X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;ds=sidebyside;f=src%2Fobjects.cl;h=014fe9d2fae243f97d4d2b63c94a29ea583eba0c;hb=f73eb94e15649aba5fcfbe3a900aa72f31f46a96;hp=1ac0ad8b4080f6c1836a10b69eb447d2be3b9693;hpb=7cb20f3bc266ede16dfcd449986136c43c4a2d57;p=uffi.git

diff --git a/src/objects.cl b/src/objects.cl
index 1ac0ad8..014fe9d 100644
--- a/src/objects.cl
+++ b/src/objects.cl
@@ -1,4 +1,4 @@
-;;;; -*- Mode: ANSI-Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
 ;;;; *************************************************************************
 ;;;; FILE IDENTIFICATION
 ;;;;
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Feb 2002
 ;;;;
-;;;; $Id: objects.cl,v 1.10 2002/03/21 07:56:45 kevin Exp $
+;;;; $Id: objects.cl,v 1.15 2002/03/23 16:32:39 kevin Exp $
 ;;;;
 ;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -21,22 +21,22 @@
 
 (defmacro allocate-foreign-object (type &optional (size :unspecified))
   "Allocates an instance of TYPE. If size is specified, then allocate
-an array of TYPE with size SIZE."
+an array of TYPE with size SIZE. The TYPE parameter is evaluated."
   (if (eq size :unspecified)
       (progn
 	#+cmu
-	`(alien:make-alien ,(convert-from-uffi-type type :allocation))
+	`(alien:make-alien ,(convert-from-uffi-type (eval type) :allocation))
 	#+lispworks
-	`(fli:allocate-foreign-object :type ',(convert-from-uffi-type type :allocate))
+	`(fli:allocate-foreign-object :type ,(convert-from-uffi-type type :allocate))
 	#+allegro
-	`(ff:allocate-fobject ',(convert-from-uffi-type type :allocate) :c))
+	`(ff:allocate-fobject ,(convert-from-uffi-type type :allocate) :c))
       (progn
 	#+cmu
-	`(alien:make-alien ,(convert-from-uffi-type type :allocation) ,size)
+	`(alien:make-alien ,(convert-from-uffi-type (eval type) :allocation) ,size)
 	#+lispworks
-	`(fli:allocate-foreign-object :type ',(convert-from-uffi-type type :allocate) :nelems ,size)
+	`(fli:allocate-foreign-object :type ,(convert-from-uffi-type type :allocate) :nelems ,size)
 	#+allegro
-	`(ff:allocate-fobject '(:array ,(convert-from-uffi-type type :allocate) ,(eval size)) :c)
+	`(ff:allocate-fobject '(:array ,(convert-from-uffi-type (eval type) :allocate) ,(eval size)) :c)
       )
   ))
 
@@ -64,6 +64,13 @@ an array of TYPE with size SIZE."
   #+lispworks `(fli:make-pointer :address 0 :type ,type)
   )
 
+(defmacro char-array-to-pointer (obj)
+  #+cmu `(alien:cast ,obj (* (alien:unsigned 8)))
+  #+lispworks `(fli:make-pointer :type '(:unsigned :char)
+				:address (fli:pointer-address ,obj))
+  #+allegro obj
+  )
+
 (defmacro deref-pointer (ptr type)
   "Returns a object pointed"
   #+(or cmu lispworks) (declare (ignore type))
@@ -100,19 +107,31 @@ an array of TYPE with size SIZE."
   obj
   )
 
-#|
-(defmacro allocate-byte-array (nsize)
+;; TYPE is evaluated.
+(defmacro with-foreign-object ((var type) &rest body)
+  #-(or cmu lispworks) ; default version
+  `(let ((,var (allocate-foreign-object ,type)))
+    (unwind-protect
+	 (progn ,@body)
+      (free-foreign-object ,var)))
   #+cmu
-  `(alien:make-alien (alien:unsigned 8) ,nsize)
+  (let ((obj (gensym)))
+    `(alien:with-alien ((,obj ,(convert-from-uffi-type (eval type) :allocate)))
+       (let ((,var (alien:addr ,obj)))
+	 ,@body)))
   #+lispworks
-  `(fli:allocate-foreign-object :type :byte :nelems ,nsize)
-  #+allegro
-  `(ff:allocate-fobject (array :byte ,nsize))
-)
+  `(fli:with-dynamic-foreign-objects ((,var ,(convert-from-uffi-type
+					      (eval type) :allocate)))
+    ,@body)
+  )
 
-(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)))
+
+	    
+