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Commit | Line | Data |
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a1bb33af UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
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 | |
7b870c38 UH |
28 | /** |
29 | * @defgroup grp_session Session handling | |
30 | * | |
31 | * Creating, using, or destroying libsigrok sessions. | |
32 | * | |
33 | * @{ | |
34 | */ | |
35 | ||
544a4582 | 36 | struct source { |
544a4582 | 37 | int timeout; |
d08490aa | 38 | sr_receive_data_callback_t cb; |
1f9813eb | 39 | void *cb_data; |
aac0ea25 LPC |
40 | |
41 | /* This is used to keep track of the object (fd, pollfd or channel) which is | |
42 | * being polled and will be used to match the source when removing it again. | |
43 | */ | |
44 | gintptr poll_object; | |
544a4582 BV |
45 | }; |
46 | ||
7d658874 | 47 | /* There can only be one session at a time. */ |
a0ecd83b | 48 | /* 'session' is not static, it's used elsewhere (via 'extern'). */ |
2872d21e | 49 | struct sr_session *session; |
544a4582 | 50 | |
9f45fb3a UH |
51 | /** |
52 | * Create a new session. | |
53 | * | |
9f45fb3a UH |
54 | * TODO: Should it use the file-global "session" variable or take an argument? |
55 | * The same question applies to all the other session functions. | |
56 | * | |
57 | * @return A pointer to the newly allocated session, or NULL upon errors. | |
58 | */ | |
1a081ca6 | 59 | SR_API struct sr_session *sr_session_new(void) |
a1bb33af | 60 | { |
133a37bf | 61 | if (!(session = g_try_malloc0(sizeof(struct sr_session)))) { |
9f45fb3a UH |
62 | sr_err("session: %s: session malloc failed", __func__); |
63 | return NULL; /* TODO: SR_ERR_MALLOC? */ | |
64 | } | |
a1bb33af | 65 | |
b7e94111 LPC |
66 | session->source_timeout = -1; |
67 | ||
a1bb33af UH |
68 | return session; |
69 | } | |
70 | ||
9f45fb3a UH |
71 | /** |
72 | * Destroy the current session. | |
73 | * | |
74 | * This frees up all memory used by the session. | |
75 | * | |
e0508e67 | 76 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 77 | */ |
1a081ca6 | 78 | SR_API int sr_session_destroy(void) |
a1bb33af | 79 | { |
9f45fb3a | 80 | if (!session) { |
133a37bf | 81 | sr_err("session: %s: session was NULL", __func__); |
e0508e67 | 82 | return SR_ERR_BUG; |
9f45fb3a UH |
83 | } |
84 | ||
ed229aaa | 85 | sr_session_dev_remove_all(); |
a1bb33af | 86 | |
9f45fb3a UH |
87 | /* TODO: Error checks needed? */ |
88 | ||
aa4b1107 | 89 | /* TODO: Loop over protocol decoders and free them. */ |
a1bb33af UH |
90 | |
91 | g_free(session); | |
9f45fb3a | 92 | session = NULL; |
e0508e67 UH |
93 | |
94 | return SR_OK; | |
a1bb33af UH |
95 | } |
96 | ||
de4d3f99 | 97 | static void sr_dev_close(struct sr_dev_inst *sdi) |
ed229aaa | 98 | { |
e8d3d6c8 | 99 | if (sdi->driver && sdi->driver->dev_close) |
de4d3f99 | 100 | sdi->driver->dev_close(sdi); |
ed229aaa LPC |
101 | } |
102 | ||
9f45fb3a UH |
103 | /** |
104 | * Remove all the devices from the current session. TODO? | |
105 | * | |
106 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
107 | * exists after this function returns. | |
108 | * | |
e0508e67 | 109 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 110 | */ |
01c3e9db | 111 | SR_API int sr_session_dev_remove_all(void) |
a1bb33af | 112 | { |
9f45fb3a | 113 | if (!session) { |
133a37bf | 114 | sr_err("session: %s: session was NULL", __func__); |
e0508e67 | 115 | return SR_ERR_BUG; |
9f45fb3a UH |
116 | } |
117 | ||
ed229aaa | 118 | g_slist_free_full(session->devs, (GDestroyNotify)sr_dev_close); |
bb7ef793 | 119 | session->devs = NULL; |
e0508e67 UH |
120 | |
121 | return SR_OK; | |
a1bb33af UH |
122 | } |
123 | ||
9f45fb3a | 124 | /** |
9c5332d2 | 125 | * Add a device instance to the current session. |
9f45fb3a | 126 | * |
9c5332d2 | 127 | * @param sdi The device instance to add to the current session. Must not |
de4d3f99 BV |
128 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must |
129 | * not be NULL. | |
9f45fb3a UH |
130 | * |
131 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
132 | */ | |
de4d3f99 | 133 | SR_API int sr_session_dev_add(const struct sr_dev_inst *sdi) |
a1bb33af UH |
134 | { |
135 | int ret; | |
136 | ||
de4d3f99 BV |
137 | if (!sdi) { |
138 | sr_err("session: %s: sdi was NULL", __func__); | |
9f45fb3a UH |
139 | return SR_ERR_ARG; |
140 | } | |
141 | ||
d6eb0c33 UH |
142 | if (!session) { |
143 | sr_err("session: %s: session was NULL", __func__); | |
144 | return SR_ERR_BUG; | |
145 | } | |
146 | ||
de4d3f99 BV |
147 | /* If sdi->driver is NULL, this is a virtual device. */ |
148 | if (!sdi->driver) { | |
149 | sr_dbg("session: %s: sdi->driver was NULL, this seems to be " | |
d6eb0c33 UH |
150 | "a virtual device; continuing", __func__); |
151 | /* Just add the device, don't run dev_open(). */ | |
de4d3f99 | 152 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
d6eb0c33 | 153 | return SR_OK; |
9f45fb3a UH |
154 | } |
155 | ||
de4d3f99 BV |
156 | /* sdi->driver is non-NULL (i.e. we have a real device). */ |
157 | if (!sdi->driver->dev_open) { | |
158 | sr_err("session: %s: sdi->driver->dev_open was NULL", __func__); | |
8ec95d22 | 159 | return SR_ERR_BUG; |
9f45fb3a UH |
160 | } |
161 | ||
de4d3f99 | 162 | if ((ret = sdi->driver->dev_open((struct sr_dev_inst *)sdi)) != SR_OK) { |
e7eb703f | 163 | sr_err("session: %s: dev_open failed (%d)", __func__, ret); |
9f45fb3a | 164 | return ret; |
aa4b1107 | 165 | } |
a1bb33af | 166 | |
de4d3f99 | 167 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
aa4b1107 | 168 | |
e46b8fb1 | 169 | return SR_OK; |
a1bb33af UH |
170 | } |
171 | ||
9f45fb3a | 172 | /** |
01c3e9db | 173 | * Remove all datafeed callbacks in the current session. |
9f45fb3a | 174 | * |
e0508e67 | 175 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 176 | */ |
01c3e9db | 177 | SR_API int sr_session_datafeed_callback_remove_all(void) |
a1bb33af | 178 | { |
9f45fb3a UH |
179 | if (!session) { |
180 | sr_err("session: %s: session was NULL", __func__); | |
e0508e67 | 181 | return SR_ERR_BUG; |
9f45fb3a UH |
182 | } |
183 | ||
a1bb33af UH |
184 | g_slist_free(session->datafeed_callbacks); |
185 | session->datafeed_callbacks = NULL; | |
e0508e67 UH |
186 | |
187 | return SR_OK; | |
a1bb33af UH |
188 | } |
189 | ||
9f45fb3a UH |
190 | /** |
191 | * Add a datafeed callback to the current session. | |
192 | * | |
d08490aa | 193 | * @param cb Function to call when a chunk of data is received. |
0abee507 | 194 | * Must not be NULL. |
a1645fcd | 195 | * |
e0508e67 | 196 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 197 | */ |
d08490aa | 198 | SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb) |
a1bb33af | 199 | { |
9f45fb3a UH |
200 | if (!session) { |
201 | sr_err("session: %s: session was NULL", __func__); | |
e0508e67 | 202 | return SR_ERR_BUG; |
9f45fb3a UH |
203 | } |
204 | ||
0abee507 UH |
205 | if (!cb) { |
206 | sr_err("session: %s: cb was NULL", __func__); | |
207 | return SR_ERR_ARG; | |
208 | } | |
9f45fb3a | 209 | |
62c82025 | 210 | session->datafeed_callbacks = |
d08490aa | 211 | g_slist_append(session->datafeed_callbacks, cb); |
e0508e67 UH |
212 | |
213 | return SR_OK; | |
a1bb33af UH |
214 | } |
215 | ||
e0508e67 | 216 | static int sr_session_run_poll(void) |
544a4582 | 217 | { |
b7e94111 LPC |
218 | unsigned int i; |
219 | int ret; | |
544a4582 | 220 | |
2cbeb2b7 BV |
221 | while (session->num_sources > 0) { |
222 | ret = g_poll(session->pollfds, session->num_sources, | |
223 | session->source_timeout); | |
b7e94111 LPC |
224 | for (i = 0; i < session->num_sources; i++) { |
225 | if (session->pollfds[i].revents > 0 || (ret == 0 | |
226 | && session->source_timeout == session->sources[i].timeout)) { | |
544a4582 BV |
227 | /* |
228 | * Invoke the source's callback on an event, | |
2cbeb2b7 | 229 | * or if the poll timed out and this source |
544a4582 BV |
230 | * asked for that timeout. |
231 | */ | |
2cbeb2b7 BV |
232 | if (!session->sources[i].cb(session->pollfds[i].fd, |
233 | session->pollfds[i].revents, | |
234 | session->sources[i].cb_data)) | |
b7e94111 | 235 | sr_session_source_remove(session->sources[i].poll_object); |
544a4582 BV |
236 | } |
237 | } | |
238 | } | |
e0508e67 UH |
239 | |
240 | return SR_OK; | |
544a4582 BV |
241 | } |
242 | ||
9f45fb3a UH |
243 | /** |
244 | * Start a session. | |
245 | * | |
a1645fcd | 246 | * There can only be one session at a time. |
9f45fb3a UH |
247 | * |
248 | * @return SR_OK upon success, SR_ERR upon errors. | |
249 | */ | |
1a081ca6 | 250 | SR_API int sr_session_start(void) |
7d658874 | 251 | { |
de4d3f99 | 252 | struct sr_dev_inst *sdi; |
7d658874 BV |
253 | GSList *l; |
254 | int ret; | |
255 | ||
9f45fb3a UH |
256 | if (!session) { |
257 | sr_err("session: %s: session was NULL; a session must be " | |
de4d3f99 | 258 | "created before starting it.", __func__); |
0abee507 | 259 | return SR_ERR_BUG; |
9f45fb3a UH |
260 | } |
261 | ||
bb7ef793 | 262 | if (!session->devs) { |
bb7ef793 | 263 | sr_err("session: %s: session->devs was NULL; a session " |
9f45fb3a | 264 | "cannot be started without devices.", __func__); |
0abee507 | 265 | return SR_ERR_BUG; |
9f45fb3a UH |
266 | } |
267 | ||
b08024a8 | 268 | sr_info("session: starting"); |
9f45fb3a | 269 | |
bb7ef793 | 270 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
271 | sdi = l->data; |
272 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
446a0372 | 273 | sr_err("session: %s: could not start an acquisition " |
9f45fb3a | 274 | "(%d)", __func__, ret); |
7d658874 | 275 | break; |
9f45fb3a | 276 | } |
7d658874 BV |
277 | } |
278 | ||
9f45fb3a UH |
279 | /* TODO: What if there are multiple devices? Which return code? */ |
280 | ||
7d658874 BV |
281 | return ret; |
282 | } | |
283 | ||
9f45fb3a UH |
284 | /** |
285 | * Run the session. | |
286 | * | |
9f45fb3a UH |
287 | * TODO: Various error checks etc. |
288 | * | |
e0508e67 | 289 | * @return SR_OK upon success, SR_ERR_BUG upon errors. |
9f45fb3a | 290 | */ |
1a081ca6 | 291 | SR_API int sr_session_run(void) |
7d658874 | 292 | { |
9f45fb3a UH |
293 | if (!session) { |
294 | sr_err("session: %s: session was NULL; a session must be " | |
295 | "created first, before running it.", __func__); | |
e0508e67 | 296 | return SR_ERR_BUG; |
9f45fb3a UH |
297 | } |
298 | ||
bb7ef793 | 299 | if (!session->devs) { |
9f45fb3a | 300 | /* TODO: Actually the case? */ |
bb7ef793 | 301 | sr_err("session: %s: session->devs was NULL; a session " |
9f45fb3a | 302 | "cannot be run without devices.", __func__); |
e0508e67 | 303 | return SR_ERR_BUG; |
9f45fb3a UH |
304 | } |
305 | ||
b08024a8 | 306 | sr_info("session: running"); |
7d658874 | 307 | |
9f45fb3a | 308 | /* Do we have real sources? */ |
b7e94111 | 309 | if (session->num_sources == 1 && session->pollfds[0].fd == -1) { |
9f45fb3a | 310 | /* Dummy source, freewheel over it. */ |
2cbeb2b7 | 311 | while (session->num_sources) |
b7e94111 | 312 | session->sources[0].cb(-1, 0, session->sources[0].cb_data); |
9f45fb3a UH |
313 | } else { |
314 | /* Real sources, use g_poll() main loop. */ | |
8a2efef2 | 315 | sr_session_run_poll(); |
9f45fb3a UH |
316 | } |
317 | ||
e0508e67 | 318 | return SR_OK; |
7d658874 BV |
319 | } |
320 | ||
9f45fb3a UH |
321 | /** |
322 | * Halt the current session. | |
323 | * | |
9ffbde0e LPC |
324 | * This function is deprecated and should not be used in new code, use |
325 | * sr_session_stop() instead. The behaviour of this function is identical to | |
326 | * sr_session_stop(). | |
e0508e67 UH |
327 | * |
328 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
9f45fb3a | 329 | */ |
1a081ca6 | 330 | SR_API int sr_session_halt(void) |
544a4582 | 331 | { |
9ffbde0e | 332 | return sr_session_stop(); |
544a4582 BV |
333 | } |
334 | ||
9f45fb3a UH |
335 | /** |
336 | * Stop the current session. | |
337 | * | |
a1645fcd | 338 | * The current session is stopped immediately, with all acquisition sessions |
c09f0b57 | 339 | * being stopped and hardware drivers cleaned up. |
9f45fb3a | 340 | * |
e0508e67 | 341 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 342 | */ |
1a081ca6 | 343 | SR_API int sr_session_stop(void) |
a1bb33af | 344 | { |
de4d3f99 | 345 | struct sr_dev_inst *sdi; |
a1bb33af UH |
346 | GSList *l; |
347 | ||
9f45fb3a UH |
348 | if (!session) { |
349 | sr_err("session: %s: session was NULL", __func__); | |
e0508e67 | 350 | return SR_ERR_BUG; |
9f45fb3a UH |
351 | } |
352 | ||
b08024a8 | 353 | sr_info("session: stopping"); |
e0508e67 | 354 | |
bb7ef793 | 355 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
356 | sdi = l->data; |
357 | if (sdi->driver) { | |
358 | if (sdi->driver->dev_acquisition_stop) | |
359 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
8c76be53 | 360 | } |
a1bb33af | 361 | } |
9f45fb3a | 362 | |
e0508e67 | 363 | return SR_OK; |
a1bb33af UH |
364 | } |
365 | ||
9f45fb3a | 366 | /** |
a1645fcd | 367 | * Debug helper. |
9f45fb3a | 368 | * |
996b0c72 | 369 | * @param packet The packet to show debugging information for. |
9f45fb3a | 370 | */ |
18beaeff | 371 | static void datafeed_dump(struct sr_datafeed_packet *packet) |
7d2afd6c BV |
372 | { |
373 | struct sr_datafeed_logic *logic; | |
ee7489d2 | 374 | struct sr_datafeed_analog *analog; |
7d2afd6c BV |
375 | |
376 | switch (packet->type) { | |
377 | case SR_DF_HEADER: | |
378 | sr_dbg("bus: received SR_DF_HEADER"); | |
379 | break; | |
380 | case SR_DF_TRIGGER: | |
01469707 | 381 | sr_dbg("bus: received SR_DF_TRIGGER"); |
7d2afd6c | 382 | break; |
ee7489d2 BV |
383 | case SR_DF_META_LOGIC: |
384 | sr_dbg("bus: received SR_DF_META_LOGIC"); | |
385 | break; | |
7d2afd6c BV |
386 | case SR_DF_LOGIC: |
387 | logic = packet->payload; | |
e0508e67 | 388 | /* TODO: Check for logic != NULL. */ |
01469707 | 389 | sr_dbg("bus: received SR_DF_LOGIC %" PRIu64 " bytes", logic->length); |
7d2afd6c | 390 | break; |
ee7489d2 | 391 | case SR_DF_META_ANALOG: |
dfd8f56e | 392 | sr_dbg("bus: received SR_DF_META_ANALOG"); |
ee7489d2 BV |
393 | break; |
394 | case SR_DF_ANALOG: | |
395 | analog = packet->payload; | |
396 | /* TODO: Check for analog != NULL. */ | |
397 | sr_dbg("bus: received SR_DF_ANALOG %d samples", analog->num_samples); | |
398 | break; | |
7d2afd6c BV |
399 | case SR_DF_END: |
400 | sr_dbg("bus: received SR_DF_END"); | |
401 | break; | |
6ea7669c BV |
402 | case SR_DF_FRAME_BEGIN: |
403 | sr_dbg("bus: received SR_DF_FRAME_BEGIN"); | |
404 | break; | |
405 | case SR_DF_FRAME_END: | |
406 | sr_dbg("bus: received SR_DF_FRAME_END"); | |
407 | break; | |
7d2afd6c | 408 | default: |
18beaeff | 409 | sr_dbg("bus: received unknown packet type %d", packet->type); |
9f45fb3a | 410 | break; |
7d2afd6c | 411 | } |
7d2afd6c BV |
412 | } |
413 | ||
9f45fb3a | 414 | /** |
a1645fcd BV |
415 | * Send a packet to whatever is listening on the datafeed bus. |
416 | * | |
417 | * Hardware drivers use this to send a data packet to the frontend. | |
9f45fb3a | 418 | * |
bb7ef793 | 419 | * @param dev TODO. |
31ccebc4 | 420 | * @param packet The datafeed packet to send to the session bus. |
44dae539 | 421 | * |
e0508e67 | 422 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. |
b4bd7088 UH |
423 | * |
424 | * @private | |
9f45fb3a | 425 | */ |
de4d3f99 | 426 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, |
31ccebc4 | 427 | struct sr_datafeed_packet *packet) |
a1bb33af UH |
428 | { |
429 | GSList *l; | |
d08490aa | 430 | sr_datafeed_callback_t cb; |
a1bb33af | 431 | |
de4d3f99 BV |
432 | if (!sdi) { |
433 | sr_err("session: %s: sdi was NULL", __func__); | |
e0508e67 | 434 | return SR_ERR_ARG; |
9f45fb3a UH |
435 | } |
436 | ||
e0508e67 UH |
437 | if (!packet) { |
438 | sr_err("session: %s: packet was NULL", __func__); | |
439 | return SR_ERR_ARG; | |
9f45fb3a UH |
440 | } |
441 | ||
62c82025 | 442 | for (l = session->datafeed_callbacks; l; l = l->next) { |
18beaeff BV |
443 | if (sr_log_loglevel_get() >= SR_LOG_DBG) |
444 | datafeed_dump(packet); | |
a1bb33af | 445 | cb = l->data; |
de4d3f99 | 446 | cb(sdi, packet); |
a1bb33af | 447 | } |
9f45fb3a | 448 | |
e0508e67 | 449 | return SR_OK; |
a1bb33af UH |
450 | } |
451 | ||
aac0ea25 | 452 | static int _sr_session_source_add(GPollFD *pollfd, int timeout, |
1a895c61 | 453 | sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object) |
544a4582 BV |
454 | { |
455 | struct source *new_sources, *s; | |
aac0ea25 | 456 | GPollFD *new_pollfds; |
544a4582 | 457 | |
d08490aa UH |
458 | if (!cb) { |
459 | sr_err("session: %s: cb was NULL", __func__); | |
e0508e67 | 460 | return SR_ERR_ARG; |
9f45fb3a UH |
461 | } |
462 | ||
1f9813eb | 463 | /* Note: cb_data can be NULL, that's not a bug. */ |
9f45fb3a | 464 | |
2ac2e629 BV |
465 | new_pollfds = g_try_realloc(session->pollfds, |
466 | sizeof(GPollFD) * (session->num_sources + 1)); | |
0687dfcd | 467 | if (!new_pollfds) { |
1a895c61 | 468 | sr_err("session: %s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
469 | return SR_ERR_MALLOC; |
470 | } | |
471 | ||
b7e94111 | 472 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * |
2ac2e629 | 473 | (session->num_sources + 1)); |
9f45fb3a UH |
474 | if (!new_sources) { |
475 | sr_err("session: %s: new_sources malloc failed", __func__); | |
e0508e67 | 476 | return SR_ERR_MALLOC; |
9f45fb3a | 477 | } |
544a4582 | 478 | |
b7e94111 LPC |
479 | new_pollfds[session->num_sources] = *pollfd; |
480 | s = &new_sources[session->num_sources++]; | |
544a4582 | 481 | s->timeout = timeout; |
d08490aa | 482 | s->cb = cb; |
1f9813eb | 483 | s->cb_data = cb_data; |
aac0ea25 | 484 | s->poll_object = poll_object; |
b7e94111 LPC |
485 | session->pollfds = new_pollfds; |
486 | session->sources = new_sources; | |
544a4582 | 487 | |
b7e94111 LPC |
488 | if (timeout != session->source_timeout && timeout > 0 |
489 | && (session->source_timeout == -1 || timeout < session->source_timeout)) | |
490 | session->source_timeout = timeout; | |
9f45fb3a | 491 | |
e0508e67 | 492 | return SR_OK; |
544a4582 BV |
493 | } |
494 | ||
9f45fb3a | 495 | /** |
aac0ea25 | 496 | * Add a event source for a file descriptor. |
9f45fb3a | 497 | * |
aac0ea25 LPC |
498 | * @param fd The file descriptor. |
499 | * @param events Events to check for. | |
500 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
501 | * @param cb Callback function to add. Must not be NULL. | |
502 | * @param cb_data Data for the callback function. Can be NULL. | |
9f45fb3a | 503 | * |
aac0ea25 LPC |
504 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
505 | * SR_ERR_MALLOC upon memory allocation errors. | |
506 | */ | |
507 | SR_API int sr_session_source_add(int fd, int events, int timeout, | |
508 | sr_receive_data_callback_t cb, void *cb_data) | |
509 | { | |
510 | GPollFD p; | |
511 | ||
aac0ea25 LPC |
512 | p.fd = fd; |
513 | p.events = events; | |
aac0ea25 LPC |
514 | |
515 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd); | |
516 | } | |
517 | ||
518 | /** | |
1a895c61 | 519 | * Add an event source for a GPollFD. |
aac0ea25 LPC |
520 | * |
521 | * TODO: More error checks etc. | |
522 | * | |
523 | * @param pollfd The GPollFD. | |
524 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
525 | * @param cb Callback function to add. Must not be NULL. | |
526 | * @param cb_data Data for the callback function. Can be NULL. | |
44dae539 | 527 | * |
e0508e67 | 528 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
aac0ea25 | 529 | * SR_ERR_MALLOC upon memory allocation errors. |
9f45fb3a | 530 | */ |
aac0ea25 LPC |
531 | SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout, |
532 | sr_receive_data_callback_t cb, void *cb_data) | |
533 | { | |
1a895c61 UH |
534 | return _sr_session_source_add(pollfd, timeout, cb, |
535 | cb_data, (gintptr)pollfd); | |
aac0ea25 LPC |
536 | } |
537 | ||
538 | /** | |
1a895c61 | 539 | * Add an event source for a GIOChannel. |
aac0ea25 LPC |
540 | * |
541 | * TODO: More error checks etc. | |
542 | * | |
543 | * @param channel The GIOChannel. | |
544 | * @param events Events to poll on. | |
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 | */ | |
1a895c61 UH |
552 | SR_API int sr_session_source_add_channel(GIOChannel *channel, int events, |
553 | int timeout, sr_receive_data_callback_t cb, void *cb_data) | |
aac0ea25 LPC |
554 | { |
555 | GPollFD p; | |
556 | ||
557 | #ifdef _WIN32 | |
558 | g_io_channel_win32_make_pollfd(channel, | |
559 | events, &p); | |
560 | #else | |
561 | p.fd = g_io_channel_unix_get_fd(channel); | |
562 | p.events = events; | |
563 | #endif | |
564 | ||
565 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)channel); | |
566 | } | |
567 | ||
568 | ||
569 | static int _sr_session_source_remove(gintptr poll_object) | |
544a4582 BV |
570 | { |
571 | struct source *new_sources; | |
0687dfcd | 572 | GPollFD *new_pollfds; |
b7e94111 | 573 | unsigned int old; |
544a4582 | 574 | |
b7e94111 | 575 | if (!session->sources || !session->num_sources) { |
e0508e67 | 576 | sr_err("session: %s: sources was NULL", __func__); |
0abee507 | 577 | return SR_ERR_BUG; |
e0508e67 UH |
578 | } |
579 | ||
b7e94111 LPC |
580 | for (old = 0; old < session->num_sources; old++) { |
581 | if (session->sources[old].poll_object == poll_object) | |
2bccd322 | 582 | break; |
9f45fb3a UH |
583 | } |
584 | ||
2bccd322 | 585 | /* fd not found, nothing to do */ |
b7e94111 | 586 | if (old == session->num_sources) |
2bccd322 LPC |
587 | return SR_OK; |
588 | ||
b7e94111 | 589 | session->num_sources -= 1; |
2bccd322 | 590 | |
b7e94111 LPC |
591 | if (old != session->num_sources) { |
592 | memmove(&session->pollfds[old], &session->pollfds[old+1], | |
593 | (session->num_sources - old) * sizeof(GPollFD)); | |
594 | memmove(&session->sources[old], &session->sources[old+1], | |
595 | (session->num_sources - old) * sizeof(struct source)); | |
9f45fb3a | 596 | } |
544a4582 | 597 | |
b7e94111 LPC |
598 | new_pollfds = g_try_realloc(session->pollfds, sizeof(GPollFD) * session->num_sources); |
599 | if (!new_pollfds && session->num_sources > 0) { | |
1a895c61 | 600 | sr_err("session: %s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
601 | return SR_ERR_MALLOC; |
602 | } | |
603 | ||
b7e94111 LPC |
604 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * session->num_sources); |
605 | if (!new_sources && session->num_sources > 0) { | |
2bccd322 LPC |
606 | sr_err("session: %s: new_sources malloc failed", __func__); |
607 | return SR_ERR_MALLOC; | |
544a4582 | 608 | } |
e0508e67 | 609 | |
b7e94111 LPC |
610 | session->pollfds = new_pollfds; |
611 | session->sources = new_sources; | |
2bccd322 | 612 | |
e0508e67 | 613 | return SR_OK; |
544a4582 | 614 | } |
aac0ea25 LPC |
615 | |
616 | /* | |
617 | * Remove the source belonging to the specified file descriptor. | |
618 | * | |
619 | * TODO: More error checks. | |
620 | * | |
1a895c61 | 621 | * @param fd The file descriptor for which the source should be removed. |
aac0ea25 LPC |
622 | * |
623 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
624 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
625 | * internal errors. | |
626 | */ | |
627 | SR_API int sr_session_source_remove(int fd) | |
628 | { | |
629 | return _sr_session_source_remove((gintptr)fd); | |
630 | } | |
631 | ||
632 | /** | |
633 | * Remove the source belonging to the specified poll descriptor. | |
634 | * | |
635 | * TODO: More error checks. | |
636 | * | |
637 | * @param pollfd The poll descriptor for which the source should be removed. | |
638 | * | |
639 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
640 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
641 | * internal errors. | |
642 | */ | |
643 | SR_API int sr_session_source_remove_pollfd(GPollFD *pollfd) | |
644 | { | |
645 | return _sr_session_source_remove((gintptr)pollfd); | |
646 | } | |
647 | ||
648 | /* | |
649 | * Remove the source belonging to the specified channel. | |
650 | * | |
651 | * TODO: More error checks. | |
652 | * | |
1a895c61 | 653 | * @param channel The channel for which the source should be removed. |
aac0ea25 LPC |
654 | * |
655 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
656 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
657 | * internal errors. | |
658 | */ | |
659 | SR_API int sr_session_source_remove_channel(GIOChannel *channel) | |
660 | { | |
661 | return _sr_session_source_remove((gintptr)channel); | |
662 | } | |
7b870c38 UH |
663 | |
664 | /** @} */ |