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glib/gobject/gtype.h
Tim Janik 999a87a19a provide a short-cut version for this macro in case 
Tue Feb  3 21:24:01 2004  Tim Janik  <timj@gtk.org>

        * gtype.h (_G_TYPE_CVH): provide a short-cut version for
        this macro in case value->g_type==checked_type for gcc, similar
        to instance and class check short-cuts. this speeds up code that
        makes frequent use of G_VALUE_HOLDS_*() (e.g. setters/getters).

        * gtype.c (type_data_last_unref_Wm): don't call class-cache functions
        for the uncached case, this rendered g_type_class_unref_uncached()
        useless. pointed out by Stefan Westerfeld.
2004-02-03 20:30:23 +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.
*
* 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
#error "Only <glib-object.h> can be included directly."
#endif
#ifndef __G_TYPE_H__
#define __G_TYPE_H__
#include <glib.h>
G_BEGIN_DECLS
/* Basic Type Macros
*/
#define G_TYPE_FUNDAMENTAL(type) (g_type_fundamental (type))
#define G_TYPE_FUNDAMENTAL_MAX (255 << G_TYPE_FUNDAMENTAL_SHIFT)
/* Constant fundamental types,
* introduced by g_type_init().
*/
#define G_TYPE_INVALID G_TYPE_MAKE_FUNDAMENTAL (0)
#define G_TYPE_NONE G_TYPE_MAKE_FUNDAMENTAL (1)
#define G_TYPE_INTERFACE G_TYPE_MAKE_FUNDAMENTAL (2)
#define G_TYPE_CHAR G_TYPE_MAKE_FUNDAMENTAL (3)
#define G_TYPE_UCHAR G_TYPE_MAKE_FUNDAMENTAL (4)
#define G_TYPE_BOOLEAN G_TYPE_MAKE_FUNDAMENTAL (5)
#define G_TYPE_INT G_TYPE_MAKE_FUNDAMENTAL (6)
#define G_TYPE_UINT G_TYPE_MAKE_FUNDAMENTAL (7)
#define G_TYPE_LONG G_TYPE_MAKE_FUNDAMENTAL (8)
#define G_TYPE_ULONG G_TYPE_MAKE_FUNDAMENTAL (9)
#define G_TYPE_INT64 G_TYPE_MAKE_FUNDAMENTAL (10)
#define G_TYPE_UINT64 G_TYPE_MAKE_FUNDAMENTAL (11)
#define G_TYPE_ENUM G_TYPE_MAKE_FUNDAMENTAL (12)
#define G_TYPE_FLAGS G_TYPE_MAKE_FUNDAMENTAL (13)
#define G_TYPE_FLOAT G_TYPE_MAKE_FUNDAMENTAL (14)
#define G_TYPE_DOUBLE G_TYPE_MAKE_FUNDAMENTAL (15)
#define G_TYPE_STRING G_TYPE_MAKE_FUNDAMENTAL (16)
#define G_TYPE_POINTER G_TYPE_MAKE_FUNDAMENTAL (17)
#define G_TYPE_BOXED G_TYPE_MAKE_FUNDAMENTAL (18)
#define G_TYPE_PARAM G_TYPE_MAKE_FUNDAMENTAL (19)
#define G_TYPE_OBJECT G_TYPE_MAKE_FUNDAMENTAL (20)
/* Reserved fundamental type numbers to create new fundamental
* type IDs with G_TYPE_MAKE_FUNDAMENTAL().
* Send email to gtk-devel-list@redhat.com for reservations.
*/
#define G_TYPE_FUNDAMENTAL_SHIFT (2)
#define G_TYPE_MAKE_FUNDAMENTAL(x) ((GType) ((x) << G_TYPE_FUNDAMENTAL_SHIFT))
#define G_TYPE_RESERVED_GLIB_FIRST (21)
#define G_TYPE_RESERVED_GLIB_LAST (31)
#define G_TYPE_RESERVED_BSE_FIRST (32)
#define G_TYPE_RESERVED_BSE_LAST (48)
#define G_TYPE_RESERVED_USER_FIRST (49)
/* Type Checking Macros
*/
#define G_TYPE_IS_FUNDAMENTAL(type) ((type) <= G_TYPE_FUNDAMENTAL_MAX)
#define G_TYPE_IS_DERIVED(type) ((type) > G_TYPE_FUNDAMENTAL_MAX)
#define G_TYPE_IS_INTERFACE(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_INTERFACE)
#define G_TYPE_IS_CLASSED(type) (g_type_test_flags ((type), G_TYPE_FLAG_CLASSED))
#define G_TYPE_IS_INSTANTIATABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_INSTANTIATABLE))
#define G_TYPE_IS_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DERIVABLE))
#define G_TYPE_IS_DEEP_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DEEP_DERIVABLE))
#define G_TYPE_IS_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_ABSTRACT))
#define G_TYPE_IS_VALUE_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_VALUE_ABSTRACT))
#define G_TYPE_IS_VALUE_TYPE(type) (g_type_check_is_value_type (type))
#define G_TYPE_HAS_VALUE_TABLE(type) (g_type_value_table_peek (type) != NULL)
/* Typedefs
*/
#if GLIB_SIZEOF_LONG == GLIB_SIZEOF_SIZE_T
typedef gulong GType;
#else /* hm, shouldn't happen? */
typedef gsize 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
*/
struct _GTypeClass
{
/*< private >*/
GType g_type;
};
struct _GTypeInstance
{
/*< private >*/
GTypeClass *g_class;
};
struct _GTypeInterface
{
/*< private >*/
GType g_type; /* iface type */
GType g_instance_type;
};
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 >*/
#define G_TYPE_CHECK_INSTANCE(instance) (_G_TYPE_CHI ((GTypeInstance*) (instance)))
#define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type) (_G_TYPE_CIC ((instance), (g_type), c_type))
#define G_TYPE_CHECK_INSTANCE_TYPE(instance, g_type) (_G_TYPE_CIT ((instance), (g_type)))
#define G_TYPE_INSTANCE_GET_CLASS(instance, g_type, c_type) (_G_TYPE_IGC ((instance), (g_type), c_type))
#define G_TYPE_INSTANCE_GET_INTERFACE(instance, g_type, c_type) (_G_TYPE_IGI ((instance), (g_type), c_type))
#define G_TYPE_CHECK_CLASS_CAST(g_class, g_type, c_type) (_G_TYPE_CCC ((g_class), (g_type), c_type))
#define G_TYPE_CHECK_CLASS_TYPE(g_class, g_type) (_G_TYPE_CCT ((g_class), (g_type)))
#define G_TYPE_CHECK_VALUE(value) (_G_TYPE_CHV ((value)))
#define G_TYPE_CHECK_VALUE_TYPE(value, g_type) (_G_TYPE_CVH ((value), (g_type)))
#define G_TYPE_FROM_INSTANCE(instance) (G_TYPE_FROM_CLASS (((GTypeInstance*) (instance))->g_class))
#define G_TYPE_FROM_CLASS(g_class) (((GTypeClass*) (g_class))->g_type)
#define G_TYPE_FROM_INTERFACE(g_iface) (((GTypeInterface*) (g_iface))->g_type)
#define G_TYPE_INSTANCE_GET_PRIVATE(instance, g_type, c_type) ((c_type*) g_type_instance_get_private ((GTypeInstance*) (instance), (g_type)))
/* debug flags for g_type_init_with_debug_flags() */
typedef enum /*< skip >*/
{
G_TYPE_DEBUG_NONE = 0,
G_TYPE_DEBUG_OBJECTS = 1 << 0,
G_TYPE_DEBUG_SIGNALS = 1 << 1,
G_TYPE_DEBUG_MASK = 0x03
} GTypeDebugFlags;
/* --- prototypes --- */
void g_type_init (void);
void g_type_init_with_debug_flags (GTypeDebugFlags debug_flags);
G_CONST_RETURN gchar* g_type_name (GType type);
GQuark g_type_qname (GType type);
GType g_type_from_name (const gchar *name);
GType g_type_parent (GType type);
guint g_type_depth (GType type);
GType g_type_next_base (GType leaf_type,
GType root_type);
gboolean g_type_is_a (GType type,
GType is_a_type);
gpointer g_type_class_ref (GType type);
gpointer g_type_class_peek (GType type);
gpointer g_type_class_peek_static (GType type);
void g_type_class_unref (gpointer g_class);
gpointer g_type_class_peek_parent (gpointer g_class);
gpointer g_type_interface_peek (gpointer instance_class,
GType iface_type);
gpointer g_type_interface_peek_parent (gpointer g_iface);
gpointer g_type_default_interface_ref (GType g_type);
gpointer g_type_default_interface_peek (GType g_type);
void g_type_default_interface_unref (gpointer g_iface);
/* g_free() the returned arrays */
GType* g_type_children (GType type,
guint *n_children);
GType* g_type_interfaces (GType type,
guint *n_interfaces);
/* per-type _static_ data */
void g_type_set_qdata (GType type,
GQuark quark,
gpointer data);
gpointer g_type_get_qdata (GType type,
GQuark quark);
void g_type_query (GType type,
GTypeQuery *query);
/* --- type registration --- */
typedef void (*GBaseInitFunc) (gpointer g_class);
typedef void (*GBaseFinalizeFunc) (gpointer g_class);
typedef void (*GClassInitFunc) (gpointer g_class,
gpointer class_data);
typedef void (*GClassFinalizeFunc) (gpointer g_class,
gpointer class_data);
typedef void (*GInstanceInitFunc) (GTypeInstance *instance,
gpointer g_class);
typedef void (*GInterfaceInitFunc) (gpointer g_iface,
gpointer iface_data);
typedef void (*GInterfaceFinalizeFunc) (gpointer g_iface,
gpointer iface_data);
typedef gboolean (*GTypeClassCacheFunc) (gpointer cache_data,
GTypeClass *g_class);
typedef void (*GTypeInterfaceCheckFunc) (gpointer func_data,
gpointer g_iface);
typedef enum /*< skip >*/
{
G_TYPE_FLAG_CLASSED = (1 << 0),
G_TYPE_FLAG_INSTANTIATABLE = (1 << 1),
G_TYPE_FLAG_DERIVABLE = (1 << 2),
G_TYPE_FLAG_DEEP_DERIVABLE = (1 << 3)
} GTypeFundamentalFlags;
typedef enum /*< skip >*/
{
G_TYPE_FLAG_ABSTRACT = (1 << 4),
G_TYPE_FLAG_VALUE_ABSTRACT = (1 << 5)
} GTypeFlags;
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;
};
struct _GTypeFundamentalInfo
{
GTypeFundamentalFlags type_flags;
};
struct _GInterfaceInfo
{
GInterfaceInitFunc interface_init;
GInterfaceFinalizeFunc interface_finalize;
gpointer interface_data;
};
struct _GTypeValueTable
{
void (*value_init) (GValue *value);
void (*value_free) (GValue *value);
void (*value_copy) (const GValue *src_value,
GValue *dest_value);
/* varargs functionality (optional) */
gpointer (*value_peek_pointer) (const GValue *value);
gchar *collect_format;
gchar* (*collect_value) (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
gchar *lcopy_format;
gchar* (*lcopy_value) (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
};
GType g_type_register_static (GType parent_type,
const gchar *type_name,
const GTypeInfo *info,
GTypeFlags flags);
GType g_type_register_dynamic (GType parent_type,
const gchar *type_name,
GTypePlugin *plugin,
GTypeFlags flags);
GType g_type_register_fundamental (GType type_id,
const gchar *type_name,
const GTypeInfo *info,
const GTypeFundamentalInfo *finfo,
GTypeFlags flags);
void g_type_add_interface_static (GType instance_type,
GType interface_type,
const GInterfaceInfo *info);
void g_type_add_interface_dynamic (GType instance_type,
GType interface_type,
GTypePlugin *plugin);
void g_type_interface_add_prerequisite (GType interface_type,
GType prerequisite_type);
GType*g_type_interface_prerequisites (GType interface_type,
guint *n_prerequisites);
void g_type_class_add_private (gpointer g_class,
gsize private_size);
gpointer g_type_instance_get_private (GTypeInstance *instance,
GType private_type);
/* --- GType boilerplate --- */
/* convenience macros for type implementations, which for a type GtkGadget will:
* - prototype: static void gtk_gadget_class_init (GtkGadgetClass *klass);
* - prototype: static void gtk_gadget_init (GtkGadget *self);
* - define: static gpointer gtk_gadget_parent_class = NULL;
* gtk_gadget_parent_class is initialized prior to calling gtk_gadget_class_init()
* - implement: GType gtk_gadget_get_type (void) { ... }
* - support custom code in gtk_gadget_get_type() after the type is registered.
*
* macro arguments: TypeName, type_name, TYPE_PARENT, CODE
* example: G_DEFINE_TYPE_WITH_CODE (GtkGadget, gtk_gadget, GTK_TYPE_WIDGET,
* g_print ("GtkGadget-id: %lu\n", g_define_type_id));
*/
#define G_DEFINE_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, {})
#define G_DEFINE_TYPE_WITH_CODE(TN, t_n, T_P, _C_) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, _C_)
#define G_DEFINE_ABSTRACT_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, {})
#define G_DEFINE_ABSTRACT_TYPE_WITH_CODE(TN, t_n, T_P, _C_) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, _C_)
/* convenience macro to ease interface addition in the CODE
* section of G_DEFINE_TYPE_WITH_CODE() (this macro relies on
* the g_define_type_id present within G_DEFINE_TYPE_WITH_CODE()).
* usage example:
* G_DEFINE_TYPE_WITH_CODE (GtkTreeStore, gtk_tree_store, G_TYPE_OBJECT,
* G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_MODEL,
* gtk_tree_store_tree_model_init));
*/
#define G_IMPLEMENT_INTERFACE(TYPE_IFACE, iface_init) { \
static const GInterfaceInfo g_implement_interface_info = { \
(GInterfaceInitFunc) iface_init \
}; \
g_type_add_interface_static (g_define_type_id, TYPE_IFACE, &g_implement_interface_info); \
}
#define G_DEFINE_TYPE_EXTENDED(TypeName, type_name, TYPE_PARENT, flags, CODE) \
\
static void type_name##_init (TypeName *self); \
static void type_name##_class_init (TypeName##Class *klass); \
static gpointer type_name##_parent_class = NULL; \
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); \
} \
\
GType \
type_name##_get_type (void) \
{ \
static GType g_define_type_id = 0; \
if (G_UNLIKELY (g_define_type_id == 0)) \
{ \
static const GTypeInfo g_define_type_info = { \
sizeof (TypeName##Class), \
(GBaseInitFunc) NULL, \
(GBaseFinalizeFunc) NULL, \
(GClassInitFunc) type_name##_class_intern_init, \
(GClassFinalizeFunc) NULL, \
NULL, /* class_data */ \
sizeof (TypeName), \
0, /* n_preallocs */ \
(GInstanceInitFunc) type_name##_init, \
}; \
g_define_type_id = g_type_register_static (TYPE_PARENT, #TypeName, &g_define_type_info, flags); \
{ CODE ; } \
} \
return g_define_type_id; \
}
/* --- protected (for fundamental type implementations) --- */
GTypePlugin* g_type_get_plugin (GType type);
GTypePlugin* g_type_interface_get_plugin (GType instance_type,
GType interface_type);
GType g_type_fundamental_next (void);
GType g_type_fundamental (GType type_id);
GTypeInstance* g_type_create_instance (GType type);
void g_type_free_instance (GTypeInstance *instance);
void g_type_add_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func);
void g_type_remove_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func);
void g_type_class_unref_uncached (gpointer g_class);
void g_type_add_interface_check (gpointer check_data,
GTypeInterfaceCheckFunc check_func);
void g_type_remove_interface_check (gpointer check_data,
GTypeInterfaceCheckFunc chec_func);
GTypeValueTable* g_type_value_table_peek (GType type);
/*< private >*/
gboolean g_type_check_instance (GTypeInstance *instance);
GTypeInstance* g_type_check_instance_cast (GTypeInstance *instance,
GType iface_type);
gboolean g_type_check_instance_is_a (GTypeInstance *instance,
GType iface_type);
GTypeClass* g_type_check_class_cast (GTypeClass *g_class,
GType is_a_type);
gboolean g_type_check_class_is_a (GTypeClass *g_class,
GType is_a_type);
gboolean g_type_check_is_value_type (GType type);
gboolean g_type_check_value (GValue *value);
gboolean g_type_check_value_holds (GValue *value,
GType type);
gboolean g_type_test_flags (GType type,
guint flags);
/* --- debugging functions --- */
G_CONST_RETURN gchar* g_type_name_from_instance (GTypeInstance *instance);
G_CONST_RETURN gchar* g_type_name_from_class (GTypeClass *g_class);
/* --- implementation bits --- */
#ifndef G_DISABLE_CAST_CHECKS
# define _G_TYPE_CIC(ip, gt, ct) \
((ct*) g_type_check_instance_cast ((GTypeInstance*) ip, gt))
# define _G_TYPE_CCC(cp, gt, ct) \
((ct*) g_type_check_class_cast ((GTypeClass*) cp, gt))
#else /* G_DISABLE_CAST_CHECKS */
# define _G_TYPE_CIC(ip, gt, ct) ((ct*) ip)
# define _G_TYPE_CCC(cp, gt, ct) ((ct*) cp)
#endif /* G_DISABLE_CAST_CHECKS */
#define _G_TYPE_CHI(ip) (g_type_check_instance ((GTypeInstance*) ip))
#define _G_TYPE_CHV(vl) (g_type_check_value ((GValue*) vl))
#define _G_TYPE_IGC(ip, gt, ct) ((ct*) (((GTypeInstance*) ip)->g_class))
#define _G_TYPE_IGI(ip, gt, ct) ((ct*) g_type_interface_peek (((GTypeInstance*) ip)->g_class, gt))
#ifdef __GNUC__
# define _G_TYPE_CIT(ip, gt) (G_GNUC_EXTENSION ({ \
GTypeInstance *__inst = (GTypeInstance*) ip; GType __t = gt; gboolean __r; \
if (__inst && __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 && __class->g_type == __t) \
__r = TRUE; \
else \
__r = g_type_check_class_is_a (__class, __t); \
__r; \
}))
# define _G_TYPE_CVH(vl, gt) (G_GNUC_EXTENSION ({ \
GValue *__val = (GValue*) vl; GType __t = gt; gboolean __r; \
if (__val && __val->g_type == __t) \
__r = TRUE; \
else \
__r = g_type_check_value_holds (__val, __t); \
__r; \
}))
#else /* !__GNUC__ */
# define _G_TYPE_CIT(ip, gt) (g_type_check_instance_is_a ((GTypeInstance*) ip, gt))
# define _G_TYPE_CCT(cp, gt) (g_type_check_class_is_a ((GTypeClass*) cp, gt))
# define _G_TYPE_CVH(vl, gt) (g_type_check_value_holds ((GValue*) vl, gt))
#endif /* !__GNUC__ */
#define G_TYPE_FLAG_RESERVED_ID_BIT ((GType) (1 << 0))
extern GTypeDebugFlags _g_type_debug_flags;
G_END_DECLS
#endif /* __G_TYPE_H__ */
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