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1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
2 | * 2010 Alexis Halle | |
3 | * | |
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 2.1 of the License, or (at your option) any later version. | |
8 | * | |
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. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with this library; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | ||
21 | #include <sys/shm.h> | |
22 | #include <unistd.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | ||
26 | #include <stdlib.h> | |
27 | #include <stdio.h> | |
28 | #include <string.h> | |
29 | #include <errno.h> | |
30 | #include <assert.h> | |
31 | ||
32 | #include "libustd.h" | |
33 | #include "usterr.h" | |
34 | #include "ustcomm.h" | |
35 | ||
36 | /* return value: 0 = subbuffer is finished, it won't produce data anymore | |
37 | * 1 = got subbuffer successfully | |
38 | * <0 = error | |
39 | */ | |
40 | ||
41 | #define GET_SUBBUF_OK 1 | |
42 | #define GET_SUBBUF_DONE 0 | |
43 | #define GET_SUBBUF_DIED 2 | |
44 | ||
45 | #define PUT_SUBBUF_OK 1 | |
46 | #define PUT_SUBBUF_DIED 0 | |
47 | #define PUT_SUBBUF_PUSHED 2 | |
48 | #define PUT_SUBBUF_DONE 3 | |
49 | ||
50 | #define UNIX_PATH_MAX 108 | |
51 | ||
52 | int get_subbuffer(struct buffer_info *buf) | |
53 | { | |
54 | char *send_msg=NULL; | |
55 | char *received_msg=NULL; | |
56 | char *rep_code=NULL; | |
57 | int retval; | |
58 | int result; | |
59 | ||
60 | asprintf(&send_msg, "get_subbuffer %s", buf->name); | |
61 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); | |
62 | if((result == -1 && (errno == ECONNRESET || errno == EPIPE)) || result == 0) { | |
63 | DBG("app died while being traced"); | |
64 | retval = GET_SUBBUF_DIED; | |
65 | goto end; | |
66 | } | |
67 | else if(result < 0) { | |
68 | ERR("get_subbuffer: ustcomm_send_request failed"); | |
69 | retval = -1; | |
70 | goto end; | |
71 | } | |
72 | ||
73 | result = sscanf(received_msg, "%as %ld", &rep_code, &buf->consumed_old); | |
74 | if(result != 2 && result != 1) { | |
75 | ERR("unable to parse response to get_subbuffer"); | |
76 | retval = -1; | |
77 | free(received_msg); | |
78 | goto end_rep; | |
79 | } | |
80 | ||
81 | if(!strcmp(rep_code, "OK")) { | |
82 | DBG("got subbuffer %s", buf->name); | |
83 | retval = GET_SUBBUF_OK; | |
84 | } | |
85 | else if(nth_token_is(received_msg, "END", 0) == 1) { | |
86 | retval = GET_SUBBUF_DONE; | |
87 | goto end_rep; | |
88 | } | |
89 | else if(!strcmp(received_msg, "NOTFOUND")) { | |
90 | DBG("For buffer %s, the trace was not found. This likely means it was destroyed by the user.", buf->name); | |
91 | retval = GET_SUBBUF_DIED; | |
92 | goto end_rep; | |
93 | } | |
94 | else { | |
95 | DBG("error getting subbuffer %s", buf->name); | |
96 | retval = -1; | |
97 | } | |
98 | ||
99 | /* FIXME: free correctly the stuff */ | |
100 | end_rep: | |
101 | if(rep_code) | |
102 | free(rep_code); | |
103 | end: | |
104 | if(send_msg) | |
105 | free(send_msg); | |
106 | if(received_msg) | |
107 | free(received_msg); | |
108 | ||
109 | return retval; | |
110 | } | |
111 | ||
112 | int put_subbuffer(struct buffer_info *buf) | |
113 | { | |
114 | char *send_msg=NULL; | |
115 | char *received_msg=NULL; | |
116 | char *rep_code=NULL; | |
117 | int retval; | |
118 | int result; | |
119 | ||
120 | asprintf(&send_msg, "put_subbuffer %s %ld", buf->name, buf->consumed_old); | |
121 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); | |
122 | if(result < 0 && (errno == ECONNRESET || errno == EPIPE)) { | |
123 | retval = PUT_SUBBUF_DIED; | |
124 | goto end; | |
125 | } | |
126 | else if(result < 0) { | |
127 | ERR("put_subbuffer: send_message failed"); | |
128 | retval = -1; | |
129 | goto end; | |
130 | } | |
131 | else if(result == 0) { | |
132 | /* Program seems finished. However this might not be | |
133 | * the last subbuffer that has to be collected. | |
134 | */ | |
135 | retval = PUT_SUBBUF_DIED; | |
136 | goto end; | |
137 | } | |
138 | ||
139 | result = sscanf(received_msg, "%as", &rep_code); | |
140 | if(result != 1) { | |
141 | ERR("unable to parse response to put_subbuffer"); | |
142 | retval = -1; | |
143 | goto end_rep; | |
144 | } | |
145 | ||
146 | if(!strcmp(rep_code, "OK")) { | |
147 | DBG("subbuffer put %s", buf->name); | |
148 | retval = PUT_SUBBUF_OK; | |
149 | } | |
150 | else if(!strcmp(received_msg, "NOTFOUND")) { | |
151 | DBG("For buffer %s, the trace was not found. This likely means it was destroyed by the user.", buf->name); | |
152 | /* However, maybe this was not the last subbuffer. So | |
153 | * we return the program died. | |
154 | */ | |
155 | retval = PUT_SUBBUF_DIED; | |
156 | goto end_rep; | |
157 | } | |
158 | else { | |
159 | DBG("put_subbuffer: received error, we were pushed"); | |
160 | retval = PUT_SUBBUF_PUSHED; | |
161 | goto end_rep; | |
162 | } | |
163 | ||
164 | end_rep: | |
165 | if(rep_code) | |
166 | free(rep_code); | |
167 | ||
168 | end: | |
169 | if(send_msg) | |
170 | free(send_msg); | |
171 | if(received_msg) | |
172 | free(received_msg); | |
173 | ||
174 | return retval; | |
175 | } | |
176 | ||
177 | void decrement_active_buffers(void *arg) | |
178 | { | |
179 | struct libustd_instance *instance = arg; | |
180 | pthread_mutex_lock(&instance->mutex); | |
181 | instance->active_buffers--; | |
182 | pthread_mutex_unlock(&instance->mutex); | |
183 | } | |
184 | ||
185 | struct buffer_info *connect_buffer(struct libustd_instance *instance, pid_t pid, const char *bufname) | |
186 | { | |
187 | struct buffer_info *buf; | |
188 | char *send_msg; | |
189 | char *received_msg; | |
190 | int result; | |
191 | char *tmp; | |
192 | int fd; | |
193 | struct shmid_ds shmds; | |
194 | ||
195 | buf = (struct buffer_info *) malloc(sizeof(struct buffer_info)); | |
196 | if(buf == NULL) { | |
197 | ERR("add_buffer: insufficient memory"); | |
198 | return NULL; | |
199 | } | |
200 | ||
201 | buf->name = bufname; | |
202 | buf->pid = pid; | |
203 | ||
204 | /* connect to app */ | |
205 | result = ustcomm_connect_app(buf->pid, &buf->conn); | |
206 | if(result) { | |
207 | WARN("unable to connect to process, it probably died before we were able to connect"); | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | /* get pidunique */ | |
212 | asprintf(&send_msg, "get_pidunique"); | |
213 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); | |
214 | free(send_msg); | |
215 | if(result == -1) { | |
216 | ERR("problem in ustcomm_send_request(get_pidunique)"); | |
217 | return NULL; | |
218 | } | |
219 | if(result == 0) { | |
220 | goto error; | |
221 | } | |
222 | ||
223 | result = sscanf(received_msg, "%lld", &buf->pidunique); | |
224 | if(result != 1) { | |
225 | ERR("unable to parse response to get_pidunique"); | |
226 | return NULL; | |
227 | } | |
228 | free(received_msg); | |
229 | DBG("got pidunique %lld", buf->pidunique); | |
230 | ||
231 | /* get shmid */ | |
232 | asprintf(&send_msg, "get_shmid %s", buf->name); | |
233 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); | |
234 | free(send_msg); | |
235 | if(result == -1) { | |
236 | ERR("problem in ustcomm_send_request(get_shmid)"); | |
237 | return NULL; | |
238 | } | |
239 | if(result == 0) { | |
240 | goto error; | |
241 | } | |
242 | ||
243 | result = sscanf(received_msg, "%d %d", &buf->shmid, &buf->bufstruct_shmid); | |
244 | if(result != 2) { | |
245 | ERR("unable to parse response to get_shmid (\"%s\")", received_msg); | |
246 | return NULL; | |
247 | } | |
248 | free(received_msg); | |
249 | DBG("got shmids %d %d", buf->shmid, buf->bufstruct_shmid); | |
250 | ||
251 | /* get n_subbufs */ | |
252 | asprintf(&send_msg, "get_n_subbufs %s", buf->name); | |
253 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); | |
254 | free(send_msg); | |
255 | if(result == -1) { | |
256 | ERR("problem in ustcomm_send_request(g_n_subbufs)"); | |
257 | return NULL; | |
258 | } | |
259 | if(result == 0) { | |
260 | goto error; | |
261 | } | |
262 | ||
263 | result = sscanf(received_msg, "%d", &buf->n_subbufs); | |
264 | if(result != 1) { | |
265 | ERR("unable to parse response to get_n_subbufs"); | |
266 | return NULL; | |
267 | } | |
268 | free(received_msg); | |
269 | DBG("got n_subbufs %d", buf->n_subbufs); | |
270 | ||
271 | /* get subbuf size */ | |
272 | asprintf(&send_msg, "get_subbuf_size %s", buf->name); | |
273 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); | |
274 | free(send_msg); | |
275 | if(result == -1) { | |
276 | ERR("problem in ustcomm_send_request(get_subbuf_size)"); | |
277 | return NULL; | |
278 | } | |
279 | if(result == 0) { | |
280 | goto error; | |
281 | } | |
282 | ||
283 | result = sscanf(received_msg, "%d", &buf->subbuf_size); | |
284 | if(result != 1) { | |
285 | ERR("unable to parse response to get_subbuf_size"); | |
286 | return NULL; | |
287 | } | |
288 | free(received_msg); | |
289 | DBG("got subbuf_size %d", buf->subbuf_size); | |
290 | ||
291 | /* attach memory */ | |
292 | buf->mem = shmat(buf->shmid, NULL, 0); | |
293 | if(buf->mem == (void *) 0) { | |
294 | PERROR("shmat"); | |
295 | return NULL; | |
296 | } | |
297 | DBG("successfully attached buffer memory"); | |
298 | ||
299 | buf->bufstruct_mem = shmat(buf->bufstruct_shmid, NULL, 0); | |
300 | if(buf->bufstruct_mem == (void *) 0) { | |
301 | PERROR("shmat"); | |
302 | return NULL; | |
303 | } | |
304 | DBG("successfully attached buffer bufstruct memory"); | |
305 | ||
306 | /* obtain info on the memory segment */ | |
307 | result = shmctl(buf->shmid, IPC_STAT, &shmds); | |
308 | if(result == -1) { | |
309 | PERROR("shmctl"); | |
310 | return NULL; | |
311 | } | |
312 | buf->memlen = shmds.shm_segsz; | |
313 | ||
314 | if(instance->callbacks->on_open_buffer) | |
315 | instance->callbacks->on_open_buffer(instance->callbacks, buf); | |
316 | ||
317 | pthread_mutex_lock(&instance->mutex); | |
318 | instance->active_buffers++; | |
319 | pthread_mutex_unlock(&instance->mutex); | |
320 | ||
321 | return buf; | |
322 | ||
323 | error: | |
324 | free(buf); | |
325 | return NULL; | |
326 | } | |
327 | ||
328 | static void destroy_buffer(struct libustd_callbacks *callbacks, | |
329 | struct buffer_info *buf) | |
330 | { | |
331 | int result; | |
332 | ||
333 | result = ustcomm_close_app(&buf->conn); | |
334 | if(result == -1) { | |
335 | WARN("problem calling ustcomm_close_app"); | |
336 | } | |
337 | ||
338 | result = shmdt(buf->mem); | |
339 | if(result == -1) { | |
340 | PERROR("shmdt"); | |
341 | } | |
342 | ||
343 | result = shmdt(buf->bufstruct_mem); | |
344 | if(result == -1) { | |
345 | PERROR("shmdt"); | |
346 | } | |
347 | ||
348 | if(callbacks->on_close_buffer) | |
349 | callbacks->on_close_buffer(callbacks, buf); | |
350 | ||
351 | free(buf); | |
352 | } | |
353 | ||
354 | int consumer_loop(struct libustd_instance *instance, struct buffer_info *buf) | |
355 | { | |
356 | int result; | |
357 | ||
358 | pthread_cleanup_push(decrement_active_buffers, instance); | |
359 | ||
360 | for(;;) { | |
361 | /* get the subbuffer */ | |
362 | result = get_subbuffer(buf); | |
363 | if(result == -1) { | |
364 | ERR("error getting subbuffer"); | |
365 | continue; | |
366 | } | |
367 | else if(result == GET_SUBBUF_DONE) { | |
368 | /* this is done */ | |
369 | break; | |
370 | } | |
371 | else if(result == GET_SUBBUF_DIED) { | |
372 | finish_consuming_dead_subbuffer(instance->callbacks, buf); | |
373 | break; | |
374 | } | |
375 | ||
376 | if(instance->callbacks->on_read_subbuffer) | |
377 | instance->callbacks->on_read_subbuffer(instance->callbacks, buf); | |
378 | ||
379 | /* put the subbuffer */ | |
380 | result = put_subbuffer(buf); | |
381 | if(result == -1) { | |
382 | ERR("unknown error putting subbuffer (channel=%s)", buf->name); | |
383 | break; | |
384 | } | |
385 | else if(result == PUT_SUBBUF_PUSHED) { | |
386 | ERR("Buffer overflow (channel=%s), reader pushed. This channel will not be usable passed this point.", buf->name); | |
387 | break; | |
388 | } | |
389 | else if(result == PUT_SUBBUF_DIED) { | |
390 | DBG("application died while putting subbuffer"); | |
391 | /* Skip the first subbuffer. We are not sure it is trustable | |
392 | * because the put_subbuffer() did not complete. | |
393 | */ | |
394 | if(instance->callbacks->on_put_error) | |
395 | instance->callbacks->on_put_error(instance->callbacks, buf); | |
396 | ||
397 | finish_consuming_dead_subbuffer(instance->callbacks, buf); | |
398 | break; | |
399 | } | |
400 | else if(result == PUT_SUBBUF_DONE) { | |
401 | /* Done with this subbuffer */ | |
402 | /* FIXME: add a case where this branch is used? Upon | |
403 | * normal trace termination, at put_subbuf time, a | |
404 | * special last-subbuffer code could be returned by | |
405 | * the listener. | |
406 | */ | |
407 | break; | |
408 | } | |
409 | else if(result == PUT_SUBBUF_OK) { | |
410 | } | |
411 | } | |
412 | ||
413 | DBG("thread for buffer %s is stopping", buf->name); | |
414 | ||
415 | /* FIXME: destroy, unalloc... */ | |
416 | ||
417 | pthread_cleanup_pop(1); | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
422 | struct consumer_thread_args { | |
423 | pid_t pid; | |
424 | const char *bufname; | |
425 | struct libustd_instance *instance; | |
426 | }; | |
427 | ||
428 | void *consumer_thread(void *arg) | |
429 | { | |
430 | struct buffer_info *buf; | |
431 | struct consumer_thread_args *args = (struct consumer_thread_args *) arg; | |
432 | int result; | |
433 | sigset_t sigset; | |
434 | ||
435 | DBG("GOT ARGS: pid %d bufname %s", args->pid, args->bufname); | |
436 | ||
437 | if(args->instance->callbacks->on_new_thread) | |
438 | args->instance->callbacks->on_new_thread(args->instance->callbacks); | |
439 | ||
440 | /* Block signals that should be handled by the main thread. */ | |
441 | result = sigemptyset(&sigset); | |
442 | if(result == -1) { | |
443 | PERROR("sigemptyset"); | |
444 | goto end; | |
445 | } | |
446 | result = sigaddset(&sigset, SIGTERM); | |
447 | if(result == -1) { | |
448 | PERROR("sigaddset"); | |
449 | goto end; | |
450 | } | |
451 | result = sigaddset(&sigset, SIGINT); | |
452 | if(result == -1) { | |
453 | PERROR("sigaddset"); | |
454 | goto end; | |
455 | } | |
456 | result = sigprocmask(SIG_BLOCK, &sigset, NULL); | |
457 | if(result == -1) { | |
458 | PERROR("sigprocmask"); | |
459 | goto end; | |
460 | } | |
461 | ||
462 | buf = connect_buffer(args->instance, args->pid, args->bufname); | |
463 | if(buf == NULL) { | |
464 | ERR("failed to connect to buffer"); | |
465 | goto end; | |
466 | } | |
467 | ||
468 | consumer_loop(args->instance, buf); | |
469 | ||
470 | destroy_buffer(args->instance->callbacks, buf); | |
471 | ||
472 | end: | |
473 | ||
474 | if(args->instance->callbacks->on_close_thread) | |
475 | args->instance->callbacks->on_close_thread(args->instance->callbacks); | |
476 | ||
477 | free((void *)args->bufname); | |
478 | free(args); | |
479 | return NULL; | |
480 | } | |
481 | ||
482 | int start_consuming_buffer( | |
483 | struct libustd_instance *instance, pid_t pid, const char *bufname) | |
484 | { | |
485 | pthread_t thr; | |
486 | struct consumer_thread_args *args; | |
487 | int result; | |
488 | ||
489 | DBG("beginning of start_consuming_buffer: args: pid %d bufname %s", pid, bufname); | |
490 | ||
491 | args = (struct consumer_thread_args *) malloc(sizeof(struct consumer_thread_args)); | |
492 | ||
493 | args->pid = pid; | |
494 | args->bufname = strdup(bufname); | |
495 | args->instance = instance; | |
496 | DBG("beginning2 of start_consuming_buffer: args: pid %d bufname %s", args->pid, args->bufname); | |
497 | ||
498 | result = pthread_create(&thr, NULL, consumer_thread, args); | |
499 | if(result == -1) { | |
500 | ERR("pthread_create failed"); | |
501 | return -1; | |
502 | } | |
503 | result = pthread_detach(thr); | |
504 | if(result == -1) { | |
505 | ERR("pthread_detach failed"); | |
506 | return -1; | |
507 | } | |
508 | DBG("end of start_consuming_buffer: args: pid %d bufname %s", args->pid, args->bufname); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | int libustd_start_instance(struct libustd_instance *instance) | |
514 | { | |
515 | int result; | |
516 | int timeout = -1; | |
517 | ||
518 | if(!instance->is_init) { | |
519 | ERR("libustd instance not initialized"); | |
520 | return 1; | |
521 | } | |
522 | ||
523 | /* app loop */ | |
524 | for(;;) { | |
525 | char *recvbuf; | |
526 | ||
527 | /* check for requests on our public socket */ | |
528 | result = ustcomm_ustd_recv_message(&instance->comm, &recvbuf, NULL, timeout); | |
529 | if(result == -1 && errno == EINTR) { | |
530 | /* Caught signal */ | |
531 | } | |
532 | else if(result == -1) { | |
533 | ERR("error in ustcomm_ustd_recv_message"); | |
534 | goto loop_end; | |
535 | } | |
536 | else if(result > 0) { | |
537 | if(!strncmp(recvbuf, "collect", 7)) { | |
538 | pid_t pid; | |
539 | char *bufname; | |
540 | int result; | |
541 | ||
542 | result = sscanf(recvbuf, "%*s %d %50as", &pid, &bufname); | |
543 | if(result != 2) { | |
544 | ERR("parsing error: %s", recvbuf); | |
545 | goto free_bufname; | |
546 | } | |
547 | ||
548 | result = start_consuming_buffer(instance, pid, bufname); | |
549 | if(result < 0) { | |
550 | ERR("error in add_buffer"); | |
551 | goto free_bufname; | |
552 | } | |
553 | ||
554 | free_bufname: | |
555 | free(bufname); | |
556 | } | |
557 | else if(!strncmp(recvbuf, "exit", 4)) { | |
558 | /* Only there to force poll to return */ | |
559 | } | |
560 | else { | |
561 | WARN("unknown command: %s", recvbuf); | |
562 | } | |
563 | ||
564 | free(recvbuf); | |
565 | } | |
566 | ||
567 | loop_end: | |
568 | ||
569 | if(instance->quit_program) { | |
570 | pthread_mutex_lock(&instance->mutex); | |
571 | if(instance->active_buffers == 0) { | |
572 | pthread_mutex_unlock(&instance->mutex); | |
573 | break; | |
574 | } | |
575 | pthread_mutex_unlock(&instance->mutex); | |
576 | timeout = 100; | |
577 | } | |
578 | } | |
579 | ||
580 | if(instance->callbacks->on_trace_end) | |
581 | instance->callbacks->on_trace_end(instance); | |
582 | ||
583 | libustd_delete_instance(instance); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | void libustd_delete_instance(struct libustd_instance *instance) | |
589 | { | |
590 | if(instance->is_init) | |
591 | ustcomm_fini_ustd(&instance->comm); | |
592 | ||
593 | pthread_mutex_destroy(&instance->mutex); | |
594 | free(instance->sock_path); | |
595 | free(instance); | |
596 | } | |
597 | ||
598 | int libustd_stop_instance(struct libustd_instance *instance, int send_msg) | |
599 | { | |
600 | int result; | |
601 | int fd; | |
602 | int bytes = 0; | |
603 | ||
604 | char msg[] = "exit"; | |
605 | ||
606 | instance->quit_program = 1; | |
607 | ||
608 | if(!send_msg) | |
609 | return 0; | |
610 | ||
611 | /* Send a message through the socket to force poll to return */ | |
612 | ||
613 | struct sockaddr_un addr; | |
614 | ||
615 | result = fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
616 | if(result == -1) { | |
617 | PERROR("socket"); | |
618 | return 1; | |
619 | } | |
620 | ||
621 | addr.sun_family = AF_UNIX; | |
622 | ||
623 | strncpy(addr.sun_path, instance->sock_path, UNIX_PATH_MAX); | |
624 | addr.sun_path[UNIX_PATH_MAX-1] = '\0'; | |
625 | ||
626 | result = connect(fd, (struct sockaddr *)&addr, sizeof(addr)); | |
627 | if(result == -1) { | |
628 | PERROR("connect"); | |
629 | } | |
630 | ||
631 | while(bytes != sizeof(msg)) | |
632 | bytes += send(fd, msg, sizeof(msg), 0); | |
633 | ||
634 | close(fd); | |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
639 | struct libustd_instance *libustd_new_instance( | |
640 | struct libustd_callbacks *callbacks, char *sock_path) | |
641 | { | |
642 | struct libustd_instance *instance = | |
643 | malloc(sizeof(struct libustd_instance)); | |
644 | if(!instance) | |
645 | return NULL; | |
646 | ||
647 | instance->callbacks = callbacks; | |
648 | instance->quit_program = 0; | |
649 | instance->is_init = 0; | |
650 | instance->active_buffers = 0; | |
651 | pthread_mutex_init(&instance->mutex, NULL); | |
652 | ||
653 | if(sock_path) | |
654 | instance->sock_path = strdup(sock_path); | |
655 | else | |
656 | instance->sock_path = NULL; | |
657 | ||
658 | return instance; | |
659 | } | |
660 | ||
661 | int libustd_init_instance(struct libustd_instance *instance) | |
662 | { | |
663 | int result; | |
664 | result = ustcomm_init_ustd(&instance->comm, instance->sock_path); | |
665 | if(result == -1) { | |
666 | ERR("failed to initialize socket"); | |
667 | return 1; | |
668 | } | |
669 | instance->is_init = 1; | |
670 | return 0; | |
671 | } | |
672 |