X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/clg/blobdiff_plain/4e94e04b3254f38fa8ce7b43261058cd3b671025..a666b391b604d3afe86079e064e648d9062430ef:/glib/glib.lisp

diff --git a/glib/glib.lisp b/glib/glib.lisp
index 891196a..43eb8bc 100644
--- a/glib/glib.lisp
+++ b/glib/glib.lisp
@@ -1,195 +1,490 @@
-;; Common Lisp bindings for GTK+ v1.2.x
-;; Copyright (C) 1999 Espen S. Johnsen <espejohn@online.no>
+;; Common Lisp bindings for GTK+ 2.x
+;; Copyright 1999-2005 Espen S. Johnsen <espen@users.sf.net>
 ;;
-;; This library is free software; you can redistribute it and/or
-;; modify it under the terms of the GNU Lesser General Public
-;; License as published by the Free Software Foundation; either
-;; version 2 of the License, or (at your option) any later version.
+;; Permission is hereby granted, free of charge, to any person obtaining
+;; a copy of this software and associated documentation files (the
+;; "Software"), to deal in the Software without restriction, including
+;; without limitation the rights to use, copy, modify, merge, publish,
+;; distribute, sublicense, and/or sell copies of the Software, and to
+;; permit persons to whom the Software is furnished to do so, subject to
+;; the following conditions:
 ;;
-;; This library is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-;; Lesser General Public License for more details.
+;; The above copyright notice and this permission notice shall be
+;; included in all copies or substantial portions of the Software.
 ;;
-;; You should have received a copy of the GNU Lesser General Public
-;; License along with this library; if not, write to the Free Software
-;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-;; $Id: glib.lisp,v 1.2 2000-08-15 23:25:18 espen Exp $
+;; $Id: glib.lisp,v 1.44 2008-10-08 18:11:12 espen Exp $
 
 
 (in-package "GLIB")
+
 (use-prefix "g")
 
+#-sb-thread
+(progn
+  (defun make-mutex ()
+    nil)
+  
+  (defmacro with-mutex ((mutex) &body body)
+    (declare (ignore mutex))
+    `(progn ,@body)))
+
 
 ;;;; Memory management
 
-(define-foreign ("g_malloc0" allocate-memory) () pointer
-  (size unsigned-long))
+(deftype gsize () 'unsigned-int)
 
-(define-foreign ("g_realloc" reallocate-memory) () pointer
-  (address pointer)
-  (size unsigned-long))
+(defbinding malloc0 () pointer
+  (size gsize))
 
-(define-foreign ("g_free" deallocate-memory) () nil
+(defbinding free () nil
   (address pointer))
 
-(defun copy-memory (from length &optional (to (allocate-memory length)))
-  (kernel:system-area-copy from 0 to 0 (* 8 length))
-  to)
-
-
-
-;;;; Linked list
-
-(deftype glist () 'pointer)
-(deftype double-list (type) `(or (null (cons ,type list))))
-
-
-(define-foreign ("g_list_append" %glist-append) () glist
-  (glist glist)
-  (data unsigned))
-
-(defmacro glist-append (glist value type-spec)
-  (ecase (first (mklist (translate-type-spec type-spec)))
-    (unsigned `(%glist-append ,glist ,value))
-;    (signed `(%glist-append ,glist (signed-to-unsigned ,value)))
-    (system-area-pointer `(%glist-append ,glist (system:sap-int ,value)))))
-
-
-(defmacro glist-data (glist type-spec)
-  (ecase (first (mklist (translate-type-spec type-spec)))
-    (unsigned `(sap-ref-unsigned ,glist 0))
-    (signed `(sap-ref-signed ,glist 0))
-    (system-area-pointer `(sap-ref-sap ,glist 0))))
+(setf *memory-allocator* #'malloc0)
+(setf *memory-deallocator* #'free)
 
+(defbinding (reallocate-memory "g_realloc") () pointer
+  (address pointer)
+  (size gsize))
+
+(defbinding (slice-alloc "g_slice_alloc0") () pointer
+  (block-size gsize))
+
+;;;; User data is a mechanism to store references to lisp objects in
+;;;; foreign code
+
+(defvar *user-data-lock* (make-mutex))
+(defvar *user-data* (make-hash-table))
+(defvar *user-data-next-id* 1)
+
+(defun register-user-data (object &optional destroy-function)
+  (check-type destroy-function (or null symbol function))
+  (with-mutex (*user-data-lock*)
+    (setf
+     (gethash *user-data-next-id* *user-data*)
+     (cons object destroy-function))
+    (1- (incf *user-data-next-id*))))
+
+(defun find-user-data (id)
+  (check-type id fixnum)
+  (with-mutex (*user-data-lock*)
+    (multiple-value-bind (user-data p) (gethash id *user-data*)
+      (values (car user-data) p))))
+
+(defun user-data-exists-p (id)
+  (nth-value 1 (find-user-data id)))
+
+(defun update-user-data (id object)
+  (check-type id fixnum)
+  (with-mutex (*user-data-lock*)
+    (multiple-value-bind (user-data exists-p) (gethash id *user-data*)
+      (cond
+       ((not exists-p) (error "User data id ~A does not exist" id))
+       (t 
+	(when (cdr user-data)
+	  (funcall (cdr user-data) (car user-data)))
+	(setf (car user-data) object))))))
+
+(defun destroy-user-data (id)
+  (check-type id fixnum)
+  (with-mutex (*user-data-lock*)
+    (multiple-value-bind (user-data exists-p) (gethash id *user-data*)
+      (cond
+;       ((not exists-p) (error "User data id ~A does not exist" id))
+       (t
+	(when (cdr user-data)
+	  (funcall (cdr user-data) (car user-data)))
+	(remhash id *user-data*))))))
+
+(defun take-user-data (id)
+  (check-type id fixnum)
+  (multiple-value-bind (user-data exists-p) (gethash id *user-data*)
+    (cond
+      ((not exists-p) (error "User data id ~A does not exist" id))
+      (t 
+	(when (cdr user-data)
+	  (funcall (cdr user-data) (car user-data)))
+	(remhash id *user-data*)
+	(car user-data)))))
+
+(defmacro with-user-data ((var object) &body body)
+  `(let ((,var (register-user-data ,object)))
+     (unwind-protect
+	  ,@body
+       (destroy-user-data ,var))))
+
+
+(deftype user-data-id () 'pointer-data)
+
+
+;;;; Quarks
+
+(deftype quark () 'unsigned)
+
+(defbinding %quark-from-string () quark
+  (string string))
+
+(defun quark-intern (object)
+  (etypecase object
+    (quark object)
+    (string (%quark-from-string object))
+    (symbol (%quark-from-string (format nil "clg-~A:~A" 
+				 (package-name (symbol-package object)) 
+				 object)))))
+
+(defbinding quark-to-string () (static string)
+  (quark quark))
+
+
+;;;; Linked list (GList)
+
+(deftype glist (type) 
+  `(or null (cons ,type list)))
+
+(defbinding (%glist-prepend "g_list_prepend") () pointer
+  (glist (or null pointer))
+  (nil null))
+
+(defbinding (%glist-reverse "g_list_reverse") () pointer
+  (glist (or null pointer)))
+
+(defun make-glist (element-type list &optional temp-p)
+  (let ((writer (if (functionp element-type)
+		    element-type
+		  (writer-function element-type :temp temp-p))))
+    (loop
+     for element in list
+     as glist = (%glist-prepend nil) then (%glist-prepend glist)
+     do (funcall writer element glist)
+     finally (return (%glist-reverse glist)))))
 
 (defun glist-next (glist)
   (unless (null-pointer-p glist)
-    (sap-ref-sap glist +size-of-sap+)))
- 
+    (ref-pointer glist #.(size-of 'pointer))))
   
-(define-foreign ("g_list_free" glist-free) () nil
+;; Also used for gslists
+(defun map-glist (seqtype function glist element-type &optional (ref :read))
+  (let ((reader (if (functionp element-type)
+		    element-type
+		  (reader-function element-type :ref ref))))
+    (case seqtype 
+     ((nil)
+      (loop
+       as element = glist then (glist-next element)
+       until (null-pointer-p element)
+       do (funcall function (funcall reader element))))
+     (list
+      (loop
+       as element = glist then (glist-next element)
+       until (null-pointer-p element)
+       collect (funcall function (funcall reader element))))
+     (t
+      (coerce 
+       (loop
+	as element = glist then (glist-next element)
+	until (null-pointer-p element)
+	collect (funcall function (funcall reader element)))
+       seqtype)))))
+
+(defbinding (glist-free "g_list_free") () nil
   (glist pointer))
 
-
-(deftype-method translate-type-spec double-list (type-spec)
-  (declare (ignore type-spec))
-  'system-area-pointer)
-
-(deftype-method translate-to-alien double-list (type-spec list &optional copy)
-  (declare (ignore copy))
-  (let* ((element-type-spec (second (type-expand-to 'double-list type-spec)))
-	 (to-alien (translate-to-alien element-type-spec 'element t)))
-    `(let ((glist (make-pointer 0))) 
-       (dolist (element ,list glist)
-	 (setq glist (glist-append glist ,to-alien ,element-type-spec))))))
-
-(deftype-method
-    translate-from-alien
-    double-list (type-spec glist &optional (alloc :dynamic))
-  (let ((element-type-spec (second (type-expand-to 'double-list type-spec))))
-    `(let ((glist ,glist)
-	   (list nil))
-       (do ((tmp glist (glist-next tmp)))
-	   ((null-pointer-p tmp))
-	 (push
-	  ,(translate-from-alien
-	    element-type-spec `(glist-data tmp ,element-type-spec) alloc)
-	  list))
-       ,(when (eq alloc :dynamic)
-	  '(glist-free glist))
-       (nreverse list))))
-
-(deftype-method cleanup-alien double-list (type-spec glist &optional copied)
-  (declare (ignore copied))
-  (let* ((element-type-spec (second (type-expand-to 'double-list type-spec)))
-	 (alien-type-spec (translate-type-spec element-type-spec)))
-    `(let ((glist ,glist))
-       (unless (null-pointer-p glist)
-	 ,(when (eq alien-type-spec 'system-area-pointer)
-	    `(do ((tmp glist (glist-next tmp)))
-		 ((null-pointer-p tmp))
-	       ,(cleanup-alien
-		 element-type-spec `(glist-data tmp ,element-type-spec) t)))
-	 (glist-free glist)))))
-
-
-
-;;; Array
-#|
-(define-foreign ("g_array_new" %array-new) () garray
-  (zero-terminated boolean)
-  (clear boolean)
-  (element-size unsigned-int))
-
-(defun array-new (&key zero-terminated clear (element-size 4) initial-contents)
-  (let ((array (%array-new zero-terminated clear element-size)))
-    (when initial-contents
-      (dolist (element initial-contents)
-	(array-append array element)))
-    array))
-
-(define-foreign ("g_array_free" %array-free) () none
-  (array garray)
-  (free-segment boolean))
-
-(defun array-free (array &optional free-data (free-segment t))
-  (when free-data
-    (dotimes (i (array-get-size array))
-      (free (array-get-pointer array i))))
-  (%array-free array free-segment))
-
-(defmacro with-array (binding &body body)
-  (let ((array (gensym)))
-    (destructuring-bind (var &rest args
-			 &key (free-contents nil) (free-segment t)
-			 &allow-other-keys )
-        binding
-      (remf args :free-contents)
-      (remf args :free-segment)
-      `(let* ((,array (array-new ,@args))
-	      (,var (array-get-data ,array)))
-	 (unwind-protect
-	     ,@body
-	   (array-free ,array ,free-contents ,free-segment))))))
-
-;; cl-gtk.c
-(define-foreign ("g_array_insert_int" array-insert-int) () garray
-  (array garray)
-  (index unsigned-int)
-  (value int))
-
-(defun array-insert-value (array index value)
-  (etypecase value
-    (null (array-insert-int array index 0))
-    (integer (array-insert-int array index value))
-    (string (array-insert-int array index (sap-int (gforeign::pointer-to-sap (%strdup value)))))
-    (pointer (array-insert-int array index (sap-int (gforeign::pointer-to-sap value))))))
-
-(defun array-prepend (array value)
-  (array-insert-value array 0 value))
-
-(defun array-append (array value)
-  (array-insert-value array (array-get-size array) value))
-
-;; cl-gtk.c
-(define-foreign ("g_array_get_int" array-get-int) () int
-  (array garray)
-  (index unsigned-int))
-
-(defun array-get-pointer (array index)
-  (gforeign::sap-to-pointer (int-sap (array-get-int array index))))
-
-;; cl-gtk.c
-(define-foreign ("g_array_get_data" array-get-data) () pointer
-  (array garray))
-
-(define-foreign ("g_array_set_size" array-set-size) () garray
-  (array garray)
-  (size unsigned-int))
-
-;; cl-gtk.c
-(define-foreign ("g_array_get_size" array-get-size) () int
-  (array garray))
-|#
\ No newline at end of file
+(defun destroy-glist (glist element-type &optional temp-p)
+  (let ((destroy (if (functionp element-type)
+		     element-type
+		   (destroy-function element-type :temp temp-p))))
+    (loop
+     as element = glist then (glist-next element)
+     until (null-pointer-p element)
+     do (funcall destroy element)))
+  (glist-free glist))
+
+(define-type-method alien-type ((type glist))
+  (declare (ignore type))
+  (alien-type 'pointer))
+
+(define-type-method argument-type ((type glist))
+  'list)
+
+(define-type-method return-type ((type glist))
+  'list)
+
+(define-type-method size-of ((type glist) &key inlined)
+  (assert-not-inlined type inlined)
+  (size-of 'pointer))
+
+(define-type-method type-alignment ((type glist) &key inlined)
+  (assert-not-inlined type inlined)
+  (type-alignment 'pointer))
+
+(define-type-method alien-arg-wrapper ((type glist) var list style form &optional copy-in-p)
+  (destructuring-bind (element-type) (rest (type-expand-to 'glist type))
+    (cond
+      ((and (in-arg-p style) (not (out-arg-p style)))
+       `(with-pointer (,var (make-glist ',element-type ,list ,(not copy-in-p)))
+	  (unwind-protect
+	      ,form
+	    ,(unless copy-in-p
+	       `(destroy-glist ,var ',element-type t)))))
+      ((and (in-arg-p style) (out-arg-p style))
+       (let ((glist (make-symbol "GLIST")))
+	 `(with-pointer (,glist (make-glist ',element-type ,list ,(not copy-in-p)))
+            (with-pointer (,var ,glist)		      
+	      (unwind-protect
+		  ,form
+		,(unless copy-in-p
+		   `(destroy-glist ,glist ',element-type t)))))))
+      ((and (out-arg-p style) (not (in-arg-p style)))
+       `(with-pointer (,var)
+	  ,form)))))
+
+(define-type-method to-alien-form ((type glist) list &optional copy-p)
+  (declare (ignore copy-p))
+  (destructuring-bind (element-type) (rest (type-expand-to 'glist type))
+    `(make-glist ',element-type ,list)))
+
+(define-type-method to-alien-function ((type glist) &optional copy-p)
+  (destructuring-bind (element-type) (rest (type-expand-to 'glist type))
+    (values
+     #'(lambda (list)
+	 (make-glist element-type list (not copy-p)))
+     (unless copy-p
+       #'(lambda (list glist)
+	   (declare (ignore list))
+	   (destroy-glist glist element-type t))))))
+
+(define-type-method from-alien-form ((type glist) form &key (ref :free))
+  (destructuring-bind (element-type) (rest (type-expand-to 'glist type))
+    `(let ((glist ,form))
+       (unwind-protect
+	   (map-glist 'list #'identity glist ',element-type 
+	    ,(ecase ref (:free :get) ((:static :temp) :peek) (:copy :read)))
+	 ,(when (eq ref :free)
+	    `(destroy-glist glist ',element-type))))))
+
+(define-type-method from-alien-function ((type glist) &key (ref :free))
+  (destructuring-bind (element-type) (rest (type-expand-to 'glist type))
+    (ecase ref
+      (:free 
+       #'(lambda (glist)
+	   (prog1
+	       (map-glist 'list #'identity glist element-type :get)
+	     (glist-free glist))))
+      (:copy
+       #'(lambda (glist)
+	   (map-glist 'list #'identity glist element-type :read)))
+      ((:static :temp)
+       #'(lambda (glist)
+	   (map-glist 'list #'identity glist element-type :peek))))))
+
+(define-type-method writer-function ((type glist) &key temp inlined)
+  (assert-not-inlined type inlined)
+  (let ((element-type (second (type-expand-to 'glist type))))
+    #'(lambda (list location &optional (offset 0))
+	(setf 
+	 (ref-pointer location offset)
+	 (make-glist element-type list temp)))))
+
+(define-type-method reader-function ((type glist) &key (ref :read) inlined)
+  (assert-not-inlined type inlined)
+  (let ((element-type (second (type-expand-to 'glist type))))
+    (ecase ref
+      ((:read :peek)
+       #'(lambda (location &optional (offset 0))
+	   (unless (null-pointer-p (ref-pointer location offset))
+	     (map-glist 'list #'identity (ref-pointer location offset) element-type ref))))
+      (:get
+       #'(lambda (location &optional (offset 0))
+	   (unless (null-pointer-p (ref-pointer location offset))
+	     (prog1
+		 (map-glist 'list #'identity (ref-pointer location offset) element-type :get)
+	       (glist-free (ref-pointer location offset))
+	       (setf (ref-pointer location offset) (make-pointer 0)))))))))
+
+(define-type-method destroy-function ((type glist) &key temp inlined)
+  (assert-not-inlined type inlined)
+  (let ((element-type (second (type-expand-to 'glist type))))
+    #'(lambda (location &optional (offset 0))
+	(unless (null-pointer-p (ref-pointer location offset))
+	  (destroy-glist (ref-pointer location offset) element-type temp)
+	  (setf (ref-pointer location offset) (make-pointer 0))))))
+
+(define-type-method copy-function ((type glist) &key inlined)
+  (assert-not-inlined type inlined)
+  (destructuring-bind (element-type) (rest (type-expand-to 'glist type))
+    (let ((copy-element (copy-function element-type)))
+      #'(lambda (from to &optional (offset 0))
+	  (unless (null-pointer-p (ref-pointer from offset))
+	    (loop
+	     as from-list = (ref-pointer from offset) then (glist-next from-list)
+	     as to-list = (%glist-prepend nil) then (%glist-prepend to-list)
+	     do (funcall copy-element from-list to-list)
+	     while (glist-next from-list)
+	     finally (setf (ref-pointer to offset) (%glist-reverse to-list))))))))
+
+
+;;;; Single linked list (GSList)
+
+(deftype gslist (type) `(or null (cons ,type list)))
+
+(defbinding (%gslist-prepend "g_slist_prepend") () pointer
+  (gslist pointer)
+  (nil null))
+
+(defbinding (%gslist-append "g_slist_append") () pointer
+  (glist (or null pointer))
+  (nil null))
+
+
+(defun make-gslist (element-type list &optional temp-p)
+  (let ((writer (if (functionp element-type)
+		    element-type
+		  (writer-function element-type :temp temp-p))))
+    (loop
+     for element in (reverse list)
+     as gslist = (%gslist-prepend (make-pointer 0)) then (%gslist-prepend gslist)
+     do (funcall writer element gslist)
+     finally (return gslist))))
+
+(defbinding (gslist-free "g_slist_free") () nil
+  (gslist pointer))
+
+(defun destroy-gslist (gslist element-type &optional temp-p)
+  (loop
+   with destroy = (destroy-function element-type :temp temp-p)
+   as element = gslist then (glist-next element)
+   until (null-pointer-p element)
+   do (funcall destroy element 0))
+  (gslist-free gslist))
+
+(define-type-method alien-type ((type gslist))
+  (declare (ignore type))
+  (alien-type 'pointer))
+
+(define-type-method argument-type ((type gslist))
+  'list)
+
+(define-type-method return-type ((type gslist))
+  'list)
+
+(define-type-method size-of ((type gslist) &key inlined)
+  (assert-not-inlined type inlined)
+  (size-of 'pointer))
+
+(define-type-method type-alignment ((type gslist) &key inlined)
+  (assert-not-inlined type inlined)
+  (type-alignment 'pointer))
+
+(define-type-method alien-arg-wrapper ((type gslist) var list style form &optional copy-in-p)
+  (destructuring-bind (element-type) (rest (type-expand-to 'gslist type))
+    (cond
+      ((and (in-arg-p style) (not (out-arg-p style)))
+       `(with-pointer (,var (make-gslist ',element-type ,list ,(not copy-in-p)))
+	  (unwind-protect
+	      ,form
+	    ,(unless copy-in-p
+	       `(destroy-gslist ,var ',element-type t)))))
+      ((and (in-arg-p style) (out-arg-p style))
+       (let ((gslist (make-symbol "GSLIST")))
+	 `(with-pointer (,gslist (make-gslist ',element-type ,list ,(not copy-in-p)))
+            (with-pointer (,var ,gslist)		      
+	      (unwind-protect
+		  ,form
+		,(unless copy-in-p
+		   `(destroy-gslist ,gslist ',element-type t)))))))
+      ((and (out-arg-p style) (not (in-arg-p style)))
+       `(with-pointer (,var)
+	  ,form)))))
+
+(define-type-method to-alien-form ((type gslist) list &optional copy-p)
+  (declare (ignore copy-p))
+  (destructuring-bind (element-type) (rest (type-expand-to 'gslist type))
+    `(make-gslist ',element-type ,list)))
+
+(define-type-method to-alien-function ((type gslist) &optional copy-p)
+  (destructuring-bind (element-type) (rest (type-expand-to 'gslist type))
+    (values
+     #'(lambda (list)
+	 (make-gslist element-type list (not copy-p)))
+     (unless copy-p
+       #'(lambda (list gslist)
+	   (declare (ignore list))
+	   (destroy-gslist gslist element-type t))))))
+
+(define-type-method from-alien-form ((type gslist) form &key (ref :free))
+  (destructuring-bind (element-type) (rest (type-expand-to 'gslist type))
+    `(let ((gslist ,form))
+       (unwind-protect
+	   (map-glist 'list #'identity gslist ',element-type
+	    ,(ecase ref (:free :get) ((:static :temp) :peek) (:copy :read)))
+	 ,(when (eq ref :free)
+	    `(destroy-gslist gslist ',element-type))))))
+
+(define-type-method from-alien-function ((type gslist)  &key (ref :free))
+  (destructuring-bind (element-type) (rest (type-expand-to 'gslist type))
+    (ecase ref
+      (:free 
+       #'(lambda (glist)
+	   (prog1
+	       (map-glist 'list #'identity glist element-type :get)
+	     (gslist-free glist))))
+      (:copy
+       #'(lambda (glist)
+	   (map-glist 'list #'identity glist element-type :read)))
+      ((:static :temp)
+       #'(lambda (glist)
+	   (map-glist 'list #'identity glist element-type :peek))))))
+
+(define-type-method writer-function ((type gslist) &key temp inlined)
+  (assert-not-inlined type inlined)
+  (destructuring-bind (element-type) (rest (type-expand-to 'gslist type))
+    (let ((element-writer (writer-function element-type :temp temp)))
+      #'(lambda (list location &optional (offset 0))
+	  (setf 
+	   (ref-pointer location offset)
+	   (make-gslist element-writer list))))))
+
+(define-type-method reader-function ((type gslist) &key (ref :read) inlined)
+  (assert-not-inlined type inlined)
+  (let ((element-type (second (type-expand-to 'gslist type))))
+    (ecase ref
+      ((:read :peek)
+       #'(lambda (location &optional (offset 0))
+	   (unless (null-pointer-p (ref-pointer location offset))
+	     (map-glist 'list #'identity (ref-pointer location offset) element-type ref))))
+      (:get
+       #'(lambda (location &optional (offset 0))
+	   (unless (null-pointer-p (ref-pointer location offset))
+	     (prog1
+		 (map-glist 'list #'identity (ref-pointer location offset) element-type :get)
+	       (gslist-free (ref-pointer location offset))
+	       (setf (ref-pointer location offset) (make-pointer 0)))))))))
+
+(define-type-method destroy-function ((type gslist) &key temp inlined)
+  (assert-not-inlined type inlined)
+  (let ((element-type (second (type-expand-to 'gslist type))))
+    #'(lambda (location &optional (offset 0))
+	(unless (null-pointer-p (ref-pointer location offset))
+	  (destroy-gslist (ref-pointer location offset) element-type temp)
+	  (setf (ref-pointer location offset) (make-pointer 0))))))
+
+(define-type-method copy-function ((type gslist) &key inlined)
+  (assert-not-inlined type inlined)
+  (destructuring-bind (element-type) (rest (type-expand-to 'gslist type))
+    (let ((copy-element (copy-function element-type)))
+      #'(lambda (from to &optional (offset 0))
+	  (unless (null-pointer-p (ref-pointer from offset))
+	    (loop
+	     as from-list = (ref-pointer from offset) 
+	                    then (glist-next from-list)
+	     as to-list = (setf (ref-pointer to offset) (%gslist-append nil)) 
+	                  then (%gslist-append to-list)
+	     do (funcall copy-element from-list to-list)
+	     while (glist-next from-list)))))))