1 ;; Common Lisp bindings for GTK+ v2.0
2 ;; Copyright (C) 2001 Espen S. Johnsen <esj@stud.cs.uit.no>
4 ;; This library is free software; you can redistribute it and/or
5 ;; modify it under the terms of the GNU Lesser General Public
6 ;; License as published by the Free Software Foundation; either
7 ;; version 2 of the License, or (at your option) any later version.
9 ;; This library is distributed in the hope that it will be useful,
10 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 ;; Lesser General Public License for more details.
14 ;; You should have received a copy of the GNU Lesser General Public
15 ;; License along with this library; if not, write to the Free Software
16 ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ;; $Id: gboxed.lisp,v 1.18 2005/03/11 10:56:58 espen Exp $
23 (defclass boxed (struct)
25 (:metaclass struct-class))
27 (defmethod instance-finalizer ((instance boxed))
28 (let ((location (proxy-location instance))
29 (type-number (type-number-of instance)))
31 (remove-cached-instance location)
32 (%boxed-free type-number location))))
35 ;;;; Metaclass for boxed classes
37 (eval-when (:compile-toplevel :load-toplevel :execute)
38 (defclass boxed-class (struct-class)
41 (defmethod validate-superclass ((class boxed-class) (super standard-class))
42 (subtypep (class-name super) 'boxed)))
45 (defmethod shared-initialize ((class boxed-class) names &key name gtype)
46 (declare (ignore names))
48 (let ((class-name (or name (class-name class))))
49 (unless (find-type-number class-name)
50 (register-type class-name
51 (or (first gtype) (default-type-init-name class-name))))))
53 (defbinding %boxed-copy () pointer
54 (type-number type-number)
57 (defbinding %boxed-free () nil
58 (type-number type-number)
61 (defmethod reference-foreign ((class boxed-class) location)
62 (%boxed-copy (find-type-number class) location))
64 (defmethod unreference-foreign ((class boxed-class) location)
65 (%boxed-free (find-type-number class) location))
70 (defun expand-boxed-type (type-number forward-p slots)
71 `(defclass ,(type-from-number type-number) (boxed)
74 (:metaclass boxed-class)
75 (:gtype ,(register-type-as type-number))))
77 (register-derivable-type 'boxed "GBoxed" 'expand-boxed-type)
79 ;;;; Special boxed types
81 ;; (defclass gstring (boxed)
83 ;; (:metaclass boxed-class)
84 ;; (:alien-name "GString"))
86 ;; (deftype-method translate-from-alien
87 ;; gstring (type-spec location &optional weak-ref)
88 ;; `(let ((location ,location))
89 ;; (unless (null-pointer-p location)
91 ;; (c-call::%naturalize-c-string location)
93 ;; (unreference-alien type-spec location))))))
95 ;; (deftype-method translate-to-alien
96 ;; gstring (type-spec string &optional weak-ref)
97 ;; (declare (ignore weak-ref))
98 ;; `(let ((string ,string))
99 ;; ;; Always copy strings to prevent seg fault due to GC
101 ;; ',(proxy-class-copy (find-class type-spec))
103 ;; (make-pointer (1+ (kernel:get-lisp-obj-address string))))))
105 ;; (deftype-method cleanup-alien gstring (type-spec c-string &optional weak-ref)
107 ;; (unreference-alien type-spec c-string)))
111 ;;;; NULL terminated vector of strings
113 (deftype strings () '(null-terminated-vector string))
114 (register-type 'strings '|g_strv_get_type|)