1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
22 #if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
23 #error "Only <glib-object.h> can be included directly."
32 #define G_TYPE_FUNDAMENTAL(type) ((type) & 0xff)
33 #define G_TYPE_FUNDAMENTAL_MAX (0xff)
34 #define G_TYPE_DERIVE_ID(ptype, branch_seqno) (G_TYPE_FUNDAMENTAL (ptype) | ((branch_seqno) << 8))
35 #define G_TYPE_BRANCH_SEQNO(type) ((type) >> 8)
36 #define G_TYPE_FUNDAMENTAL_LAST ((GType) g_type_fundamental_last ())
39 /* predefined fundamental and derived types
41 typedef enum /*< skip >*/
43 /* standard types, introduced by g_type_init() */
68 /* reserved fundamental type ids,
69 * mail gtk-devel-list@redhat.com for reservations
71 G_TYPE_RESERVED_BSE_FIRST,
72 G_TYPE_RESERVED_BSE_LAST = G_TYPE_RESERVED_BSE_FIRST + 15,
73 G_TYPE_RESERVED_LAST_FUNDAMENTAL,
75 /* derived type ids */
76 G_TYPE_CLOSURE = G_TYPE_DERIVE_ID (G_TYPE_BOXED, 1),
77 G_TYPE_VALUE = G_TYPE_DERIVE_ID (G_TYPE_BOXED, 2),
78 G_TYPE_VALUE_ARRAY = G_TYPE_DERIVE_ID (G_TYPE_BOXED, 3),
79 G_TYPE_GSTRING = G_TYPE_DERIVE_ID (G_TYPE_BOXED, 4),
80 G_TYPE_PARAM_CHAR = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 1),
81 G_TYPE_PARAM_UCHAR = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 2),
82 G_TYPE_PARAM_BOOLEAN = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 3),
83 G_TYPE_PARAM_INT = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 4),
84 G_TYPE_PARAM_UINT = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 5),
85 G_TYPE_PARAM_LONG = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 6),
86 G_TYPE_PARAM_ULONG = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 7),
87 G_TYPE_PARAM_INT64 = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 8),
88 G_TYPE_PARAM_UINT64 = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 9),
89 G_TYPE_PARAM_UNICHAR = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 10),
90 G_TYPE_PARAM_ENUM = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 11),
91 G_TYPE_PARAM_FLAGS = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 12),
92 G_TYPE_PARAM_FLOAT = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 13),
93 G_TYPE_PARAM_DOUBLE = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 14),
94 G_TYPE_PARAM_STRING = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 15),
95 G_TYPE_PARAM_PARAM = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 16),
96 G_TYPE_PARAM_BOXED = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 17),
97 G_TYPE_PARAM_POINTER = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 18),
98 G_TYPE_PARAM_VALUE_ARRAY = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 19),
99 G_TYPE_PARAM_OBJECT = G_TYPE_DERIVE_ID (G_TYPE_PARAM, 20)
104 /* Type Checking Macros
106 #define G_TYPE_IS_FUNDAMENTAL(type) (G_TYPE_BRANCH_SEQNO (type) == 0)
107 #define G_TYPE_IS_DERIVED(type) (G_TYPE_BRANCH_SEQNO (type) > 0)
108 #define G_TYPE_IS_INTERFACE(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_INTERFACE)
109 #define G_TYPE_IS_CLASSED(type) (g_type_test_flags ((type), G_TYPE_FLAG_CLASSED))
110 #define G_TYPE_IS_INSTANTIATABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_INSTANTIATABLE))
111 #define G_TYPE_IS_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DERIVABLE))
112 #define G_TYPE_IS_DEEP_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DEEP_DERIVABLE))
113 #define G_TYPE_IS_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_ABSTRACT))
114 #define G_TYPE_IS_VALUE_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_VALUE_ABSTRACT))
115 #define G_TYPE_IS_PARAM(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_PARAM)
116 #define G_TYPE_IS_VALUE_TYPE(type) (g_type_check_is_value_type (type))
117 #define G_TYPE_HAS_VALUE_TABLE(type) (g_type_value_table_peek (type) != NULL)
122 typedef guint32 GType;
123 typedef struct _GValue GValue;
124 typedef union _GTypeCValue GTypeCValue;
125 typedef struct _GTypePlugin GTypePlugin;
126 typedef struct _GTypeClass GTypeClass;
127 typedef struct _GTypeInterface GTypeInterface;
128 typedef struct _GTypeInstance GTypeInstance;
129 typedef struct _GTypeInfo GTypeInfo;
130 typedef struct _GTypeFundamentalInfo GTypeFundamentalInfo;
131 typedef struct _GInterfaceInfo GInterfaceInfo;
132 typedef struct _GTypeValueTable GTypeValueTable;
133 typedef struct _GTypeQuery GTypeQuery;
136 /* Basic Type Structures
143 struct _GTypeInstance
148 struct _GTypeInterface
151 GType g_type; /* iface type */
152 GType g_instance_type;
157 const gchar *type_name;
163 /* Casts, checks and accessors for structured types
164 * usage of these macros is reserved to type implementations only
167 #define G_TYPE_CHECK_INSTANCE(instance) (_G_TYPE_CHI ((GTypeInstance*) (instance)))
168 #define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type) (_G_TYPE_CIC ((instance), (g_type), c_type))
169 #define G_TYPE_CHECK_INSTANCE_TYPE(instance, g_type) (_G_TYPE_CIT ((instance), (g_type)))
170 #define G_TYPE_INSTANCE_GET_CLASS(instance, g_type, c_type) (_G_TYPE_IGC ((instance), (g_type), c_type))
171 #define G_TYPE_INSTANCE_GET_INTERFACE(instance, g_type, c_type) (_G_TYPE_IGI ((instance), (g_type), c_type))
172 #define G_TYPE_CHECK_CLASS_CAST(g_class, g_type, c_type) (_G_TYPE_CCC ((g_class), (g_type), c_type))
173 #define G_TYPE_CHECK_CLASS_TYPE(g_class, g_type) (_G_TYPE_CCT ((g_class), (g_type)))
174 #define G_TYPE_CHECK_VALUE(value) (_G_TYPE_CHV ((value)))
175 #define G_TYPE_CHECK_VALUE_TYPE(value, g_type) (_G_TYPE_CVH ((value), (g_type)))
176 #define G_TYPE_FROM_INSTANCE(instance) (G_TYPE_FROM_CLASS (((GTypeInstance*) (instance))->g_class))
177 #define G_TYPE_FROM_CLASS(g_class) (((GTypeClass*) (g_class))->g_type)
178 #define G_TYPE_FROM_INTERFACE(g_iface) (((GTypeInterface*) (g_iface))->g_type)
181 /* debug flags for g_type_init_with_debug_flags() */
182 typedef enum /*< skip >*/
184 G_TYPE_DEBUG_NONE = 0,
185 G_TYPE_DEBUG_OBJECTS = 1 << 0,
186 G_TYPE_DEBUG_SIGNALS = 1 << 1,
187 G_TYPE_DEBUG_MASK = 0x03
191 /* --- prototypes --- */
192 void g_type_init (void);
193 void g_type_init_with_debug_flags (GTypeDebugFlags debug_flags);
194 G_CONST_RETURN gchar* g_type_name (GType type);
195 GQuark g_type_qname (GType type);
196 GType g_type_from_name (const gchar *name);
197 GType g_type_parent (GType type);
198 guint g_type_depth (GType type);
199 GType g_type_next_base (GType leaf_type,
201 gboolean g_type_is_a (GType type,
203 guint g_type_fundamental_branch_last (GType type);
204 gpointer g_type_class_ref (GType type);
205 gpointer g_type_class_peek (GType type);
206 void g_type_class_unref (gpointer g_class);
207 gpointer g_type_class_peek_parent (gpointer g_class);
208 gpointer g_type_interface_peek (gpointer instance_class,
210 gpointer g_type_interface_peek_parent (gpointer g_iface);
212 /* g_free() the returned arrays */
213 GType* g_type_children (GType type,
215 GType* g_type_interfaces (GType type,
216 guint *n_interfaces);
218 /* per-type _static_ data */
219 void g_type_set_qdata (GType type,
222 gpointer g_type_get_qdata (GType type,
224 void g_type_query (GType type,
228 /* --- type registration --- */
229 typedef void (*GBaseInitFunc) (gpointer g_class);
230 typedef void (*GBaseFinalizeFunc) (gpointer g_class);
231 typedef void (*GClassInitFunc) (gpointer g_class,
232 gpointer class_data);
233 typedef void (*GClassFinalizeFunc) (gpointer g_class,
234 gpointer class_data);
235 typedef void (*GInstanceInitFunc) (GTypeInstance *instance,
237 typedef void (*GInterfaceInitFunc) (gpointer g_iface,
238 gpointer iface_data);
239 typedef void (*GInterfaceFinalizeFunc) (gpointer g_iface,
240 gpointer iface_data);
241 typedef gboolean (*GTypeClassCacheFunc) (gpointer cache_data,
242 GTypeClass *g_class);
243 typedef enum /*< skip >*/
245 G_TYPE_FLAG_CLASSED = (1 << 0),
246 G_TYPE_FLAG_INSTANTIATABLE = (1 << 1),
247 G_TYPE_FLAG_DERIVABLE = (1 << 2),
248 G_TYPE_FLAG_DEEP_DERIVABLE = (1 << 3)
249 } GTypeFundamentalFlags;
250 typedef enum /*< skip >*/
252 G_TYPE_FLAG_ABSTRACT = (1 << 4),
253 G_TYPE_FLAG_VALUE_ABSTRACT = (1 << 5)
257 /* interface types, classed types, instantiated types */
260 GBaseInitFunc base_init;
261 GBaseFinalizeFunc base_finalize;
263 /* classed types, instantiated types */
264 GClassInitFunc class_init;
265 GClassFinalizeFunc class_finalize;
266 gconstpointer class_data;
268 /* instantiated types */
269 guint16 instance_size;
271 GInstanceInitFunc instance_init;
274 const GTypeValueTable *value_table;
276 struct _GTypeFundamentalInfo
278 GTypeFundamentalFlags type_flags;
280 struct _GInterfaceInfo
282 GInterfaceInitFunc interface_init;
283 GInterfaceFinalizeFunc interface_finalize;
284 gpointer interface_data;
286 struct _GTypeValueTable
288 void (*value_init) (GValue *value);
289 void (*value_free) (GValue *value);
290 void (*value_copy) (const GValue *src_value,
292 /* varargs functionality (optional) */
293 gpointer (*value_peek_pointer) (const GValue *value);
294 gchar *collect_format;
295 gchar* (*collect_value) (GValue *value,
296 guint n_collect_values,
297 GTypeCValue *collect_values,
298 guint collect_flags);
300 gchar* (*lcopy_value) (const GValue *value,
301 guint n_collect_values,
302 GTypeCValue *collect_values,
303 guint collect_flags);
305 GType g_type_register_static (GType parent_type,
306 const gchar *type_name,
307 const GTypeInfo *info,
309 GType g_type_register_dynamic (GType parent_type,
310 const gchar *type_name,
313 GType g_type_register_fundamental (GType type_id,
314 const gchar *type_name,
315 const GTypeInfo *info,
316 const GTypeFundamentalInfo *finfo,
318 void g_type_add_interface_static (GType instance_type,
319 GType interface_type,
320 const GInterfaceInfo *info);
321 void g_type_add_interface_dynamic (GType instance_type,
322 GType interface_type,
323 GTypePlugin *plugin);
324 void g_type_interface_add_prerequisite (GType interface_type,
325 GType prerequisite_type);
328 /* --- protected (for fundamental type implementations) --- */
329 GTypePlugin* g_type_get_plugin (GType type);
330 GTypePlugin* g_type_interface_get_plugin (GType instance_type,
331 GType implementation_type);
333 GType g_type_fundamental_last (void);
334 GTypeInstance* g_type_create_instance (GType type);
335 void g_type_free_instance (GTypeInstance *instance);
336 void g_type_add_class_cache_func (gpointer cache_data,
337 GTypeClassCacheFunc cache_func);
338 void g_type_remove_class_cache_func (gpointer cache_data,
339 GTypeClassCacheFunc cache_func);
340 void g_type_class_unref_uncached (gpointer g_class);
341 GTypeValueTable* g_type_value_table_peek (GType type);
345 gboolean g_type_check_instance (GTypeInstance *instance);
346 GTypeInstance* g_type_check_instance_cast (GTypeInstance *instance,
348 gboolean g_type_check_instance_is_a (GTypeInstance *instance,
350 GTypeClass* g_type_check_class_cast (GTypeClass *g_class,
352 gboolean g_type_check_class_is_a (GTypeClass *g_class,
354 gboolean g_type_check_is_value_type (GType type);
355 gboolean g_type_check_value (GValue *value);
356 gboolean g_type_check_value_holds (GValue *value,
358 gboolean g_type_test_flags (GType type,
362 /* --- debugging functions --- */
363 G_CONST_RETURN gchar* g_type_name_from_instance (GTypeInstance *instance);
364 G_CONST_RETURN gchar* g_type_name_from_class (GTypeClass *g_class);
367 /* --- implementation bits --- */
368 #ifndef G_DISABLE_CAST_CHECKS
369 # define _G_TYPE_CIC(ip, gt, ct) \
370 ((ct*) g_type_check_instance_cast ((GTypeInstance*) ip, gt))
371 # define _G_TYPE_CCC(cp, gt, ct) \
372 ((ct*) g_type_check_class_cast ((GTypeClass*) cp, gt))
373 #else /* G_DISABLE_CAST_CHECKS */
374 # define _G_TYPE_CIC(ip, gt, ct) ((ct*) ip)
375 # define _G_TYPE_CCC(cp, gt, ct) ((ct*) cp)
376 #endif /* G_DISABLE_CAST_CHECKS */
377 #define _G_TYPE_CHI(ip) (g_type_check_instance ((GTypeInstance*) ip))
378 #define _G_TYPE_CVH(vl, gt) (g_type_check_value_holds ((GValue*) vl, gt))
379 #define _G_TYPE_CHV(vl) (g_type_check_value ((GValue*) vl))
380 #define _G_TYPE_IGC(ip, gt, ct) ((ct*) (((GTypeInstance*) ip)->g_class))
381 #define _G_TYPE_IGI(ip, gt, ct) ((ct*) g_type_interface_peek (((GTypeInstance*) ip)->g_class, gt))
383 # define _G_TYPE_CIT(ip, gt) ({ \
384 GTypeInstance *__inst = (GTypeInstance*) ip; GType __t = gt; gboolean __r; \
385 if (__inst && __inst->g_class && __inst->g_class->g_type == __t) \
388 __r = g_type_check_instance_is_a (__inst, __t); \
391 # define _G_TYPE_CCT(cp, gt) ({ \
392 GTypeClass *__class = (GTypeClass*) cp; GType __t = gt; gboolean __r; \
393 if (__class && __class->g_type == __t) \
396 __r = g_type_check_class_is_a (__class, __t); \
399 #else /* !__GNUC__ */
400 # define _G_TYPE_CIT(ip, gt) (g_type_check_instance_is_a ((GTypeInstance*) ip, gt))
401 # define _G_TYPE_CCT(cp, gt) (g_type_check_class_is_a ((GTypeClass*) cp, gt))
402 #endif /* !__GNUC__ */
403 #define G_TYPE_FLAG_RESERVED_ID_BIT (1 << 30)
404 extern GTypeDebugFlags _g_type_debug_flags;
408 #endif /* __G_TYPE_H__ */