/* 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 can be included directly." #endif #ifndef __G_TYPE_H__ #define __G_TYPE_H__ #include 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_SIZE_T != GLIB_SIZEOF_LONG || !defined __cplusplus typedef gsize GType; #else /* for historic reasons, C++ 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 */ 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 check_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_static_simple (GType parent_type, const gchar *type_name, guint class_size, GClassInitFunc class_init, guint instance_size, GInstanceInitFunc instance_init, GTypeFlags flags); GType g_type_register_dynamic (GType parent_type, const gchar *type_name, GTypePlugin *plugin, GTypeFlags flags); GType g_type_register_fundamental (GType type_id, const gchar *type_name, const GTypeInfo *info, const GTypeFundamentalInfo *finfo, GTypeFlags flags); void g_type_add_interface_static (GType instance_type, GType interface_type, const GInterfaceInfo *info); void g_type_add_interface_dynamic (GType instance_type, GType interface_type, GTypePlugin *plugin); void g_type_interface_add_prerequisite (GType interface_type, GType prerequisite_type); GType*g_type_interface_prerequisites (GType interface_type, guint *n_prerequisites); void g_type_class_add_private (gpointer g_class, gsize private_size); gpointer g_type_instance_get_private (GTypeInstance *instance, GType private_type); /* --- 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_BEGIN (TN, t_n, T_P, 0) {_C_;} _G_DEFINE_TYPE_EXTENDED_END() #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_BEGIN (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT) {_C_;} _G_DEFINE_TYPE_EXTENDED_END() #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() /* 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) { \ const GInterfaceInfo g_implement_interface_info = { \ (GInterfaceInitFunc) iface_init, NULL, NULL \ }; \ g_type_add_interface_static (g_define_type_id, TYPE_IFACE, &g_implement_interface_info); \ } #define _G_DEFINE_TYPE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PARENT, flags) \ \ 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 volatile gsize g_define_type_id__volatile = 0; \ if (g_once_init_enter (&g_define_type_id__volatile)) \ { \ GType g_define_type_id = \ g_type_register_static_simple (TYPE_PARENT, \ g_intern_static_string (#TypeName), \ sizeof (TypeName##Class), \ (GClassInitFunc) type_name##_class_intern_init, \ sizeof (TypeName), \ (GInstanceInitFunc) type_name##_init, \ (GTypeFlags) flags); \ { /* custom code follows */ #define _G_DEFINE_TYPE_EXTENDED_END() \ /* following custom code */ \ } \ g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \ } \ return g_define_type_id__volatile; \ } /* closes type_name##_get_type() */ /* --- 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 check_func); GTypeValueTable* g_type_value_table_peek (GType type); /*< private >*/ gboolean g_type_check_instance (GTypeInstance *instance) G_GNUC_PURE; GTypeInstance* g_type_check_instance_cast (GTypeInstance *instance, GType iface_type); gboolean g_type_check_instance_is_a (GTypeInstance *instance, GType iface_type) G_GNUC_PURE; GTypeClass* g_type_check_class_cast (GTypeClass *g_class, GType is_a_type); gboolean g_type_check_class_is_a (GTypeClass *g_class, GType is_a_type) G_GNUC_PURE; gboolean g_type_check_is_value_type (GType type) G_GNUC_CONST; gboolean g_type_check_value (GValue *value) G_GNUC_PURE; gboolean g_type_check_value_holds (GValue *value, GType type) G_GNUC_PURE; gboolean g_type_test_flags (GType type, guint flags) G_GNUC_CONST; /* --- debugging functions --- */ G_CONST_RETURN gchar* g_type_name_from_instance (GTypeInstance *instance); G_CONST_RETURN gchar* g_type_name_from_class (GTypeClass *g_class); /* --- internal functions --- */ G_GNUC_INTERNAL void g_value_c_init (void); /* sync with gvalue.c */ G_GNUC_INTERNAL void g_value_types_init (void); /* sync with gvaluetypes.c */ G_GNUC_INTERNAL void g_enum_types_init (void); /* sync with genums.c */ G_GNUC_INTERNAL void g_param_type_init (void); /* sync with gparam.c */ G_GNUC_INTERNAL void g_boxed_type_init (void); /* sync with gboxed.c */ G_GNUC_INTERNAL void g_object_type_init (void); /* sync with gobject.c */ G_GNUC_INTERNAL void g_param_spec_types_init (void); /* sync with gparamspecs.c */ G_GNUC_INTERNAL void g_value_transforms_init (void); /* sync with gvaluetransform.c */ G_GNUC_INTERNAL void g_signal_init (void); /* sync with gsignal.c */ /* --- implementation bits --- */ #ifndef G_DISABLE_CAST_CHECKS # define _G_TYPE_CIC(ip, gt, ct) \ ((ct*) g_type_check_instance_cast ((GTypeInstance*) ip, gt)) # define _G_TYPE_CCC(cp, gt, ct) \ ((ct*) g_type_check_class_cast ((GTypeClass*) cp, gt)) #else /* G_DISABLE_CAST_CHECKS */ # define _G_TYPE_CIC(ip, gt, ct) ((ct*) ip) # define _G_TYPE_CCC(cp, gt, ct) ((ct*) cp) #endif /* G_DISABLE_CAST_CHECKS */ #define _G_TYPE_CHI(ip) (g_type_check_instance ((GTypeInstance*) ip)) #define _G_TYPE_CHV(vl) (g_type_check_value ((GValue*) vl)) #define _G_TYPE_IGC(ip, gt, ct) ((ct*) (((GTypeInstance*) ip)->g_class)) #define _G_TYPE_IGI(ip, gt, ct) ((ct*) g_type_interface_peek (((GTypeInstance*) ip)->g_class, gt)) #ifdef __GNUC__ # define _G_TYPE_CIT(ip, gt) (G_GNUC_EXTENSION ({ \ GTypeInstance *__inst = (GTypeInstance*) ip; GType __t = gt; gboolean __r; \ if (__inst && __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__ */