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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 | |
b7c3e849 | 274 | ret = SR_OK; |
bb7ef793 | 275 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
276 | sdi = l->data; |
277 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
446a0372 | 278 | sr_err("session: %s: could not start an acquisition " |
9f45fb3a | 279 | "(%d)", __func__, ret); |
7d658874 | 280 | break; |
9f45fb3a | 281 | } |
7d658874 BV |
282 | } |
283 | ||
9f45fb3a UH |
284 | /* TODO: What if there are multiple devices? Which return code? */ |
285 | ||
7d658874 BV |
286 | return ret; |
287 | } | |
288 | ||
9f45fb3a UH |
289 | /** |
290 | * Run the session. | |
291 | * | |
e0508e67 | 292 | * @return SR_OK upon success, SR_ERR_BUG upon errors. |
9f45fb3a | 293 | */ |
1a081ca6 | 294 | SR_API int sr_session_run(void) |
7d658874 | 295 | { |
9f45fb3a UH |
296 | if (!session) { |
297 | sr_err("session: %s: session was NULL; a session must be " | |
298 | "created first, before running it.", __func__); | |
e0508e67 | 299 | return SR_ERR_BUG; |
9f45fb3a UH |
300 | } |
301 | ||
bb7ef793 | 302 | if (!session->devs) { |
9f45fb3a | 303 | /* TODO: Actually the case? */ |
bb7ef793 | 304 | sr_err("session: %s: session->devs was NULL; a session " |
9f45fb3a | 305 | "cannot be run without devices.", __func__); |
e0508e67 | 306 | return SR_ERR_BUG; |
9f45fb3a UH |
307 | } |
308 | ||
b08024a8 | 309 | sr_info("session: running"); |
7d658874 | 310 | |
9f45fb3a | 311 | /* Do we have real sources? */ |
b7e94111 | 312 | if (session->num_sources == 1 && session->pollfds[0].fd == -1) { |
9f45fb3a | 313 | /* Dummy source, freewheel over it. */ |
2cbeb2b7 | 314 | while (session->num_sources) |
b7e94111 | 315 | session->sources[0].cb(-1, 0, session->sources[0].cb_data); |
9f45fb3a UH |
316 | } else { |
317 | /* Real sources, use g_poll() main loop. */ | |
8a2efef2 | 318 | sr_session_run_poll(); |
9f45fb3a UH |
319 | } |
320 | ||
e0508e67 | 321 | return SR_OK; |
7d658874 BV |
322 | } |
323 | ||
9f45fb3a UH |
324 | /** |
325 | * Halt the current session. | |
326 | * | |
9ffbde0e LPC |
327 | * This function is deprecated and should not be used in new code, use |
328 | * sr_session_stop() instead. The behaviour of this function is identical to | |
329 | * sr_session_stop(). | |
e0508e67 UH |
330 | * |
331 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. | |
9f45fb3a | 332 | */ |
1a081ca6 | 333 | SR_API int sr_session_halt(void) |
544a4582 | 334 | { |
9ffbde0e | 335 | return sr_session_stop(); |
544a4582 BV |
336 | } |
337 | ||
9f45fb3a UH |
338 | /** |
339 | * Stop the current session. | |
340 | * | |
a1645fcd | 341 | * The current session is stopped immediately, with all acquisition sessions |
c09f0b57 | 342 | * being stopped and hardware drivers cleaned up. |
9f45fb3a | 343 | * |
e0508e67 | 344 | * @return SR_OK upon success, SR_ERR_BUG if no session exists. |
9f45fb3a | 345 | */ |
1a081ca6 | 346 | SR_API int sr_session_stop(void) |
a1bb33af | 347 | { |
de4d3f99 | 348 | struct sr_dev_inst *sdi; |
a1bb33af UH |
349 | GSList *l; |
350 | ||
9f45fb3a UH |
351 | if (!session) { |
352 | sr_err("session: %s: session was NULL", __func__); | |
e0508e67 | 353 | return SR_ERR_BUG; |
9f45fb3a UH |
354 | } |
355 | ||
b08024a8 | 356 | sr_info("session: stopping"); |
e0508e67 | 357 | |
bb7ef793 | 358 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
359 | sdi = l->data; |
360 | if (sdi->driver) { | |
361 | if (sdi->driver->dev_acquisition_stop) | |
362 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
8c76be53 | 363 | } |
a1bb33af | 364 | } |
9f45fb3a | 365 | |
f1f7e62d AG |
366 | /* |
367 | * Some sources may not be necessarily associated with a device. | |
368 | * Those sources may still be present even after stopping all devices. | |
369 | * We need to make sure all sources are removed, or we risk running the | |
370 | * session in an infinite loop. | |
371 | */ | |
372 | while (session->num_sources) | |
373 | sr_session_source_remove(session->sources[0].poll_object); | |
374 | ||
e0508e67 | 375 | return SR_OK; |
a1bb33af UH |
376 | } |
377 | ||
9f45fb3a | 378 | /** |
a1645fcd | 379 | * Debug helper. |
9f45fb3a | 380 | * |
996b0c72 | 381 | * @param packet The packet to show debugging information for. |
9f45fb3a | 382 | */ |
bf53457d | 383 | static void datafeed_dump(const struct sr_datafeed_packet *packet) |
7d2afd6c | 384 | { |
bf53457d JH |
385 | const struct sr_datafeed_logic *logic; |
386 | const struct sr_datafeed_analog *analog; | |
7d2afd6c BV |
387 | |
388 | switch (packet->type) { | |
389 | case SR_DF_HEADER: | |
390 | sr_dbg("bus: received SR_DF_HEADER"); | |
391 | break; | |
392 | case SR_DF_TRIGGER: | |
01469707 | 393 | sr_dbg("bus: received SR_DF_TRIGGER"); |
7d2afd6c | 394 | break; |
c71bac3b BV |
395 | case SR_DF_META: |
396 | sr_dbg("bus: received SR_DF_META"); | |
ee7489d2 | 397 | break; |
7d2afd6c BV |
398 | case SR_DF_LOGIC: |
399 | logic = packet->payload; | |
01469707 | 400 | sr_dbg("bus: received SR_DF_LOGIC %" PRIu64 " bytes", logic->length); |
7d2afd6c | 401 | break; |
ee7489d2 BV |
402 | case SR_DF_ANALOG: |
403 | analog = packet->payload; | |
ee7489d2 BV |
404 | sr_dbg("bus: received SR_DF_ANALOG %d samples", analog->num_samples); |
405 | break; | |
7d2afd6c BV |
406 | case SR_DF_END: |
407 | sr_dbg("bus: received SR_DF_END"); | |
408 | break; | |
6ea7669c BV |
409 | case SR_DF_FRAME_BEGIN: |
410 | sr_dbg("bus: received SR_DF_FRAME_BEGIN"); | |
411 | break; | |
412 | case SR_DF_FRAME_END: | |
413 | sr_dbg("bus: received SR_DF_FRAME_END"); | |
414 | break; | |
7d2afd6c | 415 | default: |
18beaeff | 416 | sr_dbg("bus: received unknown packet type %d", packet->type); |
9f45fb3a | 417 | break; |
7d2afd6c | 418 | } |
7d2afd6c BV |
419 | } |
420 | ||
9f45fb3a | 421 | /** |
a1645fcd BV |
422 | * Send a packet to whatever is listening on the datafeed bus. |
423 | * | |
424 | * Hardware drivers use this to send a data packet to the frontend. | |
9f45fb3a | 425 | * |
6b2d8d3e | 426 | * @param sdi TODO. |
31ccebc4 | 427 | * @param packet The datafeed packet to send to the session bus. |
44dae539 | 428 | * |
e0508e67 | 429 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. |
b4bd7088 UH |
430 | * |
431 | * @private | |
9f45fb3a | 432 | */ |
de4d3f99 | 433 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, |
bf53457d | 434 | const struct sr_datafeed_packet *packet) |
a1bb33af UH |
435 | { |
436 | GSList *l; | |
d08490aa | 437 | sr_datafeed_callback_t cb; |
a1bb33af | 438 | |
de4d3f99 BV |
439 | if (!sdi) { |
440 | sr_err("session: %s: sdi was NULL", __func__); | |
e0508e67 | 441 | return SR_ERR_ARG; |
9f45fb3a UH |
442 | } |
443 | ||
e0508e67 UH |
444 | if (!packet) { |
445 | sr_err("session: %s: packet was NULL", __func__); | |
446 | return SR_ERR_ARG; | |
9f45fb3a UH |
447 | } |
448 | ||
62c82025 | 449 | for (l = session->datafeed_callbacks; l; l = l->next) { |
18beaeff BV |
450 | if (sr_log_loglevel_get() >= SR_LOG_DBG) |
451 | datafeed_dump(packet); | |
a1bb33af | 452 | cb = l->data; |
de4d3f99 | 453 | cb(sdi, packet); |
a1bb33af | 454 | } |
9f45fb3a | 455 | |
e0508e67 | 456 | return SR_OK; |
a1bb33af UH |
457 | } |
458 | ||
6b2d8d3e UH |
459 | /** |
460 | * Add an event source for a file descriptor. | |
461 | * | |
462 | * @param pollfd The GPollFD. | |
463 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
464 | * @param cb Callback function to add. Must not be NULL. | |
465 | * @param cb_data Data for the callback function. Can be NULL. | |
466 | * @param poll_object TODO. | |
467 | * | |
468 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
469 | * SR_ERR_MALLOC upon memory allocation errors. | |
470 | */ | |
aac0ea25 | 471 | static int _sr_session_source_add(GPollFD *pollfd, int timeout, |
1a895c61 | 472 | sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object) |
544a4582 BV |
473 | { |
474 | struct source *new_sources, *s; | |
aac0ea25 | 475 | GPollFD *new_pollfds; |
544a4582 | 476 | |
d08490aa UH |
477 | if (!cb) { |
478 | sr_err("session: %s: cb was NULL", __func__); | |
e0508e67 | 479 | return SR_ERR_ARG; |
9f45fb3a UH |
480 | } |
481 | ||
1f9813eb | 482 | /* Note: cb_data can be NULL, that's not a bug. */ |
9f45fb3a | 483 | |
2ac2e629 BV |
484 | new_pollfds = g_try_realloc(session->pollfds, |
485 | sizeof(GPollFD) * (session->num_sources + 1)); | |
0687dfcd | 486 | if (!new_pollfds) { |
1a895c61 | 487 | sr_err("session: %s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
488 | return SR_ERR_MALLOC; |
489 | } | |
490 | ||
b7e94111 | 491 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * |
2ac2e629 | 492 | (session->num_sources + 1)); |
9f45fb3a UH |
493 | if (!new_sources) { |
494 | sr_err("session: %s: new_sources malloc failed", __func__); | |
e0508e67 | 495 | return SR_ERR_MALLOC; |
9f45fb3a | 496 | } |
544a4582 | 497 | |
b7e94111 LPC |
498 | new_pollfds[session->num_sources] = *pollfd; |
499 | s = &new_sources[session->num_sources++]; | |
544a4582 | 500 | s->timeout = timeout; |
d08490aa | 501 | s->cb = cb; |
1f9813eb | 502 | s->cb_data = cb_data; |
aac0ea25 | 503 | s->poll_object = poll_object; |
b7e94111 LPC |
504 | session->pollfds = new_pollfds; |
505 | session->sources = new_sources; | |
544a4582 | 506 | |
b7e94111 LPC |
507 | if (timeout != session->source_timeout && timeout > 0 |
508 | && (session->source_timeout == -1 || timeout < session->source_timeout)) | |
509 | session->source_timeout = timeout; | |
9f45fb3a | 510 | |
e0508e67 | 511 | return SR_OK; |
544a4582 BV |
512 | } |
513 | ||
9f45fb3a | 514 | /** |
6b2d8d3e | 515 | * Add an event source for a file descriptor. |
9f45fb3a | 516 | * |
aac0ea25 LPC |
517 | * @param fd The file descriptor. |
518 | * @param events Events to check for. | |
519 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
520 | * @param cb Callback function to add. Must not be NULL. | |
521 | * @param cb_data Data for the callback function. Can be NULL. | |
9f45fb3a | 522 | * |
aac0ea25 LPC |
523 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
524 | * SR_ERR_MALLOC upon memory allocation errors. | |
525 | */ | |
526 | SR_API int sr_session_source_add(int fd, int events, int timeout, | |
527 | sr_receive_data_callback_t cb, void *cb_data) | |
528 | { | |
529 | GPollFD p; | |
530 | ||
aac0ea25 LPC |
531 | p.fd = fd; |
532 | p.events = events; | |
aac0ea25 LPC |
533 | |
534 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd); | |
535 | } | |
536 | ||
537 | /** | |
1a895c61 | 538 | * Add an event source for a GPollFD. |
aac0ea25 | 539 | * |
aac0ea25 LPC |
540 | * @param pollfd The GPollFD. |
541 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
542 | * @param cb Callback function to add. Must not be NULL. | |
543 | * @param cb_data Data for the callback function. Can be NULL. | |
44dae539 | 544 | * |
e0508e67 | 545 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
aac0ea25 | 546 | * SR_ERR_MALLOC upon memory allocation errors. |
9f45fb3a | 547 | */ |
aac0ea25 LPC |
548 | SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout, |
549 | sr_receive_data_callback_t cb, void *cb_data) | |
550 | { | |
1a895c61 UH |
551 | return _sr_session_source_add(pollfd, timeout, cb, |
552 | cb_data, (gintptr)pollfd); | |
aac0ea25 LPC |
553 | } |
554 | ||
555 | /** | |
1a895c61 | 556 | * Add an event source for a GIOChannel. |
aac0ea25 | 557 | * |
aac0ea25 LPC |
558 | * @param channel The GIOChannel. |
559 | * @param events Events to poll on. | |
560 | * @param timeout Max time to wait before the callback is called, ignored if 0. | |
561 | * @param cb Callback function to add. Must not be NULL. | |
562 | * @param cb_data Data for the callback function. Can be NULL. | |
563 | * | |
564 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
565 | * SR_ERR_MALLOC upon memory allocation errors. | |
566 | */ | |
1a895c61 UH |
567 | SR_API int sr_session_source_add_channel(GIOChannel *channel, int events, |
568 | int timeout, sr_receive_data_callback_t cb, void *cb_data) | |
aac0ea25 LPC |
569 | { |
570 | GPollFD p; | |
571 | ||
572 | #ifdef _WIN32 | |
6b2d8d3e | 573 | g_io_channel_win32_make_pollfd(channel, events, &p); |
aac0ea25 LPC |
574 | #else |
575 | p.fd = g_io_channel_unix_get_fd(channel); | |
576 | p.events = events; | |
577 | #endif | |
578 | ||
579 | return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)channel); | |
580 | } | |
581 | ||
6b2d8d3e UH |
582 | /** |
583 | * Remove the source belonging to the specified channel. | |
584 | * | |
585 | * @todo Add more error checks and logging. | |
586 | * | |
587 | * @param channel The channel for which the source should be removed. | |
588 | * | |
589 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
590 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
591 | * internal errors. | |
592 | */ | |
aac0ea25 | 593 | static int _sr_session_source_remove(gintptr poll_object) |
544a4582 BV |
594 | { |
595 | struct source *new_sources; | |
0687dfcd | 596 | GPollFD *new_pollfds; |
b7e94111 | 597 | unsigned int old; |
544a4582 | 598 | |
b7e94111 | 599 | if (!session->sources || !session->num_sources) { |
e0508e67 | 600 | sr_err("session: %s: sources was NULL", __func__); |
0abee507 | 601 | return SR_ERR_BUG; |
e0508e67 UH |
602 | } |
603 | ||
b7e94111 LPC |
604 | for (old = 0; old < session->num_sources; old++) { |
605 | if (session->sources[old].poll_object == poll_object) | |
2bccd322 | 606 | break; |
9f45fb3a UH |
607 | } |
608 | ||
2bccd322 | 609 | /* fd not found, nothing to do */ |
b7e94111 | 610 | if (old == session->num_sources) |
2bccd322 LPC |
611 | return SR_OK; |
612 | ||
b7e94111 | 613 | session->num_sources -= 1; |
2bccd322 | 614 | |
b7e94111 LPC |
615 | if (old != session->num_sources) { |
616 | memmove(&session->pollfds[old], &session->pollfds[old+1], | |
617 | (session->num_sources - old) * sizeof(GPollFD)); | |
618 | memmove(&session->sources[old], &session->sources[old+1], | |
619 | (session->num_sources - old) * sizeof(struct source)); | |
9f45fb3a | 620 | } |
544a4582 | 621 | |
b7e94111 LPC |
622 | new_pollfds = g_try_realloc(session->pollfds, sizeof(GPollFD) * session->num_sources); |
623 | if (!new_pollfds && session->num_sources > 0) { | |
1a895c61 | 624 | sr_err("session: %s: new_pollfds malloc failed", __func__); |
0687dfcd LPC |
625 | return SR_ERR_MALLOC; |
626 | } | |
627 | ||
b7e94111 LPC |
628 | new_sources = g_try_realloc(session->sources, sizeof(struct source) * session->num_sources); |
629 | if (!new_sources && session->num_sources > 0) { | |
2bccd322 LPC |
630 | sr_err("session: %s: new_sources malloc failed", __func__); |
631 | return SR_ERR_MALLOC; | |
544a4582 | 632 | } |
e0508e67 | 633 | |
b7e94111 LPC |
634 | session->pollfds = new_pollfds; |
635 | session->sources = new_sources; | |
2bccd322 | 636 | |
e0508e67 | 637 | return SR_OK; |
544a4582 | 638 | } |
aac0ea25 | 639 | |
6b2d8d3e | 640 | /** |
aac0ea25 LPC |
641 | * Remove the source belonging to the specified file descriptor. |
642 | * | |
1a895c61 | 643 | * @param fd The file descriptor for which the source should be removed. |
aac0ea25 LPC |
644 | * |
645 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
646 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
647 | * internal errors. | |
648 | */ | |
649 | SR_API int sr_session_source_remove(int fd) | |
650 | { | |
651 | return _sr_session_source_remove((gintptr)fd); | |
652 | } | |
653 | ||
654 | /** | |
655 | * Remove the source belonging to the specified poll descriptor. | |
656 | * | |
aac0ea25 LPC |
657 | * @param pollfd The poll descriptor for which the source should be removed. |
658 | * | |
659 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
660 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
661 | * internal errors. | |
662 | */ | |
663 | SR_API int sr_session_source_remove_pollfd(GPollFD *pollfd) | |
664 | { | |
665 | return _sr_session_source_remove((gintptr)pollfd); | |
666 | } | |
667 | ||
6b2d8d3e | 668 | /** |
aac0ea25 LPC |
669 | * Remove the source belonging to the specified channel. |
670 | * | |
1a895c61 | 671 | * @param channel The channel for which the source should be removed. |
aac0ea25 LPC |
672 | * |
673 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
674 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
675 | * internal errors. | |
676 | */ | |
677 | SR_API int sr_session_source_remove_channel(GIOChannel *channel) | |
678 | { | |
679 | return _sr_session_source_remove((gintptr)channel); | |
680 | } | |
7b870c38 UH |
681 | |
682 | /** @} */ |