Pileus Git - ~andy/gtk/blob - gtk/gtkobject.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   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
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <stdarg.h>
  30 #include <string.h>
  31 #include <stdio.h>
  32
  33 #include "gtkobject.h"
  34 #include "gtkintl.h"
  35 #include "gtkmarshalers.h"
  36 #include "gtkprivate.h"
  37
  38 #include "gtkalias.h"
  39
  40
  41 enum {
  42   DESTROY,
  43   LAST_SIGNAL
  44 };
  45
  46
  47 static void       gtk_object_base_class_init     (GtkObjectClass *class);
  48 static void       gtk_object_base_class_finalize (GtkObjectClass *class);
  49 static void       gtk_object_class_init          (GtkObjectClass *klass);
  50 static void       gtk_object_init                (GtkObject      *object,
  51                                                   GtkObjectClass *klass);
  52 static void       gtk_object_dispose            (GObject        *object);
  53 static void       gtk_object_real_destroy        (GtkObject      *object);
  54 static void       gtk_object_finalize            (GObject        *object);
  55
  56 static gpointer    parent_class = NULL;
  57 static guint       object_signals[LAST_SIGNAL] = { 0 };
  58
  59
  60 /****************************************************
  61  * GtkObject type, class and instance initialization
  62  *
  63  ****************************************************/
  64
  65 GType
  66 gtk_object_get_type (void)
  67 {
  68   static GType object_type = 0;
  69
  70   if (!object_type)
  71     {
  72       const GTypeInfo object_info =
  73       {
  74         sizeof (GtkObjectClass),
  75         (GBaseInitFunc) gtk_object_base_class_init,
  76         (GBaseFinalizeFunc) gtk_object_base_class_finalize,
  77         (GClassInitFunc) gtk_object_class_init,
  78         NULL,           /* class_finalize */
  79         NULL,           /* class_data */
  80         sizeof (GtkObject),
  81         16,             /* n_preallocs */
  82         (GInstanceInitFunc) gtk_object_init,
  83         NULL,           /* value_table */
  84       };
  85
  86       object_type = g_type_register_static (G_TYPE_INITIALLY_UNOWNED, I_("GtkObject"),
  87                                             &object_info, G_TYPE_FLAG_ABSTRACT);
  88     }
  89
  90   return object_type;
  91 }
  92
  93 static void
  94 gtk_object_base_class_init (GtkObjectClass *class)
  95 {
  96 }
  97
  98 static void
  99 gtk_object_base_class_finalize (GtkObjectClass *class)
 100 {
 101 }
 102
 103 static void
 104 gtk_object_class_init (GtkObjectClass *class)
 105 {
 106   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 107
 108   parent_class = g_type_class_ref (G_TYPE_OBJECT);
 109
 110   gobject_class->dispose = gtk_object_dispose;
 111   gobject_class->finalize = gtk_object_finalize;
 112
 113   class->destroy = gtk_object_real_destroy;
 114
 115   object_signals[DESTROY] =
 116     g_signal_new (I_("destroy"),
 117                   G_TYPE_FROM_CLASS (gobject_class),
 118                   G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
 119                   G_STRUCT_OFFSET (GtkObjectClass, destroy),
 120                   NULL, NULL,
 121                   _gtk_marshal_VOID__VOID,
 122                   G_TYPE_NONE, 0);
 123 }
 124
 125 static void
 126 gtk_object_init (GtkObject      *object,
 127                  GtkObjectClass *klass)
 128 {
 129 }
 130
 131 /********************************************
 132  * Functions to end a GtkObject's life time
 133  *
 134  ********************************************/
 135 void
 136 gtk_object_destroy (GtkObject *object)
 137 {
 138   g_return_if_fail (GTK_IS_OBJECT (object));
 139
 140   if (!(GTK_OBJECT_FLAGS (object) & GTK_IN_DESTRUCTION))
 141     g_object_run_dispose (G_OBJECT (object));
 142 }
 143
 144 static void
 145 gtk_object_dispose (GObject *gobject)
 146 {
 147   GtkObject *object = GTK_OBJECT (gobject);
 148
 149   /* guard against reinvocations during
 150    * destruction with the GTK_IN_DESTRUCTION flag.
 151    */
 152   if (!(GTK_OBJECT_FLAGS (object) & GTK_IN_DESTRUCTION))
 153     {
 154       GTK_OBJECT_SET_FLAGS (object, GTK_IN_DESTRUCTION);
 155
 156       g_signal_emit (object, object_signals[DESTROY], 0);
 157
 158       GTK_OBJECT_UNSET_FLAGS (object, GTK_IN_DESTRUCTION);
 159     }
 160
 161   G_OBJECT_CLASS (parent_class)->dispose (gobject);
 162 }
 163
 164 static void
 165 gtk_object_real_destroy (GtkObject *object)
 166 {
 167   g_signal_handlers_destroy (object);
 168 }
 169
 170 static void
 171 gtk_object_finalize (GObject *gobject)
 172 {
 173   GtkObject *object = GTK_OBJECT (gobject);
 174
 175   if (g_object_is_floating (object))
 176     {
 177       g_warning ("A floating object was finalized. This means that someone\n"
 178                  "called g_object_unref() on an object that had only a floating\n"
 179                  "reference; the initial floating reference is not owned by anyone\n"
 180                  "and must be removed with g_object_ref_sink().");
 181     }
 182
 183   G_OBJECT_CLASS (parent_class)->finalize (gobject);
 184 }
 185
 186 #define __GTK_OBJECT_C__
 187 #include "gtkaliasdef.c"