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a1bb33af UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Bert Vermeulen <bert@biot.com> | |
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 | ||
22b02383 | 20 | #include "config.h" |
a1bb33af UH |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <unistd.h> | |
24 | #include <string.h> | |
544a4582 | 25 | #include <glib.h> |
b7f09cf8 UH |
26 | #include "sigrok.h" |
27 | #include "sigrok-internal.h" | |
aa4b1107 | 28 | |
9f4bc44e UH |
29 | /* demo.c */ |
30 | extern GIOChannel channels[2]; | |
a1bb33af | 31 | |
544a4582 BV |
32 | struct source { |
33 | int fd; | |
34 | int events; | |
35 | int timeout; | |
a887e3da | 36 | sr_receive_data_callback cb; |
544a4582 BV |
37 | void *user_data; |
38 | }; | |
39 | ||
7d658874 | 40 | /* There can only be one session at a time. */ |
a0ecd83b | 41 | /* 'session' is not static, it's used elsewhere (via 'extern'). */ |
2872d21e | 42 | struct sr_session *session; |
a0ecd83b | 43 | static int num_sources = 0; |
544a4582 | 44 | |
a0ecd83b UH |
45 | static struct source *sources = NULL; |
46 | static int source_timeout = -1; | |
544a4582 | 47 | |
9f45fb3a UH |
48 | /** |
49 | * Create a new session. | |
50 | * | |
51 | * TODO. | |
52 | * | |
53 | * TODO: Should return int? | |
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 | */ | |
8a2efef2 | 59 | struct sr_session *sr_session_new(void) |
a1bb33af | 60 | { |
9f45fb3a UH |
61 | if (!(session = calloc(1, sizeof(struct sr_session)))) { |
62 | sr_err("session: %s: session malloc failed", __func__); | |
63 | return NULL; /* TODO: SR_ERR_MALLOC? */ | |
64 | } | |
a1bb33af UH |
65 | |
66 | return session; | |
67 | } | |
68 | ||
9f45fb3a UH |
69 | /** |
70 | * Destroy the current session. | |
71 | * | |
72 | * This frees up all memory used by the session. | |
73 | * | |
74 | * TODO: Should return int? | |
75 | */ | |
8a2efef2 | 76 | void sr_session_destroy(void) |
a1bb33af | 77 | { |
9f45fb3a UH |
78 | if (!session) { |
79 | sr_warn("session: %s: session was NULL", __func__); | |
80 | return; /* TODO: SR_ERR_BUG? */ | |
81 | } | |
82 | ||
a1bb33af UH |
83 | g_slist_free(session->devices); |
84 | ||
9f45fb3a UH |
85 | /* TODO: Error checks needed? */ |
86 | ||
aa4b1107 | 87 | /* TODO: Loop over protocol decoders and free them. */ |
a1bb33af UH |
88 | |
89 | g_free(session); | |
9f45fb3a UH |
90 | |
91 | session = NULL; | |
a1bb33af UH |
92 | } |
93 | ||
9f45fb3a UH |
94 | /** |
95 | * Remove all the devices from the current session. TODO? | |
96 | * | |
97 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
98 | * exists after this function returns. | |
99 | * | |
100 | * TODO: Return int? | |
101 | */ | |
8a2efef2 | 102 | void sr_session_device_clear(void) |
a1bb33af | 103 | { |
9f45fb3a UH |
104 | if (!session) { |
105 | sr_warn("session: %s: session was NULL", __func__); | |
106 | return; /* TODO: SR_ERR_BUG? */ | |
107 | } | |
108 | ||
a1bb33af UH |
109 | g_slist_free(session->devices); |
110 | session->devices = NULL; | |
a1bb33af UH |
111 | } |
112 | ||
9f45fb3a UH |
113 | /** |
114 | * Add a device to the current session. | |
115 | * | |
116 | * @param device The device to add to the current session. Must not be NULL. | |
117 | * Also, device->plugin and device->plugin->opendev must not | |
118 | * be NULL. | |
119 | * | |
120 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. | |
121 | */ | |
8a2efef2 | 122 | int sr_session_device_add(struct sr_device *device) |
a1bb33af UH |
123 | { |
124 | int ret; | |
125 | ||
9f45fb3a UH |
126 | if (!device) { |
127 | sr_err("session: %s: device was NULL", __func__); | |
128 | return SR_ERR_ARG; | |
129 | } | |
130 | ||
131 | if (!device->plugin) { | |
132 | sr_err("session: %s: device->plugin was NULL", __func__); | |
133 | return SR_ERR_ARG; | |
134 | } | |
135 | ||
136 | if (!device->plugin->opendev) { | |
137 | sr_err("session: %s: device->plugin->opendev was NULL", | |
138 | __func__); | |
139 | return SR_ERR_ARG; | |
140 | } | |
141 | ||
142 | if (!session) { | |
143 | sr_err("session: %s: session was NULL", __func__); | |
144 | return SR_ERR; /* TODO: SR_ERR_BUG? */ | |
145 | } | |
146 | ||
147 | if ((ret = device->plugin->opendev(device->plugin_index)) != SR_OK) { | |
148 | sr_err("session: %s: opendev failed (%d)", __func__, ret); | |
149 | return ret; | |
aa4b1107 | 150 | } |
a1bb33af | 151 | |
aa4b1107 BV |
152 | session->devices = g_slist_append(session->devices, device); |
153 | ||
e46b8fb1 | 154 | return SR_OK; |
a1bb33af UH |
155 | } |
156 | ||
8bb416be | 157 | #if 0 |
8a2efef2 | 158 | void sr_session_pa_clear(void) |
a1bb33af | 159 | { |
62c82025 UH |
160 | /* |
161 | * The protocols are pointers to the global set of PA plugins, | |
162 | * so don't free them. | |
163 | */ | |
a1bb33af UH |
164 | g_slist_free(session->analyzers); |
165 | session->analyzers = NULL; | |
a1bb33af UH |
166 | } |
167 | ||
809c5f20 | 168 | void sr_session_pa_add(struct sr_analyzer *an) |
a1bb33af | 169 | { |
a1bb33af | 170 | session->analyzers = g_slist_append(session->analyzers, an); |
a1bb33af | 171 | } |
8bb416be | 172 | #endif |
a1bb33af | 173 | |
9f45fb3a UH |
174 | /** |
175 | * Clear all datafeed callbacks in the current session. | |
176 | * | |
177 | * TODO: Should return int? | |
178 | * | |
179 | * TODO | |
180 | */ | |
8a2efef2 | 181 | void sr_session_datafeed_callback_clear(void) |
a1bb33af | 182 | { |
9f45fb3a UH |
183 | if (!session) { |
184 | sr_err("session: %s: session was NULL", __func__); | |
185 | return; /* TODO: SR_ERR_BUG? */ | |
186 | } | |
187 | ||
a1bb33af UH |
188 | g_slist_free(session->datafeed_callbacks); |
189 | session->datafeed_callbacks = NULL; | |
a1bb33af UH |
190 | } |
191 | ||
9f45fb3a UH |
192 | /** |
193 | * Add a datafeed callback to the current session. | |
194 | * | |
195 | * TODO: Should return int? | |
196 | * | |
197 | * @param callback TODO | |
198 | */ | |
13b05733 | 199 | void sr_session_datafeed_callback_add(sr_datafeed_callback callback) |
a1bb33af | 200 | { |
9f45fb3a UH |
201 | if (!session) { |
202 | sr_err("session: %s: session was NULL", __func__); | |
203 | return; /* TODO: SR_ERR_BUG? */ | |
204 | } | |
205 | ||
206 | /* TODO: Is 'callback' allowed to be NULL? */ | |
207 | ||
62c82025 UH |
208 | session->datafeed_callbacks = |
209 | g_slist_append(session->datafeed_callbacks, callback); | |
a1bb33af UH |
210 | } |
211 | ||
9f45fb3a UH |
212 | /** |
213 | * TODO. | |
214 | */ | |
215 | static void sr_session_run_poll(void) | |
544a4582 BV |
216 | { |
217 | GPollFD *fds, my_gpollfd; | |
218 | int ret, i; | |
219 | ||
544a4582 BV |
220 | fds = NULL; |
221 | while (session->running) { | |
222 | if (fds) | |
223 | free(fds); | |
224 | ||
225 | /* Construct g_poll()'s array. */ | |
9f45fb3a | 226 | /* TODO: Check malloc return value. */ |
544a4582 BV |
227 | fds = malloc(sizeof(GPollFD) * num_sources); |
228 | for (i = 0; i < num_sources; i++) { | |
229 | #ifdef _WIN32 | |
230 | g_io_channel_win32_make_pollfd(&channels[0], | |
231 | sources[i].events, &my_gpollfd); | |
232 | #else | |
233 | my_gpollfd.fd = sources[i].fd; | |
234 | my_gpollfd.events = sources[i].events; | |
235 | fds[i] = my_gpollfd; | |
236 | #endif | |
237 | } | |
238 | ||
239 | ret = g_poll(fds, num_sources, source_timeout); | |
240 | ||
241 | for (i = 0; i < num_sources; i++) { | |
242 | if (fds[i].revents > 0 || (ret == 0 | |
243 | && source_timeout == sources[i].timeout)) { | |
244 | /* | |
245 | * Invoke the source's callback on an event, | |
246 | * or if the poll timeout out and this source | |
247 | * asked for that timeout. | |
248 | */ | |
5c582d9f GM |
249 | if (!sources[i].cb(fds[i].fd, fds[i].revents, |
250 | sources[i].user_data)) | |
251 | sr_session_source_remove(sources[i].fd); | |
544a4582 BV |
252 | } |
253 | } | |
254 | } | |
255 | free(fds); | |
544a4582 BV |
256 | } |
257 | ||
9f45fb3a UH |
258 | /** |
259 | * Start a session. | |
260 | * | |
261 | * There can only be one session at a time. TODO | |
262 | * | |
263 | * @return SR_OK upon success, SR_ERR upon errors. | |
264 | */ | |
8a2efef2 | 265 | int sr_session_start(void) |
7d658874 BV |
266 | { |
267 | struct sr_device *device; | |
268 | GSList *l; | |
269 | int ret; | |
270 | ||
9f45fb3a UH |
271 | if (!session) { |
272 | sr_err("session: %s: session was NULL; a session must be " | |
273 | "created first, before starting it.", __func__); | |
274 | return SR_ERR; /* TODO: SR_ERR_BUG? */ | |
275 | } | |
276 | ||
277 | if (!session->devices) { | |
278 | /* TODO: Actually the case? */ | |
279 | sr_err("session: %s: session->devices was NULL; a session " | |
280 | "cannot be started without devices.", __func__); | |
281 | return SR_ERR; /* TODO: SR_ERR_BUG? */ | |
282 | } | |
283 | ||
284 | /* TODO: Check plugin_index validity? */ | |
285 | ||
b08024a8 | 286 | sr_info("session: starting"); |
9f45fb3a | 287 | |
7d658874 BV |
288 | for (l = session->devices; l; l = l->next) { |
289 | device = l->data; | |
9f45fb3a | 290 | /* TODO: Check for device != NULL. */ |
7d658874 | 291 | if ((ret = device->plugin->start_acquisition( |
9f45fb3a UH |
292 | device->plugin_index, device)) != SR_OK) { |
293 | sr_err("session: %s: could not start an acquisition ", | |
294 | "(%d)", __func__, ret); | |
7d658874 | 295 | break; |
9f45fb3a | 296 | } |
7d658874 BV |
297 | } |
298 | ||
9f45fb3a UH |
299 | /* TODO: What if there are multiple devices? Which return code? */ |
300 | ||
7d658874 BV |
301 | return ret; |
302 | } | |
303 | ||
9f45fb3a UH |
304 | /** |
305 | * Run the session. | |
306 | * | |
307 | * TODO: Should return int. | |
308 | * TODO: Various error checks etc. | |
309 | * | |
310 | * TODO. | |
311 | */ | |
8a2efef2 | 312 | void sr_session_run(void) |
7d658874 | 313 | { |
9f45fb3a UH |
314 | if (!session) { |
315 | sr_err("session: %s: session was NULL; a session must be " | |
316 | "created first, before running it.", __func__); | |
317 | return; /* TODO: SR_ERR or SR_ERR_BUG? */ | |
318 | } | |
319 | ||
320 | if (!session->devices) { | |
321 | /* TODO: Actually the case? */ | |
322 | sr_err("session: %s: session->devices was NULL; a session " | |
323 | "cannot be run without devices.", __func__); | |
324 | return; /* TODO: SR_ERR or SR_ERR_BUG? */ | |
325 | } | |
326 | ||
b08024a8 | 327 | sr_info("session: running"); |
7d658874 BV |
328 | session->running = TRUE; |
329 | ||
9f45fb3a UH |
330 | /* Do we have real sources? */ |
331 | if (num_sources == 1 && sources[0].fd == -1) { | |
332 | /* Dummy source, freewheel over it. */ | |
7d658874 BV |
333 | while (session->running) |
334 | sources[0].cb(-1, 0, sources[0].user_data); | |
9f45fb3a UH |
335 | } else { |
336 | /* Real sources, use g_poll() main loop. */ | |
8a2efef2 | 337 | sr_session_run_poll(); |
9f45fb3a UH |
338 | } |
339 | ||
340 | /* TODO: return SR_OK; */ | |
7d658874 BV |
341 | } |
342 | ||
9f45fb3a UH |
343 | /** |
344 | * Halt the current session. | |
345 | * | |
346 | * TODO: Return int. | |
347 | * | |
348 | * TODO. | |
349 | */ | |
8a2efef2 | 350 | void sr_session_halt(void) |
544a4582 | 351 | { |
9f45fb3a UH |
352 | if (!session) { |
353 | sr_err("session: %s: session was NULL", __func__); | |
354 | return; /* TODO: SR_ERR; or SR_ERR_BUG? */ | |
355 | } | |
356 | ||
b08024a8 | 357 | sr_info("session: halting"); |
544a4582 | 358 | session->running = FALSE; |
9f45fb3a UH |
359 | |
360 | /* TODO: return SR_OK; */ | |
544a4582 BV |
361 | } |
362 | ||
9f45fb3a UH |
363 | /** |
364 | * Stop the current session. | |
365 | * | |
366 | * TODO: Difference to halt? | |
367 | * | |
368 | * TODO. | |
369 | */ | |
8a2efef2 | 370 | void sr_session_stop(void) |
a1bb33af | 371 | { |
5c2d46d1 | 372 | struct sr_device *device; |
a1bb33af UH |
373 | GSList *l; |
374 | ||
9f45fb3a UH |
375 | if (!session) { |
376 | sr_err("session: %s: session was NULL", __func__); | |
377 | return; /* TODO: SR_ERR or SR_ERR_BUG? */ | |
378 | } | |
379 | ||
b08024a8 | 380 | sr_info("session: stopping"); |
544a4582 | 381 | session->running = FALSE; |
62c82025 | 382 | for (l = session->devices; l; l = l->next) { |
a1bb33af | 383 | device = l->data; |
b8c2f85f | 384 | if (device->plugin && device->plugin->stop_acquisition) |
aa4b1107 | 385 | device->plugin->stop_acquisition(device->plugin_index, device); |
a1bb33af | 386 | } |
9f45fb3a UH |
387 | |
388 | /* TODO: return SR_OK; */ | |
a1bb33af UH |
389 | } |
390 | ||
9f45fb3a UH |
391 | /** |
392 | * TODO. | |
393 | * | |
394 | * TODO: Should return int? | |
395 | * TODO: Various error checks. | |
396 | * | |
397 | * @param packet TODO. | |
398 | */ | |
7d2afd6c BV |
399 | static void datafeed_dump(struct sr_datafeed_packet *packet) |
400 | { | |
401 | struct sr_datafeed_logic *logic; | |
402 | ||
403 | switch (packet->type) { | |
404 | case SR_DF_HEADER: | |
405 | sr_dbg("bus: received SR_DF_HEADER"); | |
406 | break; | |
407 | case SR_DF_TRIGGER: | |
408 | sr_dbg("bus: received SR_DF_TRIGGER at %lu ms", | |
409 | packet->timeoffset / 1000000); | |
410 | break; | |
411 | case SR_DF_LOGIC: | |
412 | logic = packet->payload; | |
9f45fb3a UH |
413 | sr_dbg("bus: received SR_DF_LOGIC at %f ms duration %f ms, " |
414 | "%" PRIu64 " bytes", packet->timeoffset / 1000000.0, | |
415 | packet->duration / 1000000.0, logic->length); | |
7d2afd6c BV |
416 | break; |
417 | case SR_DF_END: | |
418 | sr_dbg("bus: received SR_DF_END"); | |
419 | break; | |
420 | default: | |
9f45fb3a | 421 | /* TODO: sr_err() and abort? */ |
7d2afd6c | 422 | sr_dbg("bus: received unknown packet type %d", packet->type); |
9f45fb3a | 423 | break; |
7d2afd6c | 424 | } |
7d2afd6c BV |
425 | } |
426 | ||
9f45fb3a UH |
427 | /** |
428 | * TODO. | |
429 | * | |
430 | * TODO: Should return int? | |
431 | * | |
432 | * @param device TODO. | |
433 | * @param packet TODO. | |
434 | */ | |
8a2efef2 | 435 | void sr_session_bus(struct sr_device *device, struct sr_datafeed_packet *packet) |
a1bb33af UH |
436 | { |
437 | GSList *l; | |
13b05733 | 438 | sr_datafeed_callback cb; |
a1bb33af | 439 | |
9f45fb3a UH |
440 | if (!device) { |
441 | sr_err("session: %s: device was NULL", __func__); | |
442 | return; /* TODO: SR_ERR_ARG */ | |
443 | } | |
444 | ||
445 | if (!device->plugin) { | |
446 | sr_err("session: %s: device->plugin was NULL", __func__); | |
447 | return; /* TODO: SR_ERR_ARG */ | |
448 | } | |
449 | ||
62c82025 | 450 | /* |
aa4b1107 | 451 | * TODO: Send packet through PD pipe, and send the output of that to |
62c82025 | 452 | * the callbacks as well. |
a1bb33af | 453 | */ |
62c82025 | 454 | for (l = session->datafeed_callbacks; l; l = l->next) { |
a1bb33af | 455 | cb = l->data; |
9f45fb3a | 456 | /* TODO: Check for cb != NULL. */ |
7d2afd6c | 457 | datafeed_dump(packet); |
a1bb33af UH |
458 | cb(device, packet); |
459 | } | |
9f45fb3a UH |
460 | |
461 | /* TODO: return SR_OK; */ | |
a1bb33af UH |
462 | } |
463 | ||
9f45fb3a UH |
464 | /** |
465 | * TODO. | |
466 | * | |
467 | * TODO: Should return int? | |
468 | * TODO: Switch to g_try_malloc0() / g_free(). | |
469 | * TODO: More error checks etc. | |
470 | * | |
471 | * @param fd TODO. | |
472 | * @param events TODO. | |
473 | * @param timeout TODO. | |
474 | * @param callback TODO. | |
475 | * @param user_data TODO. | |
476 | */ | |
8a2efef2 | 477 | void sr_session_source_add(int fd, int events, int timeout, |
a887e3da | 478 | sr_receive_data_callback callback, void *user_data) |
544a4582 BV |
479 | { |
480 | struct source *new_sources, *s; | |
481 | ||
9f45fb3a UH |
482 | if (!callback) { |
483 | sr_err("session: %s: callback was NULL", __func__); | |
484 | return; /* TODO: SR_ERR_ARG */ | |
485 | } | |
486 | ||
487 | /* Note: user_data can be NULL, that's not a bug. */ | |
488 | ||
544a4582 | 489 | new_sources = calloc(1, sizeof(struct source) * (num_sources + 1)); |
9f45fb3a UH |
490 | if (!new_sources) { |
491 | sr_err("session: %s: new_sources malloc failed", __func__); | |
492 | return; /* TODO: SR_ERR_MALLOC */ | |
493 | } | |
544a4582 BV |
494 | |
495 | if (sources) { | |
496 | memcpy(new_sources, sources, | |
497 | sizeof(struct source) * num_sources); | |
498 | free(sources); | |
499 | } | |
500 | ||
501 | s = &new_sources[num_sources++]; | |
502 | s->fd = fd; | |
503 | s->events = events; | |
504 | s->timeout = timeout; | |
505 | s->cb = callback; | |
506 | s->user_data = user_data; | |
507 | sources = new_sources; | |
508 | ||
509 | if (timeout != source_timeout && timeout > 0 | |
510 | && (source_timeout == -1 || timeout < source_timeout)) | |
511 | source_timeout = timeout; | |
9f45fb3a UH |
512 | |
513 | /* TODO: return SR_OK; */ | |
544a4582 BV |
514 | } |
515 | ||
9f45fb3a UH |
516 | /** |
517 | * Remove the source belonging to the specified file descriptor. | |
518 | * | |
519 | * TODO: Should return int. | |
520 | * TODO: More error checks. | |
521 | * TODO: Switch to g_try_malloc0() / g_free(). | |
522 | * | |
523 | * @param fd TODO. | |
524 | */ | |
8a2efef2 | 525 | void sr_session_source_remove(int fd) |
544a4582 BV |
526 | { |
527 | struct source *new_sources; | |
528 | int old, new; | |
529 | ||
9f45fb3a | 530 | /* TODO */ |
544a4582 BV |
531 | if (!sources) |
532 | return; | |
533 | ||
534 | new_sources = calloc(1, sizeof(struct source) * num_sources); | |
9f45fb3a UH |
535 | if (!new_sources) { |
536 | sr_err("session: %s: new_sources malloc failed", __func__); | |
537 | return; /* TODO: SR_ERR_MALLOC */ | |
538 | } | |
539 | ||
540 | for (old = 0, new = 0; old < num_sources; old++) { | |
544a4582 BV |
541 | if (sources[old].fd != fd) |
542 | memcpy(&new_sources[new++], &sources[old], | |
543 | sizeof(struct source)); | |
9f45fb3a | 544 | } |
544a4582 BV |
545 | |
546 | if (old != new) { | |
547 | free(sources); | |
548 | sources = new_sources; | |
549 | num_sources--; | |
550 | } else { | |
551 | /* Target fd was not found. */ | |
552 | free(new_sources); | |
553 | } | |
554 | } |