1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
2 /* camel-object.h: Base class for Camel */
5 * Dan Winship <danw@ximian.com>
6 * Michael Zucchi <notzed@ximian.com>
8 * Copyright 2000-2004 Novell, Inc. (www.novell.com)
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU Lesser General Public
12 * License as published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
25 #ifndef CAMEL_OBJECT_H
26 #define CAMEL_OBJECT_H 1
29 #include <stdio.h> /* FILE */
30 #include <stdlib.h> /* size_t */
34 #include <camel/camel-arg.h>
35 #include <camel/camel-types.h> /* this is a @##$@#SF stupid header */
37 /* turn on so that camel_object_class_dump_tree() dumps object instances as well */
38 #define CAMEL_OBJECT_TRACK_INSTANCES
42 typedef struct _CamelObjectClass *CamelType;
44 #ifdef G_DISABLE_CHECKS
45 #define CAMEL_CHECK_CAST(obj, ctype, ptype) ((ptype *) obj)
46 #define CAMEL_CHECK_CLASS_CAST(klass, ctype, ptype) ((ptype *) klass)
48 #define CAMEL_CHECK_CAST(obj, ctype, ptype) ((ptype *) camel_object_cast ((CamelObject *)(obj), (CamelType)(ctype)))
49 #define CAMEL_CHECK_CLASS_CAST(klass, ctype, ptype) ((ptype *) camel_object_class_cast ((CamelObjectClass *)(klass), (CamelType)(ctype) ))
51 #define CAMEL_CHECK_TYPE(obj, ctype) (camel_object_is ((CamelObject *)(obj), (CamelType)(ctype) ))
52 #define CAMEL_CHECK_CLASS_TYPE(klass, ctype) (camel_object_class_is ((CamelObjectClass *)(klass), (CamelType)(ctype)))
54 extern CamelType camel_object_type;
56 #define CAMEL_OBJECT_TYPE (camel_object_type)
58 /* we can't check casts till we've got the type, use the global type variable because its cheaper */
59 #define CAMEL_OBJECT(obj) (CAMEL_CHECK_CAST((obj), camel_object_type, CamelObject))
60 #define CAMEL_OBJECT_CLASS(k) (CAMEL_CHECK_CLASS_CAST ((k), camel_object_type, CamelObjectClass))
61 #define CAMEL_IS_OBJECT(o) (CAMEL_CHECK_TYPE((o), camel_object_type))
62 #define CAMEL_IS_OBJECT_CLASS(k) (CAMEL_CHECK_CLASS_TYPE((k), camel_object_type))
64 #define CAMEL_OBJECT_GET_CLASS(o) ((CamelObjectClass *)(CAMEL_OBJECT(o))->klass)
65 #define CAMEL_OBJECT_GET_TYPE(o) ((CamelType)(CAMEL_OBJECT(o))->klass)
67 typedef struct _CamelObjectClass CamelObjectClass;
68 typedef struct _CamelObject CamelObject;
69 typedef unsigned int CamelObjectHookID;
70 typedef struct _CamelObjectMeta CamelObjectMeta;
72 extern CamelType camel_interface_type;
73 #define CAMEL_INTERFACE_TYPE (camel_interface_type)
74 typedef struct _CamelInterface CamelInterface;
76 typedef void (*CamelObjectClassInitFunc) (CamelObjectClass *);
77 typedef void (*CamelObjectClassFinalizeFunc) (CamelObjectClass *);
78 typedef void (*CamelObjectInitFunc) (CamelObject *, CamelObjectClass *);
79 typedef void (*CamelObjectFinalizeFunc) (CamelObject *);
81 typedef gboolean (*CamelObjectEventPrepFunc) (CamelObject *, gpointer);
82 typedef void (*CamelObjectEventHookFunc) (CamelObject *, gpointer, gpointer);
84 #define CAMEL_INVALID_TYPE (NULL)
86 /* camel object args. */
88 /* Get a description of the object. */
89 CAMEL_OBJECT_ARG_DESCRIPTION = CAMEL_ARG_FIRST, /* Get a copy of the meta-data list (should be freed) */
90 CAMEL_OBJECT_ARG_METADATA,
91 CAMEL_OBJECT_ARG_STATE_FILE,
92 CAMEL_OBJECT_ARG_PERSISTENT_PROPERTIES,
96 CAMEL_OBJECT_DESCRIPTION = CAMEL_OBJECT_ARG_DESCRIPTION | CAMEL_ARG_STR,
97 /* Returns a CamelObjectMeta list */
98 CAMEL_OBJECT_METADATA = CAMEL_OBJECT_ARG_METADATA | CAMEL_ARG_PTR,
99 /* sets where the persistent data should reside, otherwise it isn't persistent */
100 CAMEL_OBJECT_STATE_FILE = CAMEL_OBJECT_ARG_STATE_FILE | CAMEL_ARG_STR,
101 /* returns a GSList CamelProperties of persistent properties */
102 CAMEL_OBJECT_PERSISTENT_PROPERTIES = CAMEL_OBJECT_ARG_PERSISTENT_PROPERTIES | CAMEL_ARG_PTR,
105 typedef enum _CamelObjectFlags {
106 CAMEL_OBJECT_DESTROY = (1<<0),
109 /* returned by get::CAMEL_OBJECT_METADATA */
110 struct _CamelObjectMeta {
111 struct _CamelObjectMeta *next;
114 char name[1]; /* allocated as part of structure */
117 /* TODO: create a simpleobject which has no events on it, or an interface for events */
118 struct _CamelObject {
119 struct _CamelObjectClass *klass;
121 guint32 magic; /* only really needed for debugging ... */
123 /* current hooks on this object */
124 struct _CamelHookList *hooks;
126 guint32 ref_count:24;
129 #ifdef CAMEL_OBJECT_TRACK_INSTANCES
130 struct _CamelObject *next, *prev;
134 struct _CamelObjectClass
136 struct _CamelObjectClass *parent;
138 guint32 magic; /* in same spot for validation */
140 struct _CamelObjectClass *next, *child; /* maintain heirarchy, just for kicks */
144 void *lock; /* lock when used in threading, else just pads struct */
146 /*unsigned short version, revision;*/
148 /* if the object's bigger than 64K, it could use redesigning */
149 unsigned short object_size/*, object_data*/;
150 unsigned short klass_size/*, klass_data*/;
152 /* available hooks for this class */
153 struct _CamelHookPair *hooks;
155 /* memchunks for this type */
156 struct _EMemChunk *instance_chunks;
157 #ifdef CAMEL_OBJECT_TRACK_INSTANCES
158 struct _CamelObject *instances;
162 void (*klass_init)(struct _CamelObjectClass *);
163 void (*klass_finalise)(struct _CamelObjectClass *);
165 /* init/finalise object */
166 void (*init)(struct _CamelObject *, struct _CamelObjectClass *);
167 void (*finalise)(struct _CamelObject *);
169 /* root-class fields follow, type system above */
171 /* get/set interface */
172 int (*setv)(struct _CamelObject *, struct _CamelException *ex, CamelArgV *args);
173 int (*getv)(struct _CamelObject *, struct _CamelException *ex, CamelArgGetV *args);
174 /* we only free 1 at a time, and only pointer types, obviously */
175 void (*free)(struct _CamelObject *, guint32 tag, void *ptr);
177 /* get/set meta-data interface */
178 char *(*meta_get)(struct _CamelObject *, const char * name);
179 gboolean (*meta_set)(struct _CamelObject *, const char * name, const char *value);
181 /* persistence stuff */
182 int (*state_read)(struct _CamelObject *, FILE *fp);
183 int (*state_write)(struct _CamelObject *, FILE *fp);
186 /* an interface is just a class with no instance data */
187 struct _CamelInterface {
188 struct _CamelObjectClass type;
191 /* The type system .... it's pretty simple..... */
192 void camel_type_init (void);
193 CamelType camel_type_register(CamelType parent, const char * name, /*unsigned int ver, unsigned int rev,*/
194 size_t instance_size,
195 size_t classfuncs_size,
196 CamelObjectClassInitFunc class_init,
197 CamelObjectClassFinalizeFunc class_finalize,
198 CamelObjectInitFunc instance_init,
199 CamelObjectFinalizeFunc instance_finalize);
201 CamelType camel_interface_register(CamelType parent, const char *name,
202 size_t classfuncs_size,
203 CamelObjectClassInitFunc class_init,
204 CamelObjectClassFinalizeFunc class_finalize);
206 /* deprecated interface */
207 #define camel_type_get_global_classfuncs(x) ((CamelObjectClass *)(x))
209 /* object class methods (types == classes now) */
210 const char *camel_type_to_name (CamelType type);
211 CamelType camel_name_to_type (const char *name);
212 void camel_object_class_add_event (CamelObjectClass *klass, const char *name, CamelObjectEventPrepFunc prep);
213 void camel_object_class_add_interface(CamelObjectClass *klass, CamelType itype);
215 void camel_object_class_dump_tree (CamelType root);
218 CamelObject *camel_object_cast(CamelObject *obj, CamelType ctype);
219 gboolean camel_object_is(CamelObject *obj, CamelType ctype);
221 CamelObjectClass *camel_object_class_cast (CamelObjectClass *klass, CamelType ctype);
222 gboolean camel_object_class_is (CamelObjectClass *klass, CamelType ctype);
224 CamelObjectClass *camel_interface_cast(CamelObjectClass *klass, CamelType ctype);
225 gboolean camel_interface_is(CamelObjectClass *k, CamelType ctype);
227 CamelType camel_object_get_type (void);
229 CamelObject *camel_object_new (CamelType type);
230 CamelObject *camel_object_new_name (const char *name);
232 void camel_object_ref(void *);
233 void camel_object_unref(void *);
236 #define camel_object_ref(o) (printf("%s (%s:%d):ref (%p)\n", __FUNCTION__, __FILE__, __LINE__, o), camel_object_ref(o))
237 #define camel_object_unref(o) (printf("%s (%s:%d):unref (%p)\n", __FUNCTION__, __FILE__, __LINE__, o), camel_object_unref (o))
241 CamelObjectHookID camel_object_hook_event(void *obj, const char *name, CamelObjectEventHookFunc hook, void *data);
242 void camel_object_remove_event(void *obj, CamelObjectHookID id);
243 void camel_object_unhook_event(void *obj, const char *name, CamelObjectEventHookFunc hook, void *data);
244 void camel_object_trigger_event(void *obj, const char *name, void *event_data);
247 void *camel_object_get_interface(void *vo, CamelType itype);
249 /* get/set methods */
250 int camel_object_set(void *obj, struct _CamelException *ex, ...);
251 int camel_object_setv(void *obj, struct _CamelException *ex, CamelArgV *);
252 int camel_object_get(void *obj, struct _CamelException *ex, ...);
253 int camel_object_getv(void *obj, struct _CamelException *ex, CamelArgGetV *);
255 /* not very efficient one-time calls */
256 void *camel_object_get_ptr(void *vo, CamelException *ex, int tag);
257 int camel_object_get_int(void *vo, CamelException *ex, int tag);
259 /* meta-data for user-specific data */
260 char *camel_object_meta_get(void *vo, const char * name);
261 gboolean camel_object_meta_set(void *vo, const char * name, const char *value);
263 /* reads/writes the state from/to the CAMEL_OBJECT_STATE_FILE */
264 int camel_object_state_read(void *vo);
265 int camel_object_state_write(void *vo);
267 /* free a retrieved object. May be a noop for static data. */
268 void camel_object_free(void *vo, guint32 tag, void *value);
270 /* for managing bags of weakly-ref'd 'child' objects */
271 typedef struct _CamelObjectBag CamelObjectBag;
272 typedef void *(*CamelCopyFunc)(const void *vo);
274 CamelObjectBag *camel_object_bag_new(GHashFunc hash, GEqualFunc equal, CamelCopyFunc keycopy, GFreeFunc keyfree);
275 void *camel_object_bag_get(CamelObjectBag *bag, const void *key);
276 void *camel_object_bag_peek(CamelObjectBag *bag, const void *key);
277 void *camel_object_bag_reserve(CamelObjectBag *bag, const void *key);
278 void camel_object_bag_add(CamelObjectBag *bag, const void *key, void *o);
279 void camel_object_bag_abort(CamelObjectBag *bag, const void *key);
280 void camel_object_bag_rekey(CamelObjectBag *bag, void *o, const void *newkey);
281 GPtrArray *camel_object_bag_list(CamelObjectBag *bag);
282 void camel_object_bag_remove(CamelObjectBag *bag, void *o);
283 void camel_object_bag_destroy(CamelObjectBag *bag);
285 #define CAMEL_MAKE_CLASS(type, tname, parent, pname) \
286 static CamelType type##_type; \
287 static pname##Class * type##_parent_class; \
290 type##_get_type(void) \
292 if (type##_type == 0) { \
293 type##_parent_class = (pname##Class *)parent##_get_type(); \
294 type##_type = camel_type_register( \
295 type##_parent_class, #tname "Class", \
297 sizeof(tname ## Class), \
298 (CamelObjectClassInitFunc) type##_class_init, \
300 (CamelObjectInitFunc) type##_init, \
301 (CamelObjectFinalizeFunc) type##_finalise); \
304 return type##_type; \
307 /* Utility functions, not object specific, but too small to separate */
308 typedef struct _CamelIteratorVTable CamelIteratorVTable;
309 typedef struct _CamelIterator CamelIterator;
311 struct _CamelIteratorVTable {
312 /* free fields, dont free base object */
313 void (*free)(void *it);
314 /* go to the next messageinfo */
315 const void *(*next)(void *it, CamelException *ex);
316 /* go back to the start */
317 void (*reset)(void *it);
318 /* *ESTIMATE* how many results are in the iterator */
319 int (*length)(void *it);
322 struct _CamelIterator {
323 CamelIteratorVTable *klass;
325 /* subclasses adds new fields afterwards */
328 void *camel_iterator_new(CamelIteratorVTable *klass, size_t size);
329 void camel_iterator_free(void *it);
330 const void *camel_iterator_next(void *it, CamelException *ex);
331 void camel_iterator_reset(void *it);
332 int camel_iterator_length(void *it);
336 #endif /* CAMEL_OBJECT_H */