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