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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 | |
393fb9cb UH |
28 | /** |
29 | * @file | |
30 | * | |
31 | * Creating, using, or destroying libsigrok sessions. | |
32 | */ | |
33 | ||
7b870c38 UH |
34 | /** |
35 | * @defgroup grp_session Session handling | |
36 | * | |
37 | * Creating, using, or destroying libsigrok sessions. | |
38 | * | |
39 | * @{ | |
40 | */ | |
41 | ||
544a4582 | 42 | struct source { |
544a4582 | 43 | int timeout; |
d08490aa | 44 | sr_receive_data_callback_t cb; |
1f9813eb | 45 | void *cb_data; |
aac0ea25 LPC |
46 | |
47 | /* This is used to keep track of the object (fd, pollfd or channel) which is | |
48 | * being polled and will be used to match the source when removing it again. | |
49 | */ | |
50 | gintptr poll_object; | |
544a4582 BV |
51 | }; |
52 | ||
7d658874 | 53 | /* There can only be one session at a time. */ |
a0ecd83b | 54 | /* 'session' is not static, it's used elsewhere (via 'extern'). */ |
2872d21e | 55 | struct sr_session *session; |
544a4582 | 56 | |
9f45fb3a UH |
57 | /** |
58 | * Create a new session. | |
59 | * | |
6b2d8d3e | 60 | * @todo Should it use the file-global "session" variable or take an argument? |
9f45fb3a UH |
61 | * The same question applies to all the other session functions. |
62 | * | |
63 | * @return A pointer to the newly allocated session, or NULL upon errors. | |
64 | */ | |
1a081ca6 | 65 | SR_API struct sr_session *sr_session_new(void) |
a1bb33af | 66 | { |
133a37bf | 67 | if (!(session = g_try_malloc0(sizeof(struct sr_session)))) { |
9f45fb3a UH |
68 | sr_err("session: %s: session malloc failed", __func__); |
69 | return NULL; /* TODO: SR_ERR_MALLOC? */ | |
70 | } | |
a1bb33af | 71 | |
b7e94111 LPC |
72 | session->source_timeout = -1; |
73 | ||
a1bb33af UH |
74 | return session; |
75 | } | |
76 | ||
9f45fb3a UH |
77 | /** |
78 | * Destroy the current session. | |
79 | * | |
80 | * This frees up all memory used by the session. | |
81 | * | |
e0508e67 | 82 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 83 | */ |
1a081ca6 | 84 | SR_API int sr_session_destroy(void) |
a1bb33af | 85 | { |
9f45fb3a | 86 | if (!session) { |
133a37bf | 87 | sr_err("session: %s: session was NULL", __func__); |
e0508e67 | 88 | return SR_ERR_BUG; |
9f45fb3a UH |
89 | } |
90 | ||
ed229aaa | 91 | sr_session_dev_remove_all(); |
a1bb33af | 92 | |
9f45fb3a UH |
93 | /* TODO: Error checks needed? */ |
94 | ||
a1bb33af | 95 | g_free(session); |
9f45fb3a | 96 | session = NULL; |
e0508e67 UH |
97 | |
98 | return SR_OK; | |
a1bb33af UH |
99 | } |
100 | ||
de4d3f99 | 101 | static void sr_dev_close(struct sr_dev_inst *sdi) |
ed229aaa | 102 | { |
e8d3d6c8 | 103 | if (sdi->driver && sdi->driver->dev_close) |
de4d3f99 | 104 | sdi->driver->dev_close(sdi); |
ed229aaa LPC |
105 | } |
106 | ||
9f45fb3a | 107 | /** |
6b2d8d3e | 108 | * Remove all the devices from the current session. |
9f45fb3a UH |
109 | * |
110 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
111 | * exists after this function returns. | |
112 | * | |
e0508e67 | 113 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 114 | */ |
01c3e9db | 115 | SR_API int sr_session_dev_remove_all(void) |
a1bb33af | 116 | { |
9f45fb3a | 117 | if (!session) { |
133a37bf | 118 | sr_err("session: %s: session was NULL", __func__); |
e0508e67 | 119 | return SR_ERR_BUG; |
9f45fb3a UH |
120 | } |
121 | ||
ed229aaa | 122 | g_slist_free_full(session->devs, (GDestroyNotify)sr_dev_close); |
bb7ef793 | 123 | session->devs = NULL; |
e0508e67 UH |
124 | |
125 | return SR_OK; | |
a1bb33af UH |
126 | } |
127 | ||
9f45fb3a | 128 | /** |
9c5332d2 | 129 | * Add a device instance to the current session. |
9f45fb3a | 130 | * |
9c5332d2 | 131 | * @param sdi The device instance to add to the current session. Must not |
de4d3f99 BV |
132 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must |
133 | * not be NULL. | |
9f45fb3a UH |
134 | * |
135 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
136 | */ | |
de4d3f99 | 137 | SR_API int sr_session_dev_add(const struct sr_dev_inst *sdi) |
a1bb33af UH |
138 | { |
139 | int ret; | |
140 | ||
de4d3f99 BV |
141 | if (!sdi) { |
142 | sr_err("session: %s: sdi was NULL", __func__); | |
9f45fb3a UH |
143 | return SR_ERR_ARG; |
144 | } | |
145 | ||
d6eb0c33 UH |
146 | if (!session) { |
147 | sr_err("session: %s: session was NULL", __func__); | |
148 | return SR_ERR_BUG; | |
149 | } | |
150 | ||
de4d3f99 BV |
151 | /* If sdi->driver is NULL, this is a virtual device. */ |
152 | if (!sdi->driver) { | |
153 | sr_dbg("session: %s: sdi->driver was NULL, this seems to be " | |
d6eb0c33 UH |
154 | "a virtual device; continuing", __func__); |
155 | /* Just add the device, don't run dev_open(). */ | |
de4d3f99 | 156 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
d6eb0c33 | 157 | return SR_OK; |
9f45fb3a UH |
158 | } |
159 | ||
de4d3f99 BV |
160 | /* sdi->driver is non-NULL (i.e. we have a real device). */ |
161 | if (!sdi->driver->dev_open) { | |
162 | sr_err("session: %s: sdi->driver->dev_open was NULL", __func__); | |
8ec95d22 | 163 | return SR_ERR_BUG; |
9f45fb3a UH |
164 | } |
165 | ||
de4d3f99 | 166 | if ((ret = sdi->driver->dev_open((struct sr_dev_inst *)sdi)) != SR_OK) { |
e7eb703f | 167 | sr_err("session: %s: dev_open failed (%d)", __func__, ret); |
9f45fb3a | 168 | return ret; |
aa4b1107 | 169 | } |
a1bb33af | 170 | |
de4d3f99 | 171 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
aa4b1107 | 172 | |
e46b8fb1 | 173 | return SR_OK; |
a1bb33af UH |
174 | } |
175 | ||
9f45fb3a | 176 | /** |
01c3e9db | 177 | * Remove all datafeed callbacks in the current session. |
9f45fb3a | 178 | * |
e0508e67 | 179 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 180 | */ |
01c3e9db | 181 | SR_API int sr_session_datafeed_callback_remove_all(void) |
a1bb33af | 182 | { |
9f45fb3a UH |
183 | if (!session) { |
184 | sr_err("session: %s: session was NULL", __func__); | |
e0508e67 | 185 | return SR_ERR_BUG; |
9f45fb3a UH |
186 | } |
187 | ||
a1bb33af UH |
188 | g_slist_free(session->datafeed_callbacks); |
189 | session->datafeed_callbacks = NULL; | |
e0508e67 UH |
190 | |
191 | return SR_OK; | |
a1bb33af UH |
192 | } |
193 | ||
9f45fb3a UH |
194 | /** |
195 | * Add a datafeed callback to the current session. | |
196 | * | |
d08490aa | 197 | * @param cb Function to call when a chunk of data is received. |
0abee507 | 198 | * Must not be NULL. |
a1645fcd | 199 | * |
e0508e67 | 200 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 201 | */ |
d08490aa | 202 | SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb) |
a1bb33af | 203 | { |
9f45fb3a UH |
204 | if (!session) { |
205 | sr_err("session: %s: session was NULL", __func__); | |
e0508e67 | 206 | return SR_ERR_BUG; |
9f45fb3a UH |
207 | } |
208 | ||
0abee507 UH |
209 | if (!cb) { |
210 | sr_err("session: %s: cb was NULL", __func__); | |
211 | return SR_ERR_ARG; | |
212 | } | |
9f45fb3a | 213 | |
62c82025 | 214 | session->datafeed_callbacks = |
d08490aa | 215 | g_slist_append(session->datafeed_callbacks, cb); |
e0508e67 UH |
216 | |
217 | return SR_OK; | |
a1bb33af UH |
218 | } |
219 | ||
e0508e67 | 220 | static int sr_session_run_poll(void) |
544a4582 | 221 | { |
b7e94111 LPC |
222 | unsigned int i; |
223 | int ret; | |
544a4582 | 224 | |
2cbeb2b7 BV |
225 | while (session->num_sources > 0) { |
226 | ret = g_poll(session->pollfds, session->num_sources, | |
227 | session->source_timeout); | |
b7e94111 LPC |
228 | for (i = 0; i < session->num_sources; i++) { |
229 | if (session->pollfds[i].revents > 0 || (ret == 0 | |
230 | && session->source_timeout == session->sources[i].timeout)) { | |
544a4582 BV |
231 | /* |
232 | * Invoke the source's callback on an event, | |
2cbeb2b7 | 233 | * or if the poll timed out and this source |
544a4582 BV |
234 | * asked for that timeout. |
235 | */ | |
2cbeb2b7 BV |
236 | if (!session->sources[i].cb(session->pollfds[i].fd, |
237 | session->pollfds[i].revents, | |
238 | session->sources[i].cb_data)) | |
b7e94111 | 239 | sr_session_source_remove(session->sources[i].poll_object); |
544a4582 BV |
240 | } |
241 | } | |
242 | } | |
e0508e67 UH |
243 | |
244 | return SR_OK; | |
544a4582 BV |
245 | } |
246 | ||
9f45fb3a UH |
247 | /** |
248 | * Start a session. | |
249 | * | |
a1645fcd | 250 | * There can only be one session at a time. |
9f45fb3a UH |
251 | * |
252 | * @return SR_OK upon success, SR_ERR upon errors. | |
253 | */ | |
1a081ca6 | 254 | SR_API int sr_session_start(void) |
7d658874 | 255 | { |
de4d3f99 | 256 | struct sr_dev_inst *sdi; |
7d658874 BV |
257 | GSList *l; |
258 | int ret; | |
259 | ||
9f45fb3a UH |
260 | if (!session) { |
261 | sr_err("session: %s: session was NULL; a session must be " | |
de4d3f99 | 262 | "created before starting it.", __func__); |
0abee507 | 263 | return SR_ERR_BUG; |
9f45fb3a UH |
264 | } |
265 | ||
bb7ef793 | 266 | if (!session->devs) { |
bb7ef793 | 267 | sr_err("session: %s: session->devs was NULL; a session " |
9f45fb3a | 268 | "cannot be started without devices.", __func__); |
0abee507 | 269 | return SR_ERR_BUG; |
9f45fb3a UH |
270 | } |
271 | ||
b08024a8 | 272 | sr_info("session: starting"); |
9f45fb3a | 273 | |
bb7ef793 | 274 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
275 | sdi = l->data; |
276 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
446a0372 | 277 | sr_err("session: %s: could not start an acquisition " |
9f45fb3a | 278 | "(%d)", __func__, ret); |
7d658874 | 279 | break; |
9f45fb3a | 280 | } |
7d658874 BV |
281 | } |
282 | ||
9f45fb3a UH |
283 | /* TODO: What if there are multiple devices? Which return code? */ |
284 | ||
7d658874 BV |
285 | return ret; |
286 | } | |
287 | ||
9f45fb3a UH |
288 | /** |
289 | * Run the session. | |
290 | * | |
e0508e67 | 291 | * @return SR_OK upon success, SR_ERR_BUG upon errors. |
9f45fb3a | 292 | */ |
1a081ca6 | 293 | SR_API int sr_session_run(void) |
7d658874 | 294 | { |
9f45fb3a UH |
295 | if (!session) { |
296 | sr_err("session: %s: session was NULL; a session must be " | |
297 | "created first, before running it.", __func__); | |
e0508e67 | 298 | return SR_ERR_BUG; |
9f45fb3a UH |
299 | } |
300 | ||
bb7ef793 | 301 | if (!session->devs) { |
9f45fb3a | 302 | /* TODO: Actually the case? */ |
bb7ef793 | 303 | sr_err("session: %s: session->devs was NULL; a session " |
9f45fb3a | 304 | "cannot be run without devices.", __func__); |
e0508e67 | 305 | return SR_ERR_BUG; |
9f45fb3a UH |
306 | } |
307 | ||
b08024a8 | 308 | sr_info("session: running"); |
7d658874 | 309 | |
9f45fb3a | 310 | /* Do we have real sources? */ |
b7e94111 | 311 | if (session->num_sources == 1 && session->pollfds[0].fd == -1) { |
9f45fb3a | 312 | /* Dummy source, freewheel over it. */ |
2cbeb2b7 | 313 | while (session->num_sources) |
b7e94111 | 314 | session->sources[0].cb(-1, 0, session->sources[0].cb_data); |
9f45fb3a UH |
315 | } else { |
316 | /* Real sources, use g_poll() main loop. */ | |
8a2efef2 | 317 | sr_session_run_poll(); |
9f45fb3a UH |
318 | } |
319 | ||
e0508e67 | 320 | return SR_OK; |
7d658874 BV |
321 | } |
322 | ||
9f45fb3a UH |
323 | /** |
324 | * Halt the current session. | |
325 | * | |
9ffbde0e LPC |
326 | * This function is deprecated and should not be used in new code, use |
327 | * sr_session_stop() instead. The behaviour of this function is identical to | |
328 | * sr_session_stop(). | |
e0508e67 UH |
329 | * |
330 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
9f45fb3a | 331 | */ |
1a081ca6 | 332 | SR_API int sr_session_halt(void) |
544a4582 | 333 | { |
9ffbde0e | 334 | return sr_session_stop(); |
544a4582 BV |
335 | } |
336 | ||
9f45fb3a UH |
337 | /** |
338 | * Stop the current session. | |
339 | * | |
a1645fcd | 340 | * The current session is stopped immediately, with all acquisition sessions |
c09f0b57 | 341 | * being stopped and hardware drivers cleaned up. |
9f45fb3a | 342 | * |
e0508e67 | 343 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 344 | */ |
1a081ca6 | 345 | SR_API int sr_session_stop(void) |
a1bb33af | 346 | { |
de4d3f99 | 347 | struct sr_dev_inst *sdi; |
a1bb33af UH |
348 | GSList *l; |
349 | ||
9f45fb3a UH |
350 | if (!session) { |
351 | sr_err("session: %s: session was NULL", __func__); | |
e0508e67 | 352 | return SR_ERR_BUG; |
9f45fb3a UH |
353 | } |
354 | ||
b08024a8 | 355 | sr_info("session: stopping"); |
e0508e67 | 356 | |
bb7ef793 | 357 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
358 | sdi = l->data; |
359 | if (sdi->driver) { | |
360 | if (sdi->driver->dev_acquisition_stop) | |
361 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
8c76be53 | 362 | } |
a1bb33af | 363 | } |
9f45fb3a | 364 | |
f1f7e62d AG |
365 | /* |
366 | * Some sources may not be necessarily associated with a device. | |
367 | * Those sources may still be present even after stopping all devices. | |
368 | * We need to make sure all sources are removed, or we risk running the | |
369 | * session in an infinite loop. | |
370 | */ | |
371 | while (session->num_sources) | |
372 | sr_session_source_remove(session->sources[0].poll_object); | |
373 | ||
e0508e67 | 374 | return SR_OK; |
a1bb33af UH |
375 | } |
376 | ||
9f45fb3a | 377 | /** |
a1645fcd | 378 | * Debug helper. |
9f45fb3a | 379 | * |
996b0c72 | 380 | * @param packet The packet to show debugging information for. |
9f45fb3a | 381 | */ |
bf53457d | 382 | static void datafeed_dump(const struct sr_datafeed_packet *packet) |
7d2afd6c | 383 | { |
bf53457d JH |
384 | const struct sr_datafeed_logic *logic; |
385 | const struct sr_datafeed_analog *analog; | |
7d2afd6c BV |
386 | |
387 | switch (packet->type) { | |
388 | case SR_DF_HEADER: | |
389 | sr_dbg("bus: received SR_DF_HEADER"); | |
390 | break; | |
391 | case SR_DF_TRIGGER: | |
01469707 | 392 | sr_dbg("bus: received SR_DF_TRIGGER"); |
7d2afd6c | 393 | break; |
ee7489d2 BV |
394 | case SR_DF_META_LOGIC: |
395 | sr_dbg("bus: received SR_DF_META_LOGIC"); | |
396 | break; | |
7d2afd6c BV |
397 | case SR_DF_LOGIC: |
398 | logic = packet->payload; | |
e0508e67 | 399 | /* TODO: Check for logic != NULL. */ |
01469707 | 400 | sr_dbg("bus: received SR_DF_LOGIC %" PRIu64 " bytes", logic->length); |
7d2afd6c | 401 | break; |
ee7489d2 | 402 | case SR_DF_META_ANALOG: |
dfd8f56e | 403 | sr_dbg("bus: received SR_DF_META_ANALOG"); |
ee7489d2 BV |
404 | break; |
405 | case SR_DF_ANALOG: | |
406 | analog = packet->payload; | |
407 | /* TODO: Check for analog != NULL. */ | |
408 | sr_dbg("bus: received SR_DF_ANALOG %d samples", analog->num_samples); | |
409 | break; | |
7d2afd6c BV |
410 | case SR_DF_END: |
411 | sr_dbg("bus: received SR_DF_END"); | |
412 | break; | |
6ea7669c BV |
413 | case SR_DF_FRAME_BEGIN: |
414 | sr_dbg("bus: received SR_DF_FRAME_BEGIN"); | |
415 | break; | |
416 | case SR_DF_FRAME_END: | |
417 | sr_dbg("bus: received SR_DF_FRAME_END"); | |
418 | break; | |
7d2afd6c | 419 | default: |
18beaeff | 420 | sr_dbg("bus: received unknown packet type %d", packet->type); |
9f45fb3a | 421 | break; |
7d2afd6c | 422 | } |
7d2afd6c BV |
423 | } |
424 | ||
9f45fb3a | 425 | /** |
a1645fcd BV |
426 | * Send a packet to whatever is listening on the datafeed bus. |
427 | * | |
428 | * Hardware drivers use this to send a data packet to the frontend. | |
9f45fb3a | 429 | * |
6b2d8d3e | 430 | * @param sdi TODO. |
31ccebc4 | 431 | * @param packet The datafeed packet to send to the session bus. |
44dae539 | 432 | * |
e0508e67 | 433 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. |
b4bd7088 UH |
434 | * |
435 | * @private | |
9f45fb3a | 436 | */ |
de4d3f99 | 437 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, |
bf53457d | 438 | const struct sr_datafeed_packet *packet) |
a1bb33af UH |
439 | { |
440 | GSList *l; | |
d08490aa | 441 | sr_datafeed_callback_t cb; |
a1bb33af | 442 | |
de4d3f99 BV |
443 | if (!sdi) { |
444 | sr_err("session: %s: sdi was NULL", __func__); | |
e0508e67 | 445 | return SR_ERR_ARG; |
9f45fb3a UH |
446 | } |
447 | ||
e0508e67 UH |
448 | if (!packet) { |
449 | sr_err("session: %s: packet was NULL", __func__); | |
450 | return SR_ERR_ARG; | |
9f45fb3a UH |
451 | } |
452 | ||
62c82025 | 453 | for (l = session->datafeed_callbacks; l; l = l->next) { |
18beaeff BV |
454 | if (sr_log_loglevel_get() >= SR_LOG_DBG) |
455 | datafeed_dump(packet); | |
a1bb33af | 456 | cb = l->data; |
de4d3f99 | 457 | cb(sdi, packet); |
a1bb33af | 458 | } |
9f45fb3a | 459 | |
e0508e67 | 460 | return SR_OK; |
a1bb33af UH |
461 | } |
462 | ||
6b2d8d3e UH |
463 | /** |
464 | * Add an event source for a file descriptor. | |
465 | * | |
466 | * @param pollfd The GPollFD. | |
467 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
468 | * @param cb Callback function to add. Must not be NULL. | |
469 | * @param cb_data Data for the callback function. Can be NULL. | |
470 | * @param poll_object TODO. | |
471 | * | |
472 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
473 | * SR_ERR_MALLOC upon memory allocation errors. | |
474 | */ | |
aac0ea25 | 475 | static int _sr_session_source_add(GPollFD *pollfd, int timeout, |
1a895c61 | 476 | sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object) |
544a4582 BV |
477 | { |
478 | struct source *new_sources, *s; | |
aac0ea25 | 479 | GPollFD *new_pollfds; |
544a4582 | 480 | |
d08490aa UH |
481 | if (!cb) { |
482 | sr_err("session: %s: cb was NULL", __func__); | |
e0508e67 | 483 | return SR_ERR_ARG; |
9f45fb3a UH |
484 | } |
485 | ||
1f9813eb | 486 | /* Note: cb_data can be NULL, that's not a bug. */ |
9f45fb3a | 487 | |
2ac2e629 BV |
488 | new_pollfds = g_try_realloc(session->pollfds, |
489 | sizeof(GPollFD) * (session->num_sources + 1)); | |
0687dfcd | 490 | if (!new_pollfds) { |
1a895c61 | 491 | sr_err("session: %s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
492 | return SR_ERR_MALLOC; |
493 | } | |
494 | ||
b7e94111 | 495 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * |
2ac2e629 | 496 | (session->num_sources + 1)); |
9f45fb3a UH |
497 | if (!new_sources) { |
498 | sr_err("session: %s: new_sources malloc failed", __func__); | |
e0508e67 | 499 | return SR_ERR_MALLOC; |
9f45fb3a | 500 | } |
544a4582 | 501 | |
b7e94111 LPC |
502 | new_pollfds[session->num_sources] = *pollfd; |
503 | s = &new_sources[session->num_sources++]; | |
544a4582 | 504 | s->timeout = timeout; |
d08490aa | 505 | s->cb = cb; |
1f9813eb | 506 | s->cb_data = cb_data; |
aac0ea25 | 507 | s->poll_object = poll_object; |
b7e94111 LPC |
508 | session->pollfds = new_pollfds; |
509 | session->sources = new_sources; | |
544a4582 | 510 | |
b7e94111 LPC |
511 | if (timeout != session->source_timeout && timeout > 0 |
512 | && (session->source_timeout == -1 || timeout < session->source_timeout)) | |
513 | session->source_timeout = timeout; | |
9f45fb3a | 514 | |
e0508e67 | 515 | return SR_OK; |
544a4582 BV |
516 | } |
517 | ||
9f45fb3a | 518 | /** |
6b2d8d3e | 519 | * Add an event source for a file descriptor. |
9f45fb3a | 520 | * |
aac0ea25 LPC |
521 | * @param fd The file descriptor. |
522 | * @param events Events to check for. | |
523 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
524 | * @param cb Callback function to add. Must not be NULL. | |
525 | * @param cb_data Data for the callback function. Can be NULL. | |
9f45fb3a | 526 | * |
aac0ea25 LPC |
527 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
528 | * SR_ERR_MALLOC upon memory allocation errors. | |
529 | */ | |
530 | SR_API int sr_session_source_add(int fd, int events, int timeout, | |
531 | sr_receive_data_callback_t cb, void *cb_data) | |
532 | { | |
533 | GPollFD p; | |
534 | ||
aac0ea25 LPC |
535 | p.fd = fd; |
536 | p.events = events; | |
aac0ea25 LPC |
537 | |
538 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd); | |
539 | } | |
540 | ||
541 | /** | |
1a895c61 | 542 | * Add an event source for a GPollFD. |
aac0ea25 | 543 | * |
aac0ea25 LPC |
544 | * @param pollfd The GPollFD. |
545 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
546 | * @param cb Callback function to add. Must not be NULL. | |
547 | * @param cb_data Data for the callback function. Can be NULL. | |
44dae539 | 548 | * |
e0508e67 | 549 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
aac0ea25 | 550 | * SR_ERR_MALLOC upon memory allocation errors. |
9f45fb3a | 551 | */ |
aac0ea25 LPC |
552 | SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout, |
553 | sr_receive_data_callback_t cb, void *cb_data) | |
554 | { | |
1a895c61 UH |
555 | return _sr_session_source_add(pollfd, timeout, cb, |
556 | cb_data, (gintptr)pollfd); | |
aac0ea25 LPC |
557 | } |
558 | ||
559 | /** | |
1a895c61 | 560 | * Add an event source for a GIOChannel. |
aac0ea25 | 561 | * |
aac0ea25 LPC |
562 | * @param channel The GIOChannel. |
563 | * @param events Events to poll on. | |
564 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
565 | * @param cb Callback function to add. Must not be NULL. | |
566 | * @param cb_data Data for the callback function. Can be NULL. | |
567 | * | |
568 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
569 | * SR_ERR_MALLOC upon memory allocation errors. | |
570 | */ | |
1a895c61 UH |
571 | SR_API int sr_session_source_add_channel(GIOChannel *channel, int events, |
572 | int timeout, sr_receive_data_callback_t cb, void *cb_data) | |
aac0ea25 LPC |
573 | { |
574 | GPollFD p; | |
575 | ||
576 | #ifdef _WIN32 | |
6b2d8d3e | 577 | g_io_channel_win32_make_pollfd(channel, events, &p); |
aac0ea25 LPC |
578 | #else |
579 | p.fd = g_io_channel_unix_get_fd(channel); | |
580 | p.events = events; | |
581 | #endif | |
582 | ||
583 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)channel); | |
584 | } | |
585 | ||
6b2d8d3e UH |
586 | /** |
587 | * Remove the source belonging to the specified channel. | |
588 | * | |
589 | * @todo Add more error checks and logging. | |
590 | * | |
591 | * @param channel The channel for which the source should be removed. | |
592 | * | |
593 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
594 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
595 | * internal errors. | |
596 | */ | |
aac0ea25 | 597 | static int _sr_session_source_remove(gintptr poll_object) |
544a4582 BV |
598 | { |
599 | struct source *new_sources; | |
0687dfcd | 600 | GPollFD *new_pollfds; |
b7e94111 | 601 | unsigned int old; |
544a4582 | 602 | |
b7e94111 | 603 | if (!session->sources || !session->num_sources) { |
e0508e67 | 604 | sr_err("session: %s: sources was NULL", __func__); |
0abee507 | 605 | return SR_ERR_BUG; |
e0508e67 UH |
606 | } |
607 | ||
b7e94111 LPC |
608 | for (old = 0; old < session->num_sources; old++) { |
609 | if (session->sources[old].poll_object == poll_object) | |
2bccd322 | 610 | break; |
9f45fb3a UH |
611 | } |
612 | ||
2bccd322 | 613 | /* fd not found, nothing to do */ |
b7e94111 | 614 | if (old == session->num_sources) |
2bccd322 LPC |
615 | return SR_OK; |
616 | ||
b7e94111 | 617 | session->num_sources -= 1; |
2bccd322 | 618 | |
b7e94111 LPC |
619 | if (old != session->num_sources) { |
620 | memmove(&session->pollfds[old], &session->pollfds[old+1], | |
621 | (session->num_sources - old) * sizeof(GPollFD)); | |
622 | memmove(&session->sources[old], &session->sources[old+1], | |
623 | (session->num_sources - old) * sizeof(struct source)); | |
9f45fb3a | 624 | } |
544a4582 | 625 | |
b7e94111 LPC |
626 | new_pollfds = g_try_realloc(session->pollfds, sizeof(GPollFD) * session->num_sources); |
627 | if (!new_pollfds && session->num_sources > 0) { | |
1a895c61 | 628 | sr_err("session: %s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
629 | return SR_ERR_MALLOC; |
630 | } | |
631 | ||
b7e94111 LPC |
632 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * session->num_sources); |
633 | if (!new_sources && session->num_sources > 0) { | |
2bccd322 LPC |
634 | sr_err("session: %s: new_sources malloc failed", __func__); |
635 | return SR_ERR_MALLOC; | |
544a4582 | 636 | } |
e0508e67 | 637 | |
b7e94111 LPC |
638 | session->pollfds = new_pollfds; |
639 | session->sources = new_sources; | |
2bccd322 | 640 | |
e0508e67 | 641 | return SR_OK; |
544a4582 | 642 | } |
aac0ea25 | 643 | |
6b2d8d3e | 644 | /** |
aac0ea25 LPC |
645 | * Remove the source belonging to the specified file descriptor. |
646 | * | |
1a895c61 | 647 | * @param fd The file descriptor for which the source should be removed. |
aac0ea25 LPC |
648 | * |
649 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
650 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
651 | * internal errors. | |
652 | */ | |
653 | SR_API int sr_session_source_remove(int fd) | |
654 | { | |
655 | return _sr_session_source_remove((gintptr)fd); | |
656 | } | |
657 | ||
658 | /** | |
659 | * Remove the source belonging to the specified poll descriptor. | |
660 | * | |
aac0ea25 LPC |
661 | * @param pollfd The poll descriptor for which the source should be removed. |
662 | * | |
663 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
664 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
665 | * internal errors. | |
666 | */ | |
667 | SR_API int sr_session_source_remove_pollfd(GPollFD *pollfd) | |
668 | { | |
669 | return _sr_session_source_remove((gintptr)pollfd); | |
670 | } | |
671 | ||
6b2d8d3e | 672 | /** |
aac0ea25 LPC |
673 | * Remove the source belonging to the specified channel. |
674 | * | |
1a895c61 | 675 | * @param channel The channel for which the source should be removed. |
aac0ea25 LPC |
676 | * |
677 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
678 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
679 | * internal errors. | |
680 | */ | |
681 | SR_API int sr_session_source_remove_channel(GIOChannel *channel) | |
682 | { | |
683 | return _sr_session_source_remove((gintptr)channel); | |
684 | } | |
7b870c38 UH |
685 | |
686 | /** @} */ |