mirror of https://gitee.com/openkylin/glib2.0.git
939 lines
34 KiB
C
939 lines
34 KiB
C
/* GObject - GLib Type, Object, Parameter and Signal Library
|
||
* Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
|
||
*
|
||
* SPDX-License-Identifier: LGPL-2.1-or-later
|
||
*
|
||
* 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 2.1 of the License, or (at your option) any later version.
|
||
*
|
||
* 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.
|
||
*
|
||
* You should have received a copy of the GNU Lesser General
|
||
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
#ifndef __G_OBJECT_H__
|
||
#define __G_OBJECT_H__
|
||
|
||
#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
|
||
#error "Only <glib-object.h> can be included directly."
|
||
#endif
|
||
|
||
#include <gobject/gtype.h>
|
||
#include <gobject/gvalue.h>
|
||
#include <gobject/gparam.h>
|
||
#include <gobject/gclosure.h>
|
||
#include <gobject/gsignal.h>
|
||
#include <gobject/gboxed.h>
|
||
|
||
G_BEGIN_DECLS
|
||
|
||
/* --- type macros --- */
|
||
/**
|
||
* G_TYPE_IS_OBJECT:
|
||
* @type: Type id to check
|
||
*
|
||
* Check if the passed in type id is a %G_TYPE_OBJECT or derived from it.
|
||
*
|
||
* Returns: %FALSE or %TRUE, indicating whether @type is a %G_TYPE_OBJECT.
|
||
*/
|
||
#define G_TYPE_IS_OBJECT(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_OBJECT)
|
||
/**
|
||
* G_OBJECT:
|
||
* @object: Object which is subject to casting.
|
||
*
|
||
* Casts a #GObject or derived pointer into a (GObject*) pointer.
|
||
*
|
||
* Depending on the current debugging level, this function may invoke
|
||
* certain runtime checks to identify invalid casts.
|
||
*/
|
||
#define G_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_OBJECT, GObject))
|
||
/**
|
||
* G_OBJECT_CLASS:
|
||
* @class: a valid #GObjectClass
|
||
*
|
||
* Casts a derived #GObjectClass structure into a #GObjectClass structure.
|
||
*/
|
||
#define G_OBJECT_CLASS(class) (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_OBJECT, GObjectClass))
|
||
/**
|
||
* G_IS_OBJECT:
|
||
* @object: Instance to check for being a %G_TYPE_OBJECT.
|
||
*
|
||
* Checks whether a valid #GTypeInstance pointer is of type %G_TYPE_OBJECT.
|
||
*/
|
||
#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_42
|
||
#define G_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE ((object), G_TYPE_OBJECT))
|
||
#else
|
||
#define G_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_OBJECT))
|
||
#endif
|
||
/**
|
||
* G_IS_OBJECT_CLASS:
|
||
* @class: a #GObjectClass
|
||
*
|
||
* Checks whether @class "is a" valid #GObjectClass structure of type
|
||
* %G_TYPE_OBJECT or derived.
|
||
*/
|
||
#define G_IS_OBJECT_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_OBJECT))
|
||
/**
|
||
* G_OBJECT_GET_CLASS:
|
||
* @object: a #GObject instance.
|
||
*
|
||
* Get the class structure associated to a #GObject instance.
|
||
*
|
||
* Returns: pointer to object class structure.
|
||
*/
|
||
#define G_OBJECT_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_OBJECT, GObjectClass))
|
||
/**
|
||
* G_OBJECT_TYPE:
|
||
* @object: Object to return the type id for.
|
||
*
|
||
* Get the type id of an object.
|
||
*
|
||
* Returns: Type id of @object.
|
||
*/
|
||
#define G_OBJECT_TYPE(object) (G_TYPE_FROM_INSTANCE (object))
|
||
/**
|
||
* G_OBJECT_TYPE_NAME:
|
||
* @object: Object to return the type name for.
|
||
*
|
||
* Get the name of an object's type.
|
||
*
|
||
* Returns: Type name of @object. The string is owned by the type system and
|
||
* should not be freed.
|
||
*/
|
||
#define G_OBJECT_TYPE_NAME(object) (g_type_name (G_OBJECT_TYPE (object)))
|
||
/**
|
||
* G_OBJECT_CLASS_TYPE:
|
||
* @class: a valid #GObjectClass
|
||
*
|
||
* Get the type id of a class structure.
|
||
*
|
||
* Returns: Type id of @class.
|
||
*/
|
||
#define G_OBJECT_CLASS_TYPE(class) (G_TYPE_FROM_CLASS (class))
|
||
/**
|
||
* G_OBJECT_CLASS_NAME:
|
||
* @class: a valid #GObjectClass
|
||
*
|
||
* Return the name of a class structure's type.
|
||
*
|
||
* Returns: Type name of @class. The string is owned by the type system and
|
||
* should not be freed.
|
||
*/
|
||
#define G_OBJECT_CLASS_NAME(class) (g_type_name (G_OBJECT_CLASS_TYPE (class)))
|
||
/**
|
||
* G_VALUE_HOLDS_OBJECT:
|
||
* @value: a valid #GValue structure
|
||
*
|
||
* Checks whether the given #GValue can hold values derived from type %G_TYPE_OBJECT.
|
||
*
|
||
* Returns: %TRUE on success.
|
||
*/
|
||
#define G_VALUE_HOLDS_OBJECT(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_OBJECT))
|
||
|
||
/* --- type macros --- */
|
||
/**
|
||
* G_TYPE_INITIALLY_UNOWNED:
|
||
*
|
||
* The type for #GInitiallyUnowned.
|
||
*/
|
||
#define G_TYPE_INITIALLY_UNOWNED (g_initially_unowned_get_type())
|
||
/**
|
||
* G_INITIALLY_UNOWNED:
|
||
* @object: Object which is subject to casting.
|
||
*
|
||
* Casts a #GInitiallyUnowned or derived pointer into a (GInitiallyUnowned*)
|
||
* pointer.
|
||
*
|
||
* Depending on the current debugging level, this function may invoke
|
||
* certain runtime checks to identify invalid casts.
|
||
*/
|
||
#define G_INITIALLY_UNOWNED(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_INITIALLY_UNOWNED, GInitiallyUnowned))
|
||
/**
|
||
* G_INITIALLY_UNOWNED_CLASS:
|
||
* @class: a valid #GInitiallyUnownedClass
|
||
*
|
||
* Casts a derived #GInitiallyUnownedClass structure into a
|
||
* #GInitiallyUnownedClass structure.
|
||
*/
|
||
#define G_INITIALLY_UNOWNED_CLASS(class) (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_INITIALLY_UNOWNED, GInitiallyUnownedClass))
|
||
/**
|
||
* G_IS_INITIALLY_UNOWNED:
|
||
* @object: Instance to check for being a %G_TYPE_INITIALLY_UNOWNED.
|
||
*
|
||
* Checks whether a valid #GTypeInstance pointer is of type %G_TYPE_INITIALLY_UNOWNED.
|
||
*/
|
||
#define G_IS_INITIALLY_UNOWNED(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_INITIALLY_UNOWNED))
|
||
/**
|
||
* G_IS_INITIALLY_UNOWNED_CLASS:
|
||
* @class: a #GInitiallyUnownedClass
|
||
*
|
||
* Checks whether @class "is a" valid #GInitiallyUnownedClass structure of type
|
||
* %G_TYPE_INITIALLY_UNOWNED or derived.
|
||
*/
|
||
#define G_IS_INITIALLY_UNOWNED_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_INITIALLY_UNOWNED))
|
||
/**
|
||
* G_INITIALLY_UNOWNED_GET_CLASS:
|
||
* @object: a #GInitiallyUnowned instance.
|
||
*
|
||
* Get the class structure associated to a #GInitiallyUnowned instance.
|
||
*
|
||
* Returns: pointer to object class structure.
|
||
*/
|
||
#define G_INITIALLY_UNOWNED_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_INITIALLY_UNOWNED, GInitiallyUnownedClass))
|
||
/* GInitiallyUnowned ia a GObject with initially floating reference count */
|
||
|
||
|
||
/* --- typedefs & structures --- */
|
||
typedef struct _GObject GObject;
|
||
typedef struct _GObjectClass GObjectClass;
|
||
typedef struct _GObject GInitiallyUnowned;
|
||
typedef struct _GObjectClass GInitiallyUnownedClass;
|
||
typedef struct _GObjectConstructParam GObjectConstructParam;
|
||
/**
|
||
* GObjectGetPropertyFunc:
|
||
* @object: a #GObject
|
||
* @property_id: the numeric id under which the property was registered with
|
||
* g_object_class_install_property().
|
||
* @value: a #GValue to return the property value in
|
||
* @pspec: the #GParamSpec describing the property
|
||
*
|
||
* The type of the @get_property function of #GObjectClass.
|
||
*/
|
||
typedef void (*GObjectGetPropertyFunc) (GObject *object,
|
||
guint property_id,
|
||
GValue *value,
|
||
GParamSpec *pspec);
|
||
/**
|
||
* GObjectSetPropertyFunc:
|
||
* @object: a #GObject
|
||
* @property_id: the numeric id under which the property was registered with
|
||
* g_object_class_install_property().
|
||
* @value: the new value for the property
|
||
* @pspec: the #GParamSpec describing the property
|
||
*
|
||
* The type of the @set_property function of #GObjectClass.
|
||
*/
|
||
typedef void (*GObjectSetPropertyFunc) (GObject *object,
|
||
guint property_id,
|
||
const GValue *value,
|
||
GParamSpec *pspec);
|
||
/**
|
||
* GObjectFinalizeFunc:
|
||
* @object: the #GObject being finalized
|
||
*
|
||
* The type of the @finalize function of #GObjectClass.
|
||
*/
|
||
typedef void (*GObjectFinalizeFunc) (GObject *object);
|
||
/**
|
||
* GWeakNotify:
|
||
* @data: data that was provided when the weak reference was established
|
||
* @where_the_object_was: the object being disposed
|
||
*
|
||
* A #GWeakNotify function can be added to an object as a callback that gets
|
||
* triggered when the object is finalized.
|
||
*
|
||
* Since the object is already being disposed when the #GWeakNotify is called,
|
||
* there's not much you could do with the object, apart from e.g. using its
|
||
* address as hash-index or the like.
|
||
*
|
||
* In particular, this means it’s invalid to call g_object_ref(),
|
||
* g_weak_ref_init(), g_weak_ref_set(), g_object_add_toggle_ref(),
|
||
* g_object_weak_ref(), g_object_add_weak_pointer() or any function which calls
|
||
* them on the object from this callback.
|
||
*/
|
||
typedef void (*GWeakNotify) (gpointer data,
|
||
GObject *where_the_object_was);
|
||
|
||
struct _GObject
|
||
{
|
||
GTypeInstance g_type_instance;
|
||
|
||
/*< private >*/
|
||
guint ref_count; /* (atomic) */
|
||
GData *qdata;
|
||
};
|
||
/**
|
||
* GObjectClass:
|
||
* @g_type_class: the parent class
|
||
* @constructor: the @constructor function is called by g_object_new () to
|
||
* complete the object initialization after all the construction properties are
|
||
* set. The first thing a @constructor implementation must do is chain up to the
|
||
* @constructor of the parent class. Overriding @constructor should be rarely
|
||
* needed, e.g. to handle construct properties, or to implement singletons.
|
||
* @set_property: the generic setter for all properties of this type. Should be
|
||
* overridden for every type with properties. If implementations of
|
||
* @set_property don't emit property change notification explicitly, this will
|
||
* be done implicitly by the type system. However, if the notify signal is
|
||
* emitted explicitly, the type system will not emit it a second time.
|
||
* @get_property: the generic getter for all properties of this type. Should be
|
||
* overridden for every type with properties.
|
||
* @dispose: the @dispose function is supposed to drop all references to other
|
||
* objects, but keep the instance otherwise intact, so that client method
|
||
* invocations still work. It may be run multiple times (due to reference
|
||
* loops). Before returning, @dispose should chain up to the @dispose method
|
||
* of the parent class.
|
||
* @finalize: instance finalization function, should finish the finalization of
|
||
* the instance begun in @dispose and chain up to the @finalize method of the
|
||
* parent class.
|
||
* @dispatch_properties_changed: emits property change notification for a bunch
|
||
* of properties. Overriding @dispatch_properties_changed should be rarely
|
||
* needed.
|
||
* @notify: the class closure for the notify signal
|
||
* @constructed: the @constructed function is called by g_object_new() as the
|
||
* final step of the object creation process. At the point of the call, all
|
||
* construction properties have been set on the object. The purpose of this
|
||
* call is to allow for object initialisation steps that can only be performed
|
||
* after construction properties have been set. @constructed implementors
|
||
* should chain up to the @constructed call of their parent class to allow it
|
||
* to complete its initialisation.
|
||
*
|
||
* The class structure for the GObject type.
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* // Example of implementing a singleton using a constructor.
|
||
* static MySingleton *the_singleton = NULL;
|
||
*
|
||
* static GObject*
|
||
* my_singleton_constructor (GType type,
|
||
* guint n_construct_params,
|
||
* GObjectConstructParam *construct_params)
|
||
* {
|
||
* GObject *object;
|
||
*
|
||
* if (!the_singleton)
|
||
* {
|
||
* object = G_OBJECT_CLASS (parent_class)->constructor (type,
|
||
* n_construct_params,
|
||
* construct_params);
|
||
* the_singleton = MY_SINGLETON (object);
|
||
* }
|
||
* else
|
||
* object = g_object_ref (G_OBJECT (the_singleton));
|
||
*
|
||
* return object;
|
||
* }
|
||
* ]|
|
||
*/
|
||
struct _GObjectClass
|
||
{
|
||
GTypeClass g_type_class;
|
||
|
||
/*< private >*/
|
||
GSList *construct_properties;
|
||
|
||
/*< public >*/
|
||
/* seldom overridden */
|
||
GObject* (*constructor) (GType type,
|
||
guint n_construct_properties,
|
||
GObjectConstructParam *construct_properties);
|
||
/* overridable methods */
|
||
void (*set_property) (GObject *object,
|
||
guint property_id,
|
||
const GValue *value,
|
||
GParamSpec *pspec);
|
||
void (*get_property) (GObject *object,
|
||
guint property_id,
|
||
GValue *value,
|
||
GParamSpec *pspec);
|
||
void (*dispose) (GObject *object);
|
||
void (*finalize) (GObject *object);
|
||
/* seldom overridden */
|
||
void (*dispatch_properties_changed) (GObject *object,
|
||
guint n_pspecs,
|
||
GParamSpec **pspecs);
|
||
/* signals */
|
||
void (*notify) (GObject *object,
|
||
GParamSpec *pspec);
|
||
|
||
/* called when done constructing */
|
||
void (*constructed) (GObject *object);
|
||
|
||
/*< private >*/
|
||
gsize flags;
|
||
|
||
gsize n_construct_properties;
|
||
|
||
gpointer pspecs;
|
||
gsize n_pspecs;
|
||
|
||
/* padding */
|
||
gpointer pdummy[3];
|
||
};
|
||
|
||
/**
|
||
* GObjectConstructParam:
|
||
* @pspec: the #GParamSpec of the construct parameter
|
||
* @value: the value to set the parameter to
|
||
*
|
||
* The GObjectConstructParam struct is an auxiliary structure used to hand
|
||
* #GParamSpec/#GValue pairs to the @constructor of a #GObjectClass.
|
||
*/
|
||
struct _GObjectConstructParam
|
||
{
|
||
GParamSpec *pspec;
|
||
GValue *value;
|
||
};
|
||
|
||
/**
|
||
* GInitiallyUnowned:
|
||
*
|
||
* A type for objects that have an initially floating reference.
|
||
*
|
||
* All the fields in the `GInitiallyUnowned` structure are private to the
|
||
* implementation and should never be accessed directly.
|
||
*/
|
||
/**
|
||
* GInitiallyUnownedClass:
|
||
*
|
||
* The class structure for the GInitiallyUnowned type.
|
||
*/
|
||
|
||
|
||
/* --- prototypes --- */
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_initially_unowned_get_type (void);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_class_install_property (GObjectClass *oclass,
|
||
guint property_id,
|
||
GParamSpec *pspec);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GParamSpec* g_object_class_find_property (GObjectClass *oclass,
|
||
const gchar *property_name);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GParamSpec**g_object_class_list_properties (GObjectClass *oclass,
|
||
guint *n_properties);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_class_override_property (GObjectClass *oclass,
|
||
guint property_id,
|
||
const gchar *name);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_class_install_properties (GObjectClass *oclass,
|
||
guint n_pspecs,
|
||
GParamSpec **pspecs);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_interface_install_property (gpointer g_iface,
|
||
GParamSpec *pspec);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GParamSpec* g_object_interface_find_property (gpointer g_iface,
|
||
const gchar *property_name);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GParamSpec**g_object_interface_list_properties (gpointer g_iface,
|
||
guint *n_properties_p);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_object_get_type (void) G_GNUC_CONST;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_new (GType object_type,
|
||
const gchar *first_property_name,
|
||
...);
|
||
GOBJECT_AVAILABLE_IN_2_54
|
||
GObject* g_object_new_with_properties (GType object_type,
|
||
guint n_properties,
|
||
const char *names[],
|
||
const GValue values[]);
|
||
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
||
|
||
GOBJECT_DEPRECATED_IN_2_54_FOR(g_object_new_with_properties)
|
||
gpointer g_object_newv (GType object_type,
|
||
guint n_parameters,
|
||
GParameter *parameters);
|
||
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GObject* g_object_new_valist (GType object_type,
|
||
const gchar *first_property_name,
|
||
va_list var_args);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_set (gpointer object,
|
||
const gchar *first_property_name,
|
||
...) G_GNUC_NULL_TERMINATED;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_get (gpointer object,
|
||
const gchar *first_property_name,
|
||
...) G_GNUC_NULL_TERMINATED;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_connect (gpointer object,
|
||
const gchar *signal_spec,
|
||
...) G_GNUC_NULL_TERMINATED;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_disconnect (gpointer object,
|
||
const gchar *signal_spec,
|
||
...) G_GNUC_NULL_TERMINATED;
|
||
GOBJECT_AVAILABLE_IN_2_54
|
||
void g_object_setv (GObject *object,
|
||
guint n_properties,
|
||
const gchar *names[],
|
||
const GValue values[]);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_set_valist (GObject *object,
|
||
const gchar *first_property_name,
|
||
va_list var_args);
|
||
GOBJECT_AVAILABLE_IN_2_54
|
||
void g_object_getv (GObject *object,
|
||
guint n_properties,
|
||
const gchar *names[],
|
||
GValue values[]);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_get_valist (GObject *object,
|
||
const gchar *first_property_name,
|
||
va_list var_args);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_set_property (GObject *object,
|
||
const gchar *property_name,
|
||
const GValue *value);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_get_property (GObject *object,
|
||
const gchar *property_name,
|
||
GValue *value);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_freeze_notify (GObject *object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_notify (GObject *object,
|
||
const gchar *property_name);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_notify_by_pspec (GObject *object,
|
||
GParamSpec *pspec);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_thaw_notify (GObject *object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_object_is_floating (gpointer object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_ref_sink (gpointer object);
|
||
GOBJECT_AVAILABLE_IN_2_70
|
||
gpointer g_object_take_ref (gpointer object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_ref (gpointer object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_unref (gpointer object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_weak_ref (GObject *object,
|
||
GWeakNotify notify,
|
||
gpointer data);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_weak_unref (GObject *object,
|
||
GWeakNotify notify,
|
||
gpointer data);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_add_weak_pointer (GObject *object,
|
||
gpointer *weak_pointer_location);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_remove_weak_pointer (GObject *object,
|
||
gpointer *weak_pointer_location);
|
||
|
||
#if defined(glib_typeof) && GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_56
|
||
/* Make reference APIs type safe with macros */
|
||
#define g_object_ref(Obj) ((glib_typeof (Obj)) (g_object_ref) (Obj))
|
||
#define g_object_ref_sink(Obj) ((glib_typeof (Obj)) (g_object_ref_sink) (Obj))
|
||
#endif
|
||
|
||
/**
|
||
* GToggleNotify:
|
||
* @data: Callback data passed to g_object_add_toggle_ref()
|
||
* @object: The object on which g_object_add_toggle_ref() was called.
|
||
* @is_last_ref: %TRUE if the toggle reference is now the
|
||
* last reference to the object. %FALSE if the toggle
|
||
* reference was the last reference and there are now other
|
||
* references.
|
||
*
|
||
* A callback function used for notification when the state
|
||
* of a toggle reference changes.
|
||
*
|
||
* See also: g_object_add_toggle_ref()
|
||
*/
|
||
typedef void (*GToggleNotify) (gpointer data,
|
||
GObject *object,
|
||
gboolean is_last_ref);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_add_toggle_ref (GObject *object,
|
||
GToggleNotify notify,
|
||
gpointer data);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_remove_toggle_ref (GObject *object,
|
||
GToggleNotify notify,
|
||
gpointer data);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_get_qdata (GObject *object,
|
||
GQuark quark);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_set_qdata (GObject *object,
|
||
GQuark quark,
|
||
gpointer data);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_set_qdata_full (GObject *object,
|
||
GQuark quark,
|
||
gpointer data,
|
||
GDestroyNotify destroy);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_steal_qdata (GObject *object,
|
||
GQuark quark);
|
||
|
||
GOBJECT_AVAILABLE_IN_2_34
|
||
gpointer g_object_dup_qdata (GObject *object,
|
||
GQuark quark,
|
||
GDuplicateFunc dup_func,
|
||
gpointer user_data);
|
||
GOBJECT_AVAILABLE_IN_2_34
|
||
gboolean g_object_replace_qdata (GObject *object,
|
||
GQuark quark,
|
||
gpointer oldval,
|
||
gpointer newval,
|
||
GDestroyNotify destroy,
|
||
GDestroyNotify *old_destroy);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_get_data (GObject *object,
|
||
const gchar *key);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_set_data (GObject *object,
|
||
const gchar *key,
|
||
gpointer data);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_set_data_full (GObject *object,
|
||
const gchar *key,
|
||
gpointer data,
|
||
GDestroyNotify destroy);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_object_steal_data (GObject *object,
|
||
const gchar *key);
|
||
|
||
GOBJECT_AVAILABLE_IN_2_34
|
||
gpointer g_object_dup_data (GObject *object,
|
||
const gchar *key,
|
||
GDuplicateFunc dup_func,
|
||
gpointer user_data);
|
||
GOBJECT_AVAILABLE_IN_2_34
|
||
gboolean g_object_replace_data (GObject *object,
|
||
const gchar *key,
|
||
gpointer oldval,
|
||
gpointer newval,
|
||
GDestroyNotify destroy,
|
||
GDestroyNotify *old_destroy);
|
||
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_watch_closure (GObject *object,
|
||
GClosure *closure);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GClosure* g_cclosure_new_object (GCallback callback_func,
|
||
GObject *object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GClosure* g_cclosure_new_object_swap (GCallback callback_func,
|
||
GObject *object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GClosure* g_closure_new_object (guint sizeof_closure,
|
||
GObject *object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_value_set_object (GValue *value,
|
||
gpointer v_object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_value_get_object (const GValue *value);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_value_dup_object (const GValue *value);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gulong g_signal_connect_object (gpointer instance,
|
||
const gchar *detailed_signal,
|
||
GCallback c_handler,
|
||
gpointer gobject,
|
||
GConnectFlags connect_flags);
|
||
|
||
/*< protected >*/
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_force_floating (GObject *object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_object_run_dispose (GObject *object);
|
||
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_value_take_object (GValue *value,
|
||
gpointer v_object);
|
||
GOBJECT_DEPRECATED_FOR(g_value_take_object)
|
||
void g_value_set_object_take_ownership (GValue *value,
|
||
gpointer v_object);
|
||
|
||
GOBJECT_DEPRECATED
|
||
gsize g_object_compat_control (gsize what,
|
||
gpointer data);
|
||
|
||
/* --- implementation macros --- */
|
||
#define G_OBJECT_WARN_INVALID_PSPEC(object, pname, property_id, pspec) \
|
||
G_STMT_START { \
|
||
GObject *_glib__object = (GObject*) (object); \
|
||
GParamSpec *_glib__pspec = (GParamSpec*) (pspec); \
|
||
guint _glib__property_id = (property_id); \
|
||
g_warning ("%s:%d: invalid %s id %u for \"%s\" of type '%s' in '%s'", \
|
||
__FILE__, __LINE__, \
|
||
(pname), \
|
||
_glib__property_id, \
|
||
_glib__pspec->name, \
|
||
g_type_name (G_PARAM_SPEC_TYPE (_glib__pspec)), \
|
||
G_OBJECT_TYPE_NAME (_glib__object)); \
|
||
} G_STMT_END
|
||
/**
|
||
* G_OBJECT_WARN_INVALID_PROPERTY_ID:
|
||
* @object: the #GObject on which set_property() or get_property() was called
|
||
* @property_id: the numeric id of the property
|
||
* @pspec: the #GParamSpec of the property
|
||
*
|
||
* This macro should be used to emit a standard warning about unexpected
|
||
* properties in set_property() and get_property() implementations.
|
||
*/
|
||
#define G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec) \
|
||
G_OBJECT_WARN_INVALID_PSPEC ((object), "property", (property_id), (pspec))
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_clear_object (GObject **object_ptr);
|
||
#define g_clear_object(object_ptr) g_clear_pointer ((object_ptr), g_object_unref)
|
||
|
||
/**
|
||
* g_set_object: (skip)
|
||
* @object_ptr: (inout) (not optional) (nullable): a pointer to a #GObject reference
|
||
* @new_object: (nullable) (transfer none): a pointer to the new #GObject to
|
||
* assign to @object_ptr, or %NULL to clear the pointer
|
||
*
|
||
* Updates a #GObject pointer to refer to @new_object.
|
||
*
|
||
* It increments the reference count of @new_object (if non-%NULL), decrements
|
||
* the reference count of the current value of @object_ptr (if non-%NULL), and
|
||
* assigns @new_object to @object_ptr. The assignment is not atomic.
|
||
*
|
||
* @object_ptr must not be %NULL, but can point to a %NULL value.
|
||
*
|
||
* A macro is also included that allows this function to be used without
|
||
* pointer casts. The function itself is static inline, so its address may vary
|
||
* between compilation units.
|
||
*
|
||
* One convenient usage of this function is in implementing property setters:
|
||
* |[
|
||
* void
|
||
* foo_set_bar (Foo *foo,
|
||
* Bar *new_bar)
|
||
* {
|
||
* g_return_if_fail (IS_FOO (foo));
|
||
* g_return_if_fail (new_bar == NULL || IS_BAR (new_bar));
|
||
*
|
||
* if (g_set_object (&foo->bar, new_bar))
|
||
* g_object_notify (foo, "bar");
|
||
* }
|
||
* ]|
|
||
*
|
||
* Returns: %TRUE if the value of @object_ptr changed, %FALSE otherwise
|
||
*
|
||
* Since: 2.44
|
||
*/
|
||
static inline gboolean
|
||
(g_set_object) (GObject **object_ptr,
|
||
GObject *new_object)
|
||
{
|
||
GObject *old_object = *object_ptr;
|
||
|
||
/* rely on g_object_[un]ref() to check the pointers are actually GObjects;
|
||
* elide a (object_ptr != NULL) check because most of the time we will be
|
||
* operating on struct members with a constant offset, so a NULL check would
|
||
* not catch bugs
|
||
*/
|
||
|
||
if (old_object == new_object)
|
||
return FALSE;
|
||
|
||
if (new_object != NULL)
|
||
g_object_ref (new_object);
|
||
|
||
*object_ptr = new_object;
|
||
|
||
if (old_object != NULL)
|
||
g_object_unref (old_object);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* We need GCC for __extension__, which we need to sort out strict aliasing of @object_ptr */
|
||
#if defined(__GNUC__)
|
||
|
||
#define g_set_object(object_ptr, new_object) \
|
||
(G_GNUC_EXTENSION ({ \
|
||
G_STATIC_ASSERT (sizeof *(object_ptr) == sizeof (new_object)); \
|
||
/* Only one access, please; work around type aliasing */ \
|
||
union { char *in; GObject **out; } _object_ptr; \
|
||
_object_ptr.in = (char *) (object_ptr); \
|
||
/* Check types match */ \
|
||
(void) (0 ? *(object_ptr) = (new_object), FALSE : FALSE); \
|
||
(g_set_object) (_object_ptr.out, (GObject *) new_object); \
|
||
})) \
|
||
GOBJECT_AVAILABLE_MACRO_IN_2_44
|
||
|
||
#else /* if !defined(__GNUC__) */
|
||
|
||
#define g_set_object(object_ptr, new_object) \
|
||
(/* Check types match. */ \
|
||
0 ? *(object_ptr) = (new_object), FALSE : \
|
||
(g_set_object) ((GObject **) (object_ptr), (GObject *) (new_object)) \
|
||
)
|
||
|
||
#endif /* !defined(__GNUC__) */
|
||
|
||
/**
|
||
* g_assert_finalize_object: (skip)
|
||
* @object: (transfer full) (type GObject.Object): an object
|
||
*
|
||
* Assert that @object is non-%NULL, then release one reference to it with
|
||
* g_object_unref() and assert that it has been finalized (i.e. that there
|
||
* are no more references).
|
||
*
|
||
* If assertions are disabled via `G_DISABLE_ASSERT`,
|
||
* this macro just calls g_object_unref() without any further checks.
|
||
*
|
||
* This macro should only be used in regression tests.
|
||
*
|
||
* Since: 2.62
|
||
*/
|
||
static inline void
|
||
(g_assert_finalize_object) (GObject *object)
|
||
{
|
||
gpointer weak_pointer = object;
|
||
|
||
g_assert_true (G_IS_OBJECT (weak_pointer));
|
||
g_object_add_weak_pointer (object, &weak_pointer);
|
||
g_object_unref (weak_pointer);
|
||
g_assert_null (weak_pointer);
|
||
}
|
||
|
||
#ifdef G_DISABLE_ASSERT
|
||
#define g_assert_finalize_object(object) g_object_unref (object)
|
||
#else
|
||
#define g_assert_finalize_object(object) (g_assert_finalize_object ((GObject *) object))
|
||
#endif
|
||
|
||
/**
|
||
* g_clear_weak_pointer: (skip)
|
||
* @weak_pointer_location: The memory address of a pointer
|
||
*
|
||
* Clears a weak reference to a #GObject.
|
||
*
|
||
* @weak_pointer_location must not be %NULL.
|
||
*
|
||
* If the weak reference is %NULL then this function does nothing.
|
||
* Otherwise, the weak reference to the object is removed for that location
|
||
* and the pointer is set to %NULL.
|
||
*
|
||
* A macro is also included that allows this function to be used without
|
||
* pointer casts. The function itself is static inline, so its address may vary
|
||
* between compilation units.
|
||
*
|
||
* Since: 2.56
|
||
*/
|
||
static inline void
|
||
(g_clear_weak_pointer) (gpointer *weak_pointer_location)
|
||
{
|
||
GObject *object = (GObject *) *weak_pointer_location;
|
||
|
||
if (object != NULL)
|
||
{
|
||
g_object_remove_weak_pointer (object, weak_pointer_location);
|
||
*weak_pointer_location = NULL;
|
||
}
|
||
}
|
||
|
||
#define g_clear_weak_pointer(weak_pointer_location) \
|
||
(/* Check types match. */ \
|
||
(g_clear_weak_pointer) ((gpointer *) (weak_pointer_location)) \
|
||
)
|
||
|
||
/**
|
||
* g_set_weak_pointer: (skip)
|
||
* @weak_pointer_location: the memory address of a pointer
|
||
* @new_object: (nullable) (transfer none): a pointer to the new #GObject to
|
||
* assign to it, or %NULL to clear the pointer
|
||
*
|
||
* Updates a pointer to weakly refer to @new_object.
|
||
*
|
||
* It assigns @new_object to @weak_pointer_location and ensures
|
||
* that @weak_pointer_location will automatically be set to %NULL
|
||
* if @new_object gets destroyed. The assignment is not atomic.
|
||
* The weak reference is not thread-safe, see g_object_add_weak_pointer()
|
||
* for details.
|
||
*
|
||
* The @weak_pointer_location argument must not be %NULL.
|
||
*
|
||
* A macro is also included that allows this function to be used without
|
||
* pointer casts. The function itself is static inline, so its address may vary
|
||
* between compilation units.
|
||
*
|
||
* One convenient usage of this function is in implementing property setters:
|
||
* |[
|
||
* void
|
||
* foo_set_bar (Foo *foo,
|
||
* Bar *new_bar)
|
||
* {
|
||
* g_return_if_fail (IS_FOO (foo));
|
||
* g_return_if_fail (new_bar == NULL || IS_BAR (new_bar));
|
||
*
|
||
* if (g_set_weak_pointer (&foo->bar, new_bar))
|
||
* g_object_notify (foo, "bar");
|
||
* }
|
||
* ]|
|
||
*
|
||
* Returns: %TRUE if the value of @weak_pointer_location changed, %FALSE otherwise
|
||
*
|
||
* Since: 2.56
|
||
*/
|
||
static inline gboolean
|
||
(g_set_weak_pointer) (gpointer *weak_pointer_location,
|
||
GObject *new_object)
|
||
{
|
||
GObject *old_object = (GObject *) *weak_pointer_location;
|
||
|
||
/* elide a (weak_pointer_location != NULL) check because most of the time we
|
||
* will be operating on struct members with a constant offset, so a NULL
|
||
* check would not catch bugs
|
||
*/
|
||
|
||
if (old_object == new_object)
|
||
return FALSE;
|
||
|
||
if (old_object != NULL)
|
||
g_object_remove_weak_pointer (old_object, weak_pointer_location);
|
||
|
||
*weak_pointer_location = new_object;
|
||
|
||
if (new_object != NULL)
|
||
g_object_add_weak_pointer (new_object, weak_pointer_location);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#define g_set_weak_pointer(weak_pointer_location, new_object) \
|
||
(/* Check types match. */ \
|
||
0 ? *(weak_pointer_location) = (new_object), FALSE : \
|
||
(g_set_weak_pointer) ((gpointer *) (weak_pointer_location), (GObject *) (new_object)) \
|
||
)
|
||
|
||
typedef struct {
|
||
/*<private>*/
|
||
union { gpointer p; } priv;
|
||
} GWeakRef;
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_weak_ref_init (GWeakRef *weak_ref,
|
||
gpointer object);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_weak_ref_clear (GWeakRef *weak_ref);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_weak_ref_get (GWeakRef *weak_ref);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_weak_ref_set (GWeakRef *weak_ref,
|
||
gpointer object);
|
||
|
||
G_END_DECLS
|
||
|
||
#endif /* __G_OBJECT_H__ */
|