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.
57 #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>
73 #include <sys/types.h>
74 #include <ul_gavlcust.h>
76 #include <ul_logreg.h>
78 #ifdef CONFIG_FORB_PROTO_UNIX
79 #include <forb/proto_unix.h>
83 #define UL_LOGL_DEF UL_LOGL_DEB
85 #define UL_LOGL_DEF UL_LOGL_ERR
87 #include "log_domains.inc"
89 extern UL_LOG_CUST(ulogd_forb);
93 destroy_forb_on_exit(int exitcode, void *arg)
100 forb_is_alive(forb_orb _obj, CORBA_Environment *ev)
102 ul_logdeb("%s called\n", __FUNCTION__);
105 static struct forb_forb_orb_impl forb_implementation = {
106 .is_alive = forb_is_alive,
110 * Prepares #FORB_TMP_DIR directory for use by forb
112 * @return Zero on succes, -1 on error and errno is set appropriately.
115 forb_init_tmp_dir(void)
120 ret = stat(FORB_TMP_DIR, &st);
122 if (ret == 0 && !S_ISDIR(st.st_mode)) {
123 ret = unlink(FORB_TMP_DIR);
125 } else if (ret == 0) {
128 return mkdir(FORB_TMP_DIR, 0777);
132 * Thread for execution of remote requests for a FORB object.
139 forb_execution_thread(void *arg)
143 forb_execute_object(orb);
148 forb_init(int *argc, char **argv[], const char *orb_id)
154 forb = forb_malloc(sizeof(*forb));
156 memset(forb, 0, sizeof(*forb));
158 /* Initialize ULUT logging facility */
159 ul_logreg_domains_static(ul_log_domains_array,
160 sizeof(ul_log_domains_array)/sizeof(ul_log_domains_array[0]));
162 forb_server_id_init(&forb->server_id);
163 forb_server_id_to_string(forb->server_id_str, &forb->server_id,
164 sizeof(forb->server_id_str));
165 ul_logdeb("Initializing forb %s\n", forb->server_id_str);
167 if (fosa_mutex_init(&forb->request_id_mutex, 0) != 0) goto err2;
168 if (fosa_mutex_init(&forb->port_mutex, 0) != 0) goto err2;
169 forb_port_init_head(forb);
171 if (fosa_mutex_init(&forb->request_mutex, 0) != 0) goto err2;
172 forb_request_nolock_init_root_field(forb);
174 if (fosa_mutex_init(&forb->peer_mutex, 0) != 0) goto err2;
175 forb_peer_nolock_init_root_field(forb);
177 if (fosa_mutex_init(&forb->objkey_mutex, 0) != 0) goto err2;
178 forb_objects_nolock_init_root_field(forb);
180 if (fosa_mutex_init(&forb->regref_mutex, 0) != 0) goto err2;
181 forb_regref_nolock_init_root_field(forb);
183 ret = forb_init_tmp_dir();
185 ul_logerr("Cannot prepare " FORB_TMP_DIR "\n");
189 orb = forb_forb_orb_new(NULL, &forb_implementation, forb);
191 /* Server ID must be assigned manualy */
192 orb->server = forb->server_id;
194 /* Insert our object reference to objects tree, so that we
195 * can accept remote request to our new ORB. */
196 forb_objects_nolock_insert(forb, orb);
198 ret = fosa_thread_create(&forb->execution_thread, NULL,
199 forb_execution_thread, orb);
203 on_exit(destroy_forb_on_exit, orb);
205 #ifdef CONFIG_FORB_PROTO_UNIX
207 forb_port_t *port = forb_malloc(sizeof(*port));
209 forb_unix_port_init(port, &forb->server_id);
210 forb_register_port(forb, port);
216 err2: forb_free(forb);
220 /* FIXME: forb_destroy is now called automatically on exit. Therefore
221 * forb_destroy() should be either static or should deregister on_exit
222 * handler (how???). */
223 void forb_destroy(forb_orb orb)
225 forb_t *forb = forb_object_to_forb(orb);
227 forb_regref_t *regref;
229 pthread_cancel(forb->execution_thread.pthread_id);
230 pthread_join(forb->execution_thread.pthread_id, NULL);
232 /* Unregister all registered references */
233 while ((regref = forb_regref_first(forb))) {
234 forb_unregister_reference(orb, regref->name);
237 ul_list_for_each_cut(forb_port, forb, port) {
238 forb_destroy_port(port);
240 forb_object_release(orb);
245 /* forb_register_interface(const struct forb_interface *interface) */
247 /* gavl_insert(&type_registry, &interface->node); */
250 * Initializes server ID variable.
252 * @param server_id Serer ID to initialize.
255 forb_server_id_init(forb_server_id *server_id)
257 forb_uuid_generate((forb_uuid_t*)server_id->uuid);
261 forb_instance_data(const forb_object obj)
263 return forb_object_instance_data(obj);
268 * Registers a given object reference so that other FORBs on the same
269 * node can find it by using forb_resolve_reference().
271 * @param object Object reference to register.
272 * @param name Name under which to register the reference.
274 * @return Zero on success, -1 on error.
277 forb_register_reference(forb_object object, const char *name)
279 forb_regref_t *regref;
280 forb_regref_name_t regname;
281 forb_t *forb = forb_object_to_forb(object);
282 char fn[100], fntmp[100];
287 strncpy(regname, name, FORB_REGREF_NAME_LEN-1);
288 regname[FORB_REGREF_NAME_LEN-1]='\0';
290 regref = forb_regref_new(object, regname);
291 if (!regref) goto err;
293 forb_regref_insert(forb, regref);
295 snprintf(fn, sizeof(fn), FORB_TMP_DIR "/%s", regname);
296 snprintf(fntmp, sizeof(fntmp), FORB_TMP_DIR "/%s.%s", regname,
297 forb->server_id_str);
299 f = fopen(fntmp, "w");
300 if (!f) goto unalloc_err;
302 objref = forb_object_to_string(object);
303 if (!objref) goto unalloc_err;
305 ret = fprintf(f, "%s", objref);
307 if (ret < 0) goto unalloc_err;
310 if (ret == EOF) goto unalloc_err;
312 /* Make the atomic registration in filesystem */
313 ret = link(fntmp, fn);
315 /* TODO: If the reference exists, try whether it is
320 /* Unlink the temporary filename */
330 forb_regref_delete(forb, regref);
331 forb_regref_release(regref);
338 forb_unregister_reference(forb_orb orb, const char *name)
340 forb_regref_t *regref;
341 forb_regref_name_t regname;
342 forb_t *forb = forb_object_to_forb(orb);
345 strncpy(regname, name, FORB_REGREF_NAME_LEN-1);
346 regname[FORB_REGREF_NAME_LEN-1]='\0';
348 regref = forb_regref_find(forb, ®name);
349 if (!regref) goto err;
351 forb_regref_delete(forb, regref);
352 forb_regref_release(regref);
354 snprintf(fn, sizeof(fn), FORB_TMP_DIR "/%s", regname);
363 * Returns a named reference previously registered by
364 * forb_register_reference(). This function can be called event if the
365 * reference was registered in a diferent process (but on the same
368 * @param orb Local orb object reference
369 * @param name Name under which the reference was registered.
371 * @return Object reference on NULL in case of error.
374 forb_resolve_reference(const forb_orb orb, const char *name)
376 forb_regref_name_t regname;
382 strncpy(regname, name, FORB_REGREF_NAME_LEN-1);
383 regname[FORB_REGREF_NAME_LEN-1]='\0';
385 snprintf(fn, sizeof(fn), FORB_TMP_DIR "/%s", regname);
391 read(fd, str, sizeof(str)-1);
392 str[sizeof(str)-1] = '\0';
393 object = forb_string_to_object(orb, str);
400 * Returns object reference of forb::orb object associated with a
408 forb_get_orb_of(const forb_object obj)
412 if (forb_server_id_cmp(&obj->server, &obj->orb->server) == 0) {
413 orb = forb_object_duplicate(orb);
415 orb = forb_object_new(obj->orb, &obj->server, 0);
421 * Return instance data registered when the object was created by
424 * @param obj Object reference
426 * @return Pointer to the registered data.
429 forb_instance_data(const forb_object obj)
431 return forb_object_instance_data(obj);
435 * Returns error message correspondings FORB exception.
437 * @param env Environemnt
439 * @return Non-NULL pointer to a string.
442 forb_strerror(CORBA_Environment *env)
445 return "Invalid environemnt";
447 #define ex(e) case FORB_EX_##e: return #e; break;
448 switch (env->major) {
469 ex(OBJECT_NOT_EXIST);
473 return "Invalid error number";