tests/gobject/references.c

   1 /* GObject - GLib Type, Object, Parameter and Signal Library
   2  * Copyright (C) 2005 Red Hat, Inc.
   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
  15  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #undef  G_LOG_DOMAIN
  19 #define G_LOG_DOMAIN "TestReferences"
  20
  21 #undef G_DISABLE_ASSERT
  22 #undef G_DISABLE_CHECKS
  23 #undef G_DISABLE_CAST_CHECKS
  24
  25 #include        <glib-object.h>
  26
  27 /* This test tests weak and toggle references
  28  */
  29
  30 static GObject *global_object;
  31
  32 static gboolean object_destroyed;
  33 static gboolean weak_ref1_notified;
  34 static gboolean weak_ref2_notified;
  35 static gboolean toggle_ref1_weakened;
  36 static gboolean toggle_ref1_strengthened;
  37 static gboolean toggle_ref2_weakened;
  38 static gboolean toggle_ref2_strengthened;
  39 static gboolean toggle_ref3_weakened;
  40 static gboolean toggle_ref3_strengthened;
  41
  42 /*
  43  * TestObject, a parent class for TestObject
  44  */
  45 static GType test_object_get_type (void);
  46 #define TEST_TYPE_OBJECT          (test_object_get_type ())
  47 typedef struct _TestObject        TestObject;
  48 typedef struct _TestObjectClass   TestObjectClass;
  49
  50 struct _TestObject
  51 {
  52   GObject parent_instance;
  53 };
  54 struct _TestObjectClass
  55 {
  56   GObjectClass parent_class;
  57 };
  58
  59 G_DEFINE_TYPE (TestObject, test_object, G_TYPE_OBJECT);
  60
  61 static void
  62 test_object_finalize (GObject *object)
  63 {
  64   object_destroyed = TRUE;
  65
  66   G_OBJECT_CLASS (test_object_parent_class)->finalize (object);
  67 }
  68
  69 static void
  70 test_object_class_init (TestObjectClass *class)
  71 {
  72   GObjectClass *object_class = G_OBJECT_CLASS (class);
  73
  74   object_class->finalize = test_object_finalize;
  75 }
  76
  77 static void
  78 test_object_init (TestObject *test_object)
  79 {
  80 }
  81
  82 static void
  83 clear_flags (void)
  84 {
  85   object_destroyed = FALSE;
  86   weak_ref1_notified = FALSE;
  87   weak_ref2_notified = FALSE;
  88   toggle_ref1_weakened = FALSE;
  89   toggle_ref1_strengthened = FALSE;
  90   toggle_ref2_weakened = FALSE;
  91   toggle_ref2_strengthened = FALSE;
  92   toggle_ref3_weakened = FALSE;
  93   toggle_ref3_strengthened = FALSE;
  94 }
  95
  96 static void
  97 weak_ref1 (gpointer data,
  98            GObject *object)
  99 {
 100   g_assert (object == global_object);
 101   g_assert (data == GUINT_TO_POINTER (42));
 102
 103   weak_ref1_notified = TRUE;
 104 }
 105
 106 static void
 107 weak_ref2 (gpointer data,
 108            GObject *object)
 109 {
 110   g_assert (object == global_object);
 111   g_assert (data == GUINT_TO_POINTER (24));
 112
 113   weak_ref2_notified = TRUE;
 114 }
 115
 116 static void
 117 toggle_ref1 (gpointer data,
 118              GObject *object,
 119              gboolean is_last_ref)
 120 {
 121   g_assert (object == global_object);
 122   g_assert (data == GUINT_TO_POINTER (42));
 123
 124   if (is_last_ref)
 125     toggle_ref1_weakened = TRUE;
 126   else
 127     toggle_ref1_strengthened = TRUE;
 128 }
 129
 130 static void
 131 toggle_ref2 (gpointer data,
 132              GObject *object,
 133              gboolean is_last_ref)
 134 {
 135   g_assert (object == global_object);
 136   g_assert (data == GUINT_TO_POINTER (24));
 137
 138   if (is_last_ref)
 139     toggle_ref2_weakened = TRUE;
 140   else
 141     toggle_ref2_strengthened = TRUE;
 142 }
 143
 144 static void
 145 toggle_ref3 (gpointer data,
 146              GObject *object,
 147              gboolean is_last_ref)
 148 {
 149   g_assert (object == global_object);
 150   g_assert (data == GUINT_TO_POINTER (34));
 151
 152   if (is_last_ref)
 153     {
 154       toggle_ref3_weakened = TRUE;
 155       g_object_remove_toggle_ref (object, toggle_ref3, GUINT_TO_POINTER (34));
 156     }
 157   else
 158     toggle_ref3_strengthened = TRUE;
 159 }
 160
 161 int
 162 main (int   argc,
 163       char *argv[])
 164 {
 165   GObject *object;
 166
 167   g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
 168                           G_LOG_LEVEL_WARNING |
 169                           G_LOG_LEVEL_CRITICAL);
 170
 171   /* Test basic weak reference operation
 172    */
 173   global_object = object = g_object_new (TEST_TYPE_OBJECT, NULL);
 174
 175   g_object_weak_ref (object, weak_ref1, GUINT_TO_POINTER (42));
 176
 177   clear_flags ();
 178   g_object_unref (object);
 179   g_assert (weak_ref1_notified == TRUE);
 180   g_assert (object_destroyed == TRUE);
 181
 182   /* Test two weak references at once
 183    */
 184   global_object = object = g_object_new (TEST_TYPE_OBJECT, NULL);
 185
 186   g_object_weak_ref (object, weak_ref1, GUINT_TO_POINTER (42));
 187   g_object_weak_ref (object, weak_ref2, GUINT_TO_POINTER (24));
 188
 189   clear_flags ();
 190   g_object_unref (object);
 191   g_assert (weak_ref1_notified == TRUE);
 192   g_assert (weak_ref2_notified == TRUE);
 193   g_assert (object_destroyed == TRUE);
 194
 195   /* Test remove weak references
 196    */
 197   global_object = object = g_object_new (TEST_TYPE_OBJECT, NULL);
 198
 199   g_object_weak_ref (object, weak_ref1, GUINT_TO_POINTER (42));
 200   g_object_weak_ref (object, weak_ref2, GUINT_TO_POINTER (24));
 201   g_object_weak_unref (object, weak_ref1, GUINT_TO_POINTER (42));
 202
 203   clear_flags ();
 204   g_object_unref (object);
 205   g_assert (weak_ref1_notified == FALSE);
 206   g_assert (weak_ref2_notified == TRUE);
 207   g_assert (object_destroyed == TRUE);
 208
 209   /* Test basic toggle reference operation
 210    */
 211   global_object = object = g_object_new (TEST_TYPE_OBJECT, NULL);
 212
 213   g_object_add_toggle_ref (object, toggle_ref1, GUINT_TO_POINTER (42));
 214
 215   clear_flags ();
 216   g_object_unref (object);
 217   g_assert (toggle_ref1_weakened == TRUE);
 218   g_assert (toggle_ref1_strengthened == FALSE);
 219   g_assert (object_destroyed == FALSE);
 220
 221   clear_flags ();
 222   g_object_ref (object);
 223   g_assert (toggle_ref1_weakened == FALSE);
 224   g_assert (toggle_ref1_strengthened == TRUE);
 225   g_assert (object_destroyed == FALSE);
 226
 227   g_object_unref (object);
 228
 229   clear_flags ();
 230   g_object_remove_toggle_ref (object, toggle_ref1, GUINT_TO_POINTER (42));
 231   g_assert (toggle_ref1_weakened == FALSE);
 232   g_assert (toggle_ref1_strengthened == FALSE);
 233   g_assert (object_destroyed == TRUE);
 234
 235   global_object = object = g_object_new (TEST_TYPE_OBJECT, NULL);
 236
 237   /* Test two toggle references at once
 238    */
 239   g_object_add_toggle_ref (object, toggle_ref1, GUINT_TO_POINTER (42));
 240   g_object_add_toggle_ref (object, toggle_ref2, GUINT_TO_POINTER (24));
 241
 242   clear_flags ();
 243   g_object_unref (object);
 244   g_assert (toggle_ref1_weakened == FALSE);
 245   g_assert (toggle_ref1_strengthened == FALSE);
 246   g_assert (toggle_ref2_weakened == FALSE);
 247   g_assert (toggle_ref2_strengthened == FALSE);
 248   g_assert (object_destroyed == FALSE);
 249
 250   clear_flags ();
 251   g_object_remove_toggle_ref (object, toggle_ref1, GUINT_TO_POINTER (42));
 252   g_assert (toggle_ref1_weakened == FALSE);
 253   g_assert (toggle_ref1_strengthened == FALSE);
 254   g_assert (toggle_ref2_weakened == TRUE);
 255   g_assert (toggle_ref2_strengthened == FALSE);
 256   g_assert (object_destroyed == FALSE);
 257
 258   clear_flags ();
 259   g_object_remove_toggle_ref (object, toggle_ref2, GUINT_TO_POINTER (24));
 260   g_assert (toggle_ref1_weakened == FALSE);
 261   g_assert (toggle_ref1_strengthened == FALSE);
 262   g_assert (toggle_ref2_weakened == FALSE);
 263   g_assert (toggle_ref2_strengthened == FALSE);
 264   g_assert (object_destroyed == TRUE);
 265
 266   /* Test a toggle reference that removes itself
 267    */
 268   global_object = object = g_object_new (TEST_TYPE_OBJECT, NULL);
 269
 270   g_object_add_toggle_ref (object, toggle_ref3, GUINT_TO_POINTER (34));
 271
 272   clear_flags ();
 273   g_object_unref (object);
 274   g_assert (toggle_ref3_weakened == TRUE);
 275   g_assert (toggle_ref3_strengthened == FALSE);
 276   g_assert (object_destroyed == TRUE);
 277
 278   return 0;
 279 }