X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;ds=inline;f=src%2Fobjects.cl;h=b0b34f07ca98fb8191238cdf7f9fd8e5285c24eb;hb=4054fe997dbce15071a1d2b96a082b4a4a5a8363;hp=fdecab26d91c9909582a8bfdaffa8f84389be4f9;hpb=e1ba5e8ff148275ed252b179f43a4b045c1dcaf6;p=uffi.git

diff --git a/src/objects.cl b/src/objects.cl
index fdecab2..b0b34f0 100644
--- a/src/objects.cl
+++ b/src/objects.cl
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Feb 2002
 ;;;;
-;;;; $Id: objects.cl,v 1.9 2002/03/19 16:42:59 kevin Exp $
+;;;; $Id: objects.cl,v 1.11 2002/03/21 14:49:14 kevin Exp $
 ;;;;
 ;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -74,22 +74,21 @@ an array of TYPE with size SIZE."
 
 #+lispworks ;; with LW, deref is a character
 (defmacro ensure-char-character (obj)
-  "Ensures that the dereference of a :char is a character"
+  obj
   )
 
 #+(or allegro cmu)
 (defmacro ensure-char-character (obj)
-  "Ensures that the dereference of a :char is a character"
   `(code-char ,obj)
   )
   
 #+lispworks
 (defmacro ensure-char-integer (obj)
-  "Ensures that the dereference of a :char is a character"
  `(char-code ,obj))
 
 #+(or allegro cmu)
 (defmacro ensure-char-integer (obj)
+  obj
   ) ;; (* :char) dereference is already an integer
 
 (defmacro pointer-address (obj)
@@ -101,19 +100,21 @@ an array of TYPE with size SIZE."
   obj
   )
 
-#|
-(defmacro allocate-byte-array (nsize)
-  #+cmu
-  `(alien:make-alien (alien:unsigned 8) ,nsize)
-  #+lispworks
-  `(fli:allocate-foreign-object :type :byte :nelems ,nsize)
-  #+allegro
-  `(ff:allocate-fobject (array :byte ,nsize))
-)
+;; Simple first pass. Will later create optimized routines for
+;; various platforms.
+(defmacro with-foreign-object ((var type &rest etc) &rest body)
+  (let ((result (gensym)))
+    `(let* ((,var (allocate-foreign-object ,type ,@etc))
+	    (,result (progn ,@body)))
+      (free-foreign-object ,var)
+      ,result)))
 
-(defmacro deref-byte-array (array position)
-  #+cmu `(alien:deref ,array ,position)
-  #+lispworks `(fli:dereference ,array :index ,position)
-  #+allegro `(ff:fslot-value-typed '(:array :byte) :c ,array ,position)
-)
-|#
+(defmacro with-foreign-objects (bindings &rest body)
+  (if bindings
+      `(with-foreign-object ,(car bindings)
+	(with-foreign-objects ,(cdr bindings)
+	  ,@body))
+      `(progn ,@body)))
+
+	    
+