mdw@git.distorted.org.uk Git - clg/blob - glib/gboxed.lisp

   1 ;; Common Lisp bindings for GTK+ v2.0
   2 ;; Copyright (C) 2001 Espen S. Johnsen <esj@stud.cs.uit.no>
   3 ;;
   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.
   8 ;;
   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.
  13 ;;
  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
  17
  18 ;; $Id: gboxed.lisp,v 1.12 2004-11-07 21:41:35 espen Exp $
  19
  20 (in-package "GLIB")
  21
  22
  23 (eval-when (:compile-toplevel :load-toplevel :execute)
  24   (init-types-in-library #.(concatenate 'string
  25                           (pkg-config:pkg-variable "glib-2.0" "libdir")
  26                           "/libgobject-2.0.so")))
  27
  28 (defclass boxed (struct)
  29   ()
  30   (:metaclass struct-class))
  31
  32
  33 ;;;; Metaclass for boxed classes
  34
  35 (eval-when (:compile-toplevel :load-toplevel :execute)
  36   (defclass boxed-class (struct-class)
  37     ())
  38
  39   (defmethod validate-superclass ((class boxed-class) (super standard-class))
  40     (subtypep (class-name super) 'boxed)))
  41
  42
  43 (defmethod shared-initialize ((class boxed-class) names
  44                               &rest initargs &key name alien-name)
  45   (declare (ignore initargs names))
  46   (call-next-method)
  47
  48   (let* ((class-name (or name (class-name class)))
  49          (type-number
  50           (find-type-number
  51            (or (first alien-name) (default-alien-type-name class-name)))))
  52     (register-type class-name type-number)))
  53
  54
  55 (defbinding %boxed-copy (type location) pointer
  56   ((find-type-number type) type-number)
  57   (location pointer))
  58
  59 (defbinding %boxed-free (type location) nil
  60   ((find-type-number type) type-number)
  61   (location pointer))
  62
  63 (defmethod reference-foreign ((class boxed-class) location)
  64   (%boxed-copy (class-name class) location))
  65
  66 (defmethod unreference-foreign ((class boxed-class) location)
  67   (%boxed-free (class-name class) location))
  68
  69
  70 ;;;;
  71
  72 (defun expand-boxed-type (type-number &optional slots)
  73   `(defclass ,(type-from-number type-number) (boxed)
  74      ,slots
  75      (:metaclass boxed-class)
  76      (:alien-name ,(find-type-name type-number))))
  77
  78 (register-derivable-type 'boxed "GBoxed" 'expand-boxed-type)
  79
  80 ;;;; Special boxed types
  81
  82 ;; (defclass gstring (boxed)
  83 ;;   ()
  84 ;;   (:metaclass boxed-class)
  85 ;;   (:alien-name "GString"))
  86
  87 ;; (deftype-method translate-from-alien
  88 ;;     gstring (type-spec location &optional weak-ref)
  89 ;;   `(let ((location ,location))
  90 ;;      (unless (null-pointer-p location)
  91 ;;        (prog1
  92 ;;         (c-call::%naturalize-c-string location)
  93 ;;       ,(unless weak-ref
  94 ;;          (unreference-alien type-spec location))))))
  95
  96 ;; (deftype-method translate-to-alien
  97 ;;     gstring (type-spec string &optional weak-ref)
  98 ;;   (declare (ignore weak-ref))
  99 ;;   `(let ((string ,string))
 100 ;;      ;; Always copy strings to prevent seg fault due to GC
 101 ;;      (funcall
 102 ;;       ',(proxy-class-copy (find-class type-spec))
 103 ;;       ',type-spec
 104 ;;       (make-pointer (1+ (kernel:get-lisp-obj-address string))))))
 105
 106 ;; (deftype-method cleanup-alien gstring (type-spec c-string &optional weak-ref)
 107 ;;   (when weak-ref
 108 ;;     (unreference-alien type-spec c-string)))
 109