mirror of https://gitee.com/openkylin/glib2.0.git
2737 lines
101 KiB
C
2737 lines
101 KiB
C
/* GObject - GLib Type, Object, Parameter and Signal Library
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||
* Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
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*
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||
* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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||
* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __G_TYPE_H__
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#define __G_TYPE_H__
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#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
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#error "Only <glib-object.h> can be included directly."
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#endif
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#include <glib.h>
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#include <gobject/gobject-visibility.h>
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G_BEGIN_DECLS
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/* Basic Type Macros
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*/
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/**
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* G_TYPE_FUNDAMENTAL:
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* @type: A #GType value.
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*
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* The fundamental type which is the ancestor of @type.
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*
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* Fundamental types are types that serve as ultimate bases for the derived types,
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* thus they are the roots of distinct inheritance hierarchies.
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*/
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#define G_TYPE_FUNDAMENTAL(type) (g_type_fundamental (type))
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/**
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* G_TYPE_FUNDAMENTAL_SHIFT:
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*
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* Shift value used in converting numbers to type IDs.
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*/
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#define G_TYPE_FUNDAMENTAL_SHIFT (2)
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/**
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* G_TYPE_FUNDAMENTAL_MAX: (value 1020)
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*
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* An integer constant that represents the number of identifiers reserved
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* for types that are assigned at compile-time.
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*/
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#define G_TYPE_FUNDAMENTAL_MAX (255 << G_TYPE_FUNDAMENTAL_SHIFT)
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/* Constant fundamental types,
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*/
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/**
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* G_TYPE_INVALID:
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*
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* An invalid #GType used as error return value in some functions which return
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* a #GType.
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*/
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#define G_TYPE_INVALID G_TYPE_MAKE_FUNDAMENTAL (0)
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/**
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* G_TYPE_NONE:
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*
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* A fundamental type which is used as a replacement for the C
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* void return type.
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*/
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#define G_TYPE_NONE G_TYPE_MAKE_FUNDAMENTAL (1)
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/**
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* G_TYPE_INTERFACE:
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*
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* The fundamental type from which all interfaces are derived.
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*/
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#define G_TYPE_INTERFACE G_TYPE_MAKE_FUNDAMENTAL (2)
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/**
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* G_TYPE_CHAR:
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*
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* The fundamental type corresponding to #gchar.
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*
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* The type designated by %G_TYPE_CHAR is unconditionally an 8-bit signed integer.
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* This may or may not be the same type a the C type "gchar".
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*/
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#define G_TYPE_CHAR G_TYPE_MAKE_FUNDAMENTAL (3)
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/**
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* G_TYPE_UCHAR:
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*
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* The fundamental type corresponding to #guchar.
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*/
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#define G_TYPE_UCHAR G_TYPE_MAKE_FUNDAMENTAL (4)
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/**
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* G_TYPE_BOOLEAN:
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*
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* The fundamental type corresponding to #gboolean.
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*/
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#define G_TYPE_BOOLEAN G_TYPE_MAKE_FUNDAMENTAL (5)
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/**
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* G_TYPE_INT:
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*
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* The fundamental type corresponding to #gint.
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*/
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#define G_TYPE_INT G_TYPE_MAKE_FUNDAMENTAL (6)
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/**
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* G_TYPE_UINT:
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*
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* The fundamental type corresponding to #guint.
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*/
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#define G_TYPE_UINT G_TYPE_MAKE_FUNDAMENTAL (7)
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/**
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* G_TYPE_LONG:
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*
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* The fundamental type corresponding to #glong.
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*/
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#define G_TYPE_LONG G_TYPE_MAKE_FUNDAMENTAL (8)
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/**
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* G_TYPE_ULONG:
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*
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* The fundamental type corresponding to #gulong.
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*/
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#define G_TYPE_ULONG G_TYPE_MAKE_FUNDAMENTAL (9)
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/**
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* G_TYPE_INT64:
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*
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* The fundamental type corresponding to #gint64.
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*/
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#define G_TYPE_INT64 G_TYPE_MAKE_FUNDAMENTAL (10)
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/**
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* G_TYPE_UINT64:
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*
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* The fundamental type corresponding to #guint64.
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*/
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#define G_TYPE_UINT64 G_TYPE_MAKE_FUNDAMENTAL (11)
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/**
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* G_TYPE_ENUM:
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*
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* The fundamental type from which all enumeration types are derived.
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*/
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#define G_TYPE_ENUM G_TYPE_MAKE_FUNDAMENTAL (12)
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/**
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* G_TYPE_FLAGS:
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*
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* The fundamental type from which all flags types are derived.
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*/
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#define G_TYPE_FLAGS G_TYPE_MAKE_FUNDAMENTAL (13)
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/**
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* G_TYPE_FLOAT:
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*
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* The fundamental type corresponding to #gfloat.
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*/
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#define G_TYPE_FLOAT G_TYPE_MAKE_FUNDAMENTAL (14)
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/**
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* G_TYPE_DOUBLE:
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*
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* The fundamental type corresponding to #gdouble.
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*/
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#define G_TYPE_DOUBLE G_TYPE_MAKE_FUNDAMENTAL (15)
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/**
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* G_TYPE_STRING:
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*
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* The fundamental type corresponding to nul-terminated C strings.
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*/
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#define G_TYPE_STRING G_TYPE_MAKE_FUNDAMENTAL (16)
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/**
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* G_TYPE_POINTER:
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*
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* The fundamental type corresponding to #gpointer.
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*/
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#define G_TYPE_POINTER G_TYPE_MAKE_FUNDAMENTAL (17)
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/**
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* G_TYPE_BOXED:
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*
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* The fundamental type from which all boxed types are derived.
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*/
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#define G_TYPE_BOXED G_TYPE_MAKE_FUNDAMENTAL (18)
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/**
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* G_TYPE_PARAM:
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*
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* The fundamental type from which all #GParamSpec types are derived.
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*/
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#define G_TYPE_PARAM G_TYPE_MAKE_FUNDAMENTAL (19)
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/**
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* G_TYPE_OBJECT:
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*
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* The fundamental type for #GObject.
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*/
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#define G_TYPE_OBJECT G_TYPE_MAKE_FUNDAMENTAL (20)
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/**
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* G_TYPE_VARIANT:
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*
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* The fundamental type corresponding to #GVariant.
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*
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* All floating #GVariant instances passed through the #GType system are
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* consumed.
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*
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* Note that callbacks in closures, and signal handlers
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* for signals of return type %G_TYPE_VARIANT, must never return floating
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* variants.
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*
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* Note: GLib 2.24 did include a boxed type with this name. It was replaced
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* with this fundamental type in 2.26.
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*
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* Since: 2.26
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*/
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#define G_TYPE_VARIANT G_TYPE_MAKE_FUNDAMENTAL (21)
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/* Reserved fundamental type numbers to create new fundamental
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* type IDs with G_TYPE_MAKE_FUNDAMENTAL().
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*
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* Open an issue on https://gitlab.gnome.org/GNOME/glib/issues/new for
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* reservations.
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*/
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/**
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* G_TYPE_MAKE_FUNDAMENTAL:
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* @x: the fundamental type number.
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*
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* Get the type ID for the fundamental type number @x.
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*
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* Use g_type_fundamental_next() instead of this macro to create new fundamental
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* types.
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*
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* Returns: the GType
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*/
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#define G_TYPE_MAKE_FUNDAMENTAL(x) ((GType) ((x) << G_TYPE_FUNDAMENTAL_SHIFT))
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/**
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* G_TYPE_RESERVED_GLIB_FIRST:
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*
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* First fundamental type number to create a new fundamental type id with
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* G_TYPE_MAKE_FUNDAMENTAL() reserved for GLib.
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*/
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#define G_TYPE_RESERVED_GLIB_FIRST (22)
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/**
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* G_TYPE_RESERVED_GLIB_LAST:
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*
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* Last fundamental type number reserved for GLib.
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*/
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#define G_TYPE_RESERVED_GLIB_LAST (31)
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/**
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* G_TYPE_RESERVED_BSE_FIRST:
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*
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* First fundamental type number to create a new fundamental type id with
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* G_TYPE_MAKE_FUNDAMENTAL() reserved for BSE.
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*/
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#define G_TYPE_RESERVED_BSE_FIRST (32)
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/**
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* G_TYPE_RESERVED_BSE_LAST:
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*
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* Last fundamental type number reserved for BSE.
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*/
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#define G_TYPE_RESERVED_BSE_LAST (48)
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/**
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* G_TYPE_RESERVED_USER_FIRST:
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*
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* First available fundamental type number to create new fundamental
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* type id with G_TYPE_MAKE_FUNDAMENTAL().
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*/
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#define G_TYPE_RESERVED_USER_FIRST (49)
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/* Type Checking Macros
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*/
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/**
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* G_TYPE_IS_FUNDAMENTAL:
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* @type: A #GType value
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*
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* Checks if @type is a fundamental type.
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*
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* Returns: %TRUE is @type is fundamental
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*/
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#define G_TYPE_IS_FUNDAMENTAL(type) ((type) <= G_TYPE_FUNDAMENTAL_MAX)
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/**
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* G_TYPE_IS_DERIVED:
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* @type: A #GType value
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*
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* Checks if @type is derived (or in object-oriented terminology:
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* inherited) from another type (this holds true for all non-fundamental
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* types).
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*
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* Returns: %TRUE if @type is derived
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*/
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#define G_TYPE_IS_DERIVED(type) ((type) > G_TYPE_FUNDAMENTAL_MAX)
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/**
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* G_TYPE_IS_INTERFACE:
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* @type: A #GType value
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*
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* Checks if @type is an interface type.
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*
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* An interface type provides a pure API, the implementation
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* of which is provided by another type (which is then said to conform
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* to the interface). GLib interfaces are somewhat analogous to Java
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* interfaces and C++ classes containing only pure virtual functions,
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* with the difference that GType interfaces are not derivable (but see
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* g_type_interface_add_prerequisite() for an alternative).
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*
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* Returns: %TRUE if @type is an interface
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*/
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#define G_TYPE_IS_INTERFACE(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_INTERFACE)
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/**
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* G_TYPE_IS_CLASSED:
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* @type: A #GType value
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*
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* Checks if @type is a classed type.
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*
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* A classed type has an associated #GTypeClass which can be derived to store
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* class-wide virtual function pointers and data for all instances of the type.
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* This allows for subclassing. All #GObjects are classed; none of the scalar
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* fundamental types built into GLib are classed.
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*
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* Interfaces are not classed: while their #GTypeInterface struct could be
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* considered similar to #GTypeClass, and classes can derive interfaces,
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* #GTypeInterface doesn’t allow for subclassing.
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*
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* Returns: %TRUE if @type is classed
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*/
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#define G_TYPE_IS_CLASSED(type) (g_type_test_flags ((type), G_TYPE_FLAG_CLASSED))
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/**
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* G_TYPE_IS_INSTANTIATABLE:
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* @type: A #GType value
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*
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* Checks if @type can be instantiated. Instantiation is the
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* process of creating an instance (object) of this type.
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*
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* Returns: %TRUE if @type is instantiatable
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*/
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#define G_TYPE_IS_INSTANTIATABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_INSTANTIATABLE))
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/**
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* G_TYPE_IS_DERIVABLE:
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* @type: A #GType value
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*
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* Checks if @type is a derivable type. A derivable type can
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* be used as the base class of a flat (single-level) class hierarchy.
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*
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* Returns: %TRUE if @type is derivable
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*/
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#define G_TYPE_IS_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DERIVABLE))
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/**
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* G_TYPE_IS_DEEP_DERIVABLE:
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* @type: A #GType value
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*
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* Checks if @type is a deep derivable type. A deep derivable type
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* can be used as the base class of a deep (multi-level) class hierarchy.
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*
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* Returns: %TRUE if @type is deep derivable
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*/
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#define G_TYPE_IS_DEEP_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DEEP_DERIVABLE))
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/**
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* G_TYPE_IS_ABSTRACT:
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* @type: A #GType value
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*
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* Checks if @type is an abstract type. An abstract type cannot be
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* instantiated and is normally used as an abstract base class for
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* derived classes.
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*
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* Returns: %TRUE if @type is abstract
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*/
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#define G_TYPE_IS_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_ABSTRACT))
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/**
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* G_TYPE_IS_VALUE_ABSTRACT:
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* @type: A #GType value
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*
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* Checks if @type is an abstract value type. An abstract value type introduces
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* a value table, but can't be used for g_value_init() and is normally used as
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* an abstract base type for derived value types.
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*
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* Returns: %TRUE if @type is an abstract value type
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*/
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#define G_TYPE_IS_VALUE_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_VALUE_ABSTRACT))
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/**
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* G_TYPE_IS_VALUE_TYPE:
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* @type: A #GType value
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*
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* Checks if @type is a value type and can be used with g_value_init().
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*
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* Returns: %TRUE if @type is a value type
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*/
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#define G_TYPE_IS_VALUE_TYPE(type) (g_type_check_is_value_type (type))
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/**
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* G_TYPE_HAS_VALUE_TABLE:
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* @type: A #GType value
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*
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* Checks if @type has a #GTypeValueTable.
|
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*
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* Returns: %TRUE if @type has a value table
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*/
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#define G_TYPE_HAS_VALUE_TABLE(type) (g_type_value_table_peek (type) != NULL)
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/**
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* G_TYPE_IS_FINAL:
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* @type: a #GType value
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*
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* Checks if @type is a final type. A final type cannot be derived any
|
||
* further.
|
||
*
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* Returns: %TRUE if @type is final
|
||
*
|
||
* Since: 2.70
|
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*/
|
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#define G_TYPE_IS_FINAL(type) (g_type_test_flags ((type), G_TYPE_FLAG_FINAL)) GOBJECT_AVAILABLE_MACRO_IN_2_70
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|
||
/**
|
||
* G_TYPE_IS_DEPRECATED:
|
||
* @type: a #GType value
|
||
*
|
||
* Checks if @type is deprecated. Instantiating a deprecated type will
|
||
* trigger a warning if running with `G_ENABLE_DIAGNOSTIC=1`.
|
||
*
|
||
* Returns: %TRUE if the type is deprecated
|
||
*
|
||
* Since: 2.76
|
||
*/
|
||
#define G_TYPE_IS_DEPRECATED(type) (g_type_test_flags ((type), G_TYPE_FLAG_DEPRECATED)) GOBJECT_AVAILABLE_MACRO_IN_2_76
|
||
|
||
|
||
/* Typedefs
|
||
*/
|
||
/**
|
||
* GType:
|
||
*
|
||
* A numerical value which represents the unique identifier of a registered
|
||
* type.
|
||
*/
|
||
#if GLIB_SIZEOF_VOID_P > GLIB_SIZEOF_SIZE_T
|
||
typedef guintptr GType;
|
||
#elif GLIB_SIZEOF_SIZE_T != GLIB_SIZEOF_LONG || !defined (G_CXX_STD_VERSION)
|
||
typedef gsize GType;
|
||
#else /* for historic reasons, C++ on non-Morello/CHERI systems links against gulong GTypes */
|
||
typedef gulong GType;
|
||
#endif
|
||
typedef struct _GValue GValue;
|
||
typedef union _GTypeCValue GTypeCValue;
|
||
typedef struct _GTypePlugin GTypePlugin;
|
||
typedef struct _GTypeClass GTypeClass;
|
||
typedef struct _GTypeInterface GTypeInterface;
|
||
typedef struct _GTypeInstance GTypeInstance;
|
||
typedef struct _GTypeInfo GTypeInfo;
|
||
typedef struct _GTypeFundamentalInfo GTypeFundamentalInfo;
|
||
typedef struct _GInterfaceInfo GInterfaceInfo;
|
||
typedef struct _GTypeValueTable GTypeValueTable;
|
||
typedef struct _GTypeQuery GTypeQuery;
|
||
|
||
|
||
/* Basic Type Structures
|
||
*/
|
||
/**
|
||
* GTypeClass:
|
||
*
|
||
* An opaque structure used as the base of all classes.
|
||
*/
|
||
struct _GTypeClass
|
||
{
|
||
/*< private >*/
|
||
GType g_type;
|
||
};
|
||
/**
|
||
* GTypeInstance:
|
||
*
|
||
* An opaque structure used as the base of all type instances.
|
||
*/
|
||
struct _GTypeInstance
|
||
{
|
||
/*< private >*/
|
||
GTypeClass *g_class;
|
||
};
|
||
/**
|
||
* GTypeInterface:
|
||
*
|
||
* An opaque structure used as the base of all interface types.
|
||
*/
|
||
struct _GTypeInterface
|
||
{
|
||
/*< private >*/
|
||
GType g_type; /* iface type */
|
||
GType g_instance_type;
|
||
};
|
||
/**
|
||
* GTypeQuery:
|
||
* @type: the #GType value of the type
|
||
* @type_name: the name of the type
|
||
* @class_size: the size of the class structure
|
||
* @instance_size: the size of the instance structure
|
||
*
|
||
* A structure holding information for a specific type.
|
||
*
|
||
* See also: g_type_query()
|
||
*/
|
||
struct _GTypeQuery
|
||
{
|
||
GType type;
|
||
const gchar *type_name;
|
||
guint class_size;
|
||
guint instance_size;
|
||
};
|
||
|
||
|
||
/* Casts, checks and accessors for structured types
|
||
* usage of these macros is reserved to type implementations only
|
||
*/
|
||
/*< protected >*/
|
||
/**
|
||
* G_TYPE_CHECK_INSTANCE:
|
||
* @instance: Location of a #GTypeInstance structure
|
||
*
|
||
* Checks if @instance is a valid #GTypeInstance structure,
|
||
* otherwise issues a warning and returns %FALSE. %NULL is not a valid
|
||
* #GTypeInstance.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: %TRUE if @instance is valid
|
||
*/
|
||
#define G_TYPE_CHECK_INSTANCE(instance) (_G_TYPE_CHI ((GTypeInstance*) (instance)))
|
||
/**
|
||
* G_TYPE_CHECK_INSTANCE_CAST:
|
||
* @instance: (nullable): Location of a #GTypeInstance structure
|
||
* @g_type: The type to be returned
|
||
* @c_type: The corresponding C type of @g_type
|
||
*
|
||
* Checks that @instance is an instance of the type identified by @g_type
|
||
* and issues a warning if this is not the case. Returns @instance casted
|
||
* to a pointer to @c_type.
|
||
*
|
||
* No warning will be issued if @instance is %NULL, and %NULL will be returned.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*/
|
||
#define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type) (_G_TYPE_CIC ((instance), (g_type), c_type))
|
||
/**
|
||
* G_TYPE_CHECK_INSTANCE_TYPE:
|
||
* @instance: (nullable): Location of a #GTypeInstance structure.
|
||
* @g_type: The type to be checked
|
||
*
|
||
* Checks if @instance is an instance of the type identified by @g_type. If
|
||
* @instance is %NULL, %FALSE will be returned.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: %TRUE if @instance is an instance of @g_type
|
||
*/
|
||
#define G_TYPE_CHECK_INSTANCE_TYPE(instance, g_type) (_G_TYPE_CIT ((instance), (g_type)))
|
||
/**
|
||
* G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE:
|
||
* @instance: (nullable): Location of a #GTypeInstance structure.
|
||
* @g_type: The fundamental type to be checked
|
||
*
|
||
* Checks if @instance is an instance of the fundamental type identified by @g_type.
|
||
* If @instance is %NULL, %FALSE will be returned.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: %TRUE if @instance is an instance of @g_type
|
||
*/
|
||
#define G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE(instance, g_type) (_G_TYPE_CIFT ((instance), (g_type)))
|
||
/**
|
||
* G_TYPE_INSTANCE_GET_CLASS:
|
||
* @instance: Location of the #GTypeInstance structure
|
||
* @g_type: The #GType of the class to be returned
|
||
* @c_type: The C type of the class structure
|
||
*
|
||
* Get the class structure of a given @instance, casted
|
||
* to a specified ancestor type @g_type of the instance.
|
||
*
|
||
* Note that while calling a GInstanceInitFunc(), the class pointer
|
||
* gets modified, so it might not always return the expected pointer.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: a pointer to the class structure
|
||
*/
|
||
#define G_TYPE_INSTANCE_GET_CLASS(instance, g_type, c_type) (_G_TYPE_IGC ((instance), (g_type), c_type))
|
||
/**
|
||
* G_TYPE_INSTANCE_GET_INTERFACE:
|
||
* @instance: Location of the #GTypeInstance structure
|
||
* @g_type: The #GType of the interface to be returned
|
||
* @c_type: The C type of the interface structure
|
||
*
|
||
* Get the interface structure for interface @g_type of a given @instance.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: a pointer to the interface structure
|
||
*/
|
||
#define G_TYPE_INSTANCE_GET_INTERFACE(instance, g_type, c_type) (_G_TYPE_IGI ((instance), (g_type), c_type))
|
||
/**
|
||
* G_TYPE_CHECK_CLASS_CAST:
|
||
* @g_class: Location of a #GTypeClass structure
|
||
* @g_type: The type to be returned
|
||
* @c_type: The corresponding C type of class structure of @g_type
|
||
*
|
||
* Checks that @g_class is a class structure of the type identified by @g_type
|
||
* and issues a warning if this is not the case. Returns @g_class casted
|
||
* to a pointer to @c_type. %NULL is not a valid class structure.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*/
|
||
#define G_TYPE_CHECK_CLASS_CAST(g_class, g_type, c_type) (_G_TYPE_CCC ((g_class), (g_type), c_type))
|
||
/**
|
||
* G_TYPE_CHECK_CLASS_TYPE:
|
||
* @g_class: (nullable): Location of a #GTypeClass structure
|
||
* @g_type: The type to be checked
|
||
*
|
||
* Checks if @g_class is a class structure of the type identified by
|
||
* @g_type. If @g_class is %NULL, %FALSE will be returned.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: %TRUE if @g_class is a class structure of @g_type
|
||
*/
|
||
#define G_TYPE_CHECK_CLASS_TYPE(g_class, g_type) (_G_TYPE_CCT ((g_class), (g_type)))
|
||
/**
|
||
* G_TYPE_CHECK_VALUE:
|
||
* @value: a #GValue
|
||
*
|
||
* Checks if @value has been initialized to hold values
|
||
* of a value type.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: %TRUE if @value is initialized
|
||
*/
|
||
#define G_TYPE_CHECK_VALUE(value) (_G_TYPE_CHV ((value)))
|
||
/**
|
||
* G_TYPE_CHECK_VALUE_TYPE:
|
||
* @value: a #GValue
|
||
* @g_type: The type to be checked
|
||
*
|
||
* Checks if @value has been initialized to hold values
|
||
* of type @g_type.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: %TRUE if @value has been initialized to hold values of type @g_type
|
||
*/
|
||
#define G_TYPE_CHECK_VALUE_TYPE(value, g_type) (_G_TYPE_CVH ((value), (g_type)))
|
||
/**
|
||
* G_TYPE_FROM_INSTANCE:
|
||
* @instance: Location of a valid #GTypeInstance structure
|
||
*
|
||
* Get the type identifier from a given @instance structure.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: the #GType
|
||
*/
|
||
#define G_TYPE_FROM_INSTANCE(instance) (G_TYPE_FROM_CLASS (((GTypeInstance*) (instance))->g_class))
|
||
/**
|
||
* G_TYPE_FROM_CLASS:
|
||
* @g_class: Location of a valid #GTypeClass structure
|
||
*
|
||
* Get the type identifier from a given @class structure.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: the #GType
|
||
*/
|
||
#define G_TYPE_FROM_CLASS(g_class) (((GTypeClass*) (g_class))->g_type)
|
||
/**
|
||
* G_TYPE_FROM_INTERFACE:
|
||
* @g_iface: Location of a valid #GTypeInterface structure
|
||
*
|
||
* Get the type identifier from a given @interface structure.
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Returns: the #GType
|
||
*/
|
||
#define G_TYPE_FROM_INTERFACE(g_iface) (((GTypeInterface*) (g_iface))->g_type)
|
||
|
||
/**
|
||
* G_TYPE_INSTANCE_GET_PRIVATE:
|
||
* @instance: the instance of a type deriving from @private_type
|
||
* @g_type: the type identifying which private data to retrieve
|
||
* @c_type: The C type for the private structure
|
||
*
|
||
* Gets the private structure for a particular type.
|
||
*
|
||
* The private structure must have been registered in the
|
||
* class_init function with g_type_class_add_private().
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Since: 2.4
|
||
* Deprecated: 2.58: Use G_ADD_PRIVATE() and the generated
|
||
* `your_type_get_instance_private()` function instead
|
||
* Returns: (not nullable): a pointer to the private data structure
|
||
*/
|
||
#define G_TYPE_INSTANCE_GET_PRIVATE(instance, g_type, c_type) ((c_type*) g_type_instance_get_private ((GTypeInstance*) (instance), (g_type))) GOBJECT_DEPRECATED_MACRO_IN_2_58_FOR(G_ADD_PRIVATE)
|
||
|
||
/**
|
||
* G_TYPE_CLASS_GET_PRIVATE:
|
||
* @klass: the class of a type deriving from @private_type
|
||
* @g_type: the type identifying which private data to retrieve
|
||
* @c_type: The C type for the private structure
|
||
*
|
||
* Gets the private class structure for a particular type.
|
||
*
|
||
* The private structure must have been registered in the
|
||
* get_type() function with g_type_add_class_private().
|
||
*
|
||
* This macro should only be used in type implementations.
|
||
*
|
||
* Since: 2.24
|
||
* Returns: (not nullable): a pointer to the private data structure
|
||
*/
|
||
#define G_TYPE_CLASS_GET_PRIVATE(klass, g_type, c_type) ((c_type*) g_type_class_get_private ((GTypeClass*) (klass), (g_type)))
|
||
|
||
/**
|
||
* GTypeDebugFlags:
|
||
* @G_TYPE_DEBUG_NONE: Print no messages
|
||
* @G_TYPE_DEBUG_OBJECTS: Print messages about object bookkeeping
|
||
* @G_TYPE_DEBUG_SIGNALS: Print messages about signal emissions
|
||
* @G_TYPE_DEBUG_MASK: Mask covering all debug flags
|
||
* @G_TYPE_DEBUG_INSTANCE_COUNT: Keep a count of instances of each type
|
||
*
|
||
* These flags used to be passed to g_type_init_with_debug_flags() which
|
||
* is now deprecated.
|
||
*
|
||
* If you need to enable debugging features, use the `GOBJECT_DEBUG`
|
||
* environment variable.
|
||
*
|
||
* Deprecated: 2.36: g_type_init() is now done automatically
|
||
*/
|
||
typedef enum /*< skip >*/
|
||
{
|
||
G_TYPE_DEBUG_NONE = 0,
|
||
G_TYPE_DEBUG_OBJECTS = 1 << 0,
|
||
G_TYPE_DEBUG_SIGNALS = 1 << 1,
|
||
G_TYPE_DEBUG_INSTANCE_COUNT = 1 << 2,
|
||
G_TYPE_DEBUG_MASK = 0x07
|
||
} GTypeDebugFlags GOBJECT_DEPRECATED_TYPE_IN_2_36;
|
||
|
||
|
||
/* --- prototypes --- */
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
||
GOBJECT_DEPRECATED_IN_2_36
|
||
void g_type_init (void);
|
||
GOBJECT_DEPRECATED_IN_2_36
|
||
void g_type_init_with_debug_flags (GTypeDebugFlags debug_flags);
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
const gchar * g_type_name (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GQuark g_type_qname (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_from_name (const gchar *name);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_parent (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
guint g_type_depth (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_next_base (GType leaf_type,
|
||
GType root_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_is_a (GType type,
|
||
GType is_a_type);
|
||
|
||
/* Hoist exact GType comparisons into the caller */
|
||
#define g_type_is_a(a,b) ((a) == (b) || (g_type_is_a) ((a), (b)))
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_class_ref (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_class_peek (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_class_peek_static (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_class_unref (gpointer g_class);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_class_peek_parent (gpointer g_class);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_interface_peek (gpointer instance_class,
|
||
GType iface_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_interface_peek_parent (gpointer g_iface);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_default_interface_ref (GType g_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_default_interface_peek (GType g_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_default_interface_unref (gpointer g_iface);
|
||
|
||
/* g_free() the returned arrays */
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType* g_type_children (GType type,
|
||
guint *n_children);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType* g_type_interfaces (GType type,
|
||
guint *n_interfaces);
|
||
|
||
/* per-type _static_ data */
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_set_qdata (GType type,
|
||
GQuark quark,
|
||
gpointer data);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_get_qdata (GType type,
|
||
GQuark quark);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_query (GType type,
|
||
GTypeQuery *query);
|
||
|
||
GOBJECT_AVAILABLE_IN_2_44
|
||
int g_type_get_instance_count (GType type);
|
||
|
||
/* --- type registration --- */
|
||
/**
|
||
* GBaseInitFunc:
|
||
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to initialize
|
||
*
|
||
* A callback function used by the type system to do base initialization
|
||
* of the class structures of derived types.
|
||
*
|
||
* This function is called as part of the initialization process of all derived
|
||
* classes and should reallocate or reset all dynamic class members copied over
|
||
* from the parent class.
|
||
*
|
||
* For example, class members (such as strings) that are not sufficiently
|
||
* handled by a plain memory copy of the parent class into the derived class
|
||
* have to be altered. See GClassInitFunc() for a discussion of the class
|
||
* initialization process.
|
||
*/
|
||
typedef void (*GBaseInitFunc) (gpointer g_class);
|
||
/**
|
||
* GBaseFinalizeFunc:
|
||
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to finalize
|
||
*
|
||
* A callback function used by the type system to finalize those portions
|
||
* of a derived types class structure that were setup from the corresponding
|
||
* GBaseInitFunc() function.
|
||
*
|
||
* Class finalization basically works the inverse way in which class
|
||
* initialization is performed.
|
||
*
|
||
* See GClassInitFunc() for a discussion of the class initialization process.
|
||
*/
|
||
typedef void (*GBaseFinalizeFunc) (gpointer g_class);
|
||
/**
|
||
* GClassInitFunc:
|
||
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to initialize.
|
||
* @class_data: The @class_data member supplied via the #GTypeInfo structure.
|
||
*
|
||
* A callback function used by the type system to initialize the class
|
||
* of a specific type.
|
||
*
|
||
* This function should initialize all static class members.
|
||
*
|
||
* The initialization process of a class involves:
|
||
*
|
||
* - Copying common members from the parent class over to the
|
||
* derived class structure.
|
||
* - Zero initialization of the remaining members not copied
|
||
* over from the parent class.
|
||
* - Invocation of the GBaseInitFunc() initializers of all parent
|
||
* types and the class' type.
|
||
* - Invocation of the class' GClassInitFunc() initializer.
|
||
*
|
||
* Since derived classes are partially initialized through a memory copy
|
||
* of the parent class, the general rule is that GBaseInitFunc() and
|
||
* GBaseFinalizeFunc() should take care of necessary reinitialization
|
||
* and release of those class members that were introduced by the type
|
||
* that specified these GBaseInitFunc()/GBaseFinalizeFunc().
|
||
* GClassInitFunc() should only care about initializing static
|
||
* class members, while dynamic class members (such as allocated strings
|
||
* or reference counted resources) are better handled by a GBaseInitFunc()
|
||
* for this type, so proper initialization of the dynamic class members
|
||
* is performed for class initialization of derived types as well.
|
||
*
|
||
* An example may help to correspond the intend of the different class
|
||
* initializers:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* typedef struct {
|
||
* GObjectClass parent_class;
|
||
* gint static_integer;
|
||
* gchar *dynamic_string;
|
||
* } TypeAClass;
|
||
* static void
|
||
* type_a_base_class_init (TypeAClass *class)
|
||
* {
|
||
* class->dynamic_string = g_strdup ("some string");
|
||
* }
|
||
* static void
|
||
* type_a_base_class_finalize (TypeAClass *class)
|
||
* {
|
||
* g_free (class->dynamic_string);
|
||
* }
|
||
* static void
|
||
* type_a_class_init (TypeAClass *class)
|
||
* {
|
||
* class->static_integer = 42;
|
||
* }
|
||
*
|
||
* typedef struct {
|
||
* TypeAClass parent_class;
|
||
* gfloat static_float;
|
||
* GString *dynamic_gstring;
|
||
* } TypeBClass;
|
||
* static void
|
||
* type_b_base_class_init (TypeBClass *class)
|
||
* {
|
||
* class->dynamic_gstring = g_string_new ("some other string");
|
||
* }
|
||
* static void
|
||
* type_b_base_class_finalize (TypeBClass *class)
|
||
* {
|
||
* g_string_free (class->dynamic_gstring);
|
||
* }
|
||
* static void
|
||
* type_b_class_init (TypeBClass *class)
|
||
* {
|
||
* class->static_float = 3.14159265358979323846;
|
||
* }
|
||
* ]|
|
||
*
|
||
* Initialization of TypeBClass will first cause initialization of
|
||
* TypeAClass (derived classes reference their parent classes, see
|
||
* g_type_class_ref() on this).
|
||
*
|
||
* Initialization of TypeAClass roughly involves zero-initializing its fields,
|
||
* then calling its GBaseInitFunc() type_a_base_class_init() to allocate
|
||
* its dynamic members (dynamic_string), and finally calling its GClassInitFunc()
|
||
* type_a_class_init() to initialize its static members (static_integer).
|
||
* The first step in the initialization process of TypeBClass is then
|
||
* a plain memory copy of the contents of TypeAClass into TypeBClass and
|
||
* zero-initialization of the remaining fields in TypeBClass.
|
||
* The dynamic members of TypeAClass within TypeBClass now need
|
||
* reinitialization which is performed by calling type_a_base_class_init()
|
||
* with an argument of TypeBClass.
|
||
*
|
||
* After that, the GBaseInitFunc() of TypeBClass, type_b_base_class_init()
|
||
* is called to allocate the dynamic members of TypeBClass (dynamic_gstring),
|
||
* and finally the GClassInitFunc() of TypeBClass, type_b_class_init(),
|
||
* is called to complete the initialization process with the static members
|
||
* (static_float).
|
||
*
|
||
* Corresponding finalization counter parts to the GBaseInitFunc() functions
|
||
* have to be provided to release allocated resources at class finalization
|
||
* time.
|
||
*/
|
||
typedef void (*GClassInitFunc) (gpointer g_class,
|
||
gpointer class_data);
|
||
/**
|
||
* GClassFinalizeFunc:
|
||
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to finalize
|
||
* @class_data: The @class_data member supplied via the #GTypeInfo structure
|
||
*
|
||
* A callback function used by the type system to finalize a class.
|
||
*
|
||
* This function is rarely needed, as dynamically allocated class resources
|
||
* should be handled by GBaseInitFunc() and GBaseFinalizeFunc().
|
||
*
|
||
* Also, specification of a GClassFinalizeFunc() in the #GTypeInfo
|
||
* structure of a static type is invalid, because classes of static types
|
||
* will never be finalized (they are artificially kept alive when their
|
||
* reference count drops to zero).
|
||
*/
|
||
typedef void (*GClassFinalizeFunc) (gpointer g_class,
|
||
gpointer class_data);
|
||
/**
|
||
* GInstanceInitFunc:
|
||
* @instance: The instance to initialize
|
||
* @g_class: (type GObject.TypeClass): The class of the type the instance is
|
||
* created for
|
||
*
|
||
* A callback function used by the type system to initialize a new
|
||
* instance of a type.
|
||
*
|
||
* This function initializes all instance members and allocates any resources
|
||
* required by it.
|
||
*
|
||
* Initialization of a derived instance involves calling all its parent
|
||
* types instance initializers, so the class member of the instance
|
||
* is altered during its initialization to always point to the class that
|
||
* belongs to the type the current initializer was introduced for.
|
||
*
|
||
* The extended members of @instance are guaranteed to have been filled with
|
||
* zeros before this function is called.
|
||
*/
|
||
typedef void (*GInstanceInitFunc) (GTypeInstance *instance,
|
||
gpointer g_class);
|
||
/**
|
||
* GInterfaceInitFunc:
|
||
* @g_iface: (type GObject.TypeInterface): The interface structure to initialize
|
||
* @iface_data: The @interface_data supplied via the #GInterfaceInfo structure
|
||
*
|
||
* A callback function used by the type system to initialize a new
|
||
* interface.
|
||
*
|
||
* This function should initialize all internal data and* allocate any
|
||
* resources required by the interface.
|
||
*
|
||
* The members of @iface_data are guaranteed to have been filled with
|
||
* zeros before this function is called.
|
||
*/
|
||
typedef void (*GInterfaceInitFunc) (gpointer g_iface,
|
||
gpointer iface_data);
|
||
/**
|
||
* GInterfaceFinalizeFunc:
|
||
* @g_iface: (type GObject.TypeInterface): The interface structure to finalize
|
||
* @iface_data: The @interface_data supplied via the #GInterfaceInfo structure
|
||
*
|
||
* A callback function used by the type system to finalize an interface.
|
||
*
|
||
* This function should destroy any internal data and release any resources
|
||
* allocated by the corresponding GInterfaceInitFunc() function.
|
||
*/
|
||
typedef void (*GInterfaceFinalizeFunc) (gpointer g_iface,
|
||
gpointer iface_data);
|
||
/**
|
||
* GTypeClassCacheFunc:
|
||
* @cache_data: data that was given to the g_type_add_class_cache_func() call
|
||
* @g_class: (type GObject.TypeClass): The #GTypeClass structure which is
|
||
* unreferenced
|
||
*
|
||
* A callback function which is called when the reference count of a class
|
||
* drops to zero.
|
||
*
|
||
* It may use g_type_class_ref() to prevent the class from being freed. You
|
||
* should not call g_type_class_unref() from a #GTypeClassCacheFunc function
|
||
* to prevent infinite recursion, use g_type_class_unref_uncached() instead.
|
||
*
|
||
* The functions have to check the class id passed in to figure
|
||
* whether they actually want to cache the class of this type, since all
|
||
* classes are routed through the same #GTypeClassCacheFunc chain.
|
||
*
|
||
* Returns: %TRUE to stop further #GTypeClassCacheFuncs from being
|
||
* called, %FALSE to continue
|
||
*/
|
||
typedef gboolean (*GTypeClassCacheFunc) (gpointer cache_data,
|
||
GTypeClass *g_class);
|
||
/**
|
||
* GTypeInterfaceCheckFunc:
|
||
* @check_data: data passed to g_type_add_interface_check()
|
||
* @g_iface: (type GObject.TypeInterface): the interface that has been
|
||
* initialized
|
||
*
|
||
* A callback called after an interface vtable is initialized.
|
||
*
|
||
* See g_type_add_interface_check().
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
typedef void (*GTypeInterfaceCheckFunc) (gpointer check_data,
|
||
gpointer g_iface);
|
||
/**
|
||
* GTypeFundamentalFlags:
|
||
* @G_TYPE_FLAG_CLASSED: Indicates a classed type
|
||
* @G_TYPE_FLAG_INSTANTIATABLE: Indicates an instantiatable type (implies classed)
|
||
* @G_TYPE_FLAG_DERIVABLE: Indicates a flat derivable type
|
||
* @G_TYPE_FLAG_DEEP_DERIVABLE: Indicates a deep derivable type (implies derivable)
|
||
*
|
||
* Bit masks used to check or determine specific characteristics of a
|
||
* fundamental type.
|
||
*/
|
||
typedef enum /*< skip >*/
|
||
{
|
||
/* There is no G_TYPE_FUNDAMENTAL_FLAGS_NONE: this is implemented to use
|
||
* the same bits as GTypeFlags */
|
||
G_TYPE_FLAG_CLASSED = (1 << 0),
|
||
G_TYPE_FLAG_INSTANTIATABLE = (1 << 1),
|
||
G_TYPE_FLAG_DERIVABLE = (1 << 2),
|
||
G_TYPE_FLAG_DEEP_DERIVABLE = (1 << 3)
|
||
} GTypeFundamentalFlags;
|
||
/**
|
||
* GTypeFlags:
|
||
* @G_TYPE_FLAG_NONE: No special flags. Since: 2.74
|
||
* @G_TYPE_FLAG_ABSTRACT: Indicates an abstract type. No instances can be
|
||
* created for an abstract type
|
||
* @G_TYPE_FLAG_VALUE_ABSTRACT: Indicates an abstract value type, i.e. a type
|
||
* that introduces a value table, but can't be used for
|
||
* g_value_init()
|
||
* @G_TYPE_FLAG_FINAL: Indicates a final type. A final type is a non-derivable
|
||
* leaf node in a deep derivable type hierarchy tree. Since: 2.70
|
||
* @G_TYPE_FLAG_DEPRECATED: The type is deprecated and may be removed in a
|
||
* future version. A warning will be emitted if it is instantiated while
|
||
* running with `G_ENABLE_DIAGNOSTIC=1`. Since 2.76
|
||
*
|
||
* Bit masks used to check or determine characteristics of a type.
|
||
*/
|
||
typedef enum /*< skip >*/
|
||
{
|
||
G_TYPE_FLAG_NONE GOBJECT_AVAILABLE_ENUMERATOR_IN_2_74 = 0,
|
||
G_TYPE_FLAG_ABSTRACT = (1 << 4),
|
||
G_TYPE_FLAG_VALUE_ABSTRACT = (1 << 5),
|
||
G_TYPE_FLAG_FINAL GOBJECT_AVAILABLE_ENUMERATOR_IN_2_70 = (1 << 6),
|
||
G_TYPE_FLAG_DEPRECATED GOBJECT_AVAILABLE_ENUMERATOR_IN_2_76 = (1 << 7)
|
||
} GTypeFlags;
|
||
/**
|
||
* GTypeInfo:
|
||
* @class_size: Size of the class structure (required for interface, classed and instantiatable types)
|
||
* @base_init: Location of the base initialization function (optional)
|
||
* @base_finalize: Location of the base finalization function (optional)
|
||
* @class_init: Location of the class initialization function for
|
||
* classed and instantiatable types. Location of the default vtable
|
||
* inititalization function for interface types. (optional) This function
|
||
* is used both to fill in virtual functions in the class or default vtable,
|
||
* and to do type-specific setup such as registering signals and object
|
||
* properties.
|
||
* @class_finalize: Location of the class finalization function for
|
||
* classed and instantiatable types. Location of the default vtable
|
||
* finalization function for interface types. (optional)
|
||
* @class_data: User-supplied data passed to the class init/finalize functions
|
||
* @instance_size: Size of the instance (object) structure (required for instantiatable types only)
|
||
* @n_preallocs: Prior to GLib 2.10, it specified the number of pre-allocated (cached) instances to reserve memory for (0 indicates no caching). Since GLib 2.10 this field is ignored.
|
||
* @instance_init: Location of the instance initialization function (optional, for instantiatable types only)
|
||
* @value_table: A #GTypeValueTable function table for generic handling of GValues
|
||
* of this type (usually only useful for fundamental types)
|
||
*
|
||
* This structure is used to provide the type system with the information
|
||
* required to initialize and destruct (finalize) a type's class and
|
||
* its instances.
|
||
*
|
||
* The initialized structure is passed to the g_type_register_static() function
|
||
* (or is copied into the provided #GTypeInfo structure in the
|
||
* g_type_plugin_complete_type_info()). The type system will perform a deep
|
||
* copy of this structure, so its memory does not need to be persistent
|
||
* across invocation of g_type_register_static().
|
||
*/
|
||
struct _GTypeInfo
|
||
{
|
||
/* interface types, classed types, instantiated types */
|
||
guint16 class_size;
|
||
|
||
GBaseInitFunc base_init;
|
||
GBaseFinalizeFunc base_finalize;
|
||
|
||
/* interface types, classed types, instantiated types */
|
||
GClassInitFunc class_init;
|
||
GClassFinalizeFunc class_finalize;
|
||
gconstpointer class_data;
|
||
|
||
/* instantiated types */
|
||
guint16 instance_size;
|
||
guint16 n_preallocs;
|
||
GInstanceInitFunc instance_init;
|
||
|
||
/* value handling */
|
||
const GTypeValueTable *value_table;
|
||
};
|
||
/**
|
||
* GTypeFundamentalInfo:
|
||
* @type_flags: #GTypeFundamentalFlags describing the characteristics of the fundamental type
|
||
*
|
||
* A structure that provides information to the type system which is
|
||
* used specifically for managing fundamental types.
|
||
*/
|
||
struct _GTypeFundamentalInfo
|
||
{
|
||
GTypeFundamentalFlags type_flags;
|
||
};
|
||
/**
|
||
* GInterfaceInfo:
|
||
* @interface_init: location of the interface initialization function
|
||
* @interface_finalize: location of the interface finalization function
|
||
* @interface_data: user-supplied data passed to the interface init/finalize functions
|
||
*
|
||
* A structure that provides information to the type system which is
|
||
* used specifically for managing interface types.
|
||
*/
|
||
struct _GInterfaceInfo
|
||
{
|
||
GInterfaceInitFunc interface_init;
|
||
GInterfaceFinalizeFunc interface_finalize;
|
||
gpointer interface_data;
|
||
};
|
||
|
||
/**
|
||
* GTypeValueInitFunc:
|
||
* @value: the value to initialize
|
||
*
|
||
* Initializes the value contents by setting the fields of the `value->data`
|
||
* array.
|
||
*
|
||
* The data array of the #GValue passed into this function was zero-filled
|
||
* with `memset()`, so no care has to be taken to free any old contents.
|
||
* For example, in the case of a string value that may never be %NULL, the
|
||
* implementation might look like:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* value->data[0].v_pointer = g_strdup ("");
|
||
* ]|
|
||
*
|
||
* Since: 2.78
|
||
*/
|
||
GOBJECT_AVAILABLE_TYPE_IN_2_78
|
||
typedef void (* GTypeValueInitFunc) (GValue *value);
|
||
|
||
/**
|
||
* GTypeValueFreeFunc:
|
||
* @value: the value to free
|
||
*
|
||
* Frees any old contents that might be left in the `value->data` array of
|
||
* the given value.
|
||
*
|
||
* No resources may remain allocated through the #GValue contents after this
|
||
* function returns. E.g. for our above string type:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* // only free strings without a specific flag for static storage
|
||
* if (!(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
|
||
* g_free (value->data[0].v_pointer);
|
||
* ]|
|
||
*
|
||
* Since: 2.78
|
||
*/
|
||
GOBJECT_AVAILABLE_TYPE_IN_2_78
|
||
typedef void (* GTypeValueFreeFunc) (GValue *value);
|
||
|
||
/**
|
||
* GTypeValueCopyFunc:
|
||
* @src_value: the value to copy
|
||
* @dest_value: (out): the location of the copy
|
||
*
|
||
* Copies the content of a #GValue into another.
|
||
*
|
||
* The @dest_value is a #GValue with zero-filled data section and @src_value
|
||
* is a properly initialized #GValue of same type, or derived type.
|
||
*
|
||
* The purpose of this function is to copy the contents of @src_value
|
||
* into @dest_value in a way, that even after @src_value has been freed, the
|
||
* contents of @dest_value remain valid. String type example:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* dest_value->data[0].v_pointer = g_strdup (src_value->data[0].v_pointer);
|
||
* ]|
|
||
*
|
||
* Since: 2.78
|
||
*/
|
||
GOBJECT_AVAILABLE_TYPE_IN_2_78
|
||
typedef void (* GTypeValueCopyFunc) (const GValue *src_value,
|
||
GValue *dest_value);
|
||
|
||
/**
|
||
* GTypeValuePeekPointerFunc:
|
||
* @value: the value to peek
|
||
*
|
||
* If the value contents fit into a pointer, such as objects or strings,
|
||
* return this pointer, so the caller can peek at the current contents.
|
||
*
|
||
* To extend on our above string example:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* return value->data[0].v_pointer;
|
||
* ]|
|
||
*
|
||
* Returns: (transfer none): a pointer to the value contents
|
||
*
|
||
* Since: 2.78
|
||
*/
|
||
GOBJECT_AVAILABLE_TYPE_IN_2_78
|
||
typedef gpointer (* GTypeValuePeekPointerFunc) (const GValue *value);
|
||
|
||
/**
|
||
* GTypeValueCollectFunc:
|
||
* @value: the value to initialize
|
||
* @n_collect_values: the number of collected values
|
||
* @collect_values: (array length=n_collect_values): the collected values
|
||
* @collect_flags: optional flags
|
||
*
|
||
* This function is responsible for converting the values collected from
|
||
* a variadic argument list into contents suitable for storage in a #GValue.
|
||
*
|
||
* This function should setup @value similar to #GTypeValueInitFunc; e.g.
|
||
* for a string value that does not allow `NULL` pointers, it needs to either
|
||
* emit an error, or do an implicit conversion by storing an empty string.
|
||
*
|
||
* The @value passed in to this function has a zero-filled data array, so
|
||
* just like for #GTypeValueInitFunc it is guaranteed to not contain any old
|
||
* contents that might need freeing.
|
||
*
|
||
* The @n_collect_values argument is the string length of the `collect_format`
|
||
* field of #GTypeValueTable, and `collect_values` is an array of #GTypeCValue
|
||
* with length of @n_collect_values, containing the collected values according
|
||
* to `collect_format`.
|
||
*
|
||
* The @collect_flags argument provided as a hint by the caller. It may
|
||
* contain the flag %G_VALUE_NOCOPY_CONTENTS indicating that the collected
|
||
* value contents may be considered ‘static’ for the duration of the @value
|
||
* lifetime. Thus an extra copy of the contents stored in @collect_values is
|
||
* not required for assignment to @value.
|
||
*
|
||
* For our above string example, we continue with:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* if (!collect_values[0].v_pointer)
|
||
* value->data[0].v_pointer = g_strdup ("");
|
||
* else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
|
||
* {
|
||
* value->data[0].v_pointer = collect_values[0].v_pointer;
|
||
* // keep a flag for the value_free() implementation to not free this string
|
||
* value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;
|
||
* }
|
||
* else
|
||
* value->data[0].v_pointer = g_strdup (collect_values[0].v_pointer);
|
||
* return NULL;
|
||
* ]|
|
||
*
|
||
* It should be noted, that it is generally a bad idea to follow the
|
||
* %G_VALUE_NOCOPY_CONTENTS hint for reference counted types. Due to
|
||
* reentrancy requirements and reference count assertions performed
|
||
* by the signal emission code, reference counts should always be
|
||
* incremented for reference counted contents stored in the `value->data`
|
||
* array. To deviate from our string example for a moment, and taking
|
||
* a look at an exemplary implementation for `GTypeValueTable.collect_value()`
|
||
* of `GObject`:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* GObject *object = G_OBJECT (collect_values[0].v_pointer);
|
||
* g_return_val_if_fail (object != NULL,
|
||
* g_strdup_printf ("Object %p passed as invalid NULL pointer", object));
|
||
* // never honour G_VALUE_NOCOPY_CONTENTS for ref-counted types
|
||
* value->data[0].v_pointer = g_object_ref (object);
|
||
* return NULL;
|
||
* ]|
|
||
*
|
||
* The reference count for valid objects is always incremented, regardless
|
||
* of `collect_flags`. For invalid objects, the example returns a newly
|
||
* allocated string without altering `value`.
|
||
*
|
||
* Upon success, `collect_value()` needs to return `NULL`. If, however,
|
||
* an error condition occurred, `collect_value()` should return a newly
|
||
* allocated string containing an error diagnostic.
|
||
*
|
||
* The calling code makes no assumptions about the `value` contents being
|
||
* valid upon error returns, `value` is simply thrown away without further
|
||
* freeing. As such, it is a good idea to not allocate `GValue` contents
|
||
* prior to returning an error; however, `collect_values()` is not obliged
|
||
* to return a correctly setup @value for error returns, simply because
|
||
* any non-`NULL` return is considered a fatal programming error, and
|
||
* further program behaviour is undefined.
|
||
*
|
||
* Returns: (transfer full) (nullable): `NULL` on success, otherwise a
|
||
* newly allocated error string on failure
|
||
*
|
||
* Since: 2.78
|
||
*/
|
||
GOBJECT_AVAILABLE_TYPE_IN_2_78
|
||
typedef gchar * (* GTypeValueCollectFunc) (GValue *value,
|
||
guint n_collect_values,
|
||
GTypeCValue *collect_values,
|
||
guint collect_flags);
|
||
|
||
/**
|
||
* GTypeValueLCopyFunc:
|
||
* @value: the value to lcopy
|
||
* @n_collect_values: the number of collected values
|
||
* @collect_values: (array length=n_collect_values): the collected
|
||
* locations for storage
|
||
* @collect_flags: optional flags
|
||
*
|
||
* This function is responsible for storing the `value`
|
||
* contents into arguments passed through a variadic argument list which
|
||
* got collected into `collect_values` according to `lcopy_format`.
|
||
*
|
||
* The `n_collect_values` argument equals the string length of
|
||
* `lcopy_format`, and `collect_flags` may contain %G_VALUE_NOCOPY_CONTENTS.
|
||
*
|
||
* In contrast to #GTypeValueCollectFunc, this function is obliged to always
|
||
* properly support %G_VALUE_NOCOPY_CONTENTS.
|
||
*
|
||
* Similar to #GTypeValueCollectFunc the function may prematurely abort by
|
||
* returning a newly allocated string describing an error condition. To
|
||
* complete the string example:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* gchar **string_p = collect_values[0].v_pointer;
|
||
* g_return_val_if_fail (string_p != NULL,
|
||
* g_strdup ("string location passed as NULL"));
|
||
*
|
||
* if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
|
||
* *string_p = value->data[0].v_pointer;
|
||
* else
|
||
* *string_p = g_strdup (value->data[0].v_pointer);
|
||
* ]|
|
||
*
|
||
* And an illustrative version of this function for reference-counted
|
||
* types:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* GObject **object_p = collect_values[0].v_pointer;
|
||
* g_return_val_if_fail (object_p != NULL,
|
||
* g_strdup ("object location passed as NULL"));
|
||
*
|
||
* if (value->data[0].v_pointer == NULL)
|
||
* *object_p = NULL;
|
||
* else if (collect_flags & G_VALUE_NOCOPY_CONTENTS) // always honour
|
||
* *object_p = value->data[0].v_pointer;
|
||
* else
|
||
* *object_p = g_object_ref (value->data[0].v_pointer);
|
||
*
|
||
* return NULL;
|
||
* ]|
|
||
*
|
||
* Returns: (transfer full) (nullable): `NULL` on success, otherwise
|
||
* a newly allocated error string on failure
|
||
*
|
||
* Since: 2.78
|
||
*/
|
||
GOBJECT_AVAILABLE_TYPE_IN_2_78
|
||
typedef gchar * (* GTypeValueLCopyFunc) (const GValue *value,
|
||
guint n_collect_values,
|
||
GTypeCValue *collect_values,
|
||
guint collect_flags);
|
||
|
||
/**
|
||
* GTypeValueTable:
|
||
* @value_init: Function to initialize a GValue
|
||
* @value_free: Function to free a GValue
|
||
* @value_copy: Function to copy a GValue
|
||
* @value_peek_pointer: Function to peek the contents of a GValue if they fit
|
||
* into a pointer
|
||
* @collect_format: A string format describing how to collect the contents of
|
||
* this value bit-by-bit. Each character in the format represents
|
||
* an argument to be collected, and the characters themselves indicate
|
||
* the type of the argument. Currently supported arguments are:
|
||
* - `'i'`: Integers, passed as `collect_values[].v_int`
|
||
* - `'l'`: Longs, passed as `collect_values[].v_long`
|
||
* - `'d'`: Doubles, passed as `collect_values[].v_double`
|
||
* - `'p'`: Pointers, passed as `collect_values[].v_pointer`
|
||
* It should be noted that for variable argument list construction,
|
||
* ANSI C promotes every type smaller than an integer to an int, and
|
||
* floats to doubles. So for collection of short int or char, `'i'`
|
||
* needs to be used, and for collection of floats `'d'`.
|
||
* @collect_value: Function to initialize a GValue from the values
|
||
* collected from variadic arguments
|
||
* @lcopy_format: Format description of the arguments to collect for @lcopy_value,
|
||
* analogous to @collect_format. Usually, @lcopy_format string consists
|
||
* only of `'p'`s to provide lcopy_value() with pointers to storage locations.
|
||
* @lcopy_value: Function to store the contents of a value into the
|
||
* locations collected from variadic arguments
|
||
*
|
||
* The #GTypeValueTable provides the functions required by the #GValue
|
||
* implementation, to serve as a container for values of a type.
|
||
*/
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
||
struct _GTypeValueTable
|
||
{
|
||
GTypeValueInitFunc value_init;
|
||
GTypeValueFreeFunc value_free;
|
||
GTypeValueCopyFunc value_copy;
|
||
GTypeValuePeekPointerFunc value_peek_pointer;
|
||
|
||
const gchar *collect_format;
|
||
GTypeValueCollectFunc collect_value;
|
||
|
||
const gchar *lcopy_format;
|
||
GTypeValueLCopyFunc lcopy_value;
|
||
};
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_register_static (GType parent_type,
|
||
const gchar *type_name,
|
||
const GTypeInfo *info,
|
||
GTypeFlags flags);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_register_static_simple (GType parent_type,
|
||
const gchar *type_name,
|
||
guint class_size,
|
||
GClassInitFunc class_init,
|
||
guint instance_size,
|
||
GInstanceInitFunc instance_init,
|
||
GTypeFlags flags);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_register_dynamic (GType parent_type,
|
||
const gchar *type_name,
|
||
GTypePlugin *plugin,
|
||
GTypeFlags flags);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_register_fundamental (GType type_id,
|
||
const gchar *type_name,
|
||
const GTypeInfo *info,
|
||
const GTypeFundamentalInfo *finfo,
|
||
GTypeFlags flags);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_add_interface_static (GType instance_type,
|
||
GType interface_type,
|
||
const GInterfaceInfo *info);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_add_interface_dynamic (GType instance_type,
|
||
GType interface_type,
|
||
GTypePlugin *plugin);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_interface_add_prerequisite (GType interface_type,
|
||
GType prerequisite_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType*g_type_interface_prerequisites (GType interface_type,
|
||
guint *n_prerequisites);
|
||
GOBJECT_AVAILABLE_IN_2_68
|
||
GType g_type_interface_instantiatable_prerequisite
|
||
(GType interface_type);
|
||
GOBJECT_DEPRECATED_IN_2_58
|
||
void g_type_class_add_private (gpointer g_class,
|
||
gsize private_size);
|
||
GOBJECT_AVAILABLE_IN_2_38
|
||
gint g_type_add_instance_private (GType class_type,
|
||
gsize private_size);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_instance_get_private (GTypeInstance *instance,
|
||
GType private_type);
|
||
GOBJECT_AVAILABLE_IN_2_38
|
||
void g_type_class_adjust_private_offset (gpointer g_class,
|
||
gint *private_size_or_offset);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_add_class_private (GType class_type,
|
||
gsize private_size);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gpointer g_type_class_get_private (GTypeClass *klass,
|
||
GType private_type);
|
||
GOBJECT_AVAILABLE_IN_2_38
|
||
gint g_type_class_get_instance_private_offset (gpointer g_class);
|
||
|
||
GOBJECT_AVAILABLE_IN_2_34
|
||
void g_type_ensure (GType type);
|
||
GOBJECT_AVAILABLE_IN_2_36
|
||
guint g_type_get_type_registration_serial (void);
|
||
|
||
|
||
/* --- GType boilerplate --- */
|
||
/**
|
||
* G_DECLARE_FINAL_TYPE:
|
||
* @ModuleObjName: The name of the new type, in camel case (like `GtkWidget`)
|
||
* @module_obj_name: The name of the new type in lowercase, with words
|
||
* separated by `_` (like `gtk_widget`)
|
||
* @MODULE: The name of the module, in all caps (like `GTK`)
|
||
* @OBJ_NAME: The bare name of the type, in all caps (like `WIDGET`)
|
||
* @ParentName: the name of the parent type, in camel case (like `GtkWidget`)
|
||
*
|
||
* A convenience macro for emitting the usual declarations in the header file
|
||
* for a type which is not (at the present time) intended to be subclassed.
|
||
*
|
||
* You might use it in a header as follows:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* #ifndef _myapp_window_h_
|
||
* #define _myapp_window_h_
|
||
*
|
||
* #include <gtk/gtk.h>
|
||
*
|
||
* #define MY_APP_TYPE_WINDOW my_app_window_get_type ()
|
||
* G_DECLARE_FINAL_TYPE (MyAppWindow, my_app_window, MY_APP, WINDOW, GtkWindow)
|
||
*
|
||
* MyAppWindow * my_app_window_new (void);
|
||
*
|
||
* ...
|
||
*
|
||
* #endif
|
||
* ]|
|
||
*
|
||
* And use it as follow in your C file:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* struct _MyAppWindow
|
||
* {
|
||
* GtkWindow parent;
|
||
* ...
|
||
* };
|
||
* G_DEFINE_TYPE (MyAppWindow, my_app_window, GTK_TYPE_WINDOW)
|
||
* ]|
|
||
*
|
||
* This results in the following things happening:
|
||
*
|
||
* - the usual `my_app_window_get_type()` function is declared with a return type of #GType
|
||
*
|
||
* - the `MyAppWindow` type is defined as a `typedef` of `struct _MyAppWindow`. The struct itself is not
|
||
* defined and should be defined from the .c file before G_DEFINE_TYPE() is used.
|
||
*
|
||
* - the `MY_APP_WINDOW()` cast is emitted as `static inline` function along with the `MY_APP_IS_WINDOW()` type
|
||
* checking function
|
||
*
|
||
* - the `MyAppWindowClass` type is defined as a struct containing `GtkWindowClass`. This is done for the
|
||
* convenience of the person defining the type and should not be considered to be part of the ABI. In
|
||
* particular, without a firm declaration of the instance structure, it is not possible to subclass the type
|
||
* and therefore the fact that the size of the class structure is exposed is not a concern and it can be
|
||
* freely changed at any point in the future.
|
||
*
|
||
* - g_autoptr() support being added for your type, based on the type of your parent class
|
||
*
|
||
* You can only use this function if your parent type also supports g_autoptr().
|
||
*
|
||
* Because the type macro (`MY_APP_TYPE_WINDOW` in the above example) is not a callable, you must continue to
|
||
* manually define this as a macro for yourself.
|
||
*
|
||
* The declaration of the `_get_type()` function is the first thing emitted by the macro. This allows this macro
|
||
* to be used in the usual way with export control and API versioning macros.
|
||
*
|
||
* If you want to declare your own class structure, use G_DECLARE_DERIVABLE_TYPE().
|
||
*
|
||
* If you are writing a library, it is important to note that it is possible to convert a type from using
|
||
* G_DECLARE_FINAL_TYPE() to G_DECLARE_DERIVABLE_TYPE() without breaking API or ABI. As a precaution, you
|
||
* should therefore use G_DECLARE_FINAL_TYPE() until you are sure that it makes sense for your class to be
|
||
* subclassed. Once a class structure has been exposed it is not possible to change its size or remove or
|
||
* reorder items without breaking the API and/or ABI.
|
||
*
|
||
* Since: 2.44
|
||
**/
|
||
#define G_DECLARE_FINAL_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName) \
|
||
GType module_obj_name##_get_type (void); \
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
|
||
typedef struct _##ModuleObjName ModuleObjName; \
|
||
typedef struct { ParentName##Class parent_class; } ModuleObjName##Class; \
|
||
\
|
||
_GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, ParentName) \
|
||
G_DEFINE_AUTOPTR_CLEANUP_FUNC (ModuleObjName##Class, g_type_class_unref) \
|
||
\
|
||
G_GNUC_UNUSED static inline ModuleObjName * MODULE##_##OBJ_NAME (gpointer ptr) { \
|
||
return G_TYPE_CHECK_INSTANCE_CAST (ptr, module_obj_name##_get_type (), ModuleObjName); } \
|
||
G_GNUC_UNUSED static inline gboolean MODULE##_IS_##OBJ_NAME (gpointer ptr) { \
|
||
return G_TYPE_CHECK_INSTANCE_TYPE (ptr, module_obj_name##_get_type ()); } \
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
/**
|
||
* G_DECLARE_DERIVABLE_TYPE:
|
||
* @ModuleObjName: The name of the new type, in camel case (like `GtkWidget`)
|
||
* @module_obj_name: The name of the new type in lowercase, with words
|
||
* separated by `_` (like `gtk_widget`)
|
||
* @MODULE: The name of the module, in all caps (like `GTK`)
|
||
* @OBJ_NAME: The bare name of the type, in all caps (like `WIDGET`)
|
||
* @ParentName: the name of the parent type, in camel case (like `GtkWidget`)
|
||
*
|
||
* A convenience macro for emitting the usual declarations in the
|
||
* header file for a type which is intended to be subclassed.
|
||
*
|
||
* You might use it in a header as follows:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* #ifndef _gtk_frobber_h_
|
||
* #define _gtk_frobber_h_
|
||
*
|
||
* #define GTK_TYPE_FROBBER gtk_frobber_get_type ()
|
||
* GDK_AVAILABLE_IN_3_12
|
||
* G_DECLARE_DERIVABLE_TYPE (GtkFrobber, gtk_frobber, GTK, FROBBER, GtkWidget)
|
||
*
|
||
* struct _GtkFrobberClass
|
||
* {
|
||
* GtkWidgetClass parent_class;
|
||
*
|
||
* void (* handle_frob) (GtkFrobber *frobber,
|
||
* guint n_frobs);
|
||
*
|
||
* gpointer padding[12];
|
||
* };
|
||
*
|
||
* GtkWidget * gtk_frobber_new (void);
|
||
*
|
||
* ...
|
||
*
|
||
* #endif
|
||
* ]|
|
||
*
|
||
* Since the instance structure is public it is often needed to declare a
|
||
* private struct as follow in your C file:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* typedef struct _GtkFrobberPrivate GtkFrobberPrivate;
|
||
* struct _GtkFrobberPrivate
|
||
* {
|
||
* ...
|
||
* };
|
||
* G_DEFINE_TYPE_WITH_PRIVATE (GtkFrobber, gtk_frobber, GTK_TYPE_WIDGET)
|
||
* ]|
|
||
*
|
||
* This results in the following things happening:
|
||
*
|
||
* - the usual `gtk_frobber_get_type()` function is declared with a return type of #GType
|
||
*
|
||
* - the `GtkFrobber` struct is created with `GtkWidget` as the first and only item. You are expected to use
|
||
* a private structure from your .c file to store your instance variables.
|
||
*
|
||
* - the `GtkFrobberClass` type is defined as a typedef to `struct _GtkFrobberClass`, which is left undefined.
|
||
* You should do this from the header file directly after you use the macro.
|
||
*
|
||
* - the `GTK_FROBBER()` and `GTK_FROBBER_CLASS()` casts are emitted as `static inline` functions along with
|
||
* the `GTK_IS_FROBBER()` and `GTK_IS_FROBBER_CLASS()` type checking functions and `GTK_FROBBER_GET_CLASS()`
|
||
* function.
|
||
*
|
||
* - g_autoptr() support being added for your type, based on the type of your parent class
|
||
*
|
||
* You can only use this function if your parent type also supports g_autoptr().
|
||
*
|
||
* Because the type macro (`GTK_TYPE_FROBBER` in the above example) is not a callable, you must continue to
|
||
* manually define this as a macro for yourself.
|
||
*
|
||
* The declaration of the `_get_type()` function is the first thing emitted by the macro. This allows this macro
|
||
* to be used in the usual way with export control and API versioning macros.
|
||
*
|
||
* If you are writing a library, it is important to note that it is possible to convert a type from using
|
||
* G_DECLARE_FINAL_TYPE() to G_DECLARE_DERIVABLE_TYPE() without breaking API or ABI. As a precaution, you
|
||
* should therefore use G_DECLARE_FINAL_TYPE() until you are sure that it makes sense for your class to be
|
||
* subclassed. Once a class structure has been exposed it is not possible to change its size or remove or
|
||
* reorder items without breaking the API and/or ABI. If you want to declare your own class structure, use
|
||
* G_DECLARE_DERIVABLE_TYPE(). If you want to declare a class without exposing the class or instance
|
||
* structures, use G_DECLARE_FINAL_TYPE().
|
||
*
|
||
* If you must use G_DECLARE_DERIVABLE_TYPE() you should be sure to include some padding at the bottom of your
|
||
* class structure to leave space for the addition of future virtual functions.
|
||
*
|
||
* Since: 2.44
|
||
**/
|
||
#define G_DECLARE_DERIVABLE_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName) \
|
||
GType module_obj_name##_get_type (void); \
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
|
||
typedef struct _##ModuleObjName ModuleObjName; \
|
||
typedef struct _##ModuleObjName##Class ModuleObjName##Class; \
|
||
struct _##ModuleObjName { ParentName parent_instance; }; \
|
||
\
|
||
_GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, ParentName) \
|
||
G_DEFINE_AUTOPTR_CLEANUP_FUNC (ModuleObjName##Class, g_type_class_unref) \
|
||
\
|
||
G_GNUC_UNUSED static inline ModuleObjName * MODULE##_##OBJ_NAME (gpointer ptr) { \
|
||
return G_TYPE_CHECK_INSTANCE_CAST (ptr, module_obj_name##_get_type (), ModuleObjName); } \
|
||
G_GNUC_UNUSED static inline ModuleObjName##Class * MODULE##_##OBJ_NAME##_CLASS (gpointer ptr) { \
|
||
return G_TYPE_CHECK_CLASS_CAST (ptr, module_obj_name##_get_type (), ModuleObjName##Class); } \
|
||
G_GNUC_UNUSED static inline gboolean MODULE##_IS_##OBJ_NAME (gpointer ptr) { \
|
||
return G_TYPE_CHECK_INSTANCE_TYPE (ptr, module_obj_name##_get_type ()); } \
|
||
G_GNUC_UNUSED static inline gboolean MODULE##_IS_##OBJ_NAME##_CLASS (gpointer ptr) { \
|
||
return G_TYPE_CHECK_CLASS_TYPE (ptr, module_obj_name##_get_type ()); } \
|
||
G_GNUC_UNUSED static inline ModuleObjName##Class * MODULE##_##OBJ_NAME##_GET_CLASS (gpointer ptr) { \
|
||
return G_TYPE_INSTANCE_GET_CLASS (ptr, module_obj_name##_get_type (), ModuleObjName##Class); } \
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
/**
|
||
* G_DECLARE_INTERFACE:
|
||
* @ModuleObjName: The name of the new type, in camel case (like `GtkWidget`)
|
||
* @module_obj_name: The name of the new type in lowercase, with words
|
||
* separated by `_` (like `gtk_widget`)
|
||
* @MODULE: The name of the module, in all caps (like `GTK`)
|
||
* @OBJ_NAME: The bare name of the type, in all caps (like `WIDGET`)
|
||
* @PrerequisiteName: the name of the prerequisite type, in camel case (like `GtkWidget`)
|
||
*
|
||
* A convenience macro for emitting the usual declarations in the header file for a #GInterface type.
|
||
*
|
||
* You might use it in a header as follows:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* #ifndef _my_model_h_
|
||
* #define _my_model_h_
|
||
*
|
||
* #define MY_TYPE_MODEL my_model_get_type ()
|
||
* GDK_AVAILABLE_IN_3_12
|
||
* G_DECLARE_INTERFACE (MyModel, my_model, MY, MODEL, GObject)
|
||
*
|
||
* struct _MyModelInterface
|
||
* {
|
||
* GTypeInterface g_iface;
|
||
*
|
||
* gpointer (* get_item) (MyModel *model);
|
||
* };
|
||
*
|
||
* gpointer my_model_get_item (MyModel *model);
|
||
*
|
||
* ...
|
||
*
|
||
* #endif
|
||
* ]|
|
||
*
|
||
* And use it as follow in your C file:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* G_DEFINE_INTERFACE (MyModel, my_model, G_TYPE_OBJECT);
|
||
*
|
||
* static void
|
||
* my_model_default_init (MyModelInterface *iface)
|
||
* {
|
||
* ...
|
||
* }
|
||
* ]|
|
||
*
|
||
* This results in the following things happening:
|
||
*
|
||
* - the usual `my_model_get_type()` function is declared with a return type of #GType
|
||
*
|
||
* - the `MyModelInterface` type is defined as a typedef to `struct _MyModelInterface`,
|
||
* which is left undefined. You should do this from the header file directly after
|
||
* you use the macro.
|
||
*
|
||
* - the `MY_MODEL()` cast is emitted as `static inline` functions along with
|
||
* the `MY_IS_MODEL()` type checking function and `MY_MODEL_GET_IFACE()` function.
|
||
*
|
||
* - g_autoptr() support being added for your type, based on your prerequisite type.
|
||
*
|
||
* You can only use this function if your prerequisite type also supports g_autoptr().
|
||
*
|
||
* Because the type macro (`MY_TYPE_MODEL` in the above example) is not a callable, you must continue to
|
||
* manually define this as a macro for yourself.
|
||
*
|
||
* The declaration of the `_get_type()` function is the first thing emitted by the macro. This allows this macro
|
||
* to be used in the usual way with export control and API versioning macros.
|
||
*
|
||
* Since: 2.44
|
||
**/
|
||
#define G_DECLARE_INTERFACE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, PrerequisiteName) \
|
||
GType module_obj_name##_get_type (void); \
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
|
||
typedef struct _##ModuleObjName ModuleObjName; \
|
||
typedef struct _##ModuleObjName##Interface ModuleObjName##Interface; \
|
||
\
|
||
_GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, PrerequisiteName) \
|
||
\
|
||
G_GNUC_UNUSED static inline ModuleObjName * MODULE##_##OBJ_NAME (gpointer ptr) { \
|
||
return G_TYPE_CHECK_INSTANCE_CAST (ptr, module_obj_name##_get_type (), ModuleObjName); } \
|
||
G_GNUC_UNUSED static inline gboolean MODULE##_IS_##OBJ_NAME (gpointer ptr) { \
|
||
return G_TYPE_CHECK_INSTANCE_TYPE (ptr, module_obj_name##_get_type ()); } \
|
||
G_GNUC_UNUSED static inline ModuleObjName##Interface * MODULE##_##OBJ_NAME##_GET_IFACE (gpointer ptr) { \
|
||
return G_TYPE_INSTANCE_GET_INTERFACE (ptr, module_obj_name##_get_type (), ModuleObjName##Interface); } \
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
/**
|
||
* G_DEFINE_TYPE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words
|
||
* separated by `_`.
|
||
* @T_P: The #GType of the parent type.
|
||
*
|
||
* A convenience macro for type implementations, which declares a class
|
||
* initialization function, an instance initialization function (see #GTypeInfo
|
||
* for information about these) and a static variable named `t_n_parent_class`
|
||
* pointing to the parent class. Furthermore, it defines a `*_get_type()` function.
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
#define G_DEFINE_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, {})
|
||
/**
|
||
* G_DEFINE_TYPE_WITH_CODE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type in lowercase, with words separated by `_`.
|
||
* @T_P: The #GType of the parent type.
|
||
* @_C_: Custom code that gets inserted in the `*_get_type()` function.
|
||
*
|
||
* A convenience macro for type implementations.
|
||
*
|
||
* Similar to G_DEFINE_TYPE(), but allows you to insert custom code into the
|
||
* `*_get_type()` function, e.g. interface implementations via G_IMPLEMENT_INTERFACE().
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
#define G_DEFINE_TYPE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, 0) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
|
||
/**
|
||
* G_DEFINE_TYPE_WITH_PRIVATE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words
|
||
* separated by `_`.
|
||
* @T_P: The #GType of the parent type.
|
||
*
|
||
* A convenience macro for type implementations, which declares a class
|
||
* initialization function, an instance initialization function (see #GTypeInfo
|
||
* for information about these), a static variable named `t_n_parent_class`
|
||
* pointing to the parent class, and adds private instance data to the type.
|
||
*
|
||
* Furthermore, it defines a `*_get_type()` function. See G_DEFINE_TYPE_EXTENDED()
|
||
* for an example.
|
||
*
|
||
* Note that private structs added with this macros must have a struct
|
||
* name of the form `TN ## Private`.
|
||
*
|
||
* The private instance data can be retrieved using the automatically generated
|
||
* getter function `t_n_get_instance_private()`.
|
||
*
|
||
* See also: G_ADD_PRIVATE()
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
#define G_DEFINE_TYPE_WITH_PRIVATE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, G_ADD_PRIVATE (TN))
|
||
/**
|
||
* G_DEFINE_ABSTRACT_TYPE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words
|
||
* separated by `_`.
|
||
* @T_P: The #GType of the parent type.
|
||
*
|
||
* A convenience macro for type implementations.
|
||
*
|
||
* Similar to G_DEFINE_TYPE(), but defines an abstract type.
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
#define G_DEFINE_ABSTRACT_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, {})
|
||
/**
|
||
* G_DEFINE_ABSTRACT_TYPE_WITH_CODE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words
|
||
* separated by `_`.
|
||
* @T_P: The #GType of the parent type.
|
||
* @_C_: Custom code that gets inserted in the `type_name_get_type()` function.
|
||
*
|
||
* A convenience macro for type implementations.
|
||
*
|
||
* Similar to G_DEFINE_TYPE_WITH_CODE(), but defines an abstract type and
|
||
* allows you to insert custom code into the `*_get_type()` function, e.g.
|
||
* interface implementations via G_IMPLEMENT_INTERFACE().
|
||
*
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
#define G_DEFINE_ABSTRACT_TYPE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
|
||
/**
|
||
* G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words
|
||
* separated by `_`.
|
||
* @T_P: The #GType of the parent type.
|
||
*
|
||
* Similar to G_DEFINE_TYPE_WITH_PRIVATE(), but defines an abstract type.
|
||
*
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
#define G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, G_ADD_PRIVATE (TN))
|
||
/**
|
||
* G_DEFINE_FINAL_TYPE:
|
||
* @TN: the name of the new type, in Camel case
|
||
* @t_n: the name of the new type, in lower case, with words
|
||
* separated by `_` (snake case)
|
||
* @T_P: the #GType of the parent type
|
||
*
|
||
* A convenience macro for type implementations.
|
||
*
|
||
* Similar to G_DEFINE_TYPE(), but defines a final type.
|
||
*
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.70
|
||
*/
|
||
#define G_DEFINE_FINAL_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_FINAL, {}) GOBJECT_AVAILABLE_MACRO_IN_2_70
|
||
/**
|
||
* G_DEFINE_FINAL_TYPE_WITH_CODE:
|
||
* @TN: the name of the new type, in Camel case
|
||
* @t_n: the name of the new type, in lower case, with words
|
||
* separated by `_` (snake case)
|
||
* @T_P: the #GType of the parent type
|
||
* @_C_: Custom code that gets inserted in the `type_name_get_type()` function.
|
||
*
|
||
* A convenience macro for type implementations.
|
||
*
|
||
* Similar to G_DEFINE_TYPE_WITH_CODE(), but defines a final type and
|
||
* allows you to insert custom code into the `*_get_type()` function, e.g.
|
||
* interface implementations via G_IMPLEMENT_INTERFACE().
|
||
*
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.70
|
||
*/
|
||
#define G_DEFINE_FINAL_TYPE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, G_TYPE_FLAG_FINAL) {_C_;} _G_DEFINE_TYPE_EXTENDED_END() GOBJECT_AVAILABLE_MACRO_IN_2_70
|
||
/**
|
||
* G_DEFINE_FINAL_TYPE_WITH_PRIVATE:
|
||
* @TN: the name of the new type, in Camel case
|
||
* @t_n: the name of the new type, in lower case, with words
|
||
* separated by `_` (snake case)
|
||
* @T_P: the #GType of the parent type
|
||
*
|
||
* A convenience macro for type implementations.
|
||
*
|
||
* Similar to G_DEFINE_TYPE_WITH_PRIVATE(), but defines a final type.
|
||
*
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Since: 2.70
|
||
*/
|
||
#define G_DEFINE_FINAL_TYPE_WITH_PRIVATE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_FINAL, G_ADD_PRIVATE (TN)) GOBJECT_AVAILABLE_MACRO_IN_2_70
|
||
/**
|
||
* G_DEFINE_TYPE_EXTENDED:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words
|
||
* separated by `_`.
|
||
* @T_P: The #GType of the parent type.
|
||
* @_f_: #GTypeFlags to pass to g_type_register_static()
|
||
* @_C_: Custom code that gets inserted in the `*_get_type()` function.
|
||
*
|
||
* The most general convenience macro for type implementations, on which
|
||
* G_DEFINE_TYPE(), etc are based.
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* G_DEFINE_TYPE_EXTENDED (GtkGadget,
|
||
* gtk_gadget,
|
||
* GTK_TYPE_WIDGET,
|
||
* 0,
|
||
* G_ADD_PRIVATE (GtkGadget)
|
||
* G_IMPLEMENT_INTERFACE (TYPE_GIZMO,
|
||
* gtk_gadget_gizmo_init));
|
||
* ]|
|
||
*
|
||
* expands to
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* static void gtk_gadget_init (GtkGadget *self);
|
||
* static void gtk_gadget_class_init (GtkGadgetClass *klass);
|
||
* static gpointer gtk_gadget_parent_class = NULL;
|
||
* static gint GtkGadget_private_offset;
|
||
* static void gtk_gadget_class_intern_init (gpointer klass)
|
||
* {
|
||
* gtk_gadget_parent_class = g_type_class_peek_parent (klass);
|
||
* if (GtkGadget_private_offset != 0)
|
||
* g_type_class_adjust_private_offset (klass, &GtkGadget_private_offset);
|
||
* gtk_gadget_class_init ((GtkGadgetClass*) klass);
|
||
* }
|
||
* static inline gpointer gtk_gadget_get_instance_private (GtkGadget *self)
|
||
* {
|
||
* return (G_STRUCT_MEMBER_P (self, GtkGadget_private_offset));
|
||
* }
|
||
*
|
||
* GType
|
||
* gtk_gadget_get_type (void)
|
||
* {
|
||
* static GType static_g_define_type_id = 0;
|
||
* if (g_once_init_enter_pointer (&static_g_define_type_id))
|
||
* {
|
||
* GType g_define_type_id =
|
||
* g_type_register_static_simple (GTK_TYPE_WIDGET,
|
||
* g_intern_static_string ("GtkGadget"),
|
||
* sizeof (GtkGadgetClass),
|
||
* (GClassInitFunc) gtk_gadget_class_intern_init,
|
||
* sizeof (GtkGadget),
|
||
* (GInstanceInitFunc) gtk_gadget_init,
|
||
* 0);
|
||
* {
|
||
* GtkGadget_private_offset =
|
||
* g_type_add_instance_private (g_define_type_id, sizeof (GtkGadgetPrivate));
|
||
* }
|
||
* {
|
||
* const GInterfaceInfo g_implement_interface_info = {
|
||
* (GInterfaceInitFunc) gtk_gadget_gizmo_init
|
||
* };
|
||
* g_type_add_interface_static (g_define_type_id, TYPE_GIZMO, &g_implement_interface_info);
|
||
* }
|
||
* g_once_init_leave_pointer (&static_g_define_type_id, g_define_type_id);
|
||
* }
|
||
* return static_g_define_type_id;
|
||
* }
|
||
* ]|
|
||
*
|
||
* The only pieces which have to be manually provided are the definitions of
|
||
* the instance and class structure and the definitions of the instance and
|
||
* class init functions.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
#define G_DEFINE_TYPE_EXTENDED(TN, t_n, T_P, _f_, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, _f_) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
|
||
|
||
/**
|
||
* G_DEFINE_INTERFACE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words separated by `_`.
|
||
* @T_P: The #GType of the prerequisite type for the interface, or %G_TYPE_INVALID
|
||
* for no prerequisite type.
|
||
*
|
||
* A convenience macro for #GTypeInterface definitions, which declares
|
||
* a default vtable initialization function and defines a `*_get_type()`
|
||
* function.
|
||
*
|
||
* The macro expects the interface initialization function to have the
|
||
* name `t_n ## _default_init`, and the interface structure to have the
|
||
* name `TN ## Interface`.
|
||
*
|
||
* The initialization function has signature
|
||
* `static void t_n ## _default_init (TypeName##Interface *klass);`, rather than
|
||
* the full #GInterfaceInitFunc signature, for brevity and convenience. If you
|
||
* need to use an initialization function with an `iface_data` argument, you
|
||
* must write the #GTypeInterface definitions manually.
|
||
*
|
||
* Since: 2.24
|
||
*/
|
||
#define G_DEFINE_INTERFACE(TN, t_n, T_P) G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, ;)
|
||
|
||
/**
|
||
* G_DEFINE_INTERFACE_WITH_CODE:
|
||
* @TN: The name of the new type, in Camel case.
|
||
* @t_n: The name of the new type, in lowercase, with words separated by `_`.
|
||
* @T_P: The #GType of the prerequisite type for the interface, or %G_TYPE_INVALID
|
||
* for no prerequisite type.
|
||
* @_C_: Custom code that gets inserted in the `*_get_type()` function.
|
||
*
|
||
* A convenience macro for #GTypeInterface definitions.
|
||
*
|
||
* Similar to G_DEFINE_INTERFACE(), but allows you to insert custom code
|
||
* into the `*_get_type()` function, e.g. additional interface implementations
|
||
* via G_IMPLEMENT_INTERFACE(), or additional prerequisite types.
|
||
*
|
||
* See G_DEFINE_TYPE_EXTENDED() for a similar example using
|
||
* G_DEFINE_TYPE_WITH_CODE().
|
||
*
|
||
* Since: 2.24
|
||
*/
|
||
#define G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_INTERFACE_EXTENDED_BEGIN(TN, t_n, T_P) {_C_;} _G_DEFINE_INTERFACE_EXTENDED_END()
|
||
|
||
/**
|
||
* G_IMPLEMENT_INTERFACE:
|
||
* @TYPE_IFACE: The #GType of the interface to add
|
||
* @iface_init: (type GInterfaceInitFunc): The interface init function, of type #GInterfaceInitFunc
|
||
*
|
||
* A convenience macro to ease interface addition in the `_C_` section
|
||
* of G_DEFINE_TYPE_WITH_CODE() or G_DEFINE_ABSTRACT_TYPE_WITH_CODE().
|
||
* See G_DEFINE_TYPE_EXTENDED() for an example.
|
||
*
|
||
* Note that this macro can only be used together with the `G_DEFINE_TYPE_*`
|
||
* macros, since it depends on variable names from those macros.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
#define G_IMPLEMENT_INTERFACE(TYPE_IFACE, iface_init) { \
|
||
const GInterfaceInfo g_implement_interface_info = { \
|
||
(GInterfaceInitFunc)(void (*)(void)) iface_init, NULL, NULL \
|
||
}; \
|
||
g_type_add_interface_static (g_define_type_id, TYPE_IFACE, &g_implement_interface_info); \
|
||
}
|
||
|
||
/**
|
||
* G_ADD_PRIVATE:
|
||
* @TypeName: the name of the type in CamelCase
|
||
*
|
||
* A convenience macro to ease adding private data to instances of a new type
|
||
* in the @_C_ section of G_DEFINE_TYPE_WITH_CODE() or
|
||
* G_DEFINE_ABSTRACT_TYPE_WITH_CODE().
|
||
*
|
||
* For instance:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* typedef struct _MyObject MyObject;
|
||
* typedef struct _MyObjectClass MyObjectClass;
|
||
*
|
||
* typedef struct {
|
||
* gint foo;
|
||
* gint bar;
|
||
* } MyObjectPrivate;
|
||
*
|
||
* G_DEFINE_TYPE_WITH_CODE (MyObject, my_object, G_TYPE_OBJECT,
|
||
* G_ADD_PRIVATE (MyObject))
|
||
* ]|
|
||
*
|
||
* Will add `MyObjectPrivate` as the private data to any instance of the
|
||
* `MyObject` type.
|
||
*
|
||
* `G_DEFINE_TYPE_*` macros will automatically create a private function
|
||
* based on the arguments to this macro, which can be used to safely
|
||
* retrieve the private data from an instance of the type; for instance:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* gint
|
||
* my_object_get_foo (MyObject *obj)
|
||
* {
|
||
* MyObjectPrivate *priv = my_object_get_instance_private (obj);
|
||
*
|
||
* g_return_val_if_fail (MY_IS_OBJECT (obj), 0);
|
||
*
|
||
* return priv->foo;
|
||
* }
|
||
*
|
||
* void
|
||
* my_object_set_bar (MyObject *obj,
|
||
* gint bar)
|
||
* {
|
||
* MyObjectPrivate *priv = my_object_get_instance_private (obj);
|
||
*
|
||
* g_return_if_fail (MY_IS_OBJECT (obj));
|
||
*
|
||
* if (priv->bar != bar)
|
||
* priv->bar = bar;
|
||
* }
|
||
* ]|
|
||
*
|
||
* Since GLib 2.72, the returned `MyObjectPrivate` pointer is guaranteed to be
|
||
* aligned to at least the alignment of the largest basic GLib type (typically
|
||
* this is #guint64 or #gdouble). If you need larger alignment for an element in
|
||
* the struct, you should allocate it on the heap (aligned), or arrange for your
|
||
* `MyObjectPrivate` struct to be appropriately padded.
|
||
*
|
||
* Note that this macro can only be used together with the `G_DEFINE_TYPE_*`
|
||
* macros, since it depends on variable names from those macros.
|
||
*
|
||
* Also note that private structs added with these macros must have a struct
|
||
* name of the form `TypeNamePrivate`.
|
||
*
|
||
* It is safe to call the `_get_instance_private` function on %NULL or invalid
|
||
* objects since it's only adding an offset to the instance pointer. In that
|
||
* case the returned pointer must not be dereferenced.
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
#define G_ADD_PRIVATE(TypeName) { \
|
||
TypeName##_private_offset = \
|
||
g_type_add_instance_private (g_define_type_id, sizeof (TypeName##Private)); \
|
||
}
|
||
|
||
/**
|
||
* G_PRIVATE_OFFSET:
|
||
* @TypeName: the name of the type in CamelCase
|
||
* @field: the name of the field in the private data structure
|
||
*
|
||
* Evaluates to the offset of the @field inside the instance private data
|
||
* structure for @TypeName.
|
||
*
|
||
* Note that this macro can only be used together with the `G_DEFINE_TYPE_*`
|
||
* and G_ADD_PRIVATE() macros, since it depends on variable names from
|
||
* those macros.
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
#define G_PRIVATE_OFFSET(TypeName, field) \
|
||
(TypeName##_private_offset + (G_STRUCT_OFFSET (TypeName##Private, field)))
|
||
|
||
/**
|
||
* G_PRIVATE_FIELD_P:
|
||
* @TypeName: the name of the type in CamelCase
|
||
* @inst: the instance of @TypeName you wish to access
|
||
* @field_name: the name of the field in the private data structure
|
||
*
|
||
* Evaluates to a pointer to the @field_name inside the @inst private data
|
||
* structure for @TypeName.
|
||
*
|
||
* Note that this macro can only be used together with the `G_DEFINE_TYPE_*`
|
||
* and G_ADD_PRIVATE() macros, since it depends on variable names from
|
||
* those macros.
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
#define G_PRIVATE_FIELD_P(TypeName, inst, field_name) \
|
||
G_STRUCT_MEMBER_P (inst, G_PRIVATE_OFFSET (TypeName, field_name))
|
||
|
||
/**
|
||
* G_PRIVATE_FIELD:
|
||
* @TypeName: the name of the type in CamelCase
|
||
* @inst: the instance of @TypeName you wish to access
|
||
* @field_type: the type of the field in the private data structure
|
||
* @field_name: the name of the field in the private data structure
|
||
*
|
||
* Evaluates to the @field_name inside the @inst private data
|
||
* structure for @TypeName.
|
||
*
|
||
* Note that this macro can only be used together with the `G_DEFINE_TYPE_*`
|
||
* and G_ADD_PRIVATE() macros, since it depends on variable names from
|
||
* those macros.
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
#define G_PRIVATE_FIELD(TypeName, inst, field_type, field_name) \
|
||
G_STRUCT_MEMBER (field_type, inst, G_PRIVATE_OFFSET (TypeName, field_name))
|
||
|
||
/* we need to have this macro under conditional expansion, as it references
|
||
* a function that has been added in 2.38. see bug:
|
||
* https://bugzilla.gnome.org/show_bug.cgi?id=703191
|
||
*/
|
||
#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38
|
||
#define _G_DEFINE_TYPE_EXTENDED_CLASS_INIT(TypeName, type_name) \
|
||
static void type_name##_class_intern_init (gpointer klass) \
|
||
{ \
|
||
type_name##_parent_class = g_type_class_peek_parent (klass); \
|
||
if (TypeName##_private_offset != 0) \
|
||
g_type_class_adjust_private_offset (klass, &TypeName##_private_offset); \
|
||
type_name##_class_init ((TypeName##Class*) klass); \
|
||
}
|
||
|
||
#else
|
||
#define _G_DEFINE_TYPE_EXTENDED_CLASS_INIT(TypeName, type_name) \
|
||
static void type_name##_class_intern_init (gpointer klass) \
|
||
{ \
|
||
type_name##_parent_class = g_type_class_peek_parent (klass); \
|
||
type_name##_class_init ((TypeName##Class*) klass); \
|
||
}
|
||
#endif /* GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38 */
|
||
|
||
#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_80
|
||
#define _g_type_once_init_type GType
|
||
#define _g_type_once_init_enter g_once_init_enter_pointer
|
||
#define _g_type_once_init_leave g_once_init_leave_pointer
|
||
#else /* if GLIB_VERSION_MAX_ALLOWED < GLIB_VERSION_2_80 */
|
||
#define _g_type_once_init_type gsize
|
||
#define _g_type_once_init_enter g_once_init_enter
|
||
#define _g_type_once_init_leave g_once_init_leave
|
||
#endif /* GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_80 */
|
||
|
||
/* Added for _G_DEFINE_TYPE_EXTENDED_WITH_PRELUDE */
|
||
#define _G_DEFINE_TYPE_EXTENDED_BEGIN_PRE(TypeName, type_name, TYPE_PARENT) \
|
||
\
|
||
static void type_name##_init (TypeName *self); \
|
||
static void type_name##_class_init (TypeName##Class *klass); \
|
||
static GType type_name##_get_type_once (void); \
|
||
static gpointer type_name##_parent_class = NULL; \
|
||
static gint TypeName##_private_offset; \
|
||
\
|
||
_G_DEFINE_TYPE_EXTENDED_CLASS_INIT(TypeName, type_name) \
|
||
\
|
||
G_GNUC_UNUSED \
|
||
static inline gpointer \
|
||
type_name##_get_instance_private (TypeName *self) \
|
||
{ \
|
||
return (G_STRUCT_MEMBER_P (self, TypeName##_private_offset)); \
|
||
} \
|
||
\
|
||
GType \
|
||
type_name##_get_type (void) \
|
||
{ \
|
||
static _g_type_once_init_type static_g_define_type_id = 0;
|
||
/* Prelude goes here */
|
||
|
||
/* Added for _G_DEFINE_TYPE_EXTENDED_WITH_PRELUDE */
|
||
#define _G_DEFINE_TYPE_EXTENDED_BEGIN_REGISTER(TypeName, type_name, TYPE_PARENT, flags) \
|
||
if (_g_type_once_init_enter (&static_g_define_type_id)) \
|
||
{ \
|
||
GType g_define_type_id = type_name##_get_type_once (); \
|
||
_g_type_once_init_leave (&static_g_define_type_id, g_define_type_id); \
|
||
} \
|
||
return static_g_define_type_id; \
|
||
} /* closes type_name##_get_type() */ \
|
||
\
|
||
G_NO_INLINE \
|
||
static GType \
|
||
type_name##_get_type_once (void) \
|
||
{ \
|
||
GType g_define_type_id = \
|
||
g_type_register_static_simple (TYPE_PARENT, \
|
||
g_intern_static_string (#TypeName), \
|
||
sizeof (TypeName##Class), \
|
||
(GClassInitFunc)(void (*)(void)) type_name##_class_intern_init, \
|
||
sizeof (TypeName), \
|
||
(GInstanceInitFunc)(void (*)(void)) type_name##_init, \
|
||
(GTypeFlags) flags); \
|
||
{ /* custom code follows */
|
||
#define _G_DEFINE_TYPE_EXTENDED_END() \
|
||
/* following custom code */ \
|
||
} \
|
||
return g_define_type_id; \
|
||
} /* closes type_name##_get_type_once() */
|
||
|
||
/* This was defined before we had G_DEFINE_TYPE_WITH_CODE_AND_PRELUDE, it's simplest
|
||
* to keep it.
|
||
*/
|
||
#define _G_DEFINE_TYPE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PARENT, flags) \
|
||
_G_DEFINE_TYPE_EXTENDED_BEGIN_PRE(TypeName, type_name, TYPE_PARENT) \
|
||
_G_DEFINE_TYPE_EXTENDED_BEGIN_REGISTER(TypeName, type_name, TYPE_PARENT, flags) \
|
||
|
||
/* Intentionally using (GTypeFlags) 0 instead of G_TYPE_FLAG_NONE here,
|
||
* to avoid deprecation warnings with older GLIB_VERSION_MAX_ALLOWED */
|
||
#define _G_DEFINE_INTERFACE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PREREQ) \
|
||
\
|
||
static void type_name##_default_init (TypeName##Interface *klass); \
|
||
\
|
||
GType \
|
||
type_name##_get_type (void) \
|
||
{ \
|
||
static _g_type_once_init_type static_g_define_type_id = 0; \
|
||
if (_g_type_once_init_enter (&static_g_define_type_id)) \
|
||
{ \
|
||
GType g_define_type_id = \
|
||
g_type_register_static_simple (G_TYPE_INTERFACE, \
|
||
g_intern_static_string (#TypeName), \
|
||
sizeof (TypeName##Interface), \
|
||
(GClassInitFunc)(void (*)(void)) type_name##_default_init, \
|
||
0, \
|
||
(GInstanceInitFunc)NULL, \
|
||
(GTypeFlags) 0); \
|
||
if (TYPE_PREREQ != G_TYPE_INVALID) \
|
||
g_type_interface_add_prerequisite (g_define_type_id, TYPE_PREREQ); \
|
||
{ /* custom code follows */
|
||
#define _G_DEFINE_INTERFACE_EXTENDED_END() \
|
||
/* following custom code */ \
|
||
} \
|
||
_g_type_once_init_leave (&static_g_define_type_id, g_define_type_id); \
|
||
} \
|
||
return static_g_define_type_id; \
|
||
} /* closes type_name##_get_type() */
|
||
|
||
/**
|
||
* G_DEFINE_BOXED_TYPE:
|
||
* @TypeName: The name of the new type, in Camel case
|
||
* @type_name: The name of the new type, in lowercase, with words
|
||
* separated by `_`
|
||
* @copy_func: the #GBoxedCopyFunc for the new type
|
||
* @free_func: the #GBoxedFreeFunc for the new type
|
||
*
|
||
* A convenience macro for defining a new custom boxed type.
|
||
*
|
||
* Using this macro is the recommended way of defining new custom boxed
|
||
* types, over calling g_boxed_type_register_static() directly. It defines
|
||
* a `type_name_get_type()` function which will return the newly defined
|
||
* #GType, enabling lazy instantiation.
|
||
*
|
||
* You might start by putting declarations in a header as follows:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* #define MY_TYPE_STRUCT my_struct_get_type ()
|
||
* GType my_struct_get_type (void) G_GNUC_CONST;
|
||
*
|
||
* MyStruct * my_struct_new (void);
|
||
* void my_struct_free (MyStruct *self);
|
||
* MyStruct * my_struct_copy (MyStruct *self);
|
||
* ]|
|
||
*
|
||
* And then use this macro and define your implementation in the source file as
|
||
* follows:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* MyStruct *
|
||
* my_struct_new (void)
|
||
* {
|
||
* // ... your code to allocate a new MyStruct ...
|
||
* }
|
||
*
|
||
* void
|
||
* my_struct_free (MyStruct *self)
|
||
* {
|
||
* // ... your code to free a MyStruct ...
|
||
* }
|
||
*
|
||
* MyStruct *
|
||
* my_struct_copy (MyStruct *self)
|
||
* {
|
||
* // ... your code return a newly allocated copy of a MyStruct ...
|
||
* }
|
||
*
|
||
* G_DEFINE_BOXED_TYPE (MyStruct, my_struct, my_struct_copy, my_struct_free)
|
||
*
|
||
* void
|
||
* foo ()
|
||
* {
|
||
* MyStruct *ms;
|
||
*
|
||
* ms = my_struct_new ();
|
||
* // ... your code ...
|
||
* my_struct_free (ms);
|
||
* }
|
||
* ]|
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
#define G_DEFINE_BOXED_TYPE(TypeName, type_name, copy_func, free_func) G_DEFINE_BOXED_TYPE_WITH_CODE (TypeName, type_name, copy_func, free_func, {})
|
||
/**
|
||
* G_DEFINE_BOXED_TYPE_WITH_CODE:
|
||
* @TypeName: The name of the new type, in Camel case
|
||
* @type_name: The name of the new type, in lowercase, with words
|
||
* separated by `_`
|
||
* @copy_func: the #GBoxedCopyFunc for the new type
|
||
* @free_func: the #GBoxedFreeFunc for the new type
|
||
* @_C_: Custom code that gets inserted in the `*_get_type()` function
|
||
*
|
||
* A convenience macro for boxed type implementations.
|
||
*
|
||
* Similar to G_DEFINE_BOXED_TYPE(), but allows to insert custom code into the
|
||
* `type_name_get_type()` function, e.g. to register value transformations with
|
||
* g_value_register_transform_func(), for instance:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* G_DEFINE_BOXED_TYPE_WITH_CODE (GdkRectangle, gdk_rectangle,
|
||
* gdk_rectangle_copy,
|
||
* gdk_rectangle_free,
|
||
* register_rectangle_transform_funcs (g_define_type_id))
|
||
* ]|
|
||
*
|
||
* Similarly to the `G_DEFINE_TYPE_*` family of macros, the #GType of the newly
|
||
* defined boxed type is exposed in the `g_define_type_id` variable.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
#define G_DEFINE_BOXED_TYPE_WITH_CODE(TypeName, type_name, copy_func, free_func, _C_) _G_DEFINE_BOXED_TYPE_BEGIN (TypeName, type_name, copy_func, free_func) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
|
||
|
||
/* Only use this in non-C++ on GCC >= 2.7, except for Darwin/ppc64.
|
||
* See https://bugzilla.gnome.org/show_bug.cgi?id=647145
|
||
*/
|
||
#if !defined (G_CXX_STD_VERSION) && (G_GNUC_CHECK_VERSION(2, 7)) && \
|
||
!(defined (__APPLE__) && defined (__ppc64__))
|
||
#define _G_DEFINE_BOXED_TYPE_BEGIN(TypeName, type_name, copy_func, free_func) \
|
||
static GType type_name##_get_type_once (void); \
|
||
\
|
||
GType \
|
||
type_name##_get_type (void) \
|
||
{ \
|
||
static _g_type_once_init_type static_g_define_type_id = 0; \
|
||
if (_g_type_once_init_enter (&static_g_define_type_id)) \
|
||
{ \
|
||
GType g_define_type_id = type_name##_get_type_once (); \
|
||
_g_type_once_init_leave (&static_g_define_type_id, g_define_type_id); \
|
||
} \
|
||
return static_g_define_type_id; \
|
||
} \
|
||
\
|
||
G_NO_INLINE \
|
||
static GType \
|
||
type_name##_get_type_once (void) \
|
||
{ \
|
||
GType (* _g_register_boxed) \
|
||
(const gchar *, \
|
||
union \
|
||
{ \
|
||
TypeName * (*do_copy_type) (TypeName *); \
|
||
TypeName * (*do_const_copy_type) (const TypeName *); \
|
||
GBoxedCopyFunc do_copy_boxed; \
|
||
} __attribute__((__transparent_union__)), \
|
||
union \
|
||
{ \
|
||
void (* do_free_type) (TypeName *); \
|
||
GBoxedFreeFunc do_free_boxed; \
|
||
} __attribute__((__transparent_union__)) \
|
||
) = g_boxed_type_register_static; \
|
||
GType g_define_type_id = \
|
||
_g_register_boxed (g_intern_static_string (#TypeName), copy_func, free_func); \
|
||
{ /* custom code follows */
|
||
#else
|
||
#define _G_DEFINE_BOXED_TYPE_BEGIN(TypeName, type_name, copy_func, free_func) \
|
||
static GType type_name##_get_type_once (void); \
|
||
\
|
||
GType \
|
||
type_name##_get_type (void) \
|
||
{ \
|
||
static _g_type_once_init_type static_g_define_type_id = 0; \
|
||
if (_g_type_once_init_enter (&static_g_define_type_id)) \
|
||
{ \
|
||
GType g_define_type_id = type_name##_get_type_once (); \
|
||
_g_type_once_init_leave (&static_g_define_type_id, g_define_type_id); \
|
||
} \
|
||
return static_g_define_type_id; \
|
||
} \
|
||
\
|
||
G_NO_INLINE \
|
||
static GType \
|
||
type_name##_get_type_once (void) \
|
||
{ \
|
||
GType g_define_type_id = \
|
||
g_boxed_type_register_static (g_intern_static_string (#TypeName), \
|
||
(GBoxedCopyFunc) copy_func, \
|
||
(GBoxedFreeFunc) free_func); \
|
||
{ /* custom code follows */
|
||
#endif /* __GNUC__ */
|
||
|
||
/**
|
||
* G_DEFINE_POINTER_TYPE:
|
||
* @TypeName: The name of the new type, in Camel case
|
||
* @type_name: The name of the new type, in lowercase, with words
|
||
* separated by `_`
|
||
*
|
||
* A convenience macro for pointer type implementations, which defines a
|
||
* `type_name_get_type()` function registering the pointer type.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
#define G_DEFINE_POINTER_TYPE(TypeName, type_name) G_DEFINE_POINTER_TYPE_WITH_CODE (TypeName, type_name, {})
|
||
/**
|
||
* G_DEFINE_POINTER_TYPE_WITH_CODE:
|
||
* @TypeName: The name of the new type, in Camel case
|
||
* @type_name: The name of the new type, in lowercase, with words
|
||
* separated by `_`
|
||
* @_C_: Custom code that gets inserted in the `*_get_type()` function
|
||
*
|
||
* A convenience macro for pointer type implementations.
|
||
* Similar to G_DEFINE_POINTER_TYPE(), but allows to insert
|
||
* custom code into the `type_name_get_type()` function.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
#define G_DEFINE_POINTER_TYPE_WITH_CODE(TypeName, type_name, _C_) _G_DEFINE_POINTER_TYPE_BEGIN (TypeName, type_name) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
|
||
|
||
#define _G_DEFINE_POINTER_TYPE_BEGIN(TypeName, type_name) \
|
||
static GType type_name##_get_type_once (void); \
|
||
\
|
||
GType \
|
||
type_name##_get_type (void) \
|
||
{ \
|
||
static _g_type_once_init_type static_g_define_type_id = 0; \
|
||
if (_g_type_once_init_enter (&static_g_define_type_id)) \
|
||
{ \
|
||
GType g_define_type_id = type_name##_get_type_once (); \
|
||
_g_type_once_init_leave (&static_g_define_type_id, g_define_type_id); \
|
||
} \
|
||
return static_g_define_type_id; \
|
||
} \
|
||
\
|
||
G_NO_INLINE \
|
||
static GType \
|
||
type_name##_get_type_once (void) \
|
||
{ \
|
||
GType g_define_type_id = \
|
||
g_pointer_type_register_static (g_intern_static_string (#TypeName)); \
|
||
{ /* custom code follows */
|
||
|
||
/* --- protected (for fundamental type implementations) --- */
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GTypePlugin* g_type_get_plugin (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GTypePlugin* g_type_interface_get_plugin (GType instance_type,
|
||
GType interface_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_fundamental_next (void);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GType g_type_fundamental (GType type_id);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GTypeInstance* g_type_create_instance (GType type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_free_instance (GTypeInstance *instance);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_add_class_cache_func (gpointer cache_data,
|
||
GTypeClassCacheFunc cache_func);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_remove_class_cache_func (gpointer cache_data,
|
||
GTypeClassCacheFunc cache_func);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_class_unref_uncached (gpointer g_class);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_add_interface_check (gpointer check_data,
|
||
GTypeInterfaceCheckFunc check_func);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
void g_type_remove_interface_check (gpointer check_data,
|
||
GTypeInterfaceCheckFunc check_func);
|
||
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GTypeValueTable* g_type_value_table_peek (GType type);
|
||
|
||
|
||
/*< private >*/
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_check_instance (GTypeInstance *instance) G_GNUC_PURE;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GTypeInstance* g_type_check_instance_cast (GTypeInstance *instance,
|
||
GType iface_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_check_instance_is_a (GTypeInstance *instance,
|
||
GType iface_type) G_GNUC_PURE;
|
||
GOBJECT_AVAILABLE_IN_2_42
|
||
gboolean g_type_check_instance_is_fundamentally_a (GTypeInstance *instance,
|
||
GType fundamental_type) G_GNUC_PURE;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
GTypeClass* g_type_check_class_cast (GTypeClass *g_class,
|
||
GType is_a_type);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_check_class_is_a (GTypeClass *g_class,
|
||
GType is_a_type) G_GNUC_PURE;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_check_is_value_type (GType type) G_GNUC_CONST;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_check_value (const GValue *value) G_GNUC_PURE;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_check_value_holds (const GValue *value,
|
||
GType type) G_GNUC_PURE;
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
gboolean g_type_test_flags (GType type,
|
||
guint flags) G_GNUC_CONST;
|
||
|
||
|
||
/* --- debugging functions --- */
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
const gchar * g_type_name_from_instance (GTypeInstance *instance);
|
||
GOBJECT_AVAILABLE_IN_ALL
|
||
const gchar * g_type_name_from_class (GTypeClass *g_class);
|
||
|
||
|
||
/* --- implementation bits --- */
|
||
#if defined(G_DISABLE_CAST_CHECKS) || defined(__OPTIMIZE__)
|
||
# define _G_TYPE_CIC(ip, gt, ct) ((ct*) (void *) ip)
|
||
# define _G_TYPE_CCC(cp, gt, ct) ((ct*) (void *) cp)
|
||
#else
|
||
# define _G_TYPE_CIC(ip, gt, ct) \
|
||
((ct*) (void *) g_type_check_instance_cast ((GTypeInstance*) ip, gt))
|
||
# define _G_TYPE_CCC(cp, gt, ct) \
|
||
((ct*) (void *) g_type_check_class_cast ((GTypeClass*) cp, gt))
|
||
#endif
|
||
|
||
#define _G_TYPE_CHI(ip) (g_type_check_instance ((GTypeInstance*) ip))
|
||
#define _G_TYPE_CHV(vl) (g_type_check_value ((GValue*) vl))
|
||
#define _G_TYPE_IGC(ip, gt, ct) ((ct*) (((GTypeInstance*) ip)->g_class))
|
||
#define _G_TYPE_IGI(ip, gt, ct) ((ct*) g_type_interface_peek (((GTypeInstance*) ip)->g_class, gt))
|
||
#define _G_TYPE_CIFT(ip, ft) (g_type_check_instance_is_fundamentally_a ((GTypeInstance*) ip, ft))
|
||
#ifdef __GNUC__
|
||
# define _G_TYPE_CIT(ip, gt) (G_GNUC_EXTENSION ({ \
|
||
GTypeInstance *__inst = (GTypeInstance*) ip; GType __t = gt; gboolean __r; \
|
||
if (!__inst) \
|
||
__r = FALSE; \
|
||
else if (__inst->g_class && __inst->g_class->g_type == __t) \
|
||
__r = TRUE; \
|
||
else \
|
||
__r = g_type_check_instance_is_a (__inst, __t); \
|
||
__r; \
|
||
}))
|
||
# define _G_TYPE_CCT(cp, gt) (G_GNUC_EXTENSION ({ \
|
||
GTypeClass *__class = (GTypeClass*) cp; GType __t = gt; gboolean __r; \
|
||
if (!__class) \
|
||
__r = FALSE; \
|
||
else if (__class->g_type == __t) \
|
||
__r = TRUE; \
|
||
else \
|
||
__r = g_type_check_class_is_a (__class, __t); \
|
||
__r; \
|
||
}))
|
||
# define _G_TYPE_CVH(vl, gt) (G_GNUC_EXTENSION ({ \
|
||
const GValue *__val = (const GValue*) vl; GType __t = gt; gboolean __r; \
|
||
if (!__val) \
|
||
__r = FALSE; \
|
||
else if (__val->g_type == __t) \
|
||
__r = TRUE; \
|
||
else \
|
||
__r = g_type_check_value_holds (__val, __t); \
|
||
__r; \
|
||
}))
|
||
#else /* !__GNUC__ */
|
||
# define _G_TYPE_CIT(ip, gt) (g_type_check_instance_is_a ((GTypeInstance*) ip, gt))
|
||
# define _G_TYPE_CCT(cp, gt) (g_type_check_class_is_a ((GTypeClass*) cp, gt))
|
||
# define _G_TYPE_CVH(vl, gt) (g_type_check_value_holds ((const GValue*) vl, gt))
|
||
#endif /* !__GNUC__ */
|
||
/**
|
||
* G_TYPE_FLAG_RESERVED_ID_BIT:
|
||
*
|
||
* A bit in the type number that's supposed to be left untouched.
|
||
*/
|
||
#define G_TYPE_FLAG_RESERVED_ID_BIT ((GType) (1 << 0))
|
||
|
||
/**
|
||
* GPOINTER_TO_TYPE:
|
||
* @p: The pointer to convert to a #GType
|
||
*
|
||
* This macro should be used instead of GPOINTER_TO_SIZE() to ensure
|
||
* portability since #GType is not guaranteed to be the same as #gsize.
|
||
*
|
||
* Since: 2.80
|
||
*/
|
||
#define GPOINTER_TO_TYPE(p) ((GType) (guintptr) (p)) GOBJECT_AVAILABLE_MACRO_IN_2_80
|
||
/**
|
||
* GTYPE_TO_POINTER:
|
||
* @t: The #GType to convert to a pointer
|
||
*
|
||
* This macro should be used instead of GSIZE_TO_POINTER() to ensure
|
||
* portability since #GType is not guaranteed to be the same as #gsize.
|
||
*
|
||
* Since: 2.80
|
||
*/
|
||
#define GTYPE_TO_POINTER(t) ((gpointer) (guintptr) (t)) GOBJECT_AVAILABLE_MACRO_IN_2_80
|
||
|
||
G_END_DECLS
|
||
|
||
#endif /* __G_TYPE_H__ */
|