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

   1 ;; Common Lisp bindings for GTK+ v1.2.x
   2 ;; Copyright (C) 1999 Espen S. Johnsen <espejohn@online.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: glib.lisp,v 1.8 2001-02-11 20:21:13 espen Exp $
  19
  20
  21 (in-package "GLIB")
  22
  23 (use-prefix "g")
  24
  25
  26 ;;;; Memory management
  27
  28 (define-foreign ("g_malloc0" allocate-memory) () pointer
  29   (size unsigned-long))
  30
  31 (define-foreign ("g_realloc" reallocate-memory) () pointer
  32   (address pointer)
  33   (size unsigned-long))
  34
  35 (define-foreign ("g_free" deallocate-memory) () nil
  36   (address pointer))
  37
  38 (defun copy-memory (from length &optional (to (allocate-memory length)))
  39   (kernel:system-area-copy from 0 to 0 (* 8 length))
  40   to)
  41
  42
  43 ;;;; User data mechanism
  44
  45 (internal *user-data* *user-data-count*)
  46
  47 (declaim (fixnum *user-data-count*))
  48
  49 (defvar *destroy-notify* (system:foreign-symbol-address "destroy_notify"))
  50 (defvar *user-data* (make-hash-table))
  51 (defvar *user-data-count* 0)
  52
  53 (defun register-user-data (object &optional destroy-function)
  54   (check-type destroy-function (or null symbol function))
  55   (incf *user-data-count*)
  56   (setf
  57    (gethash *user-data-count* *user-data*)
  58    (cons object destroy-function))
  59   *user-data-count*)
  60
  61 (defun find-user-data (id)
  62   (check-type id fixnum)
  63   (multiple-value-bind (user-data p) (gethash id *user-data*)
  64     (values (car user-data) p)))
  65
  66 (defun destroy-user-data (id)
  67   (check-type id fixnum)
  68   (let ((user-data (gethash id *user-data*)))
  69     (when (cdr user-data)
  70       (funcall (cdr user-data) (car user-data))))
  71   (remhash id *user-data*))
  72
  73
  74
  75 ;;;; Quarks
  76
  77 (internal *quark-counter* *quark-from-object* *quark-to-object*)
  78
  79 (deftype quark () 'unsigned)
  80
  81 ;(define-foreign %quark-get-reserved () quark)
  82
  83 (define-foreign %quark-from-string () quark
  84   (string string))
  85
  86 (defvar *quark-counter* 0)
  87
  88 (defun %quark-get-reserved ()
  89   ;; The string is just a dummy
  90   (%quark-from-string (format nil "#@£$%&-quark-~D" (incf *quark-counter*))))
  91
  92 (defvar *quark-from-object* (make-hash-table))
  93 (defvar *quark-to-object* (make-hash-table))
  94
  95 (defun quark-from-object (object &key (test #'eq))
  96   (let ((hash-code (sxhash object)))
  97     (or
  98      (assoc-ref object (gethash hash-code *quark-from-object*) :test test)
  99      (let ((quark (%quark-get-reserved)))
 100        (setf
 101         (gethash hash-code *quark-from-object*)
 102         (append
 103          (gethash hash-code *quark-from-object*)
 104          (list (cons object quark))))
 105        (setf (gethash quark *quark-to-object*) object)
 106        quark))))
 107
 108 (defun quark-to-object (quark)
 109   (gethash quark *quark-to-object*))
 110
 111 (defun remove-quark (quark)
 112   (let* ((object (gethash quark *quark-to-object*))
 113          (hash-code (sxhash object)))
 114     (remhash quark *quark-to-object*)
 115     (unless (setf
 116              (gethash hash-code *quark-from-object*)
 117              (assoc-delete object (gethash hash-code *quark-from-object*)))
 118       (remhash hash-code *quark-from-object*))))
 119
 120
 121
 122 ;;;; Linked list (GList)
 123
 124 (deftype glist (type) `(or (null (cons ,type list))))
 125
 126 (define-foreign ("g_list_append" %glist-append-unsigned) () pointer
 127   (glist pointer)
 128   (data unsigned))
 129
 130 (define-foreign ("g_list_append" %glist-append-signed) () pointer
 131   (glist pointer)
 132   (data signed))
 133
 134 (define-foreign ("g_list_append" %glist-append-sap) () pointer
 135   (glist pointer)
 136   (data pointer))
 137
 138 (defmacro glist-append (glist value type-spec)
 139   (ecase (first (mklist (translate-type-spec type-spec)))
 140     (unsigned `(%glist-append-unsigned ,glist ,value))
 141     (signed `(%glist-append-signed ,glist ,value))
 142     (system-area-pointer `(%glist-append-sap ,glist ,value))))
 143
 144 (defmacro glist-data (glist type-spec)
 145   (ecase (first (mklist (translate-type-spec type-spec)))
 146     (unsigned `(sap-ref-unsigned ,glist 0))
 147     (signed `(sap-ref-signed ,glist 0))
 148     (system-area-pointer `(sap-ref-sap ,glist 0))))
 149
 150 (defun glist-next (glist)
 151   (unless (null-pointer-p glist)
 152     (sap-ref-sap glist +size-of-sap+)))
 153
 154 (define-foreign ("g_list_free" glist-free) () nil
 155   (glist pointer))
 156
 157 (deftype-method translate-type-spec glist (type-spec)
 158   (declare (ignore type-spec))
 159   (translate-type-spec 'pointer))
 160
 161 (deftype-method size-of glist (type-spec)
 162   (declare (ignore type-spec))
 163   (size-of 'pointer))
 164
 165 (deftype-method translate-to-alien glist (type-spec list &optional copy)
 166   (declare (ignore copy))
 167   (let* ((element-type-spec (second (type-expand-to 'glist type-spec)))
 168          (to-alien (translate-to-alien element-type-spec 'element t)))
 169     `(let ((glist (make-pointer 0)))
 170        (dolist (element ,list glist)
 171          (setq glist (glist-append glist ,to-alien ,element-type-spec))))))
 172
 173 (deftype-method translate-from-alien
 174     glist (type-spec glist &optional (alloc :reference))
 175   (let ((element-type-spec (second (type-expand-to 'glist type-spec))))
 176     `(let ((glist ,glist)
 177            (list nil))
 178        (do ((tmp glist (glist-next tmp)))
 179            ((null-pointer-p tmp))
 180          (push
 181           ,(translate-from-alien
 182             element-type-spec `(glist-data tmp ,element-type-spec) alloc)
 183           list))
 184        ,(when (eq alloc :reference)
 185           '(glist-free glist))
 186        (nreverse list))))
 187
 188 (deftype-method cleanup-alien glist (type-spec glist &optional copied)
 189   (declare (ignore copied))
 190   (let* ((element-type-spec (second (type-expand-to 'glist type-spec)))
 191          (alien-type-spec (translate-type-spec element-type-spec)))
 192     `(let ((glist ,glist))
 193        (unless (null-pointer-p glist)
 194          ,(when (eq alien-type-spec 'system-area-pointer)
 195             `(do ((tmp glist (glist-next tmp)))
 196                  ((null-pointer-p tmp))
 197                ,(cleanup-alien
 198                  element-type-spec `(glist-data tmp ,element-type-spec) t)))
 199          (glist-free glist)))))
 200
 201
 202
 203 ;;;; Single linked list (GSList)
 204
 205 (deftype gslist (type) `(or (null (cons ,type list))))
 206
 207 (define-foreign ("g_slist_prepend" %gslist-prepend-unsigned) () pointer
 208   (gslist pointer)
 209   (data unsigned))
 210
 211 (define-foreign ("g_slist_prepend" %gslist-prepend-signed) () pointer
 212   (gslist pointer)
 213   (data signed))
 214
 215 (define-foreign ("g_slist_prepend" %gslist-prepend-sap) () pointer
 216   (gslist pointer)
 217   (data pointer))
 218
 219 (defmacro gslist-prepend (gslist value type-spec)
 220   (ecase (first (mklist (translate-type-spec type-spec)))
 221     (unsigned `(%gslist-prepend-unsigned ,gslist ,value))
 222     (signed `(%gslist-prepend-signed ,gslist ,value))
 223     (system-area-pointer `(%gslist-prepend-sap ,gslist ,value))))
 224
 225 (define-foreign ("g_slist_free" gslist-free) () nil
 226   (gslist pointer))
 227
 228 (deftype-method translate-type-spec gslist (type-spec)
 229   (declare (ignore type-spec))
 230   (translate-type-spec 'pointer))
 231
 232 (deftype-method size-of gslist (type-spec)
 233   (declare (ignore type-spec))
 234   (size-of 'pointer))
 235
 236 (deftype-method translate-to-alien gslist (type-spec list &optional copy)
 237   (declare (ignore copy))
 238   (let* ((element-type-spec (second (type-expand-to 'gslist type-spec)))
 239          (to-alien (translate-to-alien element-type-spec 'element t)))
 240     `(let ((gslist (make-pointer 0)))
 241        (dolist (element (reverse ,list) gslist)
 242          (setq gslist (gslist-prepend gslist ,to-alien ,element-type-spec))))))
 243
 244 (deftype-method translate-from-alien
 245     gslist (type-spec gslist &optional (alloc :reference))
 246   (let ((element-type-spec (second (type-expand-to 'gslist type-spec))))
 247     `(let ((gslist ,gslist)
 248            (list nil))
 249        (do ((tmp gslist (glist-next tmp)))
 250            ((null-pointer-p tmp))
 251          (push
 252           ,(translate-from-alien
 253             element-type-spec `(glist-data tmp ,element-type-spec) alloc)
 254           list))
 255        ,(when (eq alloc :reference)
 256           '(gslist-free gslist))
 257        (nreverse list))))
 258
 259 (deftype-method cleanup-alien gslist (type-spec gslist &optional copied)
 260   (declare (ignore copied))
 261   (let* ((element-type-spec (second (type-expand-to 'gslist type-spec)))
 262          (alien-type-spec (translate-type-spec element-type-spec)))
 263     `(let ((gslist ,gslist))
 264        (unless (null-pointer-p gslist)
 265          ,(when (eq alien-type-spec 'system-area-pointer)
 266             `(do ((tmp gslist (glist-next tmp)))
 267                  ((null-pointer-p tmp))
 268                ,(cleanup-alien
 269                  element-type-spec `(glist-data tmp ,element-type-spec) t)))
 270          (gslist-free gslist)))))
 271
 272
 273
 274 ;;; Vector
 275
 276 (deftype-method translate-type-spec vector (type-spec)
 277   (declare (ignore type-spec))
 278   (translate-type-spec 'pointer))
 279
 280 (deftype-method size-of vector (type-spec)
 281   (declare (ignore type-spec))
 282   (size-of 'pointer))
 283
 284 (deftype-method translate-to-alien vector (type-spec vector &optional copy)
 285   (declare (ignore copy))
 286   (destructuring-bind (element-type &optional (length '*))
 287       (cdr (type-expand-to 'vector type-spec))
 288     (let ((element-size (size-of element-type)))
 289       `(let ((vector ,vector))
 290          (let ((c-vector
 291                 (allocate-memory
 292                  ,(if (eq length '*)
 293                       `(* ,element-size (length vector))
 294                     (* element-size length)))))
 295            (dotimes (i ,(if (eq length '*) '(length vector) length) c-vector)
 296              (setf
 297               (,(sap-ref-fname element-type) c-vector (* i ,element-size))
 298               ,(translate-to-alien element-type '(aref vector i) :copy))))))))
 299
 300 (deftype-method translate-from-alien
 301     vector (type-spec sap &optional (alloc :reference))
 302   (destructuring-bind (element-type &optional (length '*))
 303       (cdr (type-expand-to 'vector type-spec))
 304     (when (eq length '*)
 305       (error "Can't use vectors of variable length as return type"))
 306     (let ((element-size (size-of element-type)))
 307       `(let ((sap ,sap)
 308              (vector (make-array ,length :element-type ',element-type)))
 309          (dotimes (i ,length vector)
 310            (setf
 311             (aref vector i)
 312             ,(translate-to-alien
 313               element-type
 314               `(,(sap-ref-fname element-type) sap (* i ,element-size))
 315               alloc)))))))
 316
 317
 318 (deftype-method cleanup-alien vector (type-spec sap &optional copied)
 319   (declare (ignore type-spec copied))
 320   ;; The individual elements also have to be cleaned up to avoid memory leaks,
 321   ;; but this is currently not possible because we can't always tell the
 322   ;; length of the vector
 323   `(deallocate-memory ,sap))