gobject/gobject.h

   1 /* GObject - GLib Type, Object, Parameter and Signal Library
   2  * Copyright (C) 1998-1999, 2000-2001 Tim Janik and 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, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19 #if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
  20 #error "Only <glib-object.h> can be included directly."
  21 #endif
  22
  23 #ifndef __G_OBJECT_H__
  24 #define __G_OBJECT_H__
  25
  26 #include        <gobject/gtype.h>
  27 #include        <gobject/gvalue.h>
  28 #include        <gobject/gparam.h>
  29 #include        <gobject/gclosure.h>
  30 #include        <gobject/gsignal.h>
  31 #include        <gobject/gboxed.h>
  32
  33 G_BEGIN_DECLS
  34
  35 /* --- type macros --- */
  36 /**
  37  * G_TYPE_IS_OBJECT:
  38  * @type: Type id to check
  39  *
  40  * Check if the passed in type id is a %G_TYPE_OBJECT or derived from it.
  41  *
  42  * Returns: %FALSE or %TRUE, indicating whether @type is a %G_TYPE_OBJECT.
  43  */
  44 #define G_TYPE_IS_OBJECT(type)      (G_TYPE_FUNDAMENTAL (type) == G_TYPE_OBJECT)
  45 /**
  46  * G_OBJECT:
  47  * @object: Object which is subject to casting.
  48  *
  49  * Casts a #GObject or derived pointer into a (GObject*) pointer.
  50  * Depending on the current debugging level, this function may invoke
  51  * certain runtime checks to identify invalid casts.
  52  */
  53 #define G_OBJECT(object)            (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_OBJECT, GObject))
  54 /**
  55  * G_OBJECT_CLASS:
  56  * @class: a valid #GObjectClass
  57  *
  58  * Casts a derived #GObjectClass structure into a #GObjectClass structure.
  59  */
  60 #define G_OBJECT_CLASS(class)       (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_OBJECT, GObjectClass))
  61 /**
  62  * G_IS_OBJECT:
  63  * @object: Instance to check for being a %G_TYPE_OBJECT.
  64  *
  65  * Checks whether a valid #GTypeInstance pointer is of type %G_TYPE_OBJECT.
  66  */
  67 #define G_IS_OBJECT(object)         (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_OBJECT))
  68 /**
  69  * G_IS_OBJECT_CLASS:
  70  * @class: a #GObjectClass
  71  *
  72  * Checks whether @class "is a" valid #GObjectClass structure of type
  73  * %G_TYPE_OBJECT or derived.
  74  */
  75 #define G_IS_OBJECT_CLASS(class)    (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_OBJECT))
  76 /**
  77  * G_OBJECT_GET_CLASS:
  78  * @object: a #GObject instance.
  79  *
  80  * Get the class structure associated to a #GObject instance.
  81  *
  82  * Returns: pointer to object class structure.
  83  */
  84 #define G_OBJECT_GET_CLASS(object)  (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_OBJECT, GObjectClass))
  85 /**
  86  * G_OBJECT_TYPE:
  87  * @object: Object to return the type id for.
  88  *
  89  * Get the type id of an object.
  90  *
  91  * Returns: Type id of @object.
  92  */
  93 #define G_OBJECT_TYPE(object)       (G_TYPE_FROM_INSTANCE (object))
  94 /**
  95  * G_OBJECT_TYPE_NAME:
  96  * @object: Object to return the type name for.
  97  *
  98  * Get the name of an object's type.
  99  *
 100  * Returns: Type name of @object. The string is owned by the type system and
 101  *  should not be freed.
 102  */
 103 #define G_OBJECT_TYPE_NAME(object)  (g_type_name (G_OBJECT_TYPE (object)))
 104 /**
 105  * G_OBJECT_CLASS_TYPE:
 106  * @class: a valid #GObjectClass
 107  *
 108  * Get the type id of a class structure.
 109  *
 110  * Returns: Type id of @class.
 111  */
 112 #define G_OBJECT_CLASS_TYPE(class)  (G_TYPE_FROM_CLASS (class))
 113 /**
 114  * G_OBJECT_CLASS_NAME:
 115  * @class: a valid #GObjectClass
 116  *
 117  * Return the name of a class structure's type.
 118  *
 119  * Returns: Type name of @class. The string is owned by the type system and
 120  *  should not be freed.
 121  */
 122 #define G_OBJECT_CLASS_NAME(class)  (g_type_name (G_OBJECT_CLASS_TYPE (class)))
 123 /**
 124  * G_VALUE_HOLDS_OBJECT:
 125  * @value: a valid #GValue structure
 126  *
 127  * Checks whether the given #GValue can hold values derived from type %G_TYPE_OBJECT.
 128  *
 129  * Returns: %TRUE on success.
 130  */
 131 #define G_VALUE_HOLDS_OBJECT(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_OBJECT))
 132
 133 /* --- type macros --- */
 134 /**
 135  * G_TYPE_INITIALLY_UNOWNED:
 136  *
 137  * The type for #GInitiallyUnowned.
 138  */
 139 #define G_TYPE_INITIALLY_UNOWNED              (g_initially_unowned_get_type())
 140 /**
 141  * G_INITIALLY_UNOWNED:
 142  * @object: Object which is subject to casting.
 143  *
 144  * Casts a #GInitiallyUnowned or derived pointer into a (GInitiallyUnowned*)
 145  * pointer. Depending on the current debugging level, this function may invoke
 146  * certain runtime checks to identify invalid casts.
 147  */
 148 #define G_INITIALLY_UNOWNED(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_INITIALLY_UNOWNED, GInitiallyUnowned))
 149 /**
 150  * G_INITIALLY_UNOWNED_CLASS:
 151  * @class: a valid #GInitiallyUnownedClass
 152  *
 153  * Casts a derived #GInitiallyUnownedClass structure into a
 154  * #GInitiallyUnownedClass structure.
 155  */
 156 #define G_INITIALLY_UNOWNED_CLASS(class)      (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_INITIALLY_UNOWNED, GInitiallyUnownedClass))
 157 /**
 158  * G_IS_INITIALLY_UNOWNED:
 159  * @object: Instance to check for being a %G_TYPE_INITIALLY_UNOWNED.
 160  *
 161  * Checks whether a valid #GTypeInstance pointer is of type %G_TYPE_INITIALLY_UNOWNED.
 162  */
 163 #define G_IS_INITIALLY_UNOWNED(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_INITIALLY_UNOWNED))
 164 /**
 165  * G_IS_INITIALLY_UNOWNED_CLASS:
 166  * @class: a #GInitiallyUnownedClass
 167  *
 168  * Checks whether @class "is a" valid #GInitiallyUnownedClass structure of type
 169  * %G_TYPE_INITIALLY_UNOWNED or derived.
 170  */
 171 #define G_IS_INITIALLY_UNOWNED_CLASS(class)   (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_INITIALLY_UNOWNED))
 172 /**
 173  * G_INITIALLY_UNOWNED_GET_CLASS:
 174  * @object: a #GInitiallyUnowned instance.
 175  *
 176  * Get the class structure associated to a #GInitiallyUnowned instance.
 177  *
 178  * Returns: pointer to object class structure.
 179  */
 180 #define G_INITIALLY_UNOWNED_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_INITIALLY_UNOWNED, GInitiallyUnownedClass))
 181 /* GInitiallyUnowned ia a GObject with initially floating reference count */
 182
 183
 184 /* --- typedefs & structures --- */
 185 typedef struct _GObject                  GObject;
 186 typedef struct _GObjectClass             GObjectClass;
 187 typedef struct _GObject                  GInitiallyUnowned;
 188 typedef struct _GObjectClass             GInitiallyUnownedClass;
 189 typedef struct _GObjectConstructParam    GObjectConstructParam;
 190 /**
 191  * GObjectGetPropertyFunc:
 192  * @object: a #GObject
 193  * @property_id: the numeric id under which the property was registered with
 194  *  g_object_class_install_property().
 195  * @value: a #GValue to return the property value in
 196  * @pspec: the #GParamSpec describing the property
 197  *
 198  * The type of the @get_property function of #GObjectClass.
 199  */
 200 typedef void (*GObjectGetPropertyFunc)  (GObject      *object,
 201                                          guint         property_id,
 202                                          GValue       *value,
 203                                          GParamSpec   *pspec);
 204 /**
 205  * GObjectSetPropertyFunc:
 206  * @object: a #GObject
 207  * @property_id: the numeric id under which the property was registered with
 208  *  g_object_class_install_property().
 209  * @value: the new value for the property
 210  * @pspec: the #GParamSpec describing the property
 211  *
 212  * The type of the @set_property function of #GObjectClass.
 213  */
 214 typedef void (*GObjectSetPropertyFunc)  (GObject      *object,
 215                                          guint         property_id,
 216                                          const GValue *value,
 217                                          GParamSpec   *pspec);
 218 /**
 219  * GObjectFinalizeFunc:
 220  * @object: the #GObject being finalized
 221  *
 222  * The type of the @finalize function of #GObjectClass.
 223  */
 224 typedef void (*GObjectFinalizeFunc)     (GObject      *object);
 225 /**
 226  * GWeakNotify:
 227  * @data: data that was provided when the weak reference was established
 228  * @where_the_object_was: the object being finalized
 229  *
 230  * A #GWeakNotify function can be added to an object as a callback that gets
 231  * triggered when the object is finalized. Since the object is already being
 232  * finalized when the #GWeakNotify is called, there's not much you could do
 233  * with the object, apart from e.g. using its address as hash-index or the like.
 234  */
 235 typedef void (*GWeakNotify)             (gpointer      data,
 236                                          GObject      *where_the_object_was);
 237 /**
 238  * GObject:
 239  *
 240  * All the fields in the <structname>GObject</structname> structure are private
 241  * to the #GObject implementation and should never be accessed directly.
 242  */
 243 struct  _GObject
 244 {
 245   GTypeInstance  g_type_instance;
 246
 247   /*< private >*/
 248   volatile guint ref_count;
 249   GData         *qdata;
 250 };
 251 /**
 252  * GObjectClass:
 253  * @g_type_class: the parent class
 254  * @constructor: the @constructor function is called by g_object_new () to
 255  *  complete the object initialization after all the construction properties are
 256  *  set. The first thing a @constructor implementation must do is chain up to the
 257  *  @constructor of the parent class. Overriding @constructor should be rarely
 258  *  needed, e.g. to handle construct properties, or to implement singletons.
 259  * @set_property: the generic setter for all properties of this type. Should be
 260  *  overridden for every type with properties. Implementations of @set_property
 261  *  don't need to emit property change notification explicitly, this is handled
 262  *  by the type system.
 263  * @get_property: the generic getter for all properties of this type. Should be
 264  *  overridden for every type with properties.
 265  * @dispose: the @dispose function is supposed to drop all references to other
 266  *  objects, but keep the instance otherwise intact, so that client method
 267  *  invocations still work. It may be run multiple times (due to reference
 268  *  loops). Before returning, @dispose should chain up to the @dispose method
 269  *  of the parent class.
 270  * @finalize: instance finalization function, should finish the finalization of
 271  *  the instance begun in @dispose and chain up to the @finalize method of the
 272  *  parent class.
 273  * @dispatch_properties_changed: emits property change notification for a bunch
 274  *  of properties. Overriding @dispatch_properties_changed should be rarely
 275  *  needed.
 276  * @notify: the class closure for the notify signal
 277  * @constructed: the @constructed function is called by g_object_new() as the
 278  *  final step of the object creation process.  At the point of the call, all
 279  *  construction properties have been set on the object.  The purpose of this
 280  *  call is to allow for object initialisation steps that can only be performed
 281  *  after construction properties have been set.  @constructed implementors
 282  *  should chain up to the @constructed call of their parent class to allow it
 283  *  to complete its initialisation.
 284  *
 285  * The class structure for the <structname>GObject</structname> type.
 286  *
 287  * <example>
 288  * <title>Implementing singletons using a constructor</title>
 289  * <programlisting>
 290  * static MySingleton *the_singleton = NULL;
 291  *
 292  * static GObject*
 293  * my_singleton_constructor (GType                  type,
 294  *                           guint                  n_construct_params,
 295  *                           GObjectConstructParam *construct_params)
 296  * {
 297  *   GObject *object;
 298  *
 299  *   if (!the_singleton)
 300  *     {
 301  *       object = G_OBJECT_CLASS (parent_class)->constructor (type,
 302  *                                                            n_construct_params,
 303  *                                                            construct_params);
 304  *       the_singleton = MY_SINGLETON (object);
 305  *     }
 306  *   else
 307  *     object = g_object_ref (G_OBJECT (the_singleton));
 308  *
 309  *   return object;
 310  * }
 311  * </programlisting></example>
 312  */
 313 struct  _GObjectClass
 314 {
 315   GTypeClass   g_type_class;
 316
 317   /*< private >*/
 318   GSList      *construct_properties;
 319
 320   /*< public >*/
 321   /* seldom overidden */
 322   GObject*   (*constructor)     (GType                  type,
 323                                  guint                  n_construct_properties,
 324                                  GObjectConstructParam *construct_properties);
 325   /* overridable methods */
 326   void       (*set_property)            (GObject        *object,
 327                                          guint           property_id,
 328                                          const GValue   *value,
 329                                          GParamSpec     *pspec);
 330   void       (*get_property)            (GObject        *object,
 331                                          guint           property_id,
 332                                          GValue         *value,
 333                                          GParamSpec     *pspec);
 334   void       (*dispose)                 (GObject        *object);
 335   void       (*finalize)                (GObject        *object);
 336   /* seldom overidden */
 337   void       (*dispatch_properties_changed) (GObject      *object,
 338                                              guint         n_pspecs,
 339                                              GParamSpec  **pspecs);
 340   /* signals */
 341   void       (*notify)                  (GObject        *object,
 342                                          GParamSpec     *pspec);
 343
 344   /* called when done constructing */
 345   void       (*constructed)             (GObject        *object);
 346
 347   /*< private >*/
 348   gsize         flags;
 349
 350   /* padding */
 351   gpointer      pdummy[6];
 352 };
 353 /**
 354  * GObjectConstructParam:
 355  * @pspec: the #GParamSpec of the construct parameter
 356  * @value: the value to set the parameter to
 357  *
 358  * The <structname>GObjectConstructParam</structname> struct is an auxiliary
 359  * structure used to hand #GParamSpec/#GValue pairs to the @constructor of
 360  * a #GObjectClass.
 361  */
 362 struct _GObjectConstructParam
 363 {
 364   GParamSpec *pspec;
 365   GValue     *value;
 366 };
 367
 368 /**
 369  * GInitiallyUnowned:
 370  *
 371  * All the fields in the <structname>GInitiallyUnowned</structname> structure
 372  * are private to the #GInitiallyUnowned implementation and should never be
 373  * accessed directly.
 374  */
 375 /**
 376  * GInitiallyUnownedClass:
 377  *
 378  * The class structure for the <structname>GInitiallyUnowned</structname> type.
 379  */
 380
 381
 382 /* --- prototypes --- */
 383 GType       g_initially_unowned_get_type      (void);
 384 void        g_object_class_install_property   (GObjectClass   *oclass,
 385                                                guint           property_id,
 386                                                GParamSpec     *pspec);
 387 GParamSpec* g_object_class_find_property      (GObjectClass   *oclass,
 388                                                const gchar    *property_name);
 389 GParamSpec**g_object_class_list_properties    (GObjectClass   *oclass,
 390                                                guint          *n_properties);
 391 void        g_object_class_override_property  (GObjectClass   *oclass,
 392                                                guint           property_id,
 393                                                const gchar    *name);
 394 void        g_object_class_install_properties (GObjectClass   *oclass,
 395                                                guint           n_pspecs,
 396                                                GParamSpec    **pspecs);
 397
 398 void        g_object_interface_install_property (gpointer     g_iface,
 399                                                  GParamSpec  *pspec);
 400 GParamSpec* g_object_interface_find_property    (gpointer     g_iface,
 401                                                  const gchar *property_name);
 402 GParamSpec**g_object_interface_list_properties  (gpointer     g_iface,
 403                                                  guint       *n_properties_p);
 404
 405 GType       g_object_get_type                 (void) G_GNUC_CONST;
 406 gpointer    g_object_new                      (GType           object_type,
 407                                                const gchar    *first_property_name,
 408                                                ...);
 409 gpointer    g_object_newv                     (GType           object_type,
 410                                                guint           n_parameters,
 411                                                GParameter     *parameters);
 412 GObject*    g_object_new_valist               (GType           object_type,
 413                                                const gchar    *first_property_name,
 414                                                va_list         var_args);
 415 void        g_object_set                      (gpointer        object,
 416                                                const gchar    *first_property_name,
 417                                                ...) G_GNUC_NULL_TERMINATED;
 418 void        g_object_get                      (gpointer        object,
 419                                                const gchar    *first_property_name,
 420                                                ...) G_GNUC_NULL_TERMINATED;
 421 gpointer    g_object_connect                  (gpointer        object,
 422                                                const gchar    *signal_spec,
 423                                                ...) G_GNUC_NULL_TERMINATED;
 424 void        g_object_disconnect               (gpointer        object,
 425                                                const gchar    *signal_spec,
 426                                                ...) G_GNUC_NULL_TERMINATED;
 427 void        g_object_set_valist               (GObject        *object,
 428                                                const gchar    *first_property_name,
 429                                                va_list         var_args);
 430 void        g_object_get_valist               (GObject        *object,
 431                                                const gchar    *first_property_name,
 432                                                va_list         var_args);
 433 void        g_object_set_property             (GObject        *object,
 434                                                const gchar    *property_name,
 435                                                const GValue   *value);
 436 void        g_object_get_property             (GObject        *object,
 437                                                const gchar    *property_name,
 438                                                GValue         *value);
 439 void        g_object_freeze_notify            (GObject        *object);
 440 void        g_object_notify                   (GObject        *object,
 441                                                const gchar    *property_name);
 442 void        g_object_notify_by_pspec          (GObject        *object,
 443                                                GParamSpec     *pspec);
 444 void        g_object_thaw_notify              (GObject        *object);
 445 gboolean    g_object_is_floating              (gpointer        object);
 446 gpointer    g_object_ref_sink                 (gpointer        object);
 447 gpointer    g_object_ref                      (gpointer        object);
 448 void        g_object_unref                    (gpointer        object);
 449 void        g_object_weak_ref                 (GObject        *object,
 450                                                GWeakNotify     notify,
 451                                                gpointer        data);
 452 void        g_object_weak_unref               (GObject        *object,
 453                                                GWeakNotify     notify,
 454                                                gpointer        data);
 455 void        g_object_add_weak_pointer         (GObject        *object,
 456                                                gpointer       *weak_pointer_location);
 457 void        g_object_remove_weak_pointer      (GObject        *object,
 458                                                gpointer       *weak_pointer_location);
 459
 460 /**
 461  * GToggleNotify:
 462  * @data: Callback data passed to g_object_add_toggle_ref()
 463  * @object: The object on which g_object_add_toggle_ref() was called.
 464  * @is_last_ref: %TRUE if the toggle reference is now the
 465  *  last reference to the object. %FALSE if the toggle
 466  *  reference was the last reference and there are now other
 467  *  references.
 468  *
 469  * A callback function used for notification when the state
 470  * of a toggle reference changes. See g_object_add_toggle_ref().
 471  */
 472 typedef void (*GToggleNotify) (gpointer      data,
 473                                GObject      *object,
 474                                gboolean      is_last_ref);
 475
 476 void g_object_add_toggle_ref    (GObject       *object,
 477                                  GToggleNotify  notify,
 478                                  gpointer       data);
 479 void g_object_remove_toggle_ref (GObject       *object,
 480                                  GToggleNotify  notify,
 481                                  gpointer       data);
 482
 483 gpointer    g_object_get_qdata                (GObject        *object,
 484                                                GQuark          quark);
 485 void        g_object_set_qdata                (GObject        *object,
 486                                                GQuark          quark,
 487                                                gpointer        data);
 488 void        g_object_set_qdata_full           (GObject        *object,
 489                                                GQuark          quark,
 490                                                gpointer        data,
 491                                                GDestroyNotify  destroy);
 492 gpointer    g_object_steal_qdata              (GObject        *object,
 493                                                GQuark          quark);
 494
 495 GLIB_AVAILABLE_IN_2_34
 496 gpointer    g_object_dup_qdata                (GObject        *object,
 497                                                GQuark          quark,
 498                                                GDuplicateFunc  dup_func,
 499                                                gpointer         user_data);
 500 GLIB_AVAILABLE_IN_2_34
 501 gboolean    g_object_replace_qdata            (GObject        *object,
 502                                                GQuark          quark,
 503                                                gpointer        oldval,
 504                                                gpointer        newval,
 505                                                GDestroyNotify  destroy,
 506                                                GDestroyNotify *old_destroy);
 507
 508 gpointer    g_object_get_data                 (GObject        *object,
 509                                                const gchar    *key);
 510 void        g_object_set_data                 (GObject        *object,
 511                                                const gchar    *key,
 512                                                gpointer        data);
 513 void        g_object_set_data_full            (GObject        *object,
 514                                                const gchar    *key,
 515                                                gpointer        data,
 516                                                GDestroyNotify  destroy);
 517 gpointer    g_object_steal_data               (GObject        *object,
 518                                                const gchar    *key);
 519
 520 GLIB_AVAILABLE_IN_2_34
 521 gpointer    g_object_dup_data                 (GObject        *object,
 522                                                const gchar    *key,
 523                                                GDuplicateFunc  dup_func,
 524                                                gpointer         user_data);
 525 GLIB_AVAILABLE_IN_2_34
 526 gboolean    g_object_replace_data             (GObject        *object,
 527                                                const gchar    *key,
 528                                                gpointer        oldval,
 529                                                gpointer        newval,
 530                                                GDestroyNotify  destroy,
 531                                                GDestroyNotify *old_destroy);
 532
 533
 534 void        g_object_watch_closure            (GObject        *object,
 535                                                GClosure       *closure);
 536 GClosure*   g_cclosure_new_object             (GCallback       callback_func,
 537                                                GObject        *object);
 538 GClosure*   g_cclosure_new_object_swap        (GCallback       callback_func,
 539                                                GObject        *object);
 540 GClosure*   g_closure_new_object              (guint           sizeof_closure,
 541                                                GObject        *object);
 542 void        g_value_set_object                (GValue         *value,
 543                                                gpointer        v_object);
 544 gpointer    g_value_get_object                (const GValue   *value);
 545 gpointer    g_value_dup_object                (const GValue   *value);
 546 gulong      g_signal_connect_object           (gpointer        instance,
 547                                                const gchar    *detailed_signal,
 548                                                GCallback       c_handler,
 549                                                gpointer        gobject,
 550                                                GConnectFlags   connect_flags);
 551
 552 /*< protected >*/
 553 void        g_object_force_floating           (GObject        *object);
 554 void        g_object_run_dispose              (GObject        *object);
 555
 556
 557 void        g_value_take_object               (GValue         *value,
 558                                                gpointer        v_object);
 559 GLIB_DEPRECATED_FOR(g_value_take_object)
 560 void        g_value_set_object_take_ownership (GValue         *value,
 561                                                gpointer        v_object);
 562
 563 GLIB_DEPRECATED
 564 gsize       g_object_compat_control           (gsize           what,
 565                                                gpointer        data);
 566
 567 /* --- implementation macros --- */
 568 #define G_OBJECT_WARN_INVALID_PSPEC(object, pname, property_id, pspec) \
 569 G_STMT_START { \
 570   GObject *_object = (GObject*) (object); \
 571   GParamSpec *_pspec = (GParamSpec*) (pspec); \
 572   guint _property_id = (property_id); \
 573   g_warning ("%s: invalid %s id %u for \"%s\" of type `%s' in `%s'", \
 574              G_STRLOC, \
 575              (pname), \
 576              _property_id, \
 577              _pspec->name, \
 578              g_type_name (G_PARAM_SPEC_TYPE (_pspec)), \
 579              G_OBJECT_TYPE_NAME (_object)); \
 580 } G_STMT_END
 581 /**
 582  * G_OBJECT_WARN_INVALID_PROPERTY_ID:
 583  * @object: the #GObject on which set_property() or get_property() was called
 584  * @property_id: the numeric id of the property
 585  * @pspec: the #GParamSpec of the property
 586  *
 587  * This macro should be used to emit a standard warning about unexpected
 588  * properties in set_property() and get_property() implementations.
 589  */
 590 #define G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec) \
 591     G_OBJECT_WARN_INVALID_PSPEC ((object), "property", (property_id), (pspec))
 592
 593 void    g_clear_object (volatile GObject **object_ptr);
 594 #define g_clear_object(object_ptr) g_clear_pointer ((object_ptr), g_object_unref)
 595
 596 typedef struct {
 597     /*<private>*/
 598     union { gpointer p; } priv;
 599 } GWeakRef;
 600
 601 void     g_weak_ref_init       (GWeakRef *weak_ref,
 602                                 gpointer  object);
 603 void     g_weak_ref_clear      (GWeakRef *weak_ref);
 604 gpointer g_weak_ref_get        (GWeakRef *weak_ref);
 605 void     g_weak_ref_set        (GWeakRef *weak_ref,
 606                                 gpointer  object);
 607
 608 G_END_DECLS
 609
 610 #endif /* __G_OBJECT_H__ */