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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; |
5451816f | 87 | session->running = FALSE; |
33c6e4c5 AG |
88 | session->abort_session = FALSE; |
89 | g_mutex_init(&session->stop_mutex); | |
b7e94111 | 90 | |
a1bb33af UH |
91 | return session; |
92 | } | |
93 | ||
9f45fb3a UH |
94 | /** |
95 | * Destroy the current session. | |
96 | * | |
97 | * This frees up all memory used by the session. | |
98 | * | |
e0508e67 | 99 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 100 | */ |
1a081ca6 | 101 | SR_API int sr_session_destroy(void) |
a1bb33af | 102 | { |
9f45fb3a | 103 | if (!session) { |
a421dc1d | 104 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 105 | return SR_ERR_BUG; |
9f45fb3a UH |
106 | } |
107 | ||
ed229aaa | 108 | sr_session_dev_remove_all(); |
a1bb33af | 109 | |
9f45fb3a UH |
110 | /* TODO: Error checks needed? */ |
111 | ||
33c6e4c5 AG |
112 | g_mutex_clear(&session->stop_mutex); |
113 | ||
a1bb33af | 114 | g_free(session); |
9f45fb3a | 115 | session = NULL; |
e0508e67 UH |
116 | |
117 | return SR_OK; | |
a1bb33af UH |
118 | } |
119 | ||
9f45fb3a | 120 | /** |
6b2d8d3e | 121 | * Remove all the devices from the current session. |
9f45fb3a UH |
122 | * |
123 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
124 | * exists after this function returns. | |
125 | * | |
e0508e67 | 126 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 127 | */ |
01c3e9db | 128 | SR_API int sr_session_dev_remove_all(void) |
a1bb33af | 129 | { |
9f45fb3a | 130 | if (!session) { |
a421dc1d | 131 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 132 | return SR_ERR_BUG; |
9f45fb3a UH |
133 | } |
134 | ||
681803df | 135 | g_slist_free(session->devs); |
bb7ef793 | 136 | session->devs = NULL; |
e0508e67 UH |
137 | |
138 | return SR_OK; | |
a1bb33af UH |
139 | } |
140 | ||
9f45fb3a | 141 | /** |
9c5332d2 | 142 | * Add a device instance to the current session. |
9f45fb3a | 143 | * |
9c5332d2 | 144 | * @param sdi The device instance to add to the current session. Must not |
de4d3f99 BV |
145 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must |
146 | * not be NULL. | |
9f45fb3a UH |
147 | * |
148 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
149 | */ | |
de4d3f99 | 150 | SR_API int sr_session_dev_add(const struct sr_dev_inst *sdi) |
a1bb33af | 151 | { |
5451816f | 152 | int ret; |
a1bb33af | 153 | |
de4d3f99 | 154 | if (!sdi) { |
a421dc1d | 155 | sr_err("%s: sdi was NULL", __func__); |
9f45fb3a UH |
156 | return SR_ERR_ARG; |
157 | } | |
158 | ||
d6eb0c33 | 159 | if (!session) { |
a421dc1d | 160 | sr_err("%s: session was NULL", __func__); |
d6eb0c33 UH |
161 | return SR_ERR_BUG; |
162 | } | |
163 | ||
de4d3f99 BV |
164 | /* If sdi->driver is NULL, this is a virtual device. */ |
165 | if (!sdi->driver) { | |
a421dc1d | 166 | sr_dbg("%s: sdi->driver was NULL, this seems to be " |
d6eb0c33 UH |
167 | "a virtual device; continuing", __func__); |
168 | /* Just add the device, don't run dev_open(). */ | |
de4d3f99 | 169 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
d6eb0c33 | 170 | return SR_OK; |
9f45fb3a UH |
171 | } |
172 | ||
de4d3f99 BV |
173 | /* sdi->driver is non-NULL (i.e. we have a real device). */ |
174 | if (!sdi->driver->dev_open) { | |
a421dc1d | 175 | sr_err("%s: sdi->driver->dev_open was NULL", __func__); |
8ec95d22 | 176 | return SR_ERR_BUG; |
9f45fb3a UH |
177 | } |
178 | ||
de4d3f99 | 179 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
aa4b1107 | 180 | |
5451816f BV |
181 | if (session->running) { |
182 | /* Adding a device to a running session. Start acquisition | |
183 | * on that device now. */ | |
184 | if ((ret = sdi->driver->dev_acquisition_start(sdi, | |
185 | (void *)sdi)) != SR_OK) | |
186 | sr_err("Failed to start acquisition of device in " | |
187 | "running session: %d", ret); | |
188 | } | |
189 | ||
e46b8fb1 | 190 | return SR_OK; |
a1bb33af UH |
191 | } |
192 | ||
9f45fb3a | 193 | /** |
01c3e9db | 194 | * Remove all datafeed callbacks in the current session. |
9f45fb3a | 195 | * |
e0508e67 | 196 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 197 | */ |
01c3e9db | 198 | SR_API int sr_session_datafeed_callback_remove_all(void) |
a1bb33af | 199 | { |
9f45fb3a | 200 | if (!session) { |
a421dc1d | 201 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 202 | return SR_ERR_BUG; |
9f45fb3a UH |
203 | } |
204 | ||
2726474a | 205 | g_slist_free_full(session->datafeed_callbacks, g_free); |
a1bb33af | 206 | session->datafeed_callbacks = NULL; |
e0508e67 UH |
207 | |
208 | return SR_OK; | |
a1bb33af UH |
209 | } |
210 | ||
9f45fb3a UH |
211 | /** |
212 | * Add a datafeed callback to the current session. | |
213 | * | |
d08490aa | 214 | * @param cb Function to call when a chunk of data is received. |
0abee507 | 215 | * Must not be NULL. |
85222791 | 216 | * @param cb_data Opaque pointer passed in by the caller. |
a1645fcd | 217 | * |
e0508e67 | 218 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 219 | */ |
2726474a | 220 | SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb, void *cb_data) |
a1bb33af | 221 | { |
2726474a ML |
222 | struct datafeed_callback *cb_struct; |
223 | ||
9f45fb3a | 224 | if (!session) { |
a421dc1d | 225 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 226 | return SR_ERR_BUG; |
9f45fb3a UH |
227 | } |
228 | ||
0abee507 | 229 | if (!cb) { |
a421dc1d | 230 | sr_err("%s: cb was NULL", __func__); |
0abee507 UH |
231 | return SR_ERR_ARG; |
232 | } | |
9f45fb3a | 233 | |
2726474a ML |
234 | if (!(cb_struct = g_try_malloc0(sizeof(struct datafeed_callback)))) |
235 | return SR_ERR_MALLOC; | |
236 | ||
237 | cb_struct->cb = cb; | |
238 | cb_struct->cb_data = cb_data; | |
239 | ||
62c82025 | 240 | session->datafeed_callbacks = |
2726474a | 241 | g_slist_append(session->datafeed_callbacks, cb_struct); |
e0508e67 UH |
242 | |
243 | return SR_OK; | |
a1bb33af UH |
244 | } |
245 | ||
b483be74 BV |
246 | /** |
247 | * Call every device in the session's callback. | |
248 | * | |
249 | * For sessions not driven by select loops such as sr_session_run(), | |
250 | * but driven by another scheduler, this can be used to poll the devices | |
251 | * from within that scheduler. | |
252 | * | |
f6eb2cb5 BV |
253 | * @param block If TRUE, this call will wait for any of the session's |
254 | * sources to fire an event on the file descriptors, or | |
255 | * any of their timeouts to activate. In other words, this | |
256 | * can be used as a select loop. | |
257 | * If FALSE, all sources have their callback run, regardless | |
258 | * of file descriptor or timeout status. | |
259 | * | |
b483be74 BV |
260 | * @return SR_OK upon success, SR_ERR on errors. |
261 | */ | |
1861be0b | 262 | static int sr_session_iteration(gboolean block) |
544a4582 | 263 | { |
b7e94111 LPC |
264 | unsigned int i; |
265 | int ret; | |
544a4582 | 266 | |
b483be74 BV |
267 | ret = g_poll(session->pollfds, session->num_sources, |
268 | block ? session->source_timeout : 0); | |
269 | for (i = 0; i < session->num_sources; i++) { | |
270 | if (session->pollfds[i].revents > 0 || (ret == 0 | |
271 | && session->source_timeout == session->sources[i].timeout)) { | |
33c6e4c5 | 272 | /* |
b483be74 BV |
273 | * Invoke the source's callback on an event, |
274 | * or if the poll timed out and this source | |
275 | * asked for that timeout. | |
33c6e4c5 | 276 | */ |
b483be74 BV |
277 | if (!session->sources[i].cb(session->pollfds[i].fd, |
278 | session->pollfds[i].revents, | |
279 | session->sources[i].cb_data)) | |
280 | sr_session_source_remove(session->sources[i].poll_object); | |
281 | } | |
282 | /* | |
283 | * We want to take as little time as possible to stop | |
284 | * the session if we have been told to do so. Therefore, | |
285 | * we check the flag after processing every source, not | |
286 | * just once per main event loop. | |
287 | */ | |
288 | g_mutex_lock(&session->stop_mutex); | |
289 | if (session->abort_session) { | |
290 | sr_session_stop_sync(); | |
291 | /* But once is enough. */ | |
292 | session->abort_session = FALSE; | |
544a4582 | 293 | } |
b483be74 | 294 | g_mutex_unlock(&session->stop_mutex); |
544a4582 | 295 | } |
e0508e67 UH |
296 | |
297 | return SR_OK; | |
544a4582 BV |
298 | } |
299 | ||
9f45fb3a UH |
300 | /** |
301 | * Start a session. | |
302 | * | |
a1645fcd | 303 | * There can only be one session at a time. |
9f45fb3a UH |
304 | * |
305 | * @return SR_OK upon success, SR_ERR upon errors. | |
306 | */ | |
1a081ca6 | 307 | SR_API int sr_session_start(void) |
7d658874 | 308 | { |
de4d3f99 | 309 | struct sr_dev_inst *sdi; |
7d658874 BV |
310 | GSList *l; |
311 | int ret; | |
312 | ||
9f45fb3a | 313 | if (!session) { |
a421dc1d | 314 | sr_err("%s: session was NULL; a session must be " |
de4d3f99 | 315 | "created before starting it.", __func__); |
0abee507 | 316 | return SR_ERR_BUG; |
9f45fb3a UH |
317 | } |
318 | ||
bb7ef793 | 319 | if (!session->devs) { |
a421dc1d | 320 | sr_err("%s: session->devs was NULL; a session " |
9f45fb3a | 321 | "cannot be started without devices.", __func__); |
0abee507 | 322 | return SR_ERR_BUG; |
9f45fb3a UH |
323 | } |
324 | ||
c7142604 | 325 | sr_info("Starting."); |
9f45fb3a | 326 | |
b7c3e849 | 327 | ret = SR_OK; |
bb7ef793 | 328 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
329 | sdi = l->data; |
330 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
a421dc1d | 331 | sr_err("%s: could not start an acquisition " |
568dcacc | 332 | "(%s)", __func__, sr_strerror(ret)); |
7d658874 | 333 | break; |
9f45fb3a | 334 | } |
7d658874 BV |
335 | } |
336 | ||
9f45fb3a UH |
337 | /* TODO: What if there are multiple devices? Which return code? */ |
338 | ||
7d658874 BV |
339 | return ret; |
340 | } | |
341 | ||
9f45fb3a UH |
342 | /** |
343 | * Run the session. | |
344 | * | |
e0508e67 | 345 | * @return SR_OK upon success, SR_ERR_BUG upon errors. |
9f45fb3a | 346 | */ |
1a081ca6 | 347 | SR_API int sr_session_run(void) |
7d658874 | 348 | { |
9f45fb3a | 349 | if (!session) { |
a421dc1d | 350 | sr_err("%s: session was NULL; a session must be " |
9f45fb3a | 351 | "created first, before running it.", __func__); |
e0508e67 | 352 | return SR_ERR_BUG; |
9f45fb3a UH |
353 | } |
354 | ||
bb7ef793 | 355 | if (!session->devs) { |
9f45fb3a | 356 | /* TODO: Actually the case? */ |
a421dc1d | 357 | sr_err("%s: session->devs was NULL; a session " |
9f45fb3a | 358 | "cannot be run without devices.", __func__); |
e0508e67 | 359 | return SR_ERR_BUG; |
9f45fb3a | 360 | } |
5451816f | 361 | session->running = TRUE; |
9f45fb3a | 362 | |
a421dc1d | 363 | sr_info("Running."); |
7d658874 | 364 | |
9f45fb3a | 365 | /* Do we have real sources? */ |
b7e94111 | 366 | if (session->num_sources == 1 && session->pollfds[0].fd == -1) { |
9f45fb3a | 367 | /* Dummy source, freewheel over it. */ |
2cbeb2b7 | 368 | while (session->num_sources) |
b7e94111 | 369 | session->sources[0].cb(-1, 0, session->sources[0].cb_data); |
9f45fb3a UH |
370 | } else { |
371 | /* Real sources, use g_poll() main loop. */ | |
b483be74 BV |
372 | while (session->num_sources) |
373 | sr_session_iteration(TRUE); | |
9f45fb3a UH |
374 | } |
375 | ||
e0508e67 | 376 | return SR_OK; |
7d658874 BV |
377 | } |
378 | ||
9f45fb3a UH |
379 | /** |
380 | * Stop the current session. | |
381 | * | |
a1645fcd | 382 | * The current session is stopped immediately, with all acquisition sessions |
c09f0b57 | 383 | * being stopped and hardware drivers cleaned up. |
9f45fb3a | 384 | * |
33c6e4c5 AG |
385 | * This must be called from within the session thread, to prevent freeing |
386 | * resources that the session thread will try to use. | |
387 | * | |
e0508e67 | 388 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
72a08bcc BV |
389 | * |
390 | * @private | |
9f45fb3a | 391 | */ |
33c6e4c5 | 392 | SR_PRIV int sr_session_stop_sync(void) |
a1bb33af | 393 | { |
de4d3f99 | 394 | struct sr_dev_inst *sdi; |
a1bb33af UH |
395 | GSList *l; |
396 | ||
9f45fb3a | 397 | if (!session) { |
a421dc1d | 398 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 399 | return SR_ERR_BUG; |
9f45fb3a UH |
400 | } |
401 | ||
a421dc1d | 402 | sr_info("Stopping."); |
e0508e67 | 403 | |
bb7ef793 | 404 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
405 | sdi = l->data; |
406 | if (sdi->driver) { | |
407 | if (sdi->driver->dev_acquisition_stop) | |
408 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
8c76be53 | 409 | } |
a1bb33af | 410 | } |
5451816f | 411 | session->running = FALSE; |
9f45fb3a | 412 | |
e0508e67 | 413 | return SR_OK; |
a1bb33af UH |
414 | } |
415 | ||
33c6e4c5 AG |
416 | /** |
417 | * Stop the current session. | |
418 | * | |
419 | * The current session is stopped immediately, with all acquisition sessions | |
420 | * being stopped and hardware drivers cleaned up. | |
421 | * | |
422 | * If the session is run in a separate thread, this function will not block | |
423 | * until the session is finished executing. It is the caller's responsibility | |
424 | * to wait for the session thread to return before assuming that the session is | |
425 | * completely decommissioned. | |
426 | * | |
427 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
428 | */ | |
429 | SR_API int sr_session_stop(void) | |
430 | { | |
431 | if (!session) { | |
432 | sr_err("%s: session was NULL", __func__); | |
433 | return SR_ERR_BUG; | |
434 | } | |
435 | ||
436 | g_mutex_lock(&session->stop_mutex); | |
437 | session->abort_session = TRUE; | |
438 | g_mutex_unlock(&session->stop_mutex); | |
439 | ||
440 | return SR_OK; | |
441 | } | |
442 | ||
9f45fb3a | 443 | /** |
a1645fcd | 444 | * Debug helper. |
9f45fb3a | 445 | * |
996b0c72 | 446 | * @param packet The packet to show debugging information for. |
9f45fb3a | 447 | */ |
bf53457d | 448 | static void datafeed_dump(const struct sr_datafeed_packet *packet) |
7d2afd6c | 449 | { |
bf53457d JH |
450 | const struct sr_datafeed_logic *logic; |
451 | const struct sr_datafeed_analog *analog; | |
7d2afd6c BV |
452 | |
453 | switch (packet->type) { | |
454 | case SR_DF_HEADER: | |
a421dc1d | 455 | sr_dbg("bus: Received SR_DF_HEADER packet."); |
7d2afd6c BV |
456 | break; |
457 | case SR_DF_TRIGGER: | |
a421dc1d | 458 | sr_dbg("bus: Received SR_DF_TRIGGER packet."); |
7d2afd6c | 459 | break; |
c71bac3b | 460 | case SR_DF_META: |
a421dc1d | 461 | sr_dbg("bus: Received SR_DF_META packet."); |
ee7489d2 | 462 | break; |
7d2afd6c BV |
463 | case SR_DF_LOGIC: |
464 | logic = packet->payload; | |
a421dc1d UH |
465 | sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes).", |
466 | logic->length); | |
7d2afd6c | 467 | break; |
ee7489d2 BV |
468 | case SR_DF_ANALOG: |
469 | analog = packet->payload; | |
a421dc1d UH |
470 | sr_dbg("bus: Received SR_DF_ANALOG packet (%d samples).", |
471 | analog->num_samples); | |
ee7489d2 | 472 | break; |
7d2afd6c | 473 | case SR_DF_END: |
a421dc1d | 474 | sr_dbg("bus: Received SR_DF_END packet."); |
7d2afd6c | 475 | break; |
6ea7669c | 476 | case SR_DF_FRAME_BEGIN: |
a421dc1d | 477 | sr_dbg("bus: Received SR_DF_FRAME_BEGIN packet."); |
6ea7669c BV |
478 | break; |
479 | case SR_DF_FRAME_END: | |
a421dc1d | 480 | sr_dbg("bus: Received SR_DF_FRAME_END packet."); |
6ea7669c | 481 | break; |
7d2afd6c | 482 | default: |
a421dc1d | 483 | sr_dbg("bus: Received unknown packet type: %d.", packet->type); |
9f45fb3a | 484 | break; |
7d2afd6c | 485 | } |
7d2afd6c BV |
486 | } |
487 | ||
9f45fb3a | 488 | /** |
a1645fcd BV |
489 | * Send a packet to whatever is listening on the datafeed bus. |
490 | * | |
491 | * Hardware drivers use this to send a data packet to the frontend. | |
9f45fb3a | 492 | * |
6b2d8d3e | 493 | * @param sdi TODO. |
31ccebc4 | 494 | * @param packet The datafeed packet to send to the session bus. |
44dae539 | 495 | * |
e0508e67 | 496 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. |
b4bd7088 UH |
497 | * |
498 | * @private | |
9f45fb3a | 499 | */ |
de4d3f99 | 500 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, |
bf53457d | 501 | const struct sr_datafeed_packet *packet) |
a1bb33af UH |
502 | { |
503 | GSList *l; | |
2726474a | 504 | struct datafeed_callback *cb_struct; |
a1bb33af | 505 | |
de4d3f99 | 506 | if (!sdi) { |
a421dc1d | 507 | sr_err("%s: sdi was NULL", __func__); |
e0508e67 | 508 | return SR_ERR_ARG; |
9f45fb3a UH |
509 | } |
510 | ||
e0508e67 | 511 | if (!packet) { |
a421dc1d | 512 | sr_err("%s: packet was NULL", __func__); |
e0508e67 | 513 | return SR_ERR_ARG; |
9f45fb3a UH |
514 | } |
515 | ||
62c82025 | 516 | for (l = session->datafeed_callbacks; l; l = l->next) { |
18beaeff BV |
517 | if (sr_log_loglevel_get() >= SR_LOG_DBG) |
518 | datafeed_dump(packet); | |
2726474a ML |
519 | cb_struct = l->data; |
520 | cb_struct->cb(sdi, packet, cb_struct->cb_data); | |
a1bb33af | 521 | } |
9f45fb3a | 522 | |
e0508e67 | 523 | return SR_OK; |
a1bb33af UH |
524 | } |
525 | ||
6b2d8d3e UH |
526 | /** |
527 | * Add an event source for a file descriptor. | |
528 | * | |
529 | * @param pollfd The GPollFD. | |
530 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
531 | * @param cb Callback function to add. Must not be NULL. | |
532 | * @param cb_data Data for the callback function. Can be NULL. | |
533 | * @param poll_object TODO. | |
534 | * | |
535 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
536 | * SR_ERR_MALLOC upon memory allocation errors. | |
537 | */ | |
aac0ea25 | 538 | static int _sr_session_source_add(GPollFD *pollfd, int timeout, |
1a895c61 | 539 | sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object) |
544a4582 BV |
540 | { |
541 | struct source *new_sources, *s; | |
aac0ea25 | 542 | GPollFD *new_pollfds; |
544a4582 | 543 | |
d08490aa | 544 | if (!cb) { |
a421dc1d | 545 | sr_err("%s: cb was NULL", __func__); |
e0508e67 | 546 | return SR_ERR_ARG; |
9f45fb3a UH |
547 | } |
548 | ||
1f9813eb | 549 | /* Note: cb_data can be NULL, that's not a bug. */ |
9f45fb3a | 550 | |
2ac2e629 BV |
551 | new_pollfds = g_try_realloc(session->pollfds, |
552 | sizeof(GPollFD) * (session->num_sources + 1)); | |
0687dfcd | 553 | if (!new_pollfds) { |
a421dc1d | 554 | sr_err("%s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
555 | return SR_ERR_MALLOC; |
556 | } | |
557 | ||
b7e94111 | 558 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * |
2ac2e629 | 559 | (session->num_sources + 1)); |
9f45fb3a | 560 | if (!new_sources) { |
a421dc1d | 561 | sr_err("%s: new_sources malloc failed", __func__); |
e0508e67 | 562 | return SR_ERR_MALLOC; |
9f45fb3a | 563 | } |
544a4582 | 564 | |
b7e94111 LPC |
565 | new_pollfds[session->num_sources] = *pollfd; |
566 | s = &new_sources[session->num_sources++]; | |
544a4582 | 567 | s->timeout = timeout; |
d08490aa | 568 | s->cb = cb; |
1f9813eb | 569 | s->cb_data = cb_data; |
aac0ea25 | 570 | s->poll_object = poll_object; |
b7e94111 LPC |
571 | session->pollfds = new_pollfds; |
572 | session->sources = new_sources; | |
544a4582 | 573 | |
b7e94111 LPC |
574 | if (timeout != session->source_timeout && timeout > 0 |
575 | && (session->source_timeout == -1 || timeout < session->source_timeout)) | |
576 | session->source_timeout = timeout; | |
9f45fb3a | 577 | |
e0508e67 | 578 | return SR_OK; |
544a4582 BV |
579 | } |
580 | ||
9f45fb3a | 581 | /** |
6b2d8d3e | 582 | * Add an event source for a file descriptor. |
9f45fb3a | 583 | * |
aac0ea25 LPC |
584 | * @param fd The file descriptor. |
585 | * @param events Events to check for. | |
586 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
587 | * @param cb Callback function to add. Must not be NULL. | |
588 | * @param cb_data Data for the callback function. Can be NULL. | |
9f45fb3a | 589 | * |
aac0ea25 LPC |
590 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
591 | * SR_ERR_MALLOC upon memory allocation errors. | |
592 | */ | |
593 | SR_API int sr_session_source_add(int fd, int events, int timeout, | |
594 | sr_receive_data_callback_t cb, void *cb_data) | |
595 | { | |
596 | GPollFD p; | |
597 | ||
aac0ea25 LPC |
598 | p.fd = fd; |
599 | p.events = events; | |
aac0ea25 LPC |
600 | |
601 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd); | |
602 | } | |
603 | ||
604 | /** | |
1a895c61 | 605 | * Add an event source for a GPollFD. |
aac0ea25 | 606 | * |
aac0ea25 LPC |
607 | * @param pollfd The GPollFD. |
608 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
609 | * @param cb Callback function to add. Must not be NULL. | |
610 | * @param cb_data Data for the callback function. Can be NULL. | |
44dae539 | 611 | * |
e0508e67 | 612 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
aac0ea25 | 613 | * SR_ERR_MALLOC upon memory allocation errors. |
9f45fb3a | 614 | */ |
aac0ea25 LPC |
615 | SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout, |
616 | sr_receive_data_callback_t cb, void *cb_data) | |
617 | { | |
1a895c61 UH |
618 | return _sr_session_source_add(pollfd, timeout, cb, |
619 | cb_data, (gintptr)pollfd); | |
aac0ea25 LPC |
620 | } |
621 | ||
622 | /** | |
1a895c61 | 623 | * Add an event source for a GIOChannel. |
aac0ea25 | 624 | * |
aac0ea25 LPC |
625 | * @param channel The GIOChannel. |
626 | * @param events Events to poll on. | |
627 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
628 | * @param cb Callback function to add. Must not be NULL. | |
629 | * @param cb_data Data for the callback function. Can be NULL. | |
630 | * | |
631 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
632 | * SR_ERR_MALLOC upon memory allocation errors. | |
633 | */ | |
1a895c61 UH |
634 | SR_API int sr_session_source_add_channel(GIOChannel *channel, int events, |
635 | int timeout, sr_receive_data_callback_t cb, void *cb_data) | |
aac0ea25 LPC |
636 | { |
637 | GPollFD p; | |
638 | ||
639 | #ifdef _WIN32 | |
6b2d8d3e | 640 | g_io_channel_win32_make_pollfd(channel, events, &p); |
aac0ea25 LPC |
641 | #else |
642 | p.fd = g_io_channel_unix_get_fd(channel); | |
643 | p.events = events; | |
644 | #endif | |
645 | ||
646 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)channel); | |
647 | } | |
648 | ||
6b2d8d3e UH |
649 | /** |
650 | * Remove the source belonging to the specified channel. | |
651 | * | |
652 | * @todo Add more error checks and logging. | |
653 | * | |
654 | * @param channel The channel for which the source should be removed. | |
655 | * | |
656 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
657 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
658 | * internal errors. | |
659 | */ | |
aac0ea25 | 660 | static int _sr_session_source_remove(gintptr poll_object) |
544a4582 BV |
661 | { |
662 | struct source *new_sources; | |
0687dfcd | 663 | GPollFD *new_pollfds; |
b7e94111 | 664 | unsigned int old; |
544a4582 | 665 | |
b7e94111 | 666 | if (!session->sources || !session->num_sources) { |
a421dc1d | 667 | sr_err("%s: sources was NULL", __func__); |
0abee507 | 668 | return SR_ERR_BUG; |
e0508e67 UH |
669 | } |
670 | ||
b7e94111 LPC |
671 | for (old = 0; old < session->num_sources; old++) { |
672 | if (session->sources[old].poll_object == poll_object) | |
2bccd322 | 673 | break; |
9f45fb3a UH |
674 | } |
675 | ||
2bccd322 | 676 | /* fd not found, nothing to do */ |
b7e94111 | 677 | if (old == session->num_sources) |
2bccd322 LPC |
678 | return SR_OK; |
679 | ||
b7e94111 | 680 | session->num_sources -= 1; |
2bccd322 | 681 | |
b7e94111 LPC |
682 | if (old != session->num_sources) { |
683 | memmove(&session->pollfds[old], &session->pollfds[old+1], | |
684 | (session->num_sources - old) * sizeof(GPollFD)); | |
685 | memmove(&session->sources[old], &session->sources[old+1], | |
686 | (session->num_sources - old) * sizeof(struct source)); | |
9f45fb3a | 687 | } |
544a4582 | 688 | |
b7e94111 LPC |
689 | new_pollfds = g_try_realloc(session->pollfds, sizeof(GPollFD) * session->num_sources); |
690 | if (!new_pollfds && session->num_sources > 0) { | |
a421dc1d | 691 | sr_err("%s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
692 | return SR_ERR_MALLOC; |
693 | } | |
694 | ||
b7e94111 LPC |
695 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * session->num_sources); |
696 | if (!new_sources && session->num_sources > 0) { | |
a421dc1d | 697 | sr_err("%s: new_sources malloc failed", __func__); |
2bccd322 | 698 | return SR_ERR_MALLOC; |
544a4582 | 699 | } |
e0508e67 | 700 | |
b7e94111 LPC |
701 | session->pollfds = new_pollfds; |
702 | session->sources = new_sources; | |
2bccd322 | 703 | |
e0508e67 | 704 | return SR_OK; |
544a4582 | 705 | } |
aac0ea25 | 706 | |
6b2d8d3e | 707 | /** |
aac0ea25 LPC |
708 | * Remove the source belonging to the specified file descriptor. |
709 | * | |
1a895c61 | 710 | * @param fd The file descriptor for which the source should be removed. |
aac0ea25 LPC |
711 | * |
712 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
713 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
714 | * internal errors. | |
715 | */ | |
716 | SR_API int sr_session_source_remove(int fd) | |
717 | { | |
718 | return _sr_session_source_remove((gintptr)fd); | |
719 | } | |
720 | ||
721 | /** | |
722 | * Remove the source belonging to the specified poll descriptor. | |
723 | * | |
aac0ea25 LPC |
724 | * @param pollfd The poll descriptor for which the source should be removed. |
725 | * | |
726 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
727 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
728 | * internal errors. | |
729 | */ | |
730 | SR_API int sr_session_source_remove_pollfd(GPollFD *pollfd) | |
731 | { | |
732 | return _sr_session_source_remove((gintptr)pollfd); | |
733 | } | |
734 | ||
6b2d8d3e | 735 | /** |
aac0ea25 LPC |
736 | * Remove the source belonging to the specified channel. |
737 | * | |
1a895c61 | 738 | * @param channel The channel for which the source should be removed. |
aac0ea25 LPC |
739 | * |
740 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
741 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
742 | * internal errors. | |
743 | */ | |
744 | SR_API int sr_session_source_remove_channel(GIOChannel *channel) | |
745 | { | |
746 | return _sr_session_source_remove((gintptr)channel); | |
747 | } | |
7b870c38 UH |
748 | |
749 | /** @} */ |