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1 | /* | |
2 | * This file is part of the libsigrok 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 | /* Message logging helpers with subsystem-specific prefix string. */ | |
29 | #define LOG_PREFIX "session: " | |
30 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
31 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
32 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
33 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
34 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
35 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
36 | ||
37 | /** | |
38 | * @file | |
39 | * | |
40 | * Creating, using, or destroying libsigrok sessions. | |
41 | */ | |
42 | ||
43 | /** | |
44 | * @defgroup grp_session Session handling | |
45 | * | |
46 | * Creating, using, or destroying libsigrok sessions. | |
47 | * | |
48 | * @{ | |
49 | */ | |
50 | ||
51 | struct source { | |
52 | int timeout; | |
53 | sr_receive_data_callback_t cb; | |
54 | void *cb_data; | |
55 | ||
56 | /* This is used to keep track of the object (fd, pollfd or channel) which is | |
57 | * being polled and will be used to match the source when removing it again. | |
58 | */ | |
59 | gintptr poll_object; | |
60 | }; | |
61 | ||
62 | struct datafeed_callback { | |
63 | sr_datafeed_callback_t cb; | |
64 | void *cb_data; | |
65 | }; | |
66 | ||
67 | /* There can only be one session at a time. */ | |
68 | /* 'session' is not static, it's used elsewhere (via 'extern'). */ | |
69 | struct sr_session *session; | |
70 | ||
71 | /** | |
72 | * Create a new session. | |
73 | * | |
74 | * @todo Should it use the file-global "session" variable or take an argument? | |
75 | * The same question applies to all the other session functions. | |
76 | * | |
77 | * @return A pointer to the newly allocated session, or NULL upon errors. | |
78 | */ | |
79 | SR_API struct sr_session *sr_session_new(void) | |
80 | { | |
81 | if (!(session = g_try_malloc0(sizeof(struct sr_session)))) { | |
82 | sr_err("Session malloc failed."); | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | session->source_timeout = -1; | |
87 | session->abort_session = FALSE; | |
88 | g_mutex_init(&session->stop_mutex); | |
89 | ||
90 | return session; | |
91 | } | |
92 | ||
93 | /** | |
94 | * Destroy the current session. | |
95 | * | |
96 | * This frees up all memory used by the session. | |
97 | * | |
98 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
99 | */ | |
100 | SR_API int sr_session_destroy(void) | |
101 | { | |
102 | if (!session) { | |
103 | sr_err("%s: session was NULL", __func__); | |
104 | return SR_ERR_BUG; | |
105 | } | |
106 | ||
107 | sr_session_dev_remove_all(); | |
108 | ||
109 | /* TODO: Error checks needed? */ | |
110 | ||
111 | g_mutex_clear(&session->stop_mutex); | |
112 | ||
113 | g_free(session); | |
114 | session = NULL; | |
115 | ||
116 | return SR_OK; | |
117 | } | |
118 | ||
119 | /** | |
120 | * Remove all the devices from the current session. | |
121 | * | |
122 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
123 | * exists after this function returns. | |
124 | * | |
125 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
126 | */ | |
127 | SR_API int sr_session_dev_remove_all(void) | |
128 | { | |
129 | if (!session) { | |
130 | sr_err("%s: session was NULL", __func__); | |
131 | return SR_ERR_BUG; | |
132 | } | |
133 | ||
134 | g_slist_free(session->devs); | |
135 | session->devs = NULL; | |
136 | ||
137 | return SR_OK; | |
138 | } | |
139 | ||
140 | /** | |
141 | * Add a device instance to the current session. | |
142 | * | |
143 | * @param sdi The device instance to add to the current session. Must not | |
144 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must | |
145 | * not be NULL. | |
146 | * | |
147 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
148 | */ | |
149 | SR_API int sr_session_dev_add(const struct sr_dev_inst *sdi) | |
150 | { | |
151 | ||
152 | if (!sdi) { | |
153 | sr_err("%s: sdi was NULL", __func__); | |
154 | return SR_ERR_ARG; | |
155 | } | |
156 | ||
157 | if (!session) { | |
158 | sr_err("%s: session was NULL", __func__); | |
159 | return SR_ERR_BUG; | |
160 | } | |
161 | ||
162 | /* If sdi->driver is NULL, this is a virtual device. */ | |
163 | if (!sdi->driver) { | |
164 | sr_dbg("%s: sdi->driver was NULL, this seems to be " | |
165 | "a virtual device; continuing", __func__); | |
166 | /* Just add the device, don't run dev_open(). */ | |
167 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
168 | return SR_OK; | |
169 | } | |
170 | ||
171 | /* sdi->driver is non-NULL (i.e. we have a real device). */ | |
172 | if (!sdi->driver->dev_open) { | |
173 | sr_err("%s: sdi->driver->dev_open was NULL", __func__); | |
174 | return SR_ERR_BUG; | |
175 | } | |
176 | ||
177 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
178 | ||
179 | return SR_OK; | |
180 | } | |
181 | ||
182 | /** | |
183 | * Remove all datafeed callbacks in the current session. | |
184 | * | |
185 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
186 | */ | |
187 | SR_API int sr_session_datafeed_callback_remove_all(void) | |
188 | { | |
189 | if (!session) { | |
190 | sr_err("%s: session was NULL", __func__); | |
191 | return SR_ERR_BUG; | |
192 | } | |
193 | ||
194 | g_slist_free_full(session->datafeed_callbacks, g_free); | |
195 | session->datafeed_callbacks = NULL; | |
196 | ||
197 | return SR_OK; | |
198 | } | |
199 | ||
200 | /** | |
201 | * Add a datafeed callback to the current session. | |
202 | * | |
203 | * @param cb Function to call when a chunk of data is received. | |
204 | * Must not be NULL. | |
205 | * @param cb_data Opaque pointer passed in by the caller. | |
206 | * | |
207 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
208 | */ | |
209 | SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb, void *cb_data) | |
210 | { | |
211 | struct datafeed_callback *cb_struct; | |
212 | ||
213 | if (!session) { | |
214 | sr_err("%s: session was NULL", __func__); | |
215 | return SR_ERR_BUG; | |
216 | } | |
217 | ||
218 | if (!cb) { | |
219 | sr_err("%s: cb was NULL", __func__); | |
220 | return SR_ERR_ARG; | |
221 | } | |
222 | ||
223 | if (!(cb_struct = g_try_malloc0(sizeof(struct datafeed_callback)))) | |
224 | return SR_ERR_MALLOC; | |
225 | ||
226 | cb_struct->cb = cb; | |
227 | cb_struct->cb_data = cb_data; | |
228 | ||
229 | session->datafeed_callbacks = | |
230 | g_slist_append(session->datafeed_callbacks, cb_struct); | |
231 | ||
232 | return SR_OK; | |
233 | } | |
234 | ||
235 | /** | |
236 | * Call every device in the session's callback. | |
237 | * | |
238 | * For sessions not driven by select loops such as sr_session_run(), | |
239 | * but driven by another scheduler, this can be used to poll the devices | |
240 | * from within that scheduler. | |
241 | * | |
242 | * @param block If TRUE, this call will wait for any of the session's | |
243 | * sources to fire an event on the file descriptors, or | |
244 | * any of their timeouts to activate. In other words, this | |
245 | * can be used as a select loop. | |
246 | * If FALSE, all sources have their callback run, regardless | |
247 | * of file descriptor or timeout status. | |
248 | * | |
249 | * @return SR_OK upon success, SR_ERR on errors. | |
250 | */ | |
251 | static int sr_session_iteration(gboolean block) | |
252 | { | |
253 | unsigned int i; | |
254 | int ret; | |
255 | ||
256 | ret = g_poll(session->pollfds, session->num_sources, | |
257 | block ? session->source_timeout : 0); | |
258 | for (i = 0; i < session->num_sources; i++) { | |
259 | if (session->pollfds[i].revents > 0 || (ret == 0 | |
260 | && session->source_timeout == session->sources[i].timeout)) { | |
261 | /* | |
262 | * Invoke the source's callback on an event, | |
263 | * or if the poll timed out and this source | |
264 | * asked for that timeout. | |
265 | */ | |
266 | if (!session->sources[i].cb(session->pollfds[i].fd, | |
267 | session->pollfds[i].revents, | |
268 | session->sources[i].cb_data)) | |
269 | sr_session_source_remove(session->sources[i].poll_object); | |
270 | } | |
271 | /* | |
272 | * We want to take as little time as possible to stop | |
273 | * the session if we have been told to do so. Therefore, | |
274 | * we check the flag after processing every source, not | |
275 | * just once per main event loop. | |
276 | */ | |
277 | g_mutex_lock(&session->stop_mutex); | |
278 | if (session->abort_session) { | |
279 | sr_session_stop_sync(); | |
280 | /* But once is enough. */ | |
281 | session->abort_session = FALSE; | |
282 | } | |
283 | g_mutex_unlock(&session->stop_mutex); | |
284 | } | |
285 | ||
286 | return SR_OK; | |
287 | } | |
288 | ||
289 | /** | |
290 | * Start a session. | |
291 | * | |
292 | * There can only be one session at a time. | |
293 | * | |
294 | * @return SR_OK upon success, SR_ERR upon errors. | |
295 | */ | |
296 | SR_API int sr_session_start(void) | |
297 | { | |
298 | struct sr_dev_inst *sdi; | |
299 | GSList *l; | |
300 | int ret; | |
301 | ||
302 | if (!session) { | |
303 | sr_err("%s: session was NULL; a session must be " | |
304 | "created before starting it.", __func__); | |
305 | return SR_ERR_BUG; | |
306 | } | |
307 | ||
308 | if (!session->devs) { | |
309 | sr_err("%s: session->devs was NULL; a session " | |
310 | "cannot be started without devices.", __func__); | |
311 | return SR_ERR_BUG; | |
312 | } | |
313 | ||
314 | sr_info("Starting."); | |
315 | ||
316 | ret = SR_OK; | |
317 | for (l = session->devs; l; l = l->next) { | |
318 | sdi = l->data; | |
319 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
320 | sr_err("%s: could not start an acquisition " | |
321 | "(%d)", __func__, ret); | |
322 | break; | |
323 | } | |
324 | } | |
325 | ||
326 | /* TODO: What if there are multiple devices? Which return code? */ | |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
331 | /** | |
332 | * Run the session. | |
333 | * | |
334 | * @return SR_OK upon success, SR_ERR_BUG upon errors. | |
335 | */ | |
336 | SR_API int sr_session_run(void) | |
337 | { | |
338 | if (!session) { | |
339 | sr_err("%s: session was NULL; a session must be " | |
340 | "created first, before running it.", __func__); | |
341 | return SR_ERR_BUG; | |
342 | } | |
343 | ||
344 | if (!session->devs) { | |
345 | /* TODO: Actually the case? */ | |
346 | sr_err("%s: session->devs was NULL; a session " | |
347 | "cannot be run without devices.", __func__); | |
348 | return SR_ERR_BUG; | |
349 | } | |
350 | ||
351 | sr_info("Running."); | |
352 | ||
353 | /* Do we have real sources? */ | |
354 | if (session->num_sources == 1 && session->pollfds[0].fd == -1) { | |
355 | /* Dummy source, freewheel over it. */ | |
356 | while (session->num_sources) | |
357 | session->sources[0].cb(-1, 0, session->sources[0].cb_data); | |
358 | } else { | |
359 | /* Real sources, use g_poll() main loop. */ | |
360 | while (session->num_sources) | |
361 | sr_session_iteration(TRUE); | |
362 | } | |
363 | ||
364 | return SR_OK; | |
365 | } | |
366 | ||
367 | /** | |
368 | * Stop the current session. | |
369 | * | |
370 | * The current session is stopped immediately, with all acquisition sessions | |
371 | * being stopped and hardware drivers cleaned up. | |
372 | * | |
373 | * This must be called from within the session thread, to prevent freeing | |
374 | * resources that the session thread will try to use. | |
375 | * | |
376 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
377 | */ | |
378 | SR_PRIV int sr_session_stop_sync(void) | |
379 | { | |
380 | struct sr_dev_inst *sdi; | |
381 | GSList *l; | |
382 | ||
383 | if (!session) { | |
384 | sr_err("%s: session was NULL", __func__); | |
385 | return SR_ERR_BUG; | |
386 | } | |
387 | ||
388 | sr_info("Stopping."); | |
389 | ||
390 | for (l = session->devs; l; l = l->next) { | |
391 | sdi = l->data; | |
392 | if (sdi->driver) { | |
393 | if (sdi->driver->dev_acquisition_stop) | |
394 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
395 | } | |
396 | } | |
397 | ||
398 | return SR_OK; | |
399 | } | |
400 | ||
401 | /** | |
402 | * Stop the current session. | |
403 | * | |
404 | * The current session is stopped immediately, with all acquisition sessions | |
405 | * being stopped and hardware drivers cleaned up. | |
406 | * | |
407 | * If the session is run in a separate thread, this function will not block | |
408 | * until the session is finished executing. It is the caller's responsibility | |
409 | * to wait for the session thread to return before assuming that the session is | |
410 | * completely decommissioned. | |
411 | * | |
412 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
413 | */ | |
414 | SR_API int sr_session_stop(void) | |
415 | { | |
416 | if (!session) { | |
417 | sr_err("%s: session was NULL", __func__); | |
418 | return SR_ERR_BUG; | |
419 | } | |
420 | ||
421 | g_mutex_lock(&session->stop_mutex); | |
422 | session->abort_session = TRUE; | |
423 | g_mutex_unlock(&session->stop_mutex); | |
424 | ||
425 | return SR_OK; | |
426 | } | |
427 | ||
428 | /** | |
429 | * Debug helper. | |
430 | * | |
431 | * @param packet The packet to show debugging information for. | |
432 | */ | |
433 | static void datafeed_dump(const struct sr_datafeed_packet *packet) | |
434 | { | |
435 | const struct sr_datafeed_logic *logic; | |
436 | const struct sr_datafeed_analog *analog; | |
437 | ||
438 | switch (packet->type) { | |
439 | case SR_DF_HEADER: | |
440 | sr_dbg("bus: Received SR_DF_HEADER packet."); | |
441 | break; | |
442 | case SR_DF_TRIGGER: | |
443 | sr_dbg("bus: Received SR_DF_TRIGGER packet."); | |
444 | break; | |
445 | case SR_DF_META: | |
446 | sr_dbg("bus: Received SR_DF_META packet."); | |
447 | break; | |
448 | case SR_DF_LOGIC: | |
449 | logic = packet->payload; | |
450 | sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes).", | |
451 | logic->length); | |
452 | break; | |
453 | case SR_DF_ANALOG: | |
454 | analog = packet->payload; | |
455 | sr_dbg("bus: Received SR_DF_ANALOG packet (%d samples).", | |
456 | analog->num_samples); | |
457 | break; | |
458 | case SR_DF_END: | |
459 | sr_dbg("bus: Received SR_DF_END packet."); | |
460 | break; | |
461 | case SR_DF_FRAME_BEGIN: | |
462 | sr_dbg("bus: Received SR_DF_FRAME_BEGIN packet."); | |
463 | break; | |
464 | case SR_DF_FRAME_END: | |
465 | sr_dbg("bus: Received SR_DF_FRAME_END packet."); | |
466 | break; | |
467 | default: | |
468 | sr_dbg("bus: Received unknown packet type: %d.", packet->type); | |
469 | break; | |
470 | } | |
471 | } | |
472 | ||
473 | /** | |
474 | * Send a packet to whatever is listening on the datafeed bus. | |
475 | * | |
476 | * Hardware drivers use this to send a data packet to the frontend. | |
477 | * | |
478 | * @param sdi TODO. | |
479 | * @param packet The datafeed packet to send to the session bus. | |
480 | * | |
481 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
482 | * | |
483 | * @private | |
484 | */ | |
485 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, | |
486 | const struct sr_datafeed_packet *packet) | |
487 | { | |
488 | GSList *l; | |
489 | struct datafeed_callback *cb_struct; | |
490 | ||
491 | if (!sdi) { | |
492 | sr_err("%s: sdi was NULL", __func__); | |
493 | return SR_ERR_ARG; | |
494 | } | |
495 | ||
496 | if (!packet) { | |
497 | sr_err("%s: packet was NULL", __func__); | |
498 | return SR_ERR_ARG; | |
499 | } | |
500 | ||
501 | for (l = session->datafeed_callbacks; l; l = l->next) { | |
502 | if (sr_log_loglevel_get() >= SR_LOG_DBG) | |
503 | datafeed_dump(packet); | |
504 | cb_struct = l->data; | |
505 | cb_struct->cb(sdi, packet, cb_struct->cb_data); | |
506 | } | |
507 | ||
508 | return SR_OK; | |
509 | } | |
510 | ||
511 | /** | |
512 | * Add an event source for a file descriptor. | |
513 | * | |
514 | * @param pollfd The GPollFD. | |
515 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
516 | * @param cb Callback function to add. Must not be NULL. | |
517 | * @param cb_data Data for the callback function. Can be NULL. | |
518 | * @param poll_object TODO. | |
519 | * | |
520 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
521 | * SR_ERR_MALLOC upon memory allocation errors. | |
522 | */ | |
523 | static int _sr_session_source_add(GPollFD *pollfd, int timeout, | |
524 | sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object) | |
525 | { | |
526 | struct source *new_sources, *s; | |
527 | GPollFD *new_pollfds; | |
528 | ||
529 | if (!cb) { | |
530 | sr_err("%s: cb was NULL", __func__); | |
531 | return SR_ERR_ARG; | |
532 | } | |
533 | ||
534 | /* Note: cb_data can be NULL, that's not a bug. */ | |
535 | ||
536 | new_pollfds = g_try_realloc(session->pollfds, | |
537 | sizeof(GPollFD) * (session->num_sources + 1)); | |
538 | if (!new_pollfds) { | |
539 | sr_err("%s: new_pollfds malloc failed", __func__); | |
540 | return SR_ERR_MALLOC; | |
541 | } | |
542 | ||
543 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * | |
544 | (session->num_sources + 1)); | |
545 | if (!new_sources) { | |
546 | sr_err("%s: new_sources malloc failed", __func__); | |
547 | return SR_ERR_MALLOC; | |
548 | } | |
549 | ||
550 | new_pollfds[session->num_sources] = *pollfd; | |
551 | s = &new_sources[session->num_sources++]; | |
552 | s->timeout = timeout; | |
553 | s->cb = cb; | |
554 | s->cb_data = cb_data; | |
555 | s->poll_object = poll_object; | |
556 | session->pollfds = new_pollfds; | |
557 | session->sources = new_sources; | |
558 | ||
559 | if (timeout != session->source_timeout && timeout > 0 | |
560 | && (session->source_timeout == -1 || timeout < session->source_timeout)) | |
561 | session->source_timeout = timeout; | |
562 | ||
563 | return SR_OK; | |
564 | } | |
565 | ||
566 | /** | |
567 | * Add an event source for a file descriptor. | |
568 | * | |
569 | * @param fd The file descriptor. | |
570 | * @param events Events to check for. | |
571 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
572 | * @param cb Callback function to add. Must not be NULL. | |
573 | * @param cb_data Data for the callback function. Can be NULL. | |
574 | * | |
575 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
576 | * SR_ERR_MALLOC upon memory allocation errors. | |
577 | */ | |
578 | SR_API int sr_session_source_add(int fd, int events, int timeout, | |
579 | sr_receive_data_callback_t cb, void *cb_data) | |
580 | { | |
581 | GPollFD p; | |
582 | ||
583 | p.fd = fd; | |
584 | p.events = events; | |
585 | ||
586 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd); | |
587 | } | |
588 | ||
589 | /** | |
590 | * Add an event source for a GPollFD. | |
591 | * | |
592 | * @param pollfd The GPollFD. | |
593 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
594 | * @param cb Callback function to add. Must not be NULL. | |
595 | * @param cb_data Data for the callback function. Can be NULL. | |
596 | * | |
597 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
598 | * SR_ERR_MALLOC upon memory allocation errors. | |
599 | */ | |
600 | SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout, | |
601 | sr_receive_data_callback_t cb, void *cb_data) | |
602 | { | |
603 | return _sr_session_source_add(pollfd, timeout, cb, | |
604 | cb_data, (gintptr)pollfd); | |
605 | } | |
606 | ||
607 | /** | |
608 | * Add an event source for a GIOChannel. | |
609 | * | |
610 | * @param channel The GIOChannel. | |
611 | * @param events Events to poll on. | |
612 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
613 | * @param cb Callback function to add. Must not be NULL. | |
614 | * @param cb_data Data for the callback function. Can be NULL. | |
615 | * | |
616 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
617 | * SR_ERR_MALLOC upon memory allocation errors. | |
618 | */ | |
619 | SR_API int sr_session_source_add_channel(GIOChannel *channel, int events, | |
620 | int timeout, sr_receive_data_callback_t cb, void *cb_data) | |
621 | { | |
622 | GPollFD p; | |
623 | ||
624 | #ifdef _WIN32 | |
625 | g_io_channel_win32_make_pollfd(channel, events, &p); | |
626 | #else | |
627 | p.fd = g_io_channel_unix_get_fd(channel); | |
628 | p.events = events; | |
629 | #endif | |
630 | ||
631 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)channel); | |
632 | } | |
633 | ||
634 | /** | |
635 | * Remove the source belonging to the specified channel. | |
636 | * | |
637 | * @todo Add more error checks and logging. | |
638 | * | |
639 | * @param channel The channel for which the source should be removed. | |
640 | * | |
641 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
642 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
643 | * internal errors. | |
644 | */ | |
645 | static int _sr_session_source_remove(gintptr poll_object) | |
646 | { | |
647 | struct source *new_sources; | |
648 | GPollFD *new_pollfds; | |
649 | unsigned int old; | |
650 | ||
651 | if (!session->sources || !session->num_sources) { | |
652 | sr_err("%s: sources was NULL", __func__); | |
653 | return SR_ERR_BUG; | |
654 | } | |
655 | ||
656 | for (old = 0; old < session->num_sources; old++) { | |
657 | if (session->sources[old].poll_object == poll_object) | |
658 | break; | |
659 | } | |
660 | ||
661 | /* fd not found, nothing to do */ | |
662 | if (old == session->num_sources) | |
663 | return SR_OK; | |
664 | ||
665 | session->num_sources -= 1; | |
666 | ||
667 | if (old != session->num_sources) { | |
668 | memmove(&session->pollfds[old], &session->pollfds[old+1], | |
669 | (session->num_sources - old) * sizeof(GPollFD)); | |
670 | memmove(&session->sources[old], &session->sources[old+1], | |
671 | (session->num_sources - old) * sizeof(struct source)); | |
672 | } | |
673 | ||
674 | new_pollfds = g_try_realloc(session->pollfds, sizeof(GPollFD) * session->num_sources); | |
675 | if (!new_pollfds && session->num_sources > 0) { | |
676 | sr_err("%s: new_pollfds malloc failed", __func__); | |
677 | return SR_ERR_MALLOC; | |
678 | } | |
679 | ||
680 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * session->num_sources); | |
681 | if (!new_sources && session->num_sources > 0) { | |
682 | sr_err("%s: new_sources malloc failed", __func__); | |
683 | return SR_ERR_MALLOC; | |
684 | } | |
685 | ||
686 | session->pollfds = new_pollfds; | |
687 | session->sources = new_sources; | |
688 | ||
689 | return SR_OK; | |
690 | } | |
691 | ||
692 | /** | |
693 | * Remove the source belonging to the specified file descriptor. | |
694 | * | |
695 | * @param fd The file descriptor for which the source should be removed. | |
696 | * | |
697 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
698 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
699 | * internal errors. | |
700 | */ | |
701 | SR_API int sr_session_source_remove(int fd) | |
702 | { | |
703 | return _sr_session_source_remove((gintptr)fd); | |
704 | } | |
705 | ||
706 | /** | |
707 | * Remove the source belonging to the specified poll descriptor. | |
708 | * | |
709 | * @param pollfd The poll descriptor for which the source should be removed. | |
710 | * | |
711 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
712 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
713 | * internal errors. | |
714 | */ | |
715 | SR_API int sr_session_source_remove_pollfd(GPollFD *pollfd) | |
716 | { | |
717 | return _sr_session_source_remove((gintptr)pollfd); | |
718 | } | |
719 | ||
720 | /** | |
721 | * Remove the source belonging to the specified channel. | |
722 | * | |
723 | * @param channel The channel for which the source should be removed. | |
724 | * | |
725 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
726 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
727 | * internal errors. | |
728 | */ | |
729 | SR_API int sr_session_source_remove_channel(GIOChannel *channel) | |
730 | { | |
731 | return _sr_session_source_remove((gintptr)channel); | |
732 | } | |
733 | ||
734 | /** @} */ |