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a1bb33af | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
a1bb33af | 3 | * |
c73d2ea4 | 4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> |
a1bb33af UH |
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> | |
544a4582 | 24 | #include <glib.h> |
45c59c8b BV |
25 | #include "libsigrok.h" |
26 | #include "libsigrok-internal.h" | |
aa4b1107 | 27 | |
29a27196 UH |
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) | |
a421dc1d | 36 | |
393fb9cb UH |
37 | /** |
38 | * @file | |
39 | * | |
40 | * Creating, using, or destroying libsigrok sessions. | |
41 | */ | |
42 | ||
7b870c38 UH |
43 | /** |
44 | * @defgroup grp_session Session handling | |
45 | * | |
46 | * Creating, using, or destroying libsigrok sessions. | |
47 | * | |
48 | * @{ | |
49 | */ | |
50 | ||
544a4582 | 51 | struct source { |
544a4582 | 52 | int timeout; |
d08490aa | 53 | sr_receive_data_callback_t cb; |
1f9813eb | 54 | void *cb_data; |
aac0ea25 LPC |
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; | |
544a4582 BV |
60 | }; |
61 | ||
2726474a ML |
62 | struct datafeed_callback { |
63 | sr_datafeed_callback_t cb; | |
64 | void *cb_data; | |
65 | }; | |
66 | ||
7d658874 | 67 | /* There can only be one session at a time. */ |
a0ecd83b | 68 | /* 'session' is not static, it's used elsewhere (via 'extern'). */ |
2872d21e | 69 | struct sr_session *session; |
544a4582 | 70 | |
9f45fb3a UH |
71 | /** |
72 | * Create a new session. | |
73 | * | |
6b2d8d3e | 74 | * @todo Should it use the file-global "session" variable or take an argument? |
9f45fb3a UH |
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 | */ | |
1a081ca6 | 79 | SR_API struct sr_session *sr_session_new(void) |
a1bb33af | 80 | { |
133a37bf | 81 | if (!(session = g_try_malloc0(sizeof(struct sr_session)))) { |
a421dc1d UH |
82 | sr_err("Session malloc failed."); |
83 | return NULL; | |
9f45fb3a | 84 | } |
a1bb33af | 85 | |
b7e94111 | 86 | session->source_timeout = -1; |
33c6e4c5 AG |
87 | session->abort_session = FALSE; |
88 | g_mutex_init(&session->stop_mutex); | |
b7e94111 | 89 | |
a1bb33af UH |
90 | return session; |
91 | } | |
92 | ||
9f45fb3a UH |
93 | /** |
94 | * Destroy the current session. | |
95 | * | |
96 | * This frees up all memory used by the session. | |
97 | * | |
e0508e67 | 98 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 99 | */ |
1a081ca6 | 100 | SR_API int sr_session_destroy(void) |
a1bb33af | 101 | { |
9f45fb3a | 102 | if (!session) { |
a421dc1d | 103 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 104 | return SR_ERR_BUG; |
9f45fb3a UH |
105 | } |
106 | ||
ed229aaa | 107 | sr_session_dev_remove_all(); |
a1bb33af | 108 | |
9f45fb3a UH |
109 | /* TODO: Error checks needed? */ |
110 | ||
33c6e4c5 AG |
111 | g_mutex_clear(&session->stop_mutex); |
112 | ||
a1bb33af | 113 | g_free(session); |
9f45fb3a | 114 | session = NULL; |
e0508e67 UH |
115 | |
116 | return SR_OK; | |
a1bb33af UH |
117 | } |
118 | ||
9f45fb3a | 119 | /** |
6b2d8d3e | 120 | * Remove all the devices from the current session. |
9f45fb3a UH |
121 | * |
122 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
123 | * exists after this function returns. | |
124 | * | |
e0508e67 | 125 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 126 | */ |
01c3e9db | 127 | SR_API int sr_session_dev_remove_all(void) |
a1bb33af | 128 | { |
9f45fb3a | 129 | if (!session) { |
a421dc1d | 130 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 131 | return SR_ERR_BUG; |
9f45fb3a UH |
132 | } |
133 | ||
681803df | 134 | g_slist_free(session->devs); |
bb7ef793 | 135 | session->devs = NULL; |
e0508e67 UH |
136 | |
137 | return SR_OK; | |
a1bb33af UH |
138 | } |
139 | ||
9f45fb3a | 140 | /** |
9c5332d2 | 141 | * Add a device instance to the current session. |
9f45fb3a | 142 | * |
9c5332d2 | 143 | * @param sdi The device instance to add to the current session. Must not |
de4d3f99 BV |
144 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must |
145 | * not be NULL. | |
9f45fb3a UH |
146 | * |
147 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
148 | */ | |
de4d3f99 | 149 | SR_API int sr_session_dev_add(const struct sr_dev_inst *sdi) |
a1bb33af | 150 | { |
a1bb33af | 151 | |
de4d3f99 | 152 | if (!sdi) { |
a421dc1d | 153 | sr_err("%s: sdi was NULL", __func__); |
9f45fb3a UH |
154 | return SR_ERR_ARG; |
155 | } | |
156 | ||
d6eb0c33 | 157 | if (!session) { |
a421dc1d | 158 | sr_err("%s: session was NULL", __func__); |
d6eb0c33 UH |
159 | return SR_ERR_BUG; |
160 | } | |
161 | ||
de4d3f99 BV |
162 | /* If sdi->driver is NULL, this is a virtual device. */ |
163 | if (!sdi->driver) { | |
a421dc1d | 164 | sr_dbg("%s: sdi->driver was NULL, this seems to be " |
d6eb0c33 UH |
165 | "a virtual device; continuing", __func__); |
166 | /* Just add the device, don't run dev_open(). */ | |
de4d3f99 | 167 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
d6eb0c33 | 168 | return SR_OK; |
9f45fb3a UH |
169 | } |
170 | ||
de4d3f99 BV |
171 | /* sdi->driver is non-NULL (i.e. we have a real device). */ |
172 | if (!sdi->driver->dev_open) { | |
a421dc1d | 173 | sr_err("%s: sdi->driver->dev_open was NULL", __func__); |
8ec95d22 | 174 | return SR_ERR_BUG; |
9f45fb3a UH |
175 | } |
176 | ||
de4d3f99 | 177 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
aa4b1107 | 178 | |
e46b8fb1 | 179 | return SR_OK; |
a1bb33af UH |
180 | } |
181 | ||
9f45fb3a | 182 | /** |
01c3e9db | 183 | * Remove all datafeed callbacks in the current session. |
9f45fb3a | 184 | * |
e0508e67 | 185 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 186 | */ |
01c3e9db | 187 | SR_API int sr_session_datafeed_callback_remove_all(void) |
a1bb33af | 188 | { |
9f45fb3a | 189 | if (!session) { |
a421dc1d | 190 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 191 | return SR_ERR_BUG; |
9f45fb3a UH |
192 | } |
193 | ||
2726474a | 194 | g_slist_free_full(session->datafeed_callbacks, g_free); |
a1bb33af | 195 | session->datafeed_callbacks = NULL; |
e0508e67 UH |
196 | |
197 | return SR_OK; | |
a1bb33af UH |
198 | } |
199 | ||
9f45fb3a UH |
200 | /** |
201 | * Add a datafeed callback to the current session. | |
202 | * | |
d08490aa | 203 | * @param cb Function to call when a chunk of data is received. |
0abee507 | 204 | * Must not be NULL. |
85222791 | 205 | * @param cb_data Opaque pointer passed in by the caller. |
a1645fcd | 206 | * |
e0508e67 | 207 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 208 | */ |
2726474a | 209 | SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb, void *cb_data) |
a1bb33af | 210 | { |
2726474a ML |
211 | struct datafeed_callback *cb_struct; |
212 | ||
9f45fb3a | 213 | if (!session) { |
a421dc1d | 214 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 215 | return SR_ERR_BUG; |
9f45fb3a UH |
216 | } |
217 | ||
0abee507 | 218 | if (!cb) { |
a421dc1d | 219 | sr_err("%s: cb was NULL", __func__); |
0abee507 UH |
220 | return SR_ERR_ARG; |
221 | } | |
9f45fb3a | 222 | |
2726474a ML |
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 | ||
62c82025 | 229 | session->datafeed_callbacks = |
2726474a | 230 | g_slist_append(session->datafeed_callbacks, cb_struct); |
e0508e67 UH |
231 | |
232 | return SR_OK; | |
a1bb33af UH |
233 | } |
234 | ||
b483be74 BV |
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 | * | |
f6eb2cb5 BV |
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 | * | |
b483be74 BV |
249 | * @return SR_OK upon success, SR_ERR on errors. |
250 | */ | |
1861be0b | 251 | static int sr_session_iteration(gboolean block) |
544a4582 | 252 | { |
b7e94111 LPC |
253 | unsigned int i; |
254 | int ret; | |
544a4582 | 255 | |
b483be74 BV |
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)) { | |
33c6e4c5 | 261 | /* |
b483be74 BV |
262 | * Invoke the source's callback on an event, |
263 | * or if the poll timed out and this source | |
264 | * asked for that timeout. | |
33c6e4c5 | 265 | */ |
b483be74 BV |
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; | |
544a4582 | 282 | } |
b483be74 | 283 | g_mutex_unlock(&session->stop_mutex); |
544a4582 | 284 | } |
e0508e67 UH |
285 | |
286 | return SR_OK; | |
544a4582 BV |
287 | } |
288 | ||
9f45fb3a UH |
289 | /** |
290 | * Start a session. | |
291 | * | |
a1645fcd | 292 | * There can only be one session at a time. |
9f45fb3a UH |
293 | * |
294 | * @return SR_OK upon success, SR_ERR upon errors. | |
295 | */ | |
1a081ca6 | 296 | SR_API int sr_session_start(void) |
7d658874 | 297 | { |
de4d3f99 | 298 | struct sr_dev_inst *sdi; |
7d658874 BV |
299 | GSList *l; |
300 | int ret; | |
301 | ||
9f45fb3a | 302 | if (!session) { |
a421dc1d | 303 | sr_err("%s: session was NULL; a session must be " |
de4d3f99 | 304 | "created before starting it.", __func__); |
0abee507 | 305 | return SR_ERR_BUG; |
9f45fb3a UH |
306 | } |
307 | ||
bb7ef793 | 308 | if (!session->devs) { |
a421dc1d | 309 | sr_err("%s: session->devs was NULL; a session " |
9f45fb3a | 310 | "cannot be started without devices.", __func__); |
0abee507 | 311 | return SR_ERR_BUG; |
9f45fb3a UH |
312 | } |
313 | ||
c7142604 | 314 | sr_info("Starting."); |
9f45fb3a | 315 | |
b7c3e849 | 316 | ret = SR_OK; |
bb7ef793 | 317 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
318 | sdi = l->data; |
319 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
a421dc1d | 320 | sr_err("%s: could not start an acquisition " |
9f45fb3a | 321 | "(%d)", __func__, ret); |
7d658874 | 322 | break; |
9f45fb3a | 323 | } |
7d658874 BV |
324 | } |
325 | ||
9f45fb3a UH |
326 | /* TODO: What if there are multiple devices? Which return code? */ |
327 | ||
7d658874 BV |
328 | return ret; |
329 | } | |
330 | ||
9f45fb3a UH |
331 | /** |
332 | * Run the session. | |
333 | * | |
e0508e67 | 334 | * @return SR_OK upon success, SR_ERR_BUG upon errors. |
9f45fb3a | 335 | */ |
1a081ca6 | 336 | SR_API int sr_session_run(void) |
7d658874 | 337 | { |
9f45fb3a | 338 | if (!session) { |
a421dc1d | 339 | sr_err("%s: session was NULL; a session must be " |
9f45fb3a | 340 | "created first, before running it.", __func__); |
e0508e67 | 341 | return SR_ERR_BUG; |
9f45fb3a UH |
342 | } |
343 | ||
bb7ef793 | 344 | if (!session->devs) { |
9f45fb3a | 345 | /* TODO: Actually the case? */ |
a421dc1d | 346 | sr_err("%s: session->devs was NULL; a session " |
9f45fb3a | 347 | "cannot be run without devices.", __func__); |
e0508e67 | 348 | return SR_ERR_BUG; |
9f45fb3a UH |
349 | } |
350 | ||
a421dc1d | 351 | sr_info("Running."); |
7d658874 | 352 | |
9f45fb3a | 353 | /* Do we have real sources? */ |
b7e94111 | 354 | if (session->num_sources == 1 && session->pollfds[0].fd == -1) { |
9f45fb3a | 355 | /* Dummy source, freewheel over it. */ |
2cbeb2b7 | 356 | while (session->num_sources) |
b7e94111 | 357 | session->sources[0].cb(-1, 0, session->sources[0].cb_data); |
9f45fb3a UH |
358 | } else { |
359 | /* Real sources, use g_poll() main loop. */ | |
b483be74 BV |
360 | while (session->num_sources) |
361 | sr_session_iteration(TRUE); | |
9f45fb3a UH |
362 | } |
363 | ||
e0508e67 | 364 | return SR_OK; |
7d658874 BV |
365 | } |
366 | ||
9f45fb3a UH |
367 | /** |
368 | * Stop the current session. | |
369 | * | |
a1645fcd | 370 | * The current session is stopped immediately, with all acquisition sessions |
c09f0b57 | 371 | * being stopped and hardware drivers cleaned up. |
9f45fb3a | 372 | * |
33c6e4c5 AG |
373 | * This must be called from within the session thread, to prevent freeing |
374 | * resources that the session thread will try to use. | |
375 | * | |
e0508e67 | 376 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 377 | */ |
33c6e4c5 | 378 | SR_PRIV int sr_session_stop_sync(void) |
a1bb33af | 379 | { |
de4d3f99 | 380 | struct sr_dev_inst *sdi; |
a1bb33af UH |
381 | GSList *l; |
382 | ||
9f45fb3a | 383 | if (!session) { |
a421dc1d | 384 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 385 | return SR_ERR_BUG; |
9f45fb3a UH |
386 | } |
387 | ||
a421dc1d | 388 | sr_info("Stopping."); |
e0508e67 | 389 | |
bb7ef793 | 390 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
391 | sdi = l->data; |
392 | if (sdi->driver) { | |
393 | if (sdi->driver->dev_acquisition_stop) | |
394 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
8c76be53 | 395 | } |
a1bb33af | 396 | } |
9f45fb3a | 397 | |
e0508e67 | 398 | return SR_OK; |
a1bb33af UH |
399 | } |
400 | ||
33c6e4c5 AG |
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 | ||
9f45fb3a | 428 | /** |
a1645fcd | 429 | * Debug helper. |
9f45fb3a | 430 | * |
996b0c72 | 431 | * @param packet The packet to show debugging information for. |
9f45fb3a | 432 | */ |
bf53457d | 433 | static void datafeed_dump(const struct sr_datafeed_packet *packet) |
7d2afd6c | 434 | { |
bf53457d JH |
435 | const struct sr_datafeed_logic *logic; |
436 | const struct sr_datafeed_analog *analog; | |
7d2afd6c BV |
437 | |
438 | switch (packet->type) { | |
439 | case SR_DF_HEADER: | |
a421dc1d | 440 | sr_dbg("bus: Received SR_DF_HEADER packet."); |
7d2afd6c BV |
441 | break; |
442 | case SR_DF_TRIGGER: | |
a421dc1d | 443 | sr_dbg("bus: Received SR_DF_TRIGGER packet."); |
7d2afd6c | 444 | break; |
c71bac3b | 445 | case SR_DF_META: |
a421dc1d | 446 | sr_dbg("bus: Received SR_DF_META packet."); |
ee7489d2 | 447 | break; |
7d2afd6c BV |
448 | case SR_DF_LOGIC: |
449 | logic = packet->payload; | |
a421dc1d UH |
450 | sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes).", |
451 | logic->length); | |
7d2afd6c | 452 | break; |
ee7489d2 BV |
453 | case SR_DF_ANALOG: |
454 | analog = packet->payload; | |
a421dc1d UH |
455 | sr_dbg("bus: Received SR_DF_ANALOG packet (%d samples).", |
456 | analog->num_samples); | |
ee7489d2 | 457 | break; |
7d2afd6c | 458 | case SR_DF_END: |
a421dc1d | 459 | sr_dbg("bus: Received SR_DF_END packet."); |
7d2afd6c | 460 | break; |
6ea7669c | 461 | case SR_DF_FRAME_BEGIN: |
a421dc1d | 462 | sr_dbg("bus: Received SR_DF_FRAME_BEGIN packet."); |
6ea7669c BV |
463 | break; |
464 | case SR_DF_FRAME_END: | |
a421dc1d | 465 | sr_dbg("bus: Received SR_DF_FRAME_END packet."); |
6ea7669c | 466 | break; |
7d2afd6c | 467 | default: |
a421dc1d | 468 | sr_dbg("bus: Received unknown packet type: %d.", packet->type); |
9f45fb3a | 469 | break; |
7d2afd6c | 470 | } |
7d2afd6c BV |
471 | } |
472 | ||
9f45fb3a | 473 | /** |
a1645fcd BV |
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. | |
9f45fb3a | 477 | * |
6b2d8d3e | 478 | * @param sdi TODO. |
31ccebc4 | 479 | * @param packet The datafeed packet to send to the session bus. |
44dae539 | 480 | * |
e0508e67 | 481 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. |
b4bd7088 UH |
482 | * |
483 | * @private | |
9f45fb3a | 484 | */ |
de4d3f99 | 485 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, |
bf53457d | 486 | const struct sr_datafeed_packet *packet) |
a1bb33af UH |
487 | { |
488 | GSList *l; | |
2726474a | 489 | struct datafeed_callback *cb_struct; |
a1bb33af | 490 | |
de4d3f99 | 491 | if (!sdi) { |
a421dc1d | 492 | sr_err("%s: sdi was NULL", __func__); |
e0508e67 | 493 | return SR_ERR_ARG; |
9f45fb3a UH |
494 | } |
495 | ||
e0508e67 | 496 | if (!packet) { |
a421dc1d | 497 | sr_err("%s: packet was NULL", __func__); |
e0508e67 | 498 | return SR_ERR_ARG; |
9f45fb3a UH |
499 | } |
500 | ||
62c82025 | 501 | for (l = session->datafeed_callbacks; l; l = l->next) { |
18beaeff BV |
502 | if (sr_log_loglevel_get() >= SR_LOG_DBG) |
503 | datafeed_dump(packet); | |
2726474a ML |
504 | cb_struct = l->data; |
505 | cb_struct->cb(sdi, packet, cb_struct->cb_data); | |
a1bb33af | 506 | } |
9f45fb3a | 507 | |
e0508e67 | 508 | return SR_OK; |
a1bb33af UH |
509 | } |
510 | ||
6b2d8d3e UH |
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 | */ | |
aac0ea25 | 523 | static int _sr_session_source_add(GPollFD *pollfd, int timeout, |
1a895c61 | 524 | sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object) |
544a4582 BV |
525 | { |
526 | struct source *new_sources, *s; | |
aac0ea25 | 527 | GPollFD *new_pollfds; |
544a4582 | 528 | |
d08490aa | 529 | if (!cb) { |
a421dc1d | 530 | sr_err("%s: cb was NULL", __func__); |
e0508e67 | 531 | return SR_ERR_ARG; |
9f45fb3a UH |
532 | } |
533 | ||
1f9813eb | 534 | /* Note: cb_data can be NULL, that's not a bug. */ |
9f45fb3a | 535 | |
2ac2e629 BV |
536 | new_pollfds = g_try_realloc(session->pollfds, |
537 | sizeof(GPollFD) * (session->num_sources + 1)); | |
0687dfcd | 538 | if (!new_pollfds) { |
a421dc1d | 539 | sr_err("%s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
540 | return SR_ERR_MALLOC; |
541 | } | |
542 | ||
b7e94111 | 543 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * |
2ac2e629 | 544 | (session->num_sources + 1)); |
9f45fb3a | 545 | if (!new_sources) { |
a421dc1d | 546 | sr_err("%s: new_sources malloc failed", __func__); |
e0508e67 | 547 | return SR_ERR_MALLOC; |
9f45fb3a | 548 | } |
544a4582 | 549 | |
b7e94111 LPC |
550 | new_pollfds[session->num_sources] = *pollfd; |
551 | s = &new_sources[session->num_sources++]; | |
544a4582 | 552 | s->timeout = timeout; |
d08490aa | 553 | s->cb = cb; |
1f9813eb | 554 | s->cb_data = cb_data; |
aac0ea25 | 555 | s->poll_object = poll_object; |
b7e94111 LPC |
556 | session->pollfds = new_pollfds; |
557 | session->sources = new_sources; | |
544a4582 | 558 | |
b7e94111 LPC |
559 | if (timeout != session->source_timeout && timeout > 0 |
560 | && (session->source_timeout == -1 || timeout < session->source_timeout)) | |
561 | session->source_timeout = timeout; | |
9f45fb3a | 562 | |
e0508e67 | 563 | return SR_OK; |
544a4582 BV |
564 | } |
565 | ||
9f45fb3a | 566 | /** |
6b2d8d3e | 567 | * Add an event source for a file descriptor. |
9f45fb3a | 568 | * |
aac0ea25 LPC |
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. | |
9f45fb3a | 574 | * |
aac0ea25 LPC |
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 | ||
aac0ea25 LPC |
583 | p.fd = fd; |
584 | p.events = events; | |
aac0ea25 LPC |
585 | |
586 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd); | |
587 | } | |
588 | ||
589 | /** | |
1a895c61 | 590 | * Add an event source for a GPollFD. |
aac0ea25 | 591 | * |
aac0ea25 LPC |
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. | |
44dae539 | 596 | * |
e0508e67 | 597 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
aac0ea25 | 598 | * SR_ERR_MALLOC upon memory allocation errors. |
9f45fb3a | 599 | */ |
aac0ea25 LPC |
600 | SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout, |
601 | sr_receive_data_callback_t cb, void *cb_data) | |
602 | { | |
1a895c61 UH |
603 | return _sr_session_source_add(pollfd, timeout, cb, |
604 | cb_data, (gintptr)pollfd); | |
aac0ea25 LPC |
605 | } |
606 | ||
607 | /** | |
1a895c61 | 608 | * Add an event source for a GIOChannel. |
aac0ea25 | 609 | * |
aac0ea25 LPC |
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 | */ | |
1a895c61 UH |
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) | |
aac0ea25 LPC |
621 | { |
622 | GPollFD p; | |
623 | ||
624 | #ifdef _WIN32 | |
6b2d8d3e | 625 | g_io_channel_win32_make_pollfd(channel, events, &p); |
aac0ea25 LPC |
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 | ||
6b2d8d3e UH |
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 | */ | |
aac0ea25 | 645 | static int _sr_session_source_remove(gintptr poll_object) |
544a4582 BV |
646 | { |
647 | struct source *new_sources; | |
0687dfcd | 648 | GPollFD *new_pollfds; |
b7e94111 | 649 | unsigned int old; |
544a4582 | 650 | |
b7e94111 | 651 | if (!session->sources || !session->num_sources) { |
a421dc1d | 652 | sr_err("%s: sources was NULL", __func__); |
0abee507 | 653 | return SR_ERR_BUG; |
e0508e67 UH |
654 | } |
655 | ||
b7e94111 LPC |
656 | for (old = 0; old < session->num_sources; old++) { |
657 | if (session->sources[old].poll_object == poll_object) | |
2bccd322 | 658 | break; |
9f45fb3a UH |
659 | } |
660 | ||
2bccd322 | 661 | /* fd not found, nothing to do */ |
b7e94111 | 662 | if (old == session->num_sources) |
2bccd322 LPC |
663 | return SR_OK; |
664 | ||
b7e94111 | 665 | session->num_sources -= 1; |
2bccd322 | 666 | |
b7e94111 LPC |
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)); | |
9f45fb3a | 672 | } |
544a4582 | 673 | |
b7e94111 LPC |
674 | new_pollfds = g_try_realloc(session->pollfds, sizeof(GPollFD) * session->num_sources); |
675 | if (!new_pollfds && session->num_sources > 0) { | |
a421dc1d | 676 | sr_err("%s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
677 | return SR_ERR_MALLOC; |
678 | } | |
679 | ||
b7e94111 LPC |
680 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * session->num_sources); |
681 | if (!new_sources && session->num_sources > 0) { | |
a421dc1d | 682 | sr_err("%s: new_sources malloc failed", __func__); |
2bccd322 | 683 | return SR_ERR_MALLOC; |
544a4582 | 684 | } |
e0508e67 | 685 | |
b7e94111 LPC |
686 | session->pollfds = new_pollfds; |
687 | session->sources = new_sources; | |
2bccd322 | 688 | |
e0508e67 | 689 | return SR_OK; |
544a4582 | 690 | } |
aac0ea25 | 691 | |
6b2d8d3e | 692 | /** |
aac0ea25 LPC |
693 | * Remove the source belonging to the specified file descriptor. |
694 | * | |
1a895c61 | 695 | * @param fd The file descriptor for which the source should be removed. |
aac0ea25 LPC |
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 | * | |
aac0ea25 LPC |
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 | ||
6b2d8d3e | 720 | /** |
aac0ea25 LPC |
721 | * Remove the source belonging to the specified channel. |
722 | * | |
1a895c61 | 723 | * @param channel The channel for which the source should be removed. |
aac0ea25 LPC |
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 | } | |
7b870c38 UH |
733 | |
734 | /** @} */ |