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glib/gobject/gtype.h
Ville Skyttä b20647c2e2 docs: spelling and grammar fixes 
Signed-off-by: Ville Skyttä <ville.skytta@iki.fi>
2024-04-01 11:01:06 +00:00

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