ,var-type
+                                    :module ,module)
+      (define-symbol-macro ,lisp-name (fli:dereference (,lisp-name)
+                                                        :copy-foreign-object nil)))
+    #-(or allegro cmu scl sbcl lispworks)
+    `(define-symbol-macro ,lisp-name
+      '(error "DEF-FOREIGN-VAR not (yet) defined for ~A"
+        (lisp-implementation-type)))))