X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/clg/blobdiff_plain/7479d92c2e0ee576d0d376bbbbb72a9dcb948e4b..4769576f381e72d2bc169a23e33b1c897f59e6e7:/glib/gtype.lisp

diff --git a/glib/gtype.lisp b/glib/gtype.lisp
index 9cd2319..add9c8e 100644
--- a/glib/gtype.lisp
+++ b/glib/gtype.lisp
@@ -1,57 +1,95 @@
-;; Common Lisp bindings for GTK+ v2.0
-;; Copyright (C) 2000 Espen S. Johnsen <esj@stud.cs.uit.no>
+;; Common Lisp bindings for GTK+ v2.x
+;; Copyright 2000-2006 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: gtype.lisp,v 1.9 2001-04-30 11:25:25 espen Exp $
+;; $Id: gtype.lisp,v 1.69 2009-02-10 15:16:34 espen Exp $
 
 (in-package "GLIB")
 
 (use-prefix "g")
 
+;; Initialize the glib type system
+(defbinding type-init () nil)
+(type-init)
 
-;;;; 
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (defbinding (bitsize-of-gtype "bitsize_of_gtype") () unsigned-int))
 
-(deftype type-number () '(unsigned 32))
+(deftype type-number () `(unsigned-byte ,(bitsize-of-gtype)))
 
-(eval-when (:compile-toplevel :load-toplevel :execute)
-  (defclass type-query (alien-structure)
-    ((type-number :allocation :alien :type type-number)
-     (name :allocation :alien :type string)
-     (class-size :allocation :alien :type unsigned-int)
-     (instance-size :allocation :alien :type unsigned-int))
-    (:metaclass proxy-class)))
+(deftype gtype () 'symbol)
 
+(define-type-method alien-type ((type gtype))
+  (declare (ignore type))
+  (alien-type 'type-number))
 
-(defbinding ("g_type_name" alien-type-name) (type) (static string)
-  ((find-type-number type) type-number))
+(define-type-method size-of ((type gtype) &key (inlined t))
+  (assert-inlined type inlined)
+  (size-of 'type-number))
 
-(defbinding %type-from-name () type-number
-  (name string))
+(define-type-method to-alien-form ((type gtype) gtype &optional copy-p)
+  (declare (ignore type copy-p))
+  `(find-type-number ,gtype t)) 
+
+(define-type-method to-alien-function ((type gtype) &optional copy-p)
+  (declare (ignore type copy-p))
+  #'(lambda (gtype)
+      (find-type-number gtype t)))
+
+(define-type-method from-alien-form ((type gtype) form &key ref)
+  (declare (ignore type ref))
+  `(type-from-number ,form))
+
+(define-type-method from-alien-function ((type gtype) &key ref)
+  (declare (ignore type ref))
+  #'(lambda (type-number)
+      (type-from-number type-number)))
 
-(defbinding type-parent () type-number
-  (type type-number))
+(define-type-method writer-function ((type gtype) &key temp (inlined t))
+  (declare (ignore temp))
+  (assert-inlined type inlined)
+  (let ((writer (writer-function 'type-number)))
+    #'(lambda (gtype location &optional (offset 0))
+	(funcall writer (find-type-number gtype t) location offset))))
 
-(defbinding %type-query () nil
-  (type type-number)
-  (query type-query))
+(define-type-method reader-function ((type gtype) &key ref (inlined t))
+  (declare (ignore ref))
+  (assert-inlined type inlined)
+  (let ((reader (reader-function 'type-number)))
+    #'(lambda (location &optional (offset 0))
+	(type-from-number (funcall reader location offset)))))
 
-(defun type-query (type)
-  (let ((query (make-instance 'type-query)))
-    (%type-query (find-type-number type) query)
-    query))
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (defclass type-query (struct)
+    ((type-number :allocation :alien :type type-number)
+     (name :allocation :alien :type (copy-of string))
+     (class-size :allocation :alien :type unsigned-int)
+     (instance-size :allocation :alien :type unsigned-int))
+    (:metaclass struct-class)))
+
+
+(defbinding type-query (type) nil
+  ((find-type-number type t) type-number)
+  ((make-instance 'type-query) type-query :in/return))
 
 (defun type-instance-size (type)
   (slot-value (type-query type) 'instance-size))
@@ -59,187 +97,597 @@ (defun type-instance-size (type)
 (defun type-class-size (type)
   (slot-value (type-query type) 'class-size))
 
-(defbinding type-class-ref () pointer
-  (type type-number))
+(defbinding type-class-ref (type) pointer
+  ((find-type-number type t) type-number))
 
 (defbinding type-class-unref () nil
-  (type type-number))
-
-(defbinding type-class-peek () pointer
-  (type type-number))
+  (class pointer))
 
-(defbinding type-create-instance (type) pointer
-  ((find-type-number type) type-number))
+(defbinding type-class-peek (type) pointer
+  ((find-type-number type t) type-number))
 
-(defbinding type-free-instance () nil
-  (instance pointer))
 
 
-(defvar *type-to-number-hash* (make-hash-table))
-(defvar *number-to-type-hash* (make-hash-table))
+;;;; Mapping between lisp types and glib types
 
-(defun type-number-from-alien-name (name &optional (error t))
-  (if (string= name "invalid")
-      0
-    (let ((type-number (%type-from-name name)))
-      (cond
-       ((and (zerop type-number) error)
-	(error "Invalid alien type name: ~A" name))
-       ((zerop type-number) nil)
-       (t type-number)))))
+(defvar *registered-types* ())
+(defvar *registered-type-aliases* ())
+(defvar *registered-static-types* ())
+(defvar *lisp-type-to-type-number* (make-hash-table))
+(defvar *type-number-to-lisp-type* (make-hash-table))
 
-(defun (setf alien-type-name) (alien-name type)
-  (let ((type-name (ensure-type-name type))
-	(type-number (type-number-from-alien-name alien-name)))
-    (setf (gethash type-number *number-to-type-hash*) type-name)
-    (setf (gethash type-name *type-to-number-hash*) type-number)))
-
-(defun (setf find-type-number) (type-number type)
-  (setf (gethash (ensure-type-name type) *type-to-number-hash*) type-number))
+(defbinding %type-from-name () type-number
+  (name string))
 
-(defun find-type-number (type)
+(defun type-number-from-glib-name (name &optional (error-p t))
+  (let ((type-number (%type-from-name name)))
+    (cond
+     ((not (zerop type-number)) type-number)
+     (error-p (error "Invalid gtype name: ~A" name)))))
+
+(defun type-from-glib-name (name)
+  (type-from-number (type-number-from-glib-name name) t))
+
+(defun type-registered-p (type)
+  (nth-value 1 (gethash type *lisp-type-to-type-number*)))
+
+(defun register-type (type id &optional (error-p t))
+  (cond
+   ((type-registered-p type) (find-type-number type))
+   ((not id) (warn "Can't register type with no foreign id: ~A" type))
+   (t    
+    (pushnew (cons type id) *registered-types* :key #'car)
+    (let ((type-number 
+	   (typecase id
+	     (string (type-number-from-glib-name id error-p))
+	     (symbol (funcall id)))))
+      (setf (gethash type *lisp-type-to-type-number*) type-number)
+      (setf (gethash type-number *type-number-to-lisp-type*) type)
+      type-number))))
+
+(defun register-type-alias (type alias)
+  (pushnew (cons type alias) *registered-type-aliases* :key #'car)
+  (setf 
+   (gethash type *lisp-type-to-type-number*)
+   (find-type-number alias t)))
+
+(defun reinitialize-all-types ()
+  (clrhash *lisp-type-to-type-number*)
+  (clrhash *type-number-to-lisp-type*)
+  (type-init) ; initialize the glib type system
+  (mapc #'(lambda (type) 
+	    (register-type (car type) (cdr type) nil))
+	*registered-types*)
+  (mapc #'(lambda (type) 
+	    (apply #'register-new-type type))
+	(reverse *registered-static-types*))
+  (mapc #'(lambda (type) 
+	    (register-type-alias (car type) (cdr type)))
+	*registered-type-aliases*))
+
+#+cmu
+(asdf:install-init-hook 'system::reinitialize-global-table 
+ *after-save-initializations*) ; we shouldn't need to do this?
+(asdf:install-init-hook 'reinitialize-all-types)
+
+
+
+(defun find-type-number (type &optional error-p)
   (etypecase type
     (integer type)
-    (symbol (gethash type *type-to-number-hash*))
-    (pcl::class (gethash (class-name type) *type-to-number-hash*))))
+    (string (type-number-from-glib-name type error-p))
+    (symbol
+     (or
+      (gethash type *lisp-type-to-type-number*)
+      (let ((class (find-class type nil)))
+	(when (and class (not (class-finalized-p class)))
+	  (finalize-inheritance class)
+	  (gethash type *lisp-type-to-type-number*)))
+      (and error-p (error "Type not registered: ~A" type))))
+    (class 
+     (find-type-number (class-name type) error-p))))
  
-(defun type-from-number (type-number)
-  (gethash type-number *number-to-type-hash*))
+(defun type-from-number (type-number &optional error)
+  (multiple-value-bind (type found)
+      (gethash type-number *type-number-to-lisp-type*)
+    (if found
+	type
+      (let ((name (find-foreign-type-name type-number)))
+	(cond
+	 ((and name (not (= (type-number-from-glib-name name nil) type-number)))
+	  ;; This is a hack because GdkEvent seems to be registered
+	  ;; multiple times
+	  (type-from-number (type-number-from-glib-name name)))
+	 ((and error name)
+	  (error "Type number not registered: ~A (~A)" type-number name))
+	 ((and error)
+	  (error "Invalid type number: ~A" type-number)))))))
+
+(defbinding (find-foreign-type-name "g_type_name") (type) (copy-of string)
+  ((find-type-number type t) type-number))
 
 (defun type-number-of (object)
-  (find-type-number (type-of object)))
+  (find-type-number (type-of object) t))
 
-(defun type-init (name &optional init-fname)
-  (funcall
-   (mkbinding
-    (or init-fname (default-alien-fname (format nil "~A_get_type" name)))
-    'type-number)))
+;; For #+(SBCL WIN32):
+;;   The first 2 lines of the output from "pexports" are:
+;;   LIBRARY XXX.dll
+;;   EXPORTS
+;;   We don't do anything to skip these 2 lines because they won't pass the
+;;   WHEN (AND ...) in the LOOP
+;;   - cph 19-May-2007
 
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (defvar *type-initializers* ())
+
+  (defun library-filename (system library)
+  (let ((component (asdf:find-component (asdf:find-system system) library)))
+    (etypecase component
+      (asdf:shared-object 
+       (first (asdf:output-files (make-instance 'asdf:compile-op) component)))
+      (asdf:library (asdf:component-pathname component)))))
+
+  (defun %find-types-in-library (pathname prefixes ignore)
+    (let ((outname (tmpname "types")))
+      (unwind-protect
+	  (let ((asdf::*verbose-out* nil))
+	    #-win32
+	    (asdf:run-shell-command "nm ~A ~A > ~A"
+	     #-darwin "--defined-only --dynamic --extern-only"
+	     #+darwin "-f -s __TEXT __text"
+	     (namestring (truename pathname)) outname)
+	    ;; Note about win32 port:
+	    ;;   1. (TRUENAME PATHNAME) will bomb.
+	    ;;   2. either
+	    ;;        pexports "d:\\whatever\\bin\\zlib1.dll"
+	    ;;      or
+	    ;;        pexports d:/whatever/bin/zlib1.dll
+	    ;;      anything else will bomb.  this is why ~S is used below.
+	    #+win32
+	    (asdf:run-shell-command "pexports ~S > ~A" 
+	     (namestring pathname) outname)
+
+	    (with-open-file (output outname)
+	      (loop 
+	       as line = (read-line output nil)
+	       as symbol = (when line
+			     #-win32
+			     (let ((pos (position #\space line :from-end t)))
+			       #-darwin(subseq line (1+ pos))
+			       #+darwin
+			       (when (char= (char line (1- pos)) #\T)
+				 (subseq line (+ pos 2))))
+			     #+win32
+			     (subseq line 0 (1- (length line))))
+	       while line
+	       when (and
+		     symbol (> (length symbol) 9)
+		     (not (char= (char symbol 0) #\_))
+		     (or 
+		      (not prefixes)
+		      (some #'(lambda (prefix)
+				(and
+				 (> (length symbol) (length prefix))
+				 (string= prefix symbol :end2 (length prefix))))
+		       (mklist prefixes)))
+		     (string= "_get_type" symbol :start2 (- (length symbol) 9))
+		     (not (member symbol ignore :test #'string=)))
+	       collect symbol)))
+	(delete-file outname)))))
+
+
+(defun car-eq-p (ob1 ob2)
+  (eq (car ob1) (car ob2)))
+
+(defmacro init-types-in-library (system library &key prefix ignore)
+  (let* ((filename (library-filename system library))
+	 (names (%find-types-in-library filename prefix ignore)))
+    `(progn
+       ,@(mapcar 
+	  #'(lambda (name)	      
+	      `(progn
+		 (defbinding (,(intern name) ,name) () type-number)
+		 (,(intern name))
+		 (pushnew (cons ',(intern name) ,filename) *type-initializers* 
+		  :test #'car-eq-p)))
+	  names))))
+
+(defun find-type-init-function (type-number)
+  (loop
+   for (type-init) in *type-initializers*
+   when (= type-number (funcall type-init))
+   do (return type-init)))
+
+(defun register-type-as (type-number)
+  (or 
+   (find-type-init-function type-number)
+   (find-foreign-type-name type-number)
+   (error "Unknown type-number: ~A" type-number)))
+
+(defun default-type-init-name (type)
+  (find-symbol (format nil "~A_~A_get_type" 
+		(package-prefix *package*)
+		(substitute #\_ #\- (string-downcase type)))))
 
-;;;; Superclass for wrapping types in the glib type system
 
 (eval-when (:compile-toplevel :load-toplevel :execute)
-  (defclass ginstance (proxy)
-    ()
-    (:metaclass proxy-class)
-    (:size 4 #|(size-of 'pointer|#)))
-
-(defmethod initialize-proxy ((instance ginstance) &rest initargs &key location)
-  (declare (ignore initargs))
-  (setf 
-   (slot-value instance 'location)
-   (funcall (ginstance-class-ref (class-of instance)) location))
-  (call-next-method))
-
-(defmethod instance-finalizer ((instance ginstance))
-  (let ((location (proxy-location instance))
-	(unref (ginstance-class-unref (class-of instance))))
-    (declare (type system-area-pointer location))
-    #'(lambda ()
-	(funcall unref location)
-	(remove-cached-instance location))))
-
-(defun %type-of-ginstance (location)
-  (let ((class (sap-ref-sap location 0)))
-    (type-from-number (sap-ref-unsigned class 0))))
-
-(deftype-method translate-from-alien
-    ginstance (type-spec location &optional weak-ref)
-  (declare (ignore type-spec))
-  `(let ((location ,location))
-     (unless (null-pointer-p location)
-       (ensure-proxy-instance
-	(%type-of-ginstance location) location ,weak-ref))))
-
-(deftype-method translate-to-alien
-    ginstance (type-spec object &optional weak-ref)
-  (declare (ignore type-spec))
-  (if weak-ref
-      `(proxy-location ,object)
-    `(let ((object ,object))
-       (funcall
-	(ginstance-class-ref (class-of object)) (proxy-location object)))))
-
-(deftype-method unreference-alien ginstance (type-spec location)
-  (declare (ignore type-spec))
-  `(let* ((location ,location)
-	  (class (find-class (%type-of-ginstance location))))
-     (funcall (ginstance-class-unref class) location)))
+  (defclass type-info (struct)
+    ((class-size :allocation :alien :type (unsigned 16) :initarg :class-size)
+     (base-init :allocation :alien :type pointer)
+     (base-finalize :allocation :alien :type pointer)
+     (class-init :allocation :alien :type pointer)
+     (class-finalize :allocation :alien :type pointer)
+     (class-data :allocation :alien :type pointer)
+     (instance-size :allocation :alien :type (unsigned 16) 
+		    :initarg :instance-size)
+     (n-preallocs :allocation :alien :type (unsigned 16))
+     (instance-init :allocation :alien :type pointer)
+     (value-table :allocation :alien :type pointer))
+    (:metaclass struct-class)))
+
+(defbinding %type-register-static () type-number
+  (parent-type type-number)
+  (name string)
+  (info type-info)
+  (0 unsigned-int))
+
+(defun register-new-type (type parent &optional foreign-name)
+  (let ((parent-info (type-query parent)))
+    (with-slots ((parent-number type-number) class-size instance-size) parent-info
+      (let ((type-number 
+	     (%type-register-static 
+	      parent-number
+	      (or foreign-name (default-alien-type-name type))
+	      (make-instance 'type-info :class-size class-size :instance-size instance-size))))
+	(pushnew (list type parent foreign-name) *registered-static-types* :key #'car)
+	(setf (gethash type *lisp-type-to-type-number*) type-number)
+	(setf (gethash type-number *type-number-to-lisp-type*) type)
+	type-number))))
 
 
 
 ;;;; Metaclass for subclasses of ginstance
 
+(defvar *referenced-ginstance-classes* ())
+
 (eval-when (:compile-toplevel :load-toplevel :execute)
   (defclass ginstance-class (proxy-class)
-    ((ref :reader ginstance-class-ref)
-     (unref :reader ginstance-class-unref))))
-
-
-(defmethod shared-initialize ((class ginstance-class) names
-			      &rest initargs
-			      &key name alien-name size
-			      ref unref type-init)
-  (declare (ignore initargs names))
+    ((gtype :initarg :gtype :initform nil :reader ginstance-class-gtype))))
+
+
+(defun update-size (class)
+  (let ((type-number (find-type-number class)))
+    (cond
+     ((not (foreign-size-p class))
+      (setf (foreign-size class) (type-instance-size type-number)))
+     ((and 
+       (foreign-size-p class)
+       (not (= (type-instance-size type-number) (foreign-size class))))
+      (warn "Size mismatch for class ~A" class)))))
+
+
+(defmethod finalize-inheritance ((class ginstance-class))
+  (prog1
+      #+clisp(call-next-method)
+    (let* ((class-name (class-name class))
+	   (super (most-specific-proxy-superclass class))
+	   (gtype (or 
+		   (first (ginstance-class-gtype class))
+		   (default-alien-type-name class-name))))
+      (unless (type-registered-p class-name)
+	(type-class-ref
+	 (if (or (symbolp gtype) (type-number-from-glib-name gtype nil))
+	     (register-type class-name gtype)
+	   (register-new-type class-name (class-name super) gtype)))
+	(push class-name *referenced-ginstance-classes*))
+      #+nil
+      (when (and
+	     (supertype (find-type-number class))
+	     (not (eq (class-name super) (supertype (find-type-number class)))))
+	(warn "Super class mismatch between CLOS and GObject for ~A" 
+	      class-name)))
+    (update-size class))
+  #-clisp(call-next-method))
+
+(defun reinitialize-ginstance-classes ()
+  (mapc #'type-class-ref *referenced-ginstance-classes*))
+
+(asdf:install-init-hook 'reinitialize-ginstance-classes)
+
+
+
+(defmethod shared-initialize ((class ginstance-class) names &rest initargs)
+  (declare (ignore names initargs))
   (call-next-method)
+  (when (class-finalized-p class)
+    (update-size class)))
 
-  (let* ((class-name (or name (class-name class)))
-	 (type-number
-	  (cond
-	   ((and alien-name type-init)
-	    (error
-	     "Specify either :type-init or :alien-name for class ~A"
-	     class-name))
-	   (alien-name (type-number-from-alien-name (first alien-name)))
-	   (type-init (type-init class-name (first type-init)))
-	   (t
-	    (or
-	     (type-number-from-alien-name
-	      (default-alien-type-name class-name) nil)
-	     (type-init class-name))))))
-    (setf (find-type-number class) type-number)
-    (unless size
-      (setf
-       (slot-value class 'size)
-       (type-instance-size (find-type-number class-name))))
-    (when ref
-      (setf
-       (slot-value class 'ref)
-       (mkbinding (first ref) 'pointer 'pointer)))
-    (when unref
-      (setf
-       (slot-value class 'unref)
-       (mkbinding (first unref) 'nil 'pointer)))))
-
-(defmethod shared-initialize :after ((class ginstance-class) names
-				     &rest initargs)
-  (declare (ignore names initargs))
-  (unless (slot-boundp class 'ref)
-    (setf
-     (slot-value class 'ref)
-     (ginstance-class-ref (most-specific-proxy-superclass class))))
-  (unless (slot-boundp class 'unref)
-    (setf
-     (slot-value class 'unref)
-     (ginstance-class-unref (most-specific-proxy-superclass class)))))
-
-
-(defmethod validate-superclass
-    ((class ginstance-class) (super pcl::standard-class))
+
+(defmethod validate-superclass ((class ginstance-class) (super standard-class))
   (subtypep (class-name super) 'ginstance))
 
 
-;;;; Initializing type numbers
-
-(setf (alien-type-name 'invalid) "invalid")
-(setf (alien-type-name 'char) "gchar")
-(setf (alien-type-name 'unsigned-char) "guchar")
-(setf (alien-type-name 'boolean) "gboolean")
-(setf (alien-type-name 'int) "gint")
-(setf (alien-type-name 'unsigned-int) "guint")
-(setf (alien-type-name 'long) "glong")
-(setf (alien-type-name 'unsigned-long) "gulong")
-(setf (alien-type-name 'single-float) "gfloat")
-(setf (alien-type-name 'double-float) "gdouble")
-(setf (alien-type-name 'string) "GString")
-(setf (find-type-number 'fixnum) (find-type-number 'int))
+;;;; Superclass for wrapping types in the glib type system
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (defclass ginstance (ref-counted-object)
+    (;(class :allocation :alien :type pointer :offset 0)
+     )
+    (:metaclass proxy-class)
+    (:size #.(size-of 'pointer))))
+
+(defun ref-type-number (location &optional offset)
+  (declare (ignore location offset)))
+
+(setf (symbol-function 'ref-type-number) (reader-function 'type-number))
+
+(defun %type-number-of-ginstance (location)
+  (let ((class (ref-pointer location)))
+    (ref-type-number class)))
+
+(defmethod make-proxy-instance :around ((class ginstance-class) location 
+					&rest initargs)
+  (declare (ignore class))
+  (let ((class (labels ((find-known-class (type-number)
+		          (or
+			   (find-class (type-from-number type-number) nil)
+			   (unless (zerop type-number)
+			     (find-known-class (type-parent type-number))))))
+		 (find-known-class (%type-number-of-ginstance location)))))
+    ;; Note that changing the class argument must not alter "the
+    ;; ordered set of applicable methods" as specified in the
+    ;; Hyperspec
+    (if class
+	(apply #'call-next-method class location initargs)
+      (error "Object at ~A has an unkown type number: ~A"
+       location (%type-number-of-ginstance location)))))
+
+
+;;;; Registering fundamental types
+
+(register-type 'nil "void")
+(register-type 'pointer "gpointer")
+(register-type 'char "gchar")
+(register-type 'unsigned-char "guchar")
+(register-type 'boolean "gboolean")
+(register-type 'int "gint")
+(register-type-alias 'integer 'int)
+(register-type-alias 'fixnum 'int)
+(register-type 'unsigned-int "guint")
+(register-type 'long "glong")
+(register-type 'unsigned-long "gulong")
+(register-type 'single-float "gfloat")
+(register-type 'double-float "gdouble")
+(register-type 'string "gchararray")
+(register-type-alias 'pathname 'string)
+
+
+;;;; Introspection of type information
+
+(defvar *derivable-type-info* (make-hash-table))
+
+(defun register-derivable-type (type id expander &optional dependencies)
+  (register-type type id)
+  (let ((type-number (register-type type id)))
+    (setf 
+     (gethash type-number *derivable-type-info*) 
+     (list expander dependencies))))
+
+(defun find-type-info (type)
+  (dolist (super (cdr (type-hierarchy type)))
+    (let ((info (gethash super *derivable-type-info*)))
+      (return-if info))))
+
+(defun expand-type-definition (type forward-p options)
+  (let ((expander (first (find-type-info type))))
+    (funcall expander (find-type-number type t) forward-p options)))
+
+
+(defbinding type-parent (type) type-number
+  ((find-type-number type t) type-number))
+
+(defun supertype (type)
+  (type-from-number (type-parent type)))
+
+(defbinding %type-interfaces (type) pointer
+  ((find-type-number type t) type-number)
+  (n-interfaces unsigned-int :out))
+
+(defun type-interfaces (type)
+  (multiple-value-bind (array length) (%type-interfaces type)
+    (unwind-protect
+	(map-c-vector 'list #'identity array 'type-number length)
+      (deallocate-memory array))))
+
+(defun implements (type)
+  (mapcar #'type-from-number (type-interfaces type)))
+
+(defun type-hierarchy (type)
+  (let ((type-number (find-type-number type t)))
+    (unless (= type-number 0)
+      (cons type-number (type-hierarchy (type-parent type-number))))))
+  
+(defbinding (type-is-p "g_type_is_a") (type super) boolean
+  ((find-type-number type) type-number)
+  ((find-type-number super) type-number))
+
+(defbinding %type-children () pointer
+  (type-number type-number)
+  (num-children unsigned-int :out))
+
+(defun map-subtypes (function type &optional prefix)
+  (let ((type-number (find-type-number type t)))
+    (multiple-value-bind (array length) (%type-children type-number)
+      (unwind-protect
+	  (map-c-vector
+	   'nil
+	   #'(lambda (type-number)
+	       (when (or
+		      (not prefix)
+		      (string-prefix-p prefix (find-foreign-type-name type-number)))
+		 (funcall function type-number))
+	       (map-subtypes function type-number prefix))
+	   array 'type-number length)
+	(deallocate-memory array)))))
+
+(defun find-types (prefix)
+  (let ((type-list nil))
+    (maphash
+     #'(lambda (type-number expander)
+	 (declare (ignore expander))
+	 (map-subtypes
+	  #'(lambda (type-number)
+	      (pushnew type-number type-list))
+	  type-number prefix))
+     *derivable-type-info*)
+    type-list))
+
+(defun find-type-dependencies (type &optional options)
+  (let ((find-dependencies (second (find-type-info type))))
+    (when find-dependencies
+      (remove-duplicates
+       (mapcar #'find-type-number
+        (funcall find-dependencies (find-type-number type t) options))))))
+
+
+;; The argument is a list where each elements is on the form 
+;; (type . dependencies). This function will not handle indirect
+;; dependencies and types depending on them selves.
+(defun sort-types-topologicaly (unsorted)
+  (flet ((depend-p (type1)
+           (find-if #'(lambda (type2)
+			(and
+			 ;; If a type depends a subtype it has to be
+			 ;; forward defined
+			 (not (type-is-p (car type2) (car type1)))
+			 (find (car type2) (cdr type1))))
+		    unsorted)))
+    (let ((sorted
+	   (loop
+	    while unsorted
+	    nconc (multiple-value-bind (sorted remaining)
+		      (delete-collect-if 
+		       #'(lambda (type)
+			   (or (not (cdr type)) (not (depend-p type))))
+		       unsorted)
+		    (cond
+		     ((not sorted)
+		      ;; We have a circular dependency which have to
+		      ;; be resolved
+		      (let ((selected
+			     (find-if 
+			      #'(lambda (type)			
+				  (every 
+				   #'(lambda (dep)
+				       (or
+					(not (type-is-p (car type) dep))
+					(not (find dep unsorted :key #'car))))
+				   (cdr type)))
+			      unsorted)))
+			(unless selected
+			  (error "Couldn't resolve circular dependency"))
+			(setq unsorted (delete selected unsorted))
+			(list selected)))
+		     (t
+		      (setq unsorted remaining)
+		      sorted))))))
+
+      ;; Mark types which have to be forward defined
+      (loop
+       for tmp on sorted
+       as (type . dependencies) = (first tmp)
+       collect (cons type (and
+			   dependencies
+			   (find-if #'(lambda (type)
+					(find (car type) dependencies))
+				    (rest tmp))
+			   t))))))
+
+
+(defun expand-type-definitions (type-list &optional args)
+  (flet ((type-options (type-number)
+	   (let ((name (find-foreign-type-name type-number)))
+	     (cdr (assoc name args :test #'string=)))))
+
+    (setq type-list
+     (delete-if
+      #'(lambda (type-number)
+	  (let ((name (find-foreign-type-name type-number)))
+	    (or
+	     (getf (type-options type-number) :ignore)
+	     (find-if
+	      #'(lambda (options)
+		  (and
+		   (string-prefix-p (first options) name)
+		   (getf (cdr options) :ignore-prefix)
+		   (not (some
+			 #'(lambda (exception)
+			     (string= name exception))
+			 (getf (cdr options) :except)))))
+	      args))))
+      type-list))
+
+    (dolist (type-number type-list)
+      (let ((name (find-foreign-type-name type-number)))
+	(register-type
+	 (getf (type-options type-number) :type (default-type-name name))
+	 (register-type-as type-number))))
+
+    ;; This is needed for some unknown reason to get type numbers right
+    (mapc #'find-type-dependencies type-list)
+
+    (let ((sorted-type-list 
+	   #+clisp (mapcar #'list type-list)
+	   #-clisp
+	   (sort-types-topologicaly 
+	    (mapcar 
+	     #'(lambda (type)
+		 (cons type (find-type-dependencies type (type-options type))))
+	     type-list))))
+      `(progn
+	 ,@(mapcar
+	    #'(lambda (pair)
+		(destructuring-bind (type . forward-p) pair
+		  (expand-type-definition type forward-p (type-options type))))
+	    sorted-type-list)
+	 ,@(mapcar
+	    #'(lambda (pair)
+		(destructuring-bind (type . forward-p) pair
+		  (when forward-p
+		    (expand-type-definition type nil (type-options type)))))
+	    sorted-type-list)))))
+
+(defun expand-types-with-prefix (prefix args)
+  (expand-type-definitions (find-types prefix) args))
+
+(defun expand-types-in-library (system library args)
+  (let* ((filename (library-filename system library))
+	 (types (loop 
+	         for (type-init . %filename) in *type-initializers*
+		 when (equal filename %filename)
+		 collect (funcall type-init))))
+    (expand-type-definitions types args)))
+
+(defun list-types-in-library (system library)
+  (let ((filename (library-filename system library)))
+    (loop 
+     for (type-init . %filename) in *type-initializers*
+     when (equal filename %filename)
+     collect type-init)))
+
+(defmacro define-types-by-introspection (prefix &rest args)
+  (expand-types-with-prefix prefix args))
+
+(defexport define-types-by-introspection (prefix &rest args)
+  (list-autoexported-symbols (expand-types-with-prefix prefix args)))
+
+(defmacro define-types-in-library (system library &rest args)
+  (expand-types-in-library system library args))
+
+(defexport define-types-in-library (system library &rest args)
+  (list-autoexported-symbols (expand-types-in-library system library args)))
+
+
+;;;; Initialize all non static types in GObject
+
+(init-types-in-library glib "libgobject-2.0")