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 16:57:01 2008
52 * @brief Implementation of basic FORB's functions.
58 #define _BSD_SOURCE /* Because of on_exit() */
62 #include <forb/config.h>
63 #include <forb/forb-internal.h>
67 #include <forb/object.h>
68 #include <forb/uuid.h>
72 #include <sys/types.h>
73 #include <ul_gavlcust.h>
75 #include <ul_logreg.h>
77 #ifdef CONFIG_FORB_PROTO_UNIX
78 #include <forb/proto_unix.h>
80 #ifdef CONFIG_FORB_PROTO_INET_DEFAULT
81 #include <forb/proto_inet.h>
86 #define UL_LOGL_DEF UL_LOGL_DEB
88 #define UL_LOGL_DEF UL_LOGL_ERR
90 #include "log_domains.inc"
92 extern UL_LOG_CUST(ulogd_forb);
94 UL_LOGREG_DOMAINS_INIT_FUNCTION(forb_logreg_domains, forb_logreg_domains_array);
97 destroy_forb_on_exit(int exitcode, void *arg)
104 forb_is_alive(forb_orb _obj, CORBA_Environment *ev)
106 ul_logdeb("%s called\n", __FUNCTION__);
109 static struct forb_forb_orb_impl forb_implementation = {
110 .is_alive = forb_is_alive,
114 * Prepares #FORB_TMP_DIR directory for use by forb
116 * @return Zero on succes, -1 on error and errno is set appropriately.
119 forb_init_tmp_dir(void)
124 ret = stat(FORB_TMP_DIR, &st);
126 if (ret == 0 && !S_ISDIR(st.st_mode)) {
127 ret = unlink(FORB_TMP_DIR);
129 } else if (ret == 0) {
132 return mkdir(FORB_TMP_DIR, 0777);
136 * Thread for execution of remote requests for a FORB object.
143 forb_execution_thread(void *arg)
147 forb_execute_object(orb);
152 forb_init(int *argc, char **argv[], const struct forb_init_attr *attr)
158 forb = forb_malloc(sizeof(*forb));
160 memset(forb, 0, sizeof(*forb));
162 /* Initialize ULUT logging facility */
163 forb_logreg_domains();
168 memset(&forb->attr, 0, sizeof(forb->attr));
171 if (forb_server_id_empty(&forb->attr.fixed_server_id)) {
172 forb_server_id_init(&forb->server_id);
174 forb->server_id = forb->attr.fixed_server_id;
176 forb_server_id_to_string(forb->server_id_str, &forb->server_id,
177 sizeof(forb->server_id_str));
178 ul_logdeb("Initializing forb %s\n", forb->server_id_str);
180 if (fosa_mutex_init(&forb->request_id_mutex, 0) != 0) goto err2;
181 if (fosa_mutex_init(&forb->port_mutex, 0) != 0) goto err2;
182 forb_port_init_head(forb);
184 if (fosa_mutex_init(&forb->request_mutex, 0) != 0) goto err2;
185 forb_request_nolock_init_root_field(forb);
187 if (fosa_mutex_init(&forb->peer_mutex, 0) != 0) goto err2;
188 forb_peer_nolock_init_root_field(forb);
190 if (fosa_mutex_init(&forb->objkey_mutex, 0) != 0) goto err2;
191 forb_objects_nolock_init_root_field(forb);
193 if (fosa_mutex_init(&forb->regref_mutex, 0) != 0) goto err2;
194 forb_regref_nolock_init_root_field(forb);
196 ret = forb_init_tmp_dir();
198 ul_logerr("Cannot prepare " FORB_TMP_DIR "\n");
202 orb = forb_forb_orb_new(NULL, &forb_implementation, forb);
204 /* Server ID must be assigned manualy */
205 orb->server = forb->server_id;
209 /* Insert our object reference to objects tree, so that we
210 * can accept remote request to our new ORB. */
211 forb_objects_nolock_insert(forb, orb);
213 ret = fosa_thread_create(&forb->execution_thread, NULL,
214 forb_execution_thread, orb);
218 on_exit(destroy_forb_on_exit, orb);
220 #ifdef CONFIG_FORB_PROTO_UNIX
222 forb_port_t *port = forb_malloc(sizeof(*port));
224 memset(port, 0, sizeof(*port));
225 ret = forb_unix_port_init(&port->desc, &forb->server_id);
226 if (ret) goto err_free_unix;
227 ret = forb_register_port(orb, port);
228 if (ret) goto err_free_unix; /* TODO: forb_unix_port_done() */
237 #ifdef CONFIG_FORB_PROTO_INET_DEFAULT
239 forb_port_t *port = forb_malloc(sizeof(*port));
241 struct in_addr listen_on;
243 memset(port, 0, sizeof(*port));
244 listen_on.s_addr = INADDR_ANY;
245 ret = forb_inet_port_init(&port->desc, listen_on,
246 forb->attr.fixed_tcp_port);
247 if (ret) goto err_free_inet;
248 ret = forb_register_port(orb, port);
249 if (ret) goto err_free_inet; /* TODO: forb_inet_port_done() */
260 err2: forb_free(forb);
264 /* FIXME: forb_destroy is now called automatically on exit. Therefore
265 * forb_destroy() should be either static or should deregister on_exit
266 * handler (how???). */
267 void forb_destroy(forb_orb orb)
269 forb_t *forb = forb_object_to_forb(orb);
271 forb_regref_t *regref;
273 pthread_cancel(forb->execution_thread.pthread_id);
274 pthread_join(forb->execution_thread.pthread_id, NULL);
276 /* Unregister all registered references */
277 while ((regref = forb_regref_first(forb))) {
278 forb_unregister_reference(orb, regref->name.str);
281 ul_list_for_each_cut(forb_port, forb, port) {
282 forb_destroy_port(port);
284 forb_object_release(orb);
289 /* forb_register_interface(const struct forb_interface *interface) */
291 /* gavl_insert(&type_registry, &interface->node); */
295 * Initializes server ID variable.
297 * @param server_id Serer ID to initialize.
300 forb_server_id_init(forb_server_id *server_id)
302 forb_uuid_generate((forb_uuid_t*)server_id->uuid);
306 * Checks whether the @a object is stale. Stale object is an object
307 * reference whose server cannot be contacted to handle requests.
309 * @param object Object reference to check.
311 * @return True if the object is stale, false otherwise.
313 bool forb_object_is_stale(forb_object object)
319 remote_orb = forb_get_orb_of(object);
320 if (!remote_orb) { /* This shohuld never happen */
323 /* TODO: Check not only the ORB, but also whether the object
324 * is still registered with the remote orb. */
325 forb_orb_is_alive(remote_orb, &env);
326 if (env.major == FORB_EX_COMM_FAILURE) {
327 /* Orb is not alive */
330 if (forb_exception_occurred(&env)) {
331 ul_logerr("%s: unexpected exception: %s\n", __FUNCTION__, forb_strerror(&env));
336 forb_object_release(remote_orb);
343 * Returns object reference of forb::orb object associated with the
351 forb_get_orb_of(const forb_object obj)
355 if (forb_server_id_cmp(&obj->server, &obj->orb->server) == 0) {
356 orb = forb_object_duplicate(obj->orb);
358 orb = forb_object_new(obj->orb, &obj->server, 0);
364 * Returns server ID of an object reference.
370 forb_get_server_id(const forb_object obj, forb_server_id *dest)
379 * Return instance data registered when the object was created by
382 * @param obj Object reference
384 * @return Pointer to the registered data.
387 forb_instance_data(const forb_object obj)
389 return forb_object_instance_data(obj);
393 * Returns error message correspondings FORB exception.
395 * @param env Environemnt
397 * @return Non-NULL pointer to a string.
400 forb_strerror(CORBA_Environment *env)
403 return "Invalid environemnt";
405 #define ex(e) case FORB_EX_##e: return #e; break;
406 switch (env->major) {
427 ex(OBJECT_NOT_EXIST);
432 return "Invalid error number";
436 * Return server id of the requesting application.
438 * This function should be only called from within interface
441 * @param[in] obj Object being requested
442 * @param[out] req_source Server ID of the requesting application
445 forb_get_req_source(const forb_object obj, forb_server_id *req_source)
448 if (obj && obj->exec_req) {
449 *req_source = obj->exec_req->source;
451 memset(req_source, 0, sizeof(*req_source));
457 * Internal function for allocation of sequence bufers. Used by
458 * forb_sequence_alloc_buf().
464 * @param num_elements
467 * @return CORBA_TRUE if the allocation was sucessfull, CORBA_FALSE if wasn't.
470 __forb_sequence_alloc_buf_internal(void *seq, size_t seq_size,
471 void **buf_pptr, CORBA_unsigned_long *maximum_ptr,
472 unsigned num_elements, size_t elem_size)
474 memset(seq, 0, seq_size);
475 /*(seq)._length = 0;*/
476 if (num_elements && elem_size) *buf_pptr = forb_malloc(num_elements * elem_size);
477 else *buf_pptr = NULL;
478 *maximum_ptr = *buf_pptr ? num_elements : 0;
479 return (*buf_pptr != NULL) || (num_elements == 0);