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

   1 ;; Common Lisp bindings for GTK+ v2.x
   2 ;; Copyright 2000-2006 Espen S. Johnsen <espen@users.sf.net>
   3 ;;
   4 ;; Permission is hereby granted, free of charge, to any person obtaining
   5 ;; a copy of this software and associated documentation files (the
   6 ;; "Software"), to deal in the Software without restriction, including
   7 ;; without limitation the rights to use, copy, modify, merge, publish,
   8 ;; distribute, sublicense, and/or sell copies of the Software, and to
   9 ;; permit persons to whom the Software is furnished to do so, subject to
  10 ;; the following conditions:
  11 ;;
  12 ;; The above copyright notice and this permission notice shall be
  13 ;; included in all copies or substantial portions of the Software.
  14 ;;
  15 ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18 ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  19 ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  20 ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  21 ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 ;; $Id: gobject.lisp,v 1.59 2008-11-04 03:22:23 espen Exp $
  24
  25 (in-package "GLIB")
  26
  27
  28 ;;;; Metaclass used for subclasses of gobject
  29
  30 (eval-when (:compile-toplevel :load-toplevel :execute)
  31 ;;   (push :debug-ref-counting *features*)
  32   (defclass gobject-class (ginstance-class)
  33     ((instance-slots-p :initform nil :reader instance-slots-p
  34       :documentation "Non NIL if the class has slots with instance allocation")))
  35
  36   (defmethod validate-superclass ((class gobject-class) (super standard-class))
  37 ;  (subtypep (class-name super) 'gobject)
  38     t))
  39
  40 (defmethod slot-unbound (metaclass (class gobject-class) (slot (eql 'ref)))
  41   (assert (class-direct-superclasses class))
  42   (setf (slot-value class 'ref)
  43    #?-(pkg-exists-p "glib-2.0" :atleast-version "2.10.0") '%object-ref
  44    #?(pkg-exists-p "glib-2.0" :atleast-version "2.10.0")
  45    ;; We do this hack instead of creating a new metaclass to avoid
  46    ;; breaking backward compatibility
  47    (if (subtypep (class-name class) 'initially-unowned)
  48        '%object-ref-sink
  49      '%object-ref)))
  50
  51 (defmethod slot-unbound (metaclass (class gobject-class) (slot (eql 'unref)))
  52   (setf (slot-value class 'unref) '%object-unref))
  53
  54
  55 (defclass direct-property-slot-definition (direct-virtual-slot-definition)
  56   ((pname :reader slot-definition-pname :initarg :pname)
  57    (readable :reader slot-readable-p :initarg :readable)
  58    (writable :reader slot-writable-p :initarg :writable)
  59    (construct-only :initarg :construct-only :reader construct-only-property-p)))
  60
  61 (defclass effective-property-slot-definition (effective-virtual-slot-definition)
  62   ((pname :reader slot-definition-pname :initarg :pname)
  63    (readable :initform t :reader slot-readable-p :initarg :readable)
  64    (writable :initform t :reader slot-writable-p :initarg :writable)
  65    (construct-only :initform nil :initarg :construct-only :reader construct-only-property-p)))
  66
  67 (defclass direct-user-data-slot-definition (direct-virtual-slot-definition)
  68   ())
  69
  70 (defclass effective-user-data-slot-definition (effective-virtual-slot-definition)
  71   ())
  72
  73
  74 (defbinding %object-ref () pointer
  75   (location pointer))
  76
  77 (defbinding %object-unref () nil
  78   (location pointer))
  79
  80 #?(pkg-exists-p "glib-2.0" :atleast-version "2.8.0")
  81 (progn
  82   (define-callback toggle-ref-callback nil
  83       ((data pointer) (location pointer) (last-ref-p boolean))
  84     (declare (ignore data))
  85     #+debug-ref-counting
  86     (if last-ref-p
  87         (format t "Object at 0x~8,'0X has no foreign references~%" (pointer-address location))
  88       (format t "Foreign reference added to object at 0x~8,'0X~%" (pointer-address location)))
  89     (if last-ref-p
  90         (cache-instance (find-cached-instance location) t)
  91       (cache-instance (find-cached-instance location) nil)))
  92
  93   (defbinding %object-add-toggle-ref (location) pointer
  94     (location pointer)
  95     (toggle-ref-callback callback)
  96     (nil null))
  97
  98   (defbinding %object-remove-toggle-ref (location) pointer
  99     (location pointer)
 100     (toggle-ref-callback callback)
 101     (nil null)))
 102
 103 #+debug-ref-counting
 104 (progn
 105   (define-callback weak-ref-callback nil ((data pointer) (location pointer))
 106     (format t "Object at 0x~8,'0X (~A) being finalized~%" (pointer-address location) (type-from-number (%type-number-of-ginstance location))))
 107
 108   (defbinding %object-weak-ref (location) pointer
 109     (location pointer)
 110     (weak-ref-callback callback)
 111     (nil null)))
 112
 113
 114 ; (defbinding object-class-install-param () nil
 115 ;   (class pointer)
 116 ;   (id unsigned-int)
 117 ;   (parameter parameter))
 118
 119 ; (defbinding object-class-find-param-spec () parameter
 120 ;   (class pointer)
 121 ;   (name string))
 122
 123 (defun signal-name-to-string (name)
 124   (substitute #\_ #\- (string-downcase (string name))))
 125
 126
 127 (defmethod direct-slot-definition-class ((class gobject-class) &rest initargs)
 128   (case (getf initargs :allocation)
 129     (:property (find-class 'direct-property-slot-definition))
 130     (:user-data (find-class 'direct-user-data-slot-definition))
 131     (t (call-next-method))))
 132
 133 (defmethod effective-slot-definition-class ((class gobject-class) &rest initargs)
 134   (case (getf initargs :allocation)
 135     (:property (find-class 'effective-property-slot-definition))
 136     (:user-data (find-class 'effective-user-data-slot-definition))
 137     (t (call-next-method))))
 138
 139 (defmethod compute-effective-slot-definition-initargs ((class gobject-class) direct-slotds)
 140   (if (eq (slot-definition-allocation (first direct-slotds)) :property)
 141       (nconc
 142        (compute-most-specific-initargs direct-slotds
 143         '(pname construct-only readable writable))
 144        (call-next-method))
 145     (call-next-method)))
 146
 147
 148 (defvar *ignore-setting-construct-only-property* nil)
 149 (declaim (special *ignore-setting-construct-only-property*))
 150
 151 (defmethod compute-slot-reader-function ((slotd effective-property-slot-definition) &optional signal-unbound-p)
 152   (declare (ignore signal-unbound-p))
 153   (let* ((type (slot-definition-type slotd))
 154          (pname (slot-definition-pname slotd))
 155          (get-reader (reader-function type :ref :get))
 156          (peek-reader (reader-function type :ref :peek)))
 157     #'(lambda (object)
 158         (with-memory (gvalue +gvalue-size+)
 159           (%gvalue-init gvalue (find-type-number type))
 160           (%object-get-property object pname gvalue)
 161           (if (gvalue-static-p gvalue)
 162               (funcall peek-reader gvalue +gvalue-value-offset+)
 163             (funcall get-reader gvalue +gvalue-value-offset+))))))
 164
 165 (defmethod compute-slot-writer-function :around ((slotd effective-property-slot-definition))
 166   (if (construct-only-property-p slotd)
 167       #'(lambda (value object)
 168           (declare (ignore value))
 169           (unless *ignore-setting-construct-only-property*
 170             (error 'unwritable-slot :name (slot-definition-name slotd) :instance object)))
 171     (call-next-method)))
 172
 173 (defmethod compute-slot-writer-function ((slotd effective-property-slot-definition))
 174   (let* ((type (slot-definition-type slotd))
 175          (pname (slot-definition-pname slotd))
 176          (writer (writer-function type :temp t))
 177          (destroy (destroy-function type :temp t)))
 178     #'(lambda (value object)
 179         (with-memory (gvalue +gvalue-size+)
 180           (%gvalue-init gvalue (find-type-number type))
 181           (funcall writer value gvalue +gvalue-value-offset+)
 182           (%object-set-property object pname gvalue)
 183           (funcall destroy gvalue +gvalue-value-offset+))
 184         value)))
 185
 186 (defmethod slot-readable-p ((slotd effective-user-data-slot-definition))
 187   (declare (ignore slotd))
 188   t)
 189
 190 (defmethod compute-slot-reader-function ((slotd effective-user-data-slot-definition) &optional signal-unbound-p)
 191   (declare (ignore signal-unbound-p))
 192   (let ((slot-name (slot-definition-name slotd)))
 193     #'(lambda (object)
 194         (user-data object slot-name))))
 195
 196 (defmethod compute-slot-boundp-function ((slotd effective-user-data-slot-definition))
 197   (let ((slot-name (slot-definition-name slotd)))
 198     #'(lambda (object)
 199         (user-data-p object slot-name))))
 200
 201 (defmethod slot-writable-p ((slotd effective-user-data-slot-definition))
 202   (declare (ignore slotd))
 203   t)
 204
 205 (defmethod compute-slot-writer-function ((slotd effective-user-data-slot-definition))
 206   (let ((slot-name (slot-definition-name slotd)))
 207     #'(lambda (value object)
 208         (setf (user-data object slot-name) value))))
 209
 210 (defmethod compute-slot-makunbound-function ((slotd effective-user-data-slot-definition))
 211   (let ((slot-name (slot-definition-name slotd)))
 212     #'(lambda (object)
 213         (unset-user-data object slot-name))))
 214
 215 (defmethod compute-slots :around ((class gobject-class))
 216   (let ((slots (call-next-method)))
 217     (when (some #'(lambda (slotd)
 218                     (and
 219                      (eq (slot-definition-allocation slotd) :instance)
 220                      (not (typep slotd 'effective-special-slot-definition))))
 221                 slots)
 222       (setf (slot-value class 'instance-slots-p) t))
 223     slots))
 224
 225
 226 ;;;; Super class for all classes in the GObject type hierarchy
 227
 228 (eval-when (:compile-toplevel :load-toplevel :execute)
 229   (defclass gobject (ginstance)
 230     (#+debug-ref-counting
 231      (ref-count :allocation :alien :type int :reader ref-count))
 232     (:metaclass gobject-class)
 233     (:gtype "GObject")))
 234
 235 #+debug-ref-counting
 236 (defmethod print-object ((instance gobject) stream)
 237   (print-unreadable-object (instance stream :type t :identity nil)
 238     (if (proxy-valid-p instance)
 239         (format stream "at 0x~X (~D)" (pointer-address (foreign-location instance)) (ref-count instance))
 240       (write-string "at \"unbound\"" stream))))
 241
 242
 243 (define-type-method reader-function ((type gobject) &key (ref :read) inlined)
 244   (assert-not-inlined type inlined)
 245   (ecase ref
 246     ((:read :peek) (call-next-method type :ref :read))
 247     (:get
 248      #'(lambda (location &optional (offset 0))
 249          (let ((instance (ref-pointer location offset)))
 250            (unless (null-pointer-p instance)
 251              (multiple-value-bind (gobject new-p)
 252                  (ensure-proxy-instance 'gobject instance :reference nil)
 253                (unless new-p
 254                  (%object-unref instance))
 255                (setf (ref-pointer location offset) (make-pointer 0))
 256                gobject)))))))
 257
 258 (define-type-method callback-wrapper ((type gobject) var arg form)
 259   (let ((class (type-expand type)))
 260     `(let ((,var (ensure-proxy-instance ',class ,arg)))
 261        ,form)))
 262
 263 (defun initial-add (object function initargs key pkey)
 264   (loop
 265    as (initarg value . rest) = initargs then rest
 266    do (cond
 267        ((eq initarg key) (funcall function object value))
 268        ((eq initarg pkey) (mapc #'(lambda (value)
 269                                     (funcall function object value))
 270                                 value)))
 271        while rest))
 272
 273 (defun initial-apply-add (object function initargs key pkey)
 274   (initial-add object #'(lambda (object value)
 275                           (apply function object (mklist value)))
 276                initargs key pkey))
 277
 278
 279 (defmethod make-proxy-instance ((class gobject-class) location &rest initargs)
 280   (declare (ignore location initargs))
 281   (if (slot-value class 'instance-slots-p)
 282       (error "Objects of class ~A has instance slots and should only be created with MAKE-INSTANCE" class)
 283     (call-next-method)))
 284
 285 (defparameter +gparameter-gvalue-offset+
 286   (max (size-of 'pointer) (type-alignment '(unsigned-byte 64))))
 287 (defparameter +gparameter-size+
 288   (+ +gparameter-gvalue-offset+ +gvalue-size+))
 289
 290 (defmethod allocate-foreign ((object gobject) &rest initargs)
 291   (let ((init-slots ()))
 292     (flet ((value-from-initargs (slotd)
 293              (loop
 294               with slot-initargs = (slot-definition-initargs slotd)
 295               for (initarg value) on initargs by #'cddr
 296               when (find initarg slot-initargs)
 297               do (return (values value t)))))
 298
 299     (loop
 300      for slotd in (class-slots (class-of object))
 301      when (and
 302            (eq (slot-definition-allocation slotd) :property)
 303            (construct-only-property-p slotd))
 304      do (multiple-value-bind (value initarg-p) (value-from-initargs slotd)
 305           (cond
 306            (initarg-p (push (cons slotd value) init-slots))
 307            ((slot-definition-initfunction slotd)
 308             (push
 309              (cons slotd (funcall (slot-definition-initfunction slotd)))
 310              init-slots))))))
 311
 312     (cond
 313      (init-slots
 314       (let* ((num-slots (length init-slots)))
 315         (with-memory (params (* num-slots +gparameter-size+))
 316           (loop
 317            with string-writer = (writer-function 'string)
 318            for (slotd . value) in init-slots
 319            as param = params then (pointer+ param +gparameter-size+)
 320            as type = (slot-definition-type slotd)
 321            as pname = (slot-definition-pname slotd)
 322            do (funcall string-writer pname param)
 323               (gvalue-init
 324                (pointer+ param +gparameter-gvalue-offset+) type value))
 325
 326           (unwind-protect
 327               (%gobject-newv (type-number-of object) num-slots params)
 328
 329             (loop
 330              with string-destroy = (destroy-function 'string)
 331              repeat num-slots
 332              as param = params then (pointer+ param +gparameter-size+)
 333              do (funcall string-destroy param)
 334                 (gvalue-unset (pointer+ param +gparameter-gvalue-offset+)))))))
 335
 336      (t (%gobject-new (type-number-of object))))))
 337
 338
 339 (defmethod shared-initialize ((object gobject) names &rest initargs)
 340   (declare (ignore names initargs))
 341   (let ((*ignore-setting-construct-only-property* t))
 342     (call-next-method)))
 343
 344 (defmethod initialize-instance :around ((object gobject) &rest initargs)
 345   (declare (ignore initargs))
 346   (prog1
 347       (call-next-method)
 348     (let ((location (foreign-location object)))
 349       #+debug-ref-counting(%object-weak-ref location)
 350       #?(pkg-exists-p "glib-2.0" :atleast-version "2.8.0")
 351       (when (slot-value (class-of object) 'instance-slots-p)
 352         (%object-add-toggle-ref location)
 353         (%object-unref location)))))
 354
 355
 356 (defmethod instance-finalizer ((instance gobject))
 357   (let ((location (foreign-location instance)))
 358     #?(pkg-exists-p "glib-2.0" :atleast-version "2.8.0")
 359     (if (slot-value (class-of instance) 'instance-slots-p)
 360         #'(lambda ()
 361             #+debug-ref-counting
 362             (format t "Finalizing proxy for 0x~8,'0X (~A)~%"
 363              (pointer-address location)
 364              (find-foreign-type-name (%type-number-of-ginstance location)))
 365             (%object-remove-toggle-ref location))
 366       #'(lambda ()
 367           #+debug-ref-counting
 368           (format t "Finalizing proxy for 0x~8,'0X (~A)~%"
 369            (pointer-address location)
 370            (find-foreign-type-name (%type-number-of-ginstance location)))
 371           (%object-unref location)))
 372     #?-(pkg-exists-p "glib-2.0" :atleast-version "2.8.0")
 373     #'(lambda ()
 374         (%object-unref location))))
 375
 376
 377 (defbinding (%gobject-new "g_object_new") () pointer
 378   (type type-number)
 379   (nil null))
 380
 381 (defbinding (%gobject-newv "g_object_newv") () pointer
 382   (type type-number)
 383   (n-parameters unsigned-int)
 384   (params pointer))
 385
 386
 387 ;;;; Floating references
 388
 389 #?(pkg-exists-p "glib-2.0" :atleast-version "2.10.0")
 390 (progn
 391   (defclass initially-unowned (gobject)
 392     ()
 393     (:metaclass gobject-class)
 394     (:gtype "GInitiallyUnowned"))
 395
 396   (defbinding %object-ref-sink () pointer
 397     (location pointer))
 398
 399   (defbinding %object-is-floating () boolean
 400     (location pointer))
 401
 402   (defmethod initialize-instance :before ((object initially-unowned) &rest initargs)
 403     (declare (ignore initargs))
 404     (%object-ref-sink (foreign-location object))))
 405
 406
 407 ;;;; Property stuff
 408
 409 (defbinding %object-set-property () nil
 410   (object gobject)
 411   (name string)
 412   (value gvalue))
 413
 414 (defbinding %object-get-property () nil
 415   (object gobject)
 416   (name string)
 417   (value gvalue))
 418
 419 (defbinding %object-notify () nil
 420   (object gobject)
 421   (name string))
 422
 423 (defbinding object-freeze-notify () nil
 424   (object gobject))
 425
 426 (defbinding object-thaw-notify () nil
 427   (object gobject))
 428
 429
 430 ;;;; User data
 431
 432 (defgeneric (setf user-data) (data object key))
 433 (defgeneric user-data (object key))
 434 (defgeneric user-data-p (object key))
 435 (defgeneric unset-user-data (object key))
 436
 437 (defbinding %object-set-qdata-full () nil
 438   (object gobject)
 439   (id quark)
 440   (data pointer-data)
 441   (destroy-marshal callback))
 442
 443 (define-callback user-data-destroy-callback nil ((id pointer-data))
 444   (destroy-user-data id))
 445
 446 (defmethod (setf user-data) (data (object gobject) key)
 447   (%object-set-qdata-full object (quark-intern key)
 448    (register-user-data data) user-data-destroy-callback)
 449   data)
 450
 451 (defbinding %object-get-qdata () pointer-data
 452   (object gobject)
 453   (id quark))
 454
 455 (defmethod user-data ((object gobject) key)
 456   (find-user-data (%object-get-qdata object (quark-intern key))))
 457
 458 (defmethod user-data-p ((object gobject) key)
 459   (user-data-exists-p (%object-get-qdata object (quark-intern key))))
 460
 461 (defbinding %object-steal-qdata () pointer-data
 462   (object gobject)
 463   (id quark))
 464
 465 (defmethod unset-user-data ((object gobject) key)
 466   (destroy-user-data (%object-steal-qdata object (quark-intern key))))
 467
 468
 469 ;;;;
 470
 471 (defbinding %object-class-list-properties () pointer
 472   (class pointer)
 473   (n-properties unsigned-int :out))
 474
 475
 476 (defun %map-params (params length type inherited-p)
 477   (if inherited-p
 478       (map-c-vector 'list #'identity params 'param length)
 479     (let ((properties ()))
 480       (map-c-vector 'list
 481        #'(lambda (param)
 482            (when (eql (param-owner-type param) type)
 483              (push param properties)))
 484        params 'param length)
 485       (nreverse properties))))
 486
 487 (defun query-object-class-properties (type &optional inherited-p)
 488   (let* ((type-number (find-type-number type t))
 489          (class (type-class-ref type-number)))
 490     (unwind-protect
 491          (multiple-value-bind (array length)
 492              (%object-class-list-properties class)
 493            (unless (null-pointer-p array)
 494              (unwind-protect
 495                  (%map-params array length type-number inherited-p)
 496                (deallocate-memory array))))
 497 ;      (type-class-unref type-number)
 498       )))
 499
 500
 501 (defun default-slot-name (name)
 502   (let ((prefix-len (length (package-prefix))))
 503     (intern (substitute #\- #\_
 504              (string-upcase
 505               (if (and
 506                    (string-prefix-p (package-prefix) name)
 507                    (char= #\- (char name prefix-len)))
 508                   (subseq name (1+ prefix-len))
 509                 name))))))
 510
 511 (defun default-slot-accessor (class-name slot-name type)
 512   (intern
 513    (format
 514     nil "~A-~A~A" class-name slot-name
 515     (if (eq type 'boolean) "-P" ""))))
 516
 517
 518 (defun slot-definition-from-property (class property &optional slot-name args)
 519   (with-slots (name flags value-type documentation) property
 520     (let* ((slot-name (or slot-name (default-slot-name name)))
 521            (slot-type (or (getf args :type) (type-from-number value-type) 'pointer))
 522            (accessor (default-slot-accessor class slot-name slot-type)))
 523
 524       `(,slot-name
 525         :allocation :property :pname ,name
 526
 527         ,@(when (find :unbound args) (list :unbound (getf args :unbound)))
 528         ,@(when (find :getter args) (list :getter (getf args :getter)))
 529         ,@(when (find :setter args) (list :setter (getf args :setter)))
 530
 531         ;; accessors
 532         ,@(cond
 533            ((and
 534              (member :writable flags) (member :readable flags)
 535              (not (member :construct-only flags)))
 536             (list :accessor accessor))
 537            ((and (member :writable flags) (not (member :construct-only flags)))
 538             (list :writer `(setf ,accessor)))
 539            ((member :readable flags)
 540             (list :reader accessor)))
 541
 542         ;; readable/writable/construct
 543         ,@(when (or (not (member :writable flags))
 544                     (member :construct-only flags))
 545             '(:writable nil))
 546         ,@(when (not (member :readable flags))
 547             '(:readable nil))
 548         ,@(when (member :construct-only flags)
 549             '(:construct-only t))
 550
 551         ;; initargs
 552         ,@(if (find :initarg args)
 553               (let ((initarg (getf args :initarg)))
 554                 (etypecase initarg
 555                   (null ())
 556                   (symbol `(:initarg ,initarg))))
 557             (when (or (member :construct flags)
 558                       (member :construct-only flags)
 559                       (member :writable flags))
 560               (list :initarg (intern (string slot-name) "KEYWORD"))))
 561
 562         :type ,slot-type
 563         :documentation ,documentation))))
 564
 565
 566 (defun slot-definitions (class properties slots)
 567   (loop
 568    for property in properties
 569    as slot = (or
 570               (find (param-name property) slots
 571                :key #'(lambda (slot) (getf (rest slot) :pname))
 572                :test #'string=)
 573               (find (param-name property) slots
 574                :key #'first :test #'string-equal))
 575    do (cond
 576        ((not slot)
 577         (push (slot-definition-from-property class property) slots))
 578        ((getf (rest slot) :merge)
 579         (setf
 580          (rest slot)
 581          (rest (slot-definition-from-property class property (first slot) (rest slot)))))))
 582   (delete-if #'(lambda (slot) (getf (rest slot) :ignore)) slots))
 583
 584
 585 (defun expand-gobject-type (type forward-p options &optional (metaclass 'gobject-class))
 586   (let ((supers (cons (supertype type) (implements type)))
 587         (class  (type-from-number type))
 588         (slots (getf options :slots)))
 589     `(defclass ,class ,supers
 590          ,(unless forward-p
 591             (slot-definitions class (query-object-class-properties type) slots))
 592          (:metaclass ,metaclass)
 593          (:gtype ,(register-type-as type)))))
 594
 595 (defun gobject-dependencies (type options)
 596   (delete-duplicates
 597    (cons
 598     (supertype type)
 599     (append
 600      (type-interfaces type)
 601      (mapcar #'param-value-type (query-object-class-properties type))
 602      (getf options :dependencies)
 603      (loop
 604       for slot in (getf options :slots)
 605       as type = (getf (rest slot) :type)
 606       when (and type (symbolp type) (find-type-number type))
 607       collect (find-type-number type))))))
 608
 609
 610 (register-derivable-type 'gobject "GObject" 'expand-gobject-type 'gobject-dependencies)
 611
 612
 613 ;;; Pseudo type for gobject instances which have their reference count
 614 ;;; increased by the returning function
 615
 616 (deftype referenced (type) type)
 617
 618 (define-type-method from-alien-form ((type referenced) form &key (ref :free))
 619   (cond
 620    ((not (eq ref :free))
 621     (error "Keyword arg :REF to FROM-ALIEN-FORM should be :FREE for type ~A. It was give ~A" type ref))
 622    ((subtypep type 'gobject)
 623     (from-alien-form (second (type-expand-to 'referenced type)) form :ref ref))))
 624
 625 (define-type-method from-alien-function ((type referenced) &key (ref :free))
 626   (cond
 627    ((not (eq ref :free))
 628     (error "Keyword arg :REF to FROM-ALIEN-FUNCTION should be :FREE for type ~A. It was give ~A" type ref))
 629 ;   ((subtypep type 'gobject) (call-next-method type ref :free))))
 630    ((subtypep type 'gobject)
 631     (from-alien-function (second (type-expand-to 'referenced type)) :ref ref))))