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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <unistd.h> | |
23 | #include <string.h> | |
24 | #include <glib.h> | |
25 | #include "libsigrok.h" | |
26 | #include "libsigrok-internal.h" | |
27 | ||
28 | /** | |
29 | * @file | |
30 | * | |
31 | * Creating, using, or destroying libsigrok sessions. | |
32 | */ | |
33 | ||
34 | /** | |
35 | * @defgroup grp_session Session handling | |
36 | * | |
37 | * Creating, using, or destroying libsigrok sessions. | |
38 | * | |
39 | * @{ | |
40 | */ | |
41 | ||
42 | struct source { | |
43 | int timeout; | |
44 | sr_receive_data_callback_t cb; | |
45 | void *cb_data; | |
46 | ||
47 | /* This is used to keep track of the object (fd, pollfd or channel) which is | |
48 | * being polled and will be used to match the source when removing it again. | |
49 | */ | |
50 | gintptr poll_object; | |
51 | }; | |
52 | ||
53 | /* There can only be one session at a time. */ | |
54 | /* 'session' is not static, it's used elsewhere (via 'extern'). */ | |
55 | struct sr_session *session; | |
56 | ||
57 | /** | |
58 | * Create a new session. | |
59 | * | |
60 | * @todo Should it use the file-global "session" variable or take an argument? | |
61 | * The same question applies to all the other session functions. | |
62 | * | |
63 | * @return A pointer to the newly allocated session, or NULL upon errors. | |
64 | */ | |
65 | SR_API struct sr_session *sr_session_new(void) | |
66 | { | |
67 | if (!(session = g_try_malloc0(sizeof(struct sr_session)))) { | |
68 | sr_err("session: %s: session malloc failed", __func__); | |
69 | return NULL; /* TODO: SR_ERR_MALLOC? */ | |
70 | } | |
71 | ||
72 | session->source_timeout = -1; | |
73 | ||
74 | return session; | |
75 | } | |
76 | ||
77 | /** | |
78 | * Destroy the current session. | |
79 | * | |
80 | * This frees up all memory used by the session. | |
81 | * | |
82 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
83 | */ | |
84 | SR_API int sr_session_destroy(void) | |
85 | { | |
86 | if (!session) { | |
87 | sr_err("session: %s: session was NULL", __func__); | |
88 | return SR_ERR_BUG; | |
89 | } | |
90 | ||
91 | sr_session_dev_remove_all(); | |
92 | ||
93 | /* TODO: Error checks needed? */ | |
94 | ||
95 | g_free(session); | |
96 | session = NULL; | |
97 | ||
98 | return SR_OK; | |
99 | } | |
100 | ||
101 | static void sr_dev_close(struct sr_dev_inst *sdi) | |
102 | { | |
103 | if (sdi->driver && sdi->driver->dev_close) | |
104 | sdi->driver->dev_close(sdi); | |
105 | } | |
106 | ||
107 | /** | |
108 | * Remove all the devices from the current session. | |
109 | * | |
110 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
111 | * exists after this function returns. | |
112 | * | |
113 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
114 | */ | |
115 | SR_API int sr_session_dev_remove_all(void) | |
116 | { | |
117 | if (!session) { | |
118 | sr_err("session: %s: session was NULL", __func__); | |
119 | return SR_ERR_BUG; | |
120 | } | |
121 | ||
122 | g_slist_free_full(session->devs, (GDestroyNotify)sr_dev_close); | |
123 | session->devs = NULL; | |
124 | ||
125 | return SR_OK; | |
126 | } | |
127 | ||
128 | /** | |
129 | * Add a device instance to the current session. | |
130 | * | |
131 | * @param sdi The device instance to add to the current session. Must not | |
132 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must | |
133 | * not be NULL. | |
134 | * | |
135 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
136 | */ | |
137 | SR_API int sr_session_dev_add(const struct sr_dev_inst *sdi) | |
138 | { | |
139 | int ret; | |
140 | ||
141 | if (!sdi) { | |
142 | sr_err("session: %s: sdi was NULL", __func__); | |
143 | return SR_ERR_ARG; | |
144 | } | |
145 | ||
146 | if (!session) { | |
147 | sr_err("session: %s: session was NULL", __func__); | |
148 | return SR_ERR_BUG; | |
149 | } | |
150 | ||
151 | /* If sdi->driver is NULL, this is a virtual device. */ | |
152 | if (!sdi->driver) { | |
153 | sr_dbg("session: %s: sdi->driver was NULL, this seems to be " | |
154 | "a virtual device; continuing", __func__); | |
155 | /* Just add the device, don't run dev_open(). */ | |
156 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
157 | return SR_OK; | |
158 | } | |
159 | ||
160 | /* sdi->driver is non-NULL (i.e. we have a real device). */ | |
161 | if (!sdi->driver->dev_open) { | |
162 | sr_err("session: %s: sdi->driver->dev_open was NULL", __func__); | |
163 | return SR_ERR_BUG; | |
164 | } | |
165 | ||
166 | if ((ret = sdi->driver->dev_open((struct sr_dev_inst *)sdi)) != SR_OK) { | |
167 | sr_err("session: %s: dev_open failed (%d)", __func__, ret); | |
168 | return ret; | |
169 | } | |
170 | ||
171 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
172 | ||
173 | return SR_OK; | |
174 | } | |
175 | ||
176 | /** | |
177 | * Remove all datafeed callbacks in the current session. | |
178 | * | |
179 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
180 | */ | |
181 | SR_API int sr_session_datafeed_callback_remove_all(void) | |
182 | { | |
183 | if (!session) { | |
184 | sr_err("session: %s: session was NULL", __func__); | |
185 | return SR_ERR_BUG; | |
186 | } | |
187 | ||
188 | g_slist_free(session->datafeed_callbacks); | |
189 | session->datafeed_callbacks = NULL; | |
190 | ||
191 | return SR_OK; | |
192 | } | |
193 | ||
194 | /** | |
195 | * Add a datafeed callback to the current session. | |
196 | * | |
197 | * @param cb Function to call when a chunk of data is received. | |
198 | * Must not be NULL. | |
199 | * | |
200 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
201 | */ | |
202 | SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb) | |
203 | { | |
204 | if (!session) { | |
205 | sr_err("session: %s: session was NULL", __func__); | |
206 | return SR_ERR_BUG; | |
207 | } | |
208 | ||
209 | if (!cb) { | |
210 | sr_err("session: %s: cb was NULL", __func__); | |
211 | return SR_ERR_ARG; | |
212 | } | |
213 | ||
214 | session->datafeed_callbacks = | |
215 | g_slist_append(session->datafeed_callbacks, cb); | |
216 | ||
217 | return SR_OK; | |
218 | } | |
219 | ||
220 | static int sr_session_run_poll(void) | |
221 | { | |
222 | unsigned int i; | |
223 | int ret; | |
224 | ||
225 | while (session->num_sources > 0) { | |
226 | ret = g_poll(session->pollfds, session->num_sources, | |
227 | session->source_timeout); | |
228 | for (i = 0; i < session->num_sources; i++) { | |
229 | if (session->pollfds[i].revents > 0 || (ret == 0 | |
230 | && session->source_timeout == session->sources[i].timeout)) { | |
231 | /* | |
232 | * Invoke the source's callback on an event, | |
233 | * or if the poll timed out and this source | |
234 | * asked for that timeout. | |
235 | */ | |
236 | if (!session->sources[i].cb(session->pollfds[i].fd, | |
237 | session->pollfds[i].revents, | |
238 | session->sources[i].cb_data)) | |
239 | sr_session_source_remove(session->sources[i].poll_object); | |
240 | } | |
241 | } | |
242 | } | |
243 | ||
244 | return SR_OK; | |
245 | } | |
246 | ||
247 | /** | |
248 | * Start a session. | |
249 | * | |
250 | * There can only be one session at a time. | |
251 | * | |
252 | * @return SR_OK upon success, SR_ERR upon errors. | |
253 | */ | |
254 | SR_API int sr_session_start(void) | |
255 | { | |
256 | struct sr_dev_inst *sdi; | |
257 | GSList *l; | |
258 | int ret; | |
259 | ||
260 | if (!session) { | |
261 | sr_err("session: %s: session was NULL; a session must be " | |
262 | "created before starting it.", __func__); | |
263 | return SR_ERR_BUG; | |
264 | } | |
265 | ||
266 | if (!session->devs) { | |
267 | sr_err("session: %s: session->devs was NULL; a session " | |
268 | "cannot be started without devices.", __func__); | |
269 | return SR_ERR_BUG; | |
270 | } | |
271 | ||
272 | sr_info("session: starting"); | |
273 | ||
274 | for (l = session->devs; l; l = l->next) { | |
275 | sdi = l->data; | |
276 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
277 | sr_err("session: %s: could not start an acquisition " | |
278 | "(%d)", __func__, ret); | |
279 | break; | |
280 | } | |
281 | } | |
282 | ||
283 | /* TODO: What if there are multiple devices? Which return code? */ | |
284 | ||
285 | return ret; | |
286 | } | |
287 | ||
288 | /** | |
289 | * Run the session. | |
290 | * | |
291 | * @return SR_OK upon success, SR_ERR_BUG upon errors. | |
292 | */ | |
293 | SR_API int sr_session_run(void) | |
294 | { | |
295 | if (!session) { | |
296 | sr_err("session: %s: session was NULL; a session must be " | |
297 | "created first, before running it.", __func__); | |
298 | return SR_ERR_BUG; | |
299 | } | |
300 | ||
301 | if (!session->devs) { | |
302 | /* TODO: Actually the case? */ | |
303 | sr_err("session: %s: session->devs was NULL; a session " | |
304 | "cannot be run without devices.", __func__); | |
305 | return SR_ERR_BUG; | |
306 | } | |
307 | ||
308 | sr_info("session: running"); | |
309 | ||
310 | /* Do we have real sources? */ | |
311 | if (session->num_sources == 1 && session->pollfds[0].fd == -1) { | |
312 | /* Dummy source, freewheel over it. */ | |
313 | while (session->num_sources) | |
314 | session->sources[0].cb(-1, 0, session->sources[0].cb_data); | |
315 | } else { | |
316 | /* Real sources, use g_poll() main loop. */ | |
317 | sr_session_run_poll(); | |
318 | } | |
319 | ||
320 | return SR_OK; | |
321 | } | |
322 | ||
323 | /** | |
324 | * Halt the current session. | |
325 | * | |
326 | * This function is deprecated and should not be used in new code, use | |
327 | * sr_session_stop() instead. The behaviour of this function is identical to | |
328 | * sr_session_stop(). | |
329 | * | |
330 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
331 | */ | |
332 | SR_API int sr_session_halt(void) | |
333 | { | |
334 | return sr_session_stop(); | |
335 | } | |
336 | ||
337 | /** | |
338 | * Stop the current session. | |
339 | * | |
340 | * The current session is stopped immediately, with all acquisition sessions | |
341 | * being stopped and hardware drivers cleaned up. | |
342 | * | |
343 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
344 | */ | |
345 | SR_API int sr_session_stop(void) | |
346 | { | |
347 | struct sr_dev_inst *sdi; | |
348 | GSList *l; | |
349 | ||
350 | if (!session) { | |
351 | sr_err("session: %s: session was NULL", __func__); | |
352 | return SR_ERR_BUG; | |
353 | } | |
354 | ||
355 | sr_info("session: stopping"); | |
356 | ||
357 | for (l = session->devs; l; l = l->next) { | |
358 | sdi = l->data; | |
359 | if (sdi->driver) { | |
360 | if (sdi->driver->dev_acquisition_stop) | |
361 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
362 | } | |
363 | } | |
364 | ||
365 | /* | |
366 | * Some sources may not be necessarily associated with a device. | |
367 | * Those sources may still be present even after stopping all devices. | |
368 | * We need to make sure all sources are removed, or we risk running the | |
369 | * session in an infinite loop. | |
370 | */ | |
371 | while (session->num_sources) | |
372 | sr_session_source_remove(session->sources[0].poll_object); | |
373 | ||
374 | return SR_OK; | |
375 | } | |
376 | ||
377 | /** | |
378 | * Debug helper. | |
379 | * | |
380 | * @param packet The packet to show debugging information for. | |
381 | */ | |
382 | static void datafeed_dump(const struct sr_datafeed_packet *packet) | |
383 | { | |
384 | const struct sr_datafeed_logic *logic; | |
385 | const struct sr_datafeed_analog *analog; | |
386 | ||
387 | switch (packet->type) { | |
388 | case SR_DF_HEADER: | |
389 | sr_dbg("bus: received SR_DF_HEADER"); | |
390 | break; | |
391 | case SR_DF_TRIGGER: | |
392 | sr_dbg("bus: received SR_DF_TRIGGER"); | |
393 | break; | |
394 | case SR_DF_META_LOGIC: | |
395 | sr_dbg("bus: received SR_DF_META_LOGIC"); | |
396 | break; | |
397 | case SR_DF_LOGIC: | |
398 | logic = packet->payload; | |
399 | /* TODO: Check for logic != NULL. */ | |
400 | sr_dbg("bus: received SR_DF_LOGIC %" PRIu64 " bytes", logic->length); | |
401 | break; | |
402 | case SR_DF_META_ANALOG: | |
403 | sr_dbg("bus: received SR_DF_META_ANALOG"); | |
404 | break; | |
405 | case SR_DF_ANALOG: | |
406 | analog = packet->payload; | |
407 | /* TODO: Check for analog != NULL. */ | |
408 | sr_dbg("bus: received SR_DF_ANALOG %d samples", analog->num_samples); | |
409 | break; | |
410 | case SR_DF_END: | |
411 | sr_dbg("bus: received SR_DF_END"); | |
412 | break; | |
413 | case SR_DF_FRAME_BEGIN: | |
414 | sr_dbg("bus: received SR_DF_FRAME_BEGIN"); | |
415 | break; | |
416 | case SR_DF_FRAME_END: | |
417 | sr_dbg("bus: received SR_DF_FRAME_END"); | |
418 | break; | |
419 | default: | |
420 | sr_dbg("bus: received unknown packet type %d", packet->type); | |
421 | break; | |
422 | } | |
423 | } | |
424 | ||
425 | /** | |
426 | * Send a packet to whatever is listening on the datafeed bus. | |
427 | * | |
428 | * Hardware drivers use this to send a data packet to the frontend. | |
429 | * | |
430 | * @param sdi TODO. | |
431 | * @param packet The datafeed packet to send to the session bus. | |
432 | * | |
433 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
434 | * | |
435 | * @private | |
436 | */ | |
437 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, | |
438 | const struct sr_datafeed_packet *packet) | |
439 | { | |
440 | GSList *l; | |
441 | sr_datafeed_callback_t cb; | |
442 | ||
443 | if (!sdi) { | |
444 | sr_err("session: %s: sdi was NULL", __func__); | |
445 | return SR_ERR_ARG; | |
446 | } | |
447 | ||
448 | if (!packet) { | |
449 | sr_err("session: %s: packet was NULL", __func__); | |
450 | return SR_ERR_ARG; | |
451 | } | |
452 | ||
453 | for (l = session->datafeed_callbacks; l; l = l->next) { | |
454 | if (sr_log_loglevel_get() >= SR_LOG_DBG) | |
455 | datafeed_dump(packet); | |
456 | cb = l->data; | |
457 | cb(sdi, packet); | |
458 | } | |
459 | ||
460 | return SR_OK; | |
461 | } | |
462 | ||
463 | /** | |
464 | * Add an event source for a file descriptor. | |
465 | * | |
466 | * @param pollfd The GPollFD. | |
467 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
468 | * @param cb Callback function to add. Must not be NULL. | |
469 | * @param cb_data Data for the callback function. Can be NULL. | |
470 | * @param poll_object TODO. | |
471 | * | |
472 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
473 | * SR_ERR_MALLOC upon memory allocation errors. | |
474 | */ | |
475 | static int _sr_session_source_add(GPollFD *pollfd, int timeout, | |
476 | sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object) | |
477 | { | |
478 | struct source *new_sources, *s; | |
479 | GPollFD *new_pollfds; | |
480 | ||
481 | if (!cb) { | |
482 | sr_err("session: %s: cb was NULL", __func__); | |
483 | return SR_ERR_ARG; | |
484 | } | |
485 | ||
486 | /* Note: cb_data can be NULL, that's not a bug. */ | |
487 | ||
488 | new_pollfds = g_try_realloc(session->pollfds, | |
489 | sizeof(GPollFD) * (session->num_sources + 1)); | |
490 | if (!new_pollfds) { | |
491 | sr_err("session: %s: new_pollfds malloc failed", __func__); | |
492 | return SR_ERR_MALLOC; | |
493 | } | |
494 | ||
495 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * | |
496 | (session->num_sources + 1)); | |
497 | if (!new_sources) { | |
498 | sr_err("session: %s: new_sources malloc failed", __func__); | |
499 | return SR_ERR_MALLOC; | |
500 | } | |
501 | ||
502 | new_pollfds[session->num_sources] = *pollfd; | |
503 | s = &new_sources[session->num_sources++]; | |
504 | s->timeout = timeout; | |
505 | s->cb = cb; | |
506 | s->cb_data = cb_data; | |
507 | s->poll_object = poll_object; | |
508 | session->pollfds = new_pollfds; | |
509 | session->sources = new_sources; | |
510 | ||
511 | if (timeout != session->source_timeout && timeout > 0 | |
512 | && (session->source_timeout == -1 || timeout < session->source_timeout)) | |
513 | session->source_timeout = timeout; | |
514 | ||
515 | return SR_OK; | |
516 | } | |
517 | ||
518 | /** | |
519 | * Add an event source for a file descriptor. | |
520 | * | |
521 | * @param fd The file descriptor. | |
522 | * @param events Events to check for. | |
523 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
524 | * @param cb Callback function to add. Must not be NULL. | |
525 | * @param cb_data Data for the callback function. Can be NULL. | |
526 | * | |
527 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
528 | * SR_ERR_MALLOC upon memory allocation errors. | |
529 | */ | |
530 | SR_API int sr_session_source_add(int fd, int events, int timeout, | |
531 | sr_receive_data_callback_t cb, void *cb_data) | |
532 | { | |
533 | GPollFD p; | |
534 | ||
535 | p.fd = fd; | |
536 | p.events = events; | |
537 | ||
538 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd); | |
539 | } | |
540 | ||
541 | /** | |
542 | * Add an event source for a GPollFD. | |
543 | * | |
544 | * @param pollfd The GPollFD. | |
545 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
546 | * @param cb Callback function to add. Must not be NULL. | |
547 | * @param cb_data Data for the callback function. Can be NULL. | |
548 | * | |
549 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
550 | * SR_ERR_MALLOC upon memory allocation errors. | |
551 | */ | |
552 | SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout, | |
553 | sr_receive_data_callback_t cb, void *cb_data) | |
554 | { | |
555 | return _sr_session_source_add(pollfd, timeout, cb, | |
556 | cb_data, (gintptr)pollfd); | |
557 | } | |
558 | ||
559 | /** | |
560 | * Add an event source for a GIOChannel. | |
561 | * | |
562 | * @param channel The GIOChannel. | |
563 | * @param events Events to poll on. | |
564 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
565 | * @param cb Callback function to add. Must not be NULL. | |
566 | * @param cb_data Data for the callback function. Can be NULL. | |
567 | * | |
568 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
569 | * SR_ERR_MALLOC upon memory allocation errors. | |
570 | */ | |
571 | SR_API int sr_session_source_add_channel(GIOChannel *channel, int events, | |
572 | int timeout, sr_receive_data_callback_t cb, void *cb_data) | |
573 | { | |
574 | GPollFD p; | |
575 | ||
576 | #ifdef _WIN32 | |
577 | g_io_channel_win32_make_pollfd(channel, events, &p); | |
578 | #else | |
579 | p.fd = g_io_channel_unix_get_fd(channel); | |
580 | p.events = events; | |
581 | #endif | |
582 | ||
583 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)channel); | |
584 | } | |
585 | ||
586 | /** | |
587 | * Remove the source belonging to the specified channel. | |
588 | * | |
589 | * @todo Add more error checks and logging. | |
590 | * | |
591 | * @param channel The channel for which the source should be removed. | |
592 | * | |
593 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
594 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
595 | * internal errors. | |
596 | */ | |
597 | static int _sr_session_source_remove(gintptr poll_object) | |
598 | { | |
599 | struct source *new_sources; | |
600 | GPollFD *new_pollfds; | |
601 | unsigned int old; | |
602 | ||
603 | if (!session->sources || !session->num_sources) { | |
604 | sr_err("session: %s: sources was NULL", __func__); | |
605 | return SR_ERR_BUG; | |
606 | } | |
607 | ||
608 | for (old = 0; old < session->num_sources; old++) { | |
609 | if (session->sources[old].poll_object == poll_object) | |
610 | break; | |
611 | } | |
612 | ||
613 | /* fd not found, nothing to do */ | |
614 | if (old == session->num_sources) | |
615 | return SR_OK; | |
616 | ||
617 | session->num_sources -= 1; | |
618 | ||
619 | if (old != session->num_sources) { | |
620 | memmove(&session->pollfds[old], &session->pollfds[old+1], | |
621 | (session->num_sources - old) * sizeof(GPollFD)); | |
622 | memmove(&session->sources[old], &session->sources[old+1], | |
623 | (session->num_sources - old) * sizeof(struct source)); | |
624 | } | |
625 | ||
626 | new_pollfds = g_try_realloc(session->pollfds, sizeof(GPollFD) * session->num_sources); | |
627 | if (!new_pollfds && session->num_sources > 0) { | |
628 | sr_err("session: %s: new_pollfds malloc failed", __func__); | |
629 | return SR_ERR_MALLOC; | |
630 | } | |
631 | ||
632 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * session->num_sources); | |
633 | if (!new_sources && session->num_sources > 0) { | |
634 | sr_err("session: %s: new_sources malloc failed", __func__); | |
635 | return SR_ERR_MALLOC; | |
636 | } | |
637 | ||
638 | session->pollfds = new_pollfds; | |
639 | session->sources = new_sources; | |
640 | ||
641 | return SR_OK; | |
642 | } | |
643 | ||
644 | /** | |
645 | * Remove the source belonging to the specified file descriptor. | |
646 | * | |
647 | * @param fd The file descriptor for which the source should be removed. | |
648 | * | |
649 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
650 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
651 | * internal errors. | |
652 | */ | |
653 | SR_API int sr_session_source_remove(int fd) | |
654 | { | |
655 | return _sr_session_source_remove((gintptr)fd); | |
656 | } | |
657 | ||
658 | /** | |
659 | * Remove the source belonging to the specified poll descriptor. | |
660 | * | |
661 | * @param pollfd The poll descriptor for which the source should be removed. | |
662 | * | |
663 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
664 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
665 | * internal errors. | |
666 | */ | |
667 | SR_API int sr_session_source_remove_pollfd(GPollFD *pollfd) | |
668 | { | |
669 | return _sr_session_source_remove((gintptr)pollfd); | |
670 | } | |
671 | ||
672 | /** | |
673 | * Remove the source belonging to the specified channel. | |
674 | * | |
675 | * @param channel The channel for which the source should be removed. | |
676 | * | |
677 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
678 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
679 | * internal errors. | |
680 | */ | |
681 | SR_API int sr_session_source_remove_channel(GIOChannel *channel) | |
682 | { | |
683 | return _sr_session_source_remove((gintptr)channel); | |
684 | } | |
685 | ||
686 | /** @} */ |