1 /**************************************************************************/
2 /* ---------------------------------------------------------------------- */
3 /* Copyright (C) 2006 - 2008 FRESCOR consortium partners: */
5 /* Universidad de Cantabria, SPAIN */
6 /* University of York, UK */
7 /* Scuola Superiore Sant'Anna, ITALY */
8 /* Kaiserslautern University, GERMANY */
9 /* Univ. Politécnica Valencia, SPAIN */
10 /* Czech Technical University in Prague, CZECH REPUBLIC */
12 /* Thales Communication S.A. FRANCE */
13 /* Visual Tools S.A. SPAIN */
14 /* Rapita Systems Ltd UK */
17 /* See http://www.frescor.org for a link to partners' websites */
19 /* FRESCOR project (FP6/2005/IST/5-034026) is funded */
20 /* in part by the European Union Sixth Framework Programme */
21 /* The European Union is not liable of any use that may be */
22 /* made of this code. */
25 /* This file is part of FORB (Frescor Object Request Broker) */
27 /* FORB is free software; you can redistribute it and/or modify it */
28 /* under terms of the GNU General Public License as published by the */
29 /* Free Software Foundation; either version 2, or (at your option) any */
30 /* later version. FORB is distributed in the hope that it will be */
31 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty */
32 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
33 /* General Public License for more details. You should have received a */
34 /* copy of the GNU General Public License along with FORB; see file */
35 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
36 /* Cambridge, MA 02139, USA. */
38 /* As a special exception, including FORB header files in a file, */
39 /* instantiating FORB generics or templates, or linking other files */
40 /* with FORB objects to produce an executable application, does not */
41 /* by itself cause the resulting executable application to be covered */
42 /* by the GNU General Public License. This exception does not */
43 /* however invalidate any other reasons why the executable file might be */
44 /* covered by the GNU Public License. */
45 /**************************************************************************/
49 * @author Michal Sojka <sojkam1@fel.cvut.cz>
50 * @date Sun Oct 12 17:03:06 2008
52 * @brief Functions for manipulation with FORB's object references.
57 #include <forb/forb-internal.h>
58 #include <forb/object.h>
60 #include <forb/cdr_codec.h>
62 #include "forb_utils.h"
64 #include "object_type.h"
65 #include <forb/types.h>
66 #include <forb/server_id.h>
68 GAVL_CUST_NODE_INT_IMP(forb_objects_nolock /* cust_prefix */,
69 forb_t /* cust_root_t */,
70 struct _forb_object /* cust_item_t */,
71 forb_object_key /* cust_key_t */,
72 objects /* cust_root_node */,
73 node /* cust_item_node */,
74 objkey /* cust_item_key */,
75 forb_objkey_cmp/* cust_cmp_fnc */);
78 * Creates a new object reference.
80 * @param orb FORB object this object reference is handled by. This
81 * can be NULL only when local forb_orb reference is created in
84 * @param server_id Server ID of the remote FORB, where this object is
85 * implemented or NULL if the object is implemented locally by @a orb.
87 * @param key Key of the remote object. If server_id is NULL this
88 * value is ignored and objkey is assigned internally.
90 * @return FORB object reference of NULL in case of error.
93 forb_object_new(forb_orb orb,
94 forb_server_id *server_id,
97 forb_object obj = forb_malloc(sizeof(*obj));
99 memset(obj, 0, sizeof(*obj));
100 forb_ref_init(&obj->ref);
101 obj->orb = orb ? orb : obj;
104 obj->server = *server_id;
109 /* Normal local object */
110 forb_t *forb = forb_object_to_forb(obj);
111 obj->server = forb->server_id;
112 fosa_mutex_lock(&forb->objkey_mutex);
113 obj->objkey = ++forb->objkey;
114 /* We do not use object references for tree pointers. */
115 forb_objects_nolock_insert(forb, obj);
116 fosa_mutex_unlock(&forb->objkey_mutex);
118 /* forb_orb object. The forb_init()
119 * function must assign server field
120 * and put the object into the
130 * This function does the real release of memory when reference count
133 * @note We add this function the _real suffix because the
134 * forb_object_release() is meant for applications use and we want the
135 * name similar to CORBA_Object_release().
138 forb_object_release_real(forb_ref_t *ref)
140 forb_object obj = container_of(ref, struct _forb_object, ref);
143 forb_t *forb = forb_object_to_forb(obj);
144 if (forb_server_id_cmp(&obj->server, &forb->server_id) == 0) {
145 /* Local object - unregister it from FORB. */
146 forb_objects_delete(forb, obj);
152 static inline void forb_object_get(forb_object obj)
154 forb_ref_get(&obj->ref);
157 static inline void forb_object_put(forb_object obj)
159 forb_ref_put(&obj->ref, forb_object_release_real);
160 /* TODO: Exit executor. Question: Shall the executor have its
161 * own refcount? Is so, how do we know to exit/kill it?
162 * Possible answer: The executor might be notified from here
163 * and then exit if it owns the last reference. */
167 * Releases all memory associated with a object reference and
168 * deregister the object from FORB.
170 * @param obj Object reference to release
172 void forb_object_release(forb_object obj)
174 forb_object_put(obj);
178 * Returns the object's key.
184 forb_object_key forb_object_to_key(forb_object obj)
190 * Returns the objects reference of a given key.
195 * @return The object reference or NULL in case the object with a
196 * given key doesn't exist.
198 forb_object forb_key_to_object(forb_t *forb, forb_object_key key)
201 obj = forb_objects_find(forb, key);
206 * Converts object reference to string.
208 * @param obj Object reference to convert.
210 * @return String, which must be freed by forb_free() or NULL in case
214 forb_object_to_string(const forb_object obj)
221 s = 2*sizeof(forb_server_id)+1+2*sizeof(size_t)+1;
227 forb_server_id_to_string(server_id, &obj->server, s);
228 key = forb_object_to_key(obj);
229 snprintf(str, s, "%s-%"PRIu64, server_id, key);
235 * Creates object reference from string.
237 * The string should be generated by forb_object_to_string() in the
238 * same or another FORB. When the returned reference is not needed, it
239 * should be freed by forb_object_release().
241 * @param orb FORB which should handle the object.
242 * @param string The string returned by forb_object_to_string().
244 * @return FORB object reference or NULL in case of error.
247 forb_string_to_object(const forb_orb orb, const char *string)
251 forb_server_id server_id;
254 if (forb_server_id_from_string(&server_id, string) == NULL)
257 if (string[2*sizeof(server_id)] != '-')
260 ret = sscanf(&string[2*sizeof(server_id)+1], "%"SCNu64, &key);
261 if (ret == 0 || ret == EOF)
264 // check if the object you want to create is local or not
265 if (!forb_server_id_cmp(&orb->server, &server_id))
266 obj = forb_objects_find(forb_data(orb), key);
268 obj = forb_object_new(orb, &server_id, key);
274 * Duplicates the object reference.
276 * @param obj Object reference to duplicate.
278 * @return The new copy of @a obj or NULL in case of error. The
279 * duplicated object should be released later by forb_object_release().
282 forb_object_duplicate(const forb_object obj)
287 forb_object_get(obj);
292 * Serialize the object reference.
297 * @return CORBA_TRUE on success, CORBA_FALSE on error.
300 forb_object_serialize(FORB_CDR_Codec *codec, const forb_object *obj)
302 if (!forb_server_id_serialize(codec, &(*obj)->server))
304 if (!forb_object_key_serialize(codec, &(*obj)->objkey))
310 * Creates the object reference by deserialization from ::FORB_CDR_Codec.
315 * @return CORBA_TRUE on success, CORBA_FALSE on error.
318 forb_object_deserialize(FORB_CDR_Codec *codec, forb_object *obj)
320 forb_server_id server_id;
321 forb_object_key objkey;
322 if (!forb_server_id_deserialize(codec, &server_id))
324 if (!forb_object_key_deserialize(codec, &objkey))
329 // check if the object you want to create is local or not
330 if (!forb_server_id_cmp(&codec->orb->server, &server_id))
331 *obj = forb_objects_find(forb_data(codec->orb), objkey);
333 *obj = forb_object_new(codec->orb, &server_id, objkey);