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4708b8ecc3
Make G_TYPE_VARIANT a fundamental type instead of boxed, and add
g_variant_{set,get,dup}_variant.
Add GParamSpecVariant.
Bug #610863.
1620 lines
60 KiB
C
1620 lines
60 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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* 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 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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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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#ifndef __G_TYPE_H__
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#define __G_TYPE_H__
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#include <glib.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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* 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_MAX:
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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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* introduced by g_type_init().
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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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* <literal>void</literal> 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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* 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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* 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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* Send email to gtk-devel-list@gnome.org for reservations.
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*/
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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_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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* 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 on success.
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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 on success.
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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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* 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 on success.
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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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* Returns: %TRUE on success.
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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 on success.
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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 on success.
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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 on success.
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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 can not 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 on success.
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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 on success.
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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 on success.
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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 on success.
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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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/* Typedefs
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*/
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/**
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* GType:
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*
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* A numerical value which represents the unique identifier of a registered
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* type.
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*/
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#if GLIB_SIZEOF_SIZE_T != GLIB_SIZEOF_LONG || !defined __cplusplus
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typedef gsize GType;
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#else /* for historic reasons, C++ links against gulong GTypes */
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typedef gulong GType;
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#endif
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typedef struct _GValue GValue;
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typedef union _GTypeCValue GTypeCValue;
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typedef struct _GTypePlugin GTypePlugin;
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typedef struct _GTypeClass GTypeClass;
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typedef struct _GTypeInterface GTypeInterface;
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typedef struct _GTypeInstance GTypeInstance;
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typedef struct _GTypeInfo GTypeInfo;
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typedef struct _GTypeFundamentalInfo GTypeFundamentalInfo;
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typedef struct _GInterfaceInfo GInterfaceInfo;
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typedef struct _GTypeValueTable GTypeValueTable;
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typedef struct _GTypeQuery GTypeQuery;
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/* Basic Type Structures
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*/
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/**
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* GTypeClass:
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*
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* An opaque structure used as the base of all classes.
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*/
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struct _GTypeClass
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{
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/*< private >*/
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GType g_type;
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};
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/**
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* GTypeInstance:
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*
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* An opaque structure used as the base of all type instances.
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*/
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struct _GTypeInstance
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{
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/*< private >*/
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GTypeClass *g_class;
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};
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/**
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* GTypeInterface:
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*
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* An opaque structure used as the base of all interface types.
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*/
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struct _GTypeInterface
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{
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/*< private >*/
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GType g_type; /* iface type */
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GType g_instance_type;
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};
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/**
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* GTypeQuery:
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* @type: the #GType value of the type.
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* @type_name: the name of the type.
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* @class_size: the size of the class structure.
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* @instance_size: the size of the instance structure.
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*
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* A structure holding information for a specific type. It is
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* filled in by the g_type_query() function.
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*/
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struct _GTypeQuery
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{
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GType type;
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const gchar *type_name;
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guint class_size;
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guint instance_size;
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};
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/* Casts, checks and accessors for structured types
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* usage of these macros is reserved to type implementations only
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*/
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/*< protected >*/
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/**
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* G_TYPE_CHECK_INSTANCE:
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* @instance: Location of a #GTypeInstance structure.
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*
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* Checks if @instance is a valid #GTypeInstance structure,
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* otherwise issues a warning and returns %FALSE.
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*
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* This macro should only be used in type implementations.
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*
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* Returns: %TRUE on success.
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*/
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#define G_TYPE_CHECK_INSTANCE(instance) (_G_TYPE_CHI ((GTypeInstance*) (instance)))
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/**
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* G_TYPE_CHECK_INSTANCE_CAST:
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* @instance: Location of a #GTypeInstance structure.
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* @g_type: The type to be returned.
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* @c_type: The corresponding C type of @g_type.
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*
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* Checks that @instance is an instance of the type identified by @g_type
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* and issues a warning if this is not the case. Returns @instance casted
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* to a pointer to @c_type.
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*
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* This macro should only be used in type implementations.
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*/
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#define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type) (_G_TYPE_CIC ((instance), (g_type), c_type))
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/**
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* G_TYPE_CHECK_INSTANCE_TYPE:
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* @instance: Location of a #GTypeInstance structure.
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* @g_type: The type to be checked
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*
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* Checks if @instance is an instance of the type identified by @g_type.
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*
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* This macro should only be used in type implementations.
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*
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* Returns: %TRUE on success.
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*/
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#define G_TYPE_CHECK_INSTANCE_TYPE(instance, g_type) (_G_TYPE_CIT ((instance), (g_type)))
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/**
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* G_TYPE_INSTANCE_GET_CLASS:
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* @instance: Location of the #GTypeInstance structure.
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* @g_type: The #GType of the class to be returned.
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* @c_type: The C type of the class structure.
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*
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* Get the class structure of a given @instance, casted
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* to a specified ancestor type @g_type of the instance.
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*
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* Note that while calling a GInstanceInitFunc(), the class pointer gets
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* modified, so it might not always return the expected pointer.
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*
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* This macro should only be used in type implementations.
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*
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* Returns: a pointer to the class structure
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*/
|
|
#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.
|
|
*
|
|
* 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: 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.
|
|
*
|
|
* This macro should only be used in type implementations.
|
|
*
|
|
* Returns: %TRUE on success.
|
|
*/
|
|
#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 on success.
|
|
*/
|
|
#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 on success.
|
|
*/
|
|
#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
|
|
* Returns: 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)))
|
|
|
|
/**
|
|
* 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: 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.
|
|
*
|
|
* The <type>GTypeDebugFlags</type> enumeration values can be passed to
|
|
* g_type_init_with_debug_flags() to trigger debugging messages during runtime.
|
|
* Note that the messages can also be triggered by setting the
|
|
* <envar>GOBJECT_DEBUG</envar> environment variable to a ':'-separated list of
|
|
* "objects" and "signals".
|
|
*/
|
|
typedef enum /*< skip >*/
|
|
{
|
|
G_TYPE_DEBUG_NONE = 0,
|
|
G_TYPE_DEBUG_OBJECTS = 1 << 0,
|
|
G_TYPE_DEBUG_SIGNALS = 1 << 1,
|
|
G_TYPE_DEBUG_MASK = 0x03
|
|
} GTypeDebugFlags;
|
|
|
|
|
|
/* --- prototypes --- */
|
|
void g_type_init (void);
|
|
void g_type_init_with_debug_flags (GTypeDebugFlags debug_flags);
|
|
G_CONST_RETURN gchar* g_type_name (GType type);
|
|
GQuark g_type_qname (GType type);
|
|
GType g_type_from_name (const gchar *name);
|
|
GType g_type_parent (GType type);
|
|
guint g_type_depth (GType type);
|
|
GType g_type_next_base (GType leaf_type,
|
|
GType root_type);
|
|
gboolean g_type_is_a (GType type,
|
|
GType is_a_type);
|
|
gpointer g_type_class_ref (GType type);
|
|
gpointer g_type_class_peek (GType type);
|
|
gpointer g_type_class_peek_static (GType type);
|
|
void g_type_class_unref (gpointer g_class);
|
|
gpointer g_type_class_peek_parent (gpointer g_class);
|
|
gpointer g_type_interface_peek (gpointer instance_class,
|
|
GType iface_type);
|
|
gpointer g_type_interface_peek_parent (gpointer g_iface);
|
|
|
|
gpointer g_type_default_interface_ref (GType g_type);
|
|
gpointer g_type_default_interface_peek (GType g_type);
|
|
void g_type_default_interface_unref (gpointer g_iface);
|
|
|
|
/* g_free() the returned arrays */
|
|
GType* g_type_children (GType type,
|
|
guint *n_children);
|
|
GType* g_type_interfaces (GType type,
|
|
guint *n_interfaces);
|
|
|
|
/* per-type _static_ data */
|
|
void g_type_set_qdata (GType type,
|
|
GQuark quark,
|
|
gpointer data);
|
|
gpointer g_type_get_qdata (GType type,
|
|
GQuark quark);
|
|
void g_type_query (GType type,
|
|
GTypeQuery *query);
|
|
|
|
|
|
/* --- type registration --- */
|
|
/**
|
|
* GBaseInitFunc:
|
|
* @g_class: The #GTypeClass structure to initialize.
|
|
*
|
|
* A callback function used by the type system to do base initialization
|
|
* of the class structures of derived types. It 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
|
|
* intialization process.
|
|
*/
|
|
typedef void (*GBaseInitFunc) (gpointer g_class);
|
|
/**
|
|
* GBaseFinalizeFunc:
|
|
* @g_class: 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 intialization is performed.
|
|
* See GClassInitFunc() for a discussion of the class intialization process.
|
|
*/
|
|
typedef void (*GBaseFinalizeFunc) (gpointer g_class);
|
|
/**
|
|
* GClassInitFunc:
|
|
* @g_class: 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:
|
|
* <itemizedlist>
|
|
* <listitem><para>
|
|
* 1 - Copying common members from the parent class over to the
|
|
* derived class structure.
|
|
* </para></listitem>
|
|
* <listitem><para>
|
|
* 2 - Zero initialization of the remaining members not copied
|
|
* over from the parent class.
|
|
* </para></listitem>
|
|
* <listitem><para>
|
|
* 3 - Invocation of the GBaseInitFunc() initializers of all parent
|
|
* types and the class' type.
|
|
* </para></listitem>
|
|
* <listitem><para>
|
|
* 4 - Invocation of the class' GClassInitFunc() initializer.
|
|
* </para></listitem>
|
|
* </itemizedlist>
|
|
* 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:
|
|
*
|
|
* |[
|
|
* 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: 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: 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.
|
|
*/
|
|
typedef void (*GInstanceInitFunc) (GTypeInstance *instance,
|
|
gpointer g_class);
|
|
/**
|
|
* GInterfaceInitFunc:
|
|
* @g_iface: 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.
|
|
*/
|
|
typedef void (*GInterfaceInitFunc) (gpointer g_iface,
|
|
gpointer iface_data);
|
|
/**
|
|
* GInterfaceFinalizeFunc:
|
|
* @g_iface: 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: 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 #GTypeClassCacheFunc<!-- -->s 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: 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 instantiable 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 >*/
|
|
{
|
|
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_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().
|
|
*
|
|
* Bit masks used to check or determine characteristics of a type.
|
|
*/
|
|
typedef enum /*< skip >*/
|
|
{
|
|
G_TYPE_FLAG_ABSTRACT = (1 << 4),
|
|
G_TYPE_FLAG_VALUE_ABSTRACT = (1 << 5)
|
|
} 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 fo 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, it is ignored, since instances are allocated with the <link linkend="glib-Memory-Slices">slice allocator</link> now.
|
|
* @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;
|
|
};
|
|
/**
|
|
* GTypeValueTable:
|
|
* @value_init: Default initialize @values contents by poking values
|
|
* directly into the value->data array. The data array of
|
|
* the #GValue passed into this function was zero-filled
|
|
* with <function>memset()</function>, so no care has to
|
|
* be taken to free any
|
|
* old contents. E.g. for the implementation of a string
|
|
* value that may never be %NULL, the implementation might
|
|
* look like:
|
|
* |[
|
|
* value->data[0].v_pointer = g_strdup ("");
|
|
* ]|
|
|
* @value_free: Free any old contents that might be left in the
|
|
* data array of the passed in @value. No resources may
|
|
* remain allocated through the #GValue contents after
|
|
* this function returns. E.g. for our above string type:
|
|
* |[
|
|
* // 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);
|
|
* ]|
|
|
* @value_copy: @dest_value is a #GValue with zero-filled data section
|
|
* and @src_value is a properly setup #GValue of same 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:
|
|
* |[
|
|
* dest_value->data[0].v_pointer = g_strdup (src_value->data[0].v_pointer);
|
|
* ]|
|
|
* @value_peek_pointer: 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:
|
|
* |[
|
|
* return value->data[0].v_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:
|
|
* <variablelist>
|
|
* <varlistentry><term /><listitem><para>
|
|
* 'i' - Integers. passed as collect_values[].v_int.
|
|
* </para></listitem></varlistentry>
|
|
* <varlistentry><term /><listitem><para>
|
|
* 'l' - Longs. passed as collect_values[].v_long.
|
|
* </para></listitem></varlistentry>
|
|
* <varlistentry><term /><listitem><para>
|
|
* 'd' - Doubles. passed as collect_values[].v_double.
|
|
* </para></listitem></varlistentry>
|
|
* <varlistentry><term /><listitem><para>
|
|
* 'p' - Pointers. passed as collect_values[].v_pointer.
|
|
* </para></listitem></varlistentry>
|
|
* </variablelist>
|
|
* 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: The collect_value() function is responsible for converting the
|
|
* values collected from a variable argument list into contents
|
|
* suitable for storage in a GValue. This function should setup
|
|
* @value similar to value_init(); e.g. for a string value that
|
|
* does not allow %NULL pointers, it needs to either spew 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 value_init() it is guaranteed to not
|
|
* contain any old contents that might need freeing.
|
|
* @n_collect_values is exactly the string length of @collect_format,
|
|
* and @collect_values is an array of unions #GTypeCValue with
|
|
* length @n_collect_values, containing the collected values
|
|
* according to @collect_format.
|
|
* @collect_flags is an 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:
|
|
* |[
|
|
* 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 #GSignal 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 collect_value() of #GObject:
|
|
* |[
|
|
* if (collect_values[0].v_pointer)
|
|
* {
|
|
* GObject *object = G_OBJECT (collect_values[0].v_pointer);
|
|
* // never honour G_VALUE_NOCOPY_CONTENTS for ref-counted types
|
|
* value->data[0].v_pointer = g_object_ref (object);
|
|
* return NULL;
|
|
* }
|
|
* else
|
|
* return g_strdup_printf ("Object passed as invalid NULL pointer");
|
|
* }
|
|
* ]|
|
|
* 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() may spew an
|
|
* error by returning a newly allocated non-%NULL string, giving
|
|
* a suitable description of the error condition.
|
|
* 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 condition so further
|
|
* program behaviour is undefined.
|
|
* @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: This function is responsible for storing the @value contents into
|
|
* arguments passed through a variable argument list which got
|
|
* collected into @collect_values according to @lcopy_format.
|
|
* @n_collect_values equals the string length of @lcopy_format,
|
|
* and @collect_flags may contain %G_VALUE_NOCOPY_CONTENTS.
|
|
* In contrast to collect_value(), lcopy_value() is obliged to
|
|
* always properly support %G_VALUE_NOCOPY_CONTENTS.
|
|
* Similar to collect_value() the function may prematurely abort
|
|
* by returning a newly allocated string describing an error condition.
|
|
* To complete the string example:
|
|
* |[
|
|
* gchar **string_p = collect_values[0].v_pointer;
|
|
* if (!string_p)
|
|
* return g_strdup_printf ("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 lcopy_value() for
|
|
* reference-counted types:
|
|
* |[
|
|
* GObject **object_p = collect_values[0].v_pointer;
|
|
* if (!object_p)
|
|
* return g_strdup_printf ("object location passed as NULL");
|
|
* if (!value->data[0].v_pointer)
|
|
* *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;
|
|
* ]|
|
|
*
|
|
* The #GTypeValueTable provides the functions required by the #GValue implementation,
|
|
* to serve as a container for values of a type.
|
|
*/
|
|
|
|
struct _GTypeValueTable
|
|
{
|
|
void (*value_init) (GValue *value);
|
|
void (*value_free) (GValue *value);
|
|
void (*value_copy) (const GValue *src_value,
|
|
GValue *dest_value);
|
|
/* varargs functionality (optional) */
|
|
gpointer (*value_peek_pointer) (const GValue *value);
|
|
gchar *collect_format;
|
|
gchar* (*collect_value) (GValue *value,
|
|
guint n_collect_values,
|
|
GTypeCValue *collect_values,
|
|
guint collect_flags);
|
|
gchar *lcopy_format;
|
|
gchar* (*lcopy_value) (const GValue *value,
|
|
guint n_collect_values,
|
|
GTypeCValue *collect_values,
|
|
guint collect_flags);
|
|
};
|
|
GType g_type_register_static (GType parent_type,
|
|
const gchar *type_name,
|
|
const GTypeInfo *info,
|
|
GTypeFlags flags);
|
|
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);
|
|
|
|
GType g_type_register_dynamic (GType parent_type,
|
|
const gchar *type_name,
|
|
GTypePlugin *plugin,
|
|
GTypeFlags flags);
|
|
GType g_type_register_fundamental (GType type_id,
|
|
const gchar *type_name,
|
|
const GTypeInfo *info,
|
|
const GTypeFundamentalInfo *finfo,
|
|
GTypeFlags flags);
|
|
void g_type_add_interface_static (GType instance_type,
|
|
GType interface_type,
|
|
const GInterfaceInfo *info);
|
|
void g_type_add_interface_dynamic (GType instance_type,
|
|
GType interface_type,
|
|
GTypePlugin *plugin);
|
|
void g_type_interface_add_prerequisite (GType interface_type,
|
|
GType prerequisite_type);
|
|
GType*g_type_interface_prerequisites (GType interface_type,
|
|
guint *n_prerequisites);
|
|
void g_type_class_add_private (gpointer g_class,
|
|
gsize private_size);
|
|
gpointer g_type_instance_get_private (GTypeInstance *instance,
|
|
GType private_type);
|
|
|
|
void g_type_add_class_private (GType class_type,
|
|
gsize private_size);
|
|
gpointer g_type_class_get_private (GTypeClass *klass,
|
|
GType private_type);
|
|
|
|
|
|
/* --- GType boilerplate --- */
|
|
/**
|
|
* 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_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_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.
|
|
*
|
|
* |[
|
|
* G_DEFINE_TYPE_EXTENDED (GtkGadget,
|
|
* gtk_gadget,
|
|
* GTK_TYPE_WIDGET,
|
|
* 0,
|
|
* G_IMPLEMENT_INTERFACE (TYPE_GIZMO,
|
|
* gtk_gadget_gizmo_init));
|
|
* ]|
|
|
* expands to
|
|
* |[
|
|
* static void gtk_gadget_init (GtkGadget *self);
|
|
* static void gtk_gadget_class_init (GtkGadgetClass *klass);
|
|
* static gpointer gtk_gadget_parent_class = NULL;
|
|
* static void gtk_gadget_class_intern_init (gpointer klass)
|
|
* {
|
|
* gtk_gadget_parent_class = g_type_class_peek_parent (klass);
|
|
* gtk_gadget_class_init ((GtkGadgetClass*) klass);
|
|
* }
|
|
*
|
|
* GType
|
|
* gtk_gadget_get_type (void)
|
|
* {
|
|
* static volatile gsize g_define_type_id__volatile = 0;
|
|
* if (g_once_init_enter (&g_define_type_id__volatile))
|
|
* {
|
|
* 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,
|
|
* (GTypeFlags) flags);
|
|
* {
|
|
* static 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 (&g_define_type_id__volatile, g_define_type_id);
|
|
* }
|
|
* return g_define_type_id__volatile;
|
|
* }
|
|
* ]|
|
|
* 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()
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/**
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* G_DEFINE_INTERFACE:
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* @TN: The name of the new type, in Camel case.
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* @t_n: The name of the new type, in lowercase, with words separated by '_'.
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* @T_P: The #GType of the prerequisite type for the interface, or 0
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* (%G_TYPE_INVALID) for no prerequisite type.
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*
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* A convenience macro for #GTypeInterface definitions, which declares
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* a default vtable initialization function and defines a *_get_type()
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* function.
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*
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* The macro expects the interface initialization function to have the
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* name <literal>t_n ## _default_init</literal>, and the interface
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* structure to have the name <literal>TN ## Interface</literal>.
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*
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* Since: 2.24
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*/
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#define G_DEFINE_INTERFACE(TN, t_n, T_P) G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, ;)
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/**
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* G_DEFINE_INTERFACE_WITH_CODE:
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* @TN: The name of the new type, in Camel case.
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* @t_n: The name of the new type, in lowercase, with words separated by '_'.
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* @T_P: The #GType of the prerequisite type for the interface, or 0
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* (%G_TYPE_INVALID) for no prerequisite type.
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* @_C_: Custom code that gets inserted in the *_get_type() function.
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*
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* A convenience macro for #GTypeInterface definitions. Similar to
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* G_DEFINE_INTERFACE(), but allows you to insert custom code into the
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* *_get_type() function, e.g. additional interface implementations
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* via G_IMPLEMENT_INTERFACE(), or additional prerequisite types. See
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* G_DEFINE_TYPE_EXTENDED() for a similar example using
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* G_DEFINE_TYPE_WITH_CODE().
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*
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* Since: 2.24
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*/
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#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()
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/**
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* G_IMPLEMENT_INTERFACE:
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* @TYPE_IFACE: The #GType of the interface to add
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* @iface_init: The interface init function
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*
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* A convenience macro to ease interface addition in the @_C_ section
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* of G_DEFINE_TYPE_WITH_CODE() or G_DEFINE_ABSTRACT_TYPE_WITH_CODE().
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* See G_DEFINE_TYPE_EXTENDED() for an example.
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*
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* Note that this macro can only be used together with the G_DEFINE_TYPE_*
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* macros, since it depends on variable names from those macros.
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*
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* Since: 2.4
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*/
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#define G_IMPLEMENT_INTERFACE(TYPE_IFACE, iface_init) { \
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const GInterfaceInfo g_implement_interface_info = { \
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(GInterfaceInitFunc) iface_init, NULL, NULL \
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}; \
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g_type_add_interface_static (g_define_type_id, TYPE_IFACE, &g_implement_interface_info); \
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}
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#define _G_DEFINE_TYPE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PARENT, flags) \
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\
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static void type_name##_init (TypeName *self); \
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static void type_name##_class_init (TypeName##Class *klass); \
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static gpointer type_name##_parent_class = NULL; \
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static void type_name##_class_intern_init (gpointer klass) \
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{ \
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type_name##_parent_class = g_type_class_peek_parent (klass); \
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type_name##_class_init ((TypeName##Class*) klass); \
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} \
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\
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GType \
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type_name##_get_type (void) \
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{ \
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static volatile gsize g_define_type_id__volatile = 0; \
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if (g_once_init_enter (&g_define_type_id__volatile)) \
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{ \
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GType g_define_type_id = \
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g_type_register_static_simple (TYPE_PARENT, \
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g_intern_static_string (#TypeName), \
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sizeof (TypeName##Class), \
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(GClassInitFunc) type_name##_class_intern_init, \
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sizeof (TypeName), \
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(GInstanceInitFunc) type_name##_init, \
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(GTypeFlags) flags); \
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{ /* custom code follows */
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#define _G_DEFINE_TYPE_EXTENDED_END() \
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/* following custom code */ \
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} \
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g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
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} \
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return g_define_type_id__volatile; \
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} /* closes type_name##_get_type() */
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|
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#define _G_DEFINE_INTERFACE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PREREQ) \
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\
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static void type_name##_default_init (TypeName##Interface *klass); \
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\
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GType \
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type_name##_get_type (void) \
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{ \
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static volatile gsize g_define_type_id__volatile = 0; \
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if (g_once_init_enter (&g_define_type_id__volatile)) \
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{ \
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GType g_define_type_id = \
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g_type_register_static_simple (G_TYPE_INTERFACE, \
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|
g_intern_static_string (#TypeName), \
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sizeof (TypeName##Interface), \
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(GClassInitFunc)type_name##_default_init, \
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0, \
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(GInstanceInitFunc)NULL, \
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(GTypeFlags) 0); \
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if (TYPE_PREREQ) \
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g_type_interface_add_prerequisite (g_define_type_id, TYPE_PREREQ); \
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{ /* custom code follows */
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#define _G_DEFINE_INTERFACE_EXTENDED_END() \
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/* following custom code */ \
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} \
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g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
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} \
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return g_define_type_id__volatile; \
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} /* closes type_name##_get_type() */
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|
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/* --- protected (for fundamental type implementations) --- */
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GTypePlugin* g_type_get_plugin (GType type);
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GTypePlugin* g_type_interface_get_plugin (GType instance_type,
|
|
GType interface_type);
|
|
GType g_type_fundamental_next (void);
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|
GType g_type_fundamental (GType type_id);
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GTypeInstance* g_type_create_instance (GType type);
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void g_type_free_instance (GTypeInstance *instance);
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void g_type_add_class_cache_func (gpointer cache_data,
|
|
GTypeClassCacheFunc cache_func);
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void g_type_remove_class_cache_func (gpointer cache_data,
|
|
GTypeClassCacheFunc cache_func);
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void g_type_class_unref_uncached (gpointer g_class);
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|
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void g_type_add_interface_check (gpointer check_data,
|
|
GTypeInterfaceCheckFunc check_func);
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|
void g_type_remove_interface_check (gpointer check_data,
|
|
GTypeInterfaceCheckFunc check_func);
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|
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GTypeValueTable* g_type_value_table_peek (GType type);
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|
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/*< private >*/
|
|
gboolean g_type_check_instance (GTypeInstance *instance) G_GNUC_PURE;
|
|
GTypeInstance* g_type_check_instance_cast (GTypeInstance *instance,
|
|
GType iface_type);
|
|
gboolean g_type_check_instance_is_a (GTypeInstance *instance,
|
|
GType iface_type) G_GNUC_PURE;
|
|
GTypeClass* g_type_check_class_cast (GTypeClass *g_class,
|
|
GType is_a_type);
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|
gboolean g_type_check_class_is_a (GTypeClass *g_class,
|
|
GType is_a_type) G_GNUC_PURE;
|
|
gboolean g_type_check_is_value_type (GType type) G_GNUC_CONST;
|
|
gboolean g_type_check_value (GValue *value) G_GNUC_PURE;
|
|
gboolean g_type_check_value_holds (GValue *value,
|
|
GType type) G_GNUC_PURE;
|
|
gboolean g_type_test_flags (GType type,
|
|
guint flags) G_GNUC_CONST;
|
|
|
|
|
|
/* --- debugging functions --- */
|
|
G_CONST_RETURN gchar* g_type_name_from_instance (GTypeInstance *instance);
|
|
G_CONST_RETURN gchar* g_type_name_from_class (GTypeClass *g_class);
|
|
|
|
|
|
/* --- internal functions --- */
|
|
G_GNUC_INTERNAL void g_value_c_init (void); /* sync with gvalue.c */
|
|
G_GNUC_INTERNAL void g_value_types_init (void); /* sync with gvaluetypes.c */
|
|
G_GNUC_INTERNAL void g_enum_types_init (void); /* sync with genums.c */
|
|
G_GNUC_INTERNAL void g_param_type_init (void); /* sync with gparam.c */
|
|
G_GNUC_INTERNAL void g_boxed_type_init (void); /* sync with gboxed.c */
|
|
G_GNUC_INTERNAL void g_object_type_init (void); /* sync with gobject.c */
|
|
G_GNUC_INTERNAL void g_param_spec_types_init (void); /* sync with gparamspecs.c */
|
|
G_GNUC_INTERNAL void g_value_transforms_init (void); /* sync with gvaluetransform.c */
|
|
G_GNUC_INTERNAL void g_signal_init (void); /* sync with gsignal.c */
|
|
|
|
|
|
/* --- implementation bits --- */
|
|
#ifndef G_DISABLE_CAST_CHECKS
|
|
# define _G_TYPE_CIC(ip, gt, ct) \
|
|
((ct*) g_type_check_instance_cast ((GTypeInstance*) ip, gt))
|
|
# define _G_TYPE_CCC(cp, gt, ct) \
|
|
((ct*) g_type_check_class_cast ((GTypeClass*) cp, gt))
|
|
#else /* G_DISABLE_CAST_CHECKS */
|
|
# define _G_TYPE_CIC(ip, gt, ct) ((ct*) ip)
|
|
# define _G_TYPE_CCC(cp, gt, ct) ((ct*) cp)
|
|
#endif /* G_DISABLE_CAST_CHECKS */
|
|
#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))
|
|
#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 ({ \
|
|
GValue *__val = (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 ((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))
|
|
extern GTypeDebugFlags _g_type_debug_flags;
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __G_TYPE_H__ */
|