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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2015 Daniel Elstner <daniel.kitta@gmail.com> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <unistd.h> | |
25 | #include <string.h> | |
26 | #include <glib.h> | |
27 | #include <libsigrok/libsigrok.h> | |
28 | #include "libsigrok-internal.h" | |
29 | ||
30 | /** @cond PRIVATE */ | |
31 | #define LOG_PREFIX "session" | |
32 | /** @endcond */ | |
33 | ||
34 | /** | |
35 | * @file | |
36 | * | |
37 | * Creating, using, or destroying libsigrok sessions. | |
38 | */ | |
39 | ||
40 | /** | |
41 | * @defgroup grp_session Session handling | |
42 | * | |
43 | * Creating, using, or destroying libsigrok sessions. | |
44 | * | |
45 | * @{ | |
46 | */ | |
47 | ||
48 | struct datafeed_callback { | |
49 | sr_datafeed_callback cb; | |
50 | void *cb_data; | |
51 | }; | |
52 | ||
53 | /** Custom GLib event source for generic descriptor I/O. | |
54 | * @internal | |
55 | */ | |
56 | struct fd_source { | |
57 | GSource base; | |
58 | ||
59 | int64_t timeout_us; | |
60 | int64_t due_us; | |
61 | ||
62 | /* Meta-data needed to keep track of installed sources */ | |
63 | struct sr_session *session; | |
64 | void *key; | |
65 | ||
66 | GPollFD pollfd; | |
67 | }; | |
68 | ||
69 | /** FD event source prepare() method. | |
70 | */ | |
71 | static gboolean fd_source_prepare(GSource *source, int *timeout) | |
72 | { | |
73 | int64_t now_us; | |
74 | struct fd_source *fsource; | |
75 | int remaining_ms; | |
76 | ||
77 | fsource = (struct fd_source *)source; | |
78 | ||
79 | if (fsource->timeout_us >= 0) { | |
80 | now_us = g_source_get_time(source); | |
81 | ||
82 | if (fsource->due_us == 0) { | |
83 | /* First-time initialization of the expiration time */ | |
84 | fsource->due_us = now_us + fsource->timeout_us; | |
85 | } | |
86 | remaining_ms = (MAX(0, fsource->due_us - now_us) + 999) / 1000; | |
87 | } else { | |
88 | remaining_ms = -1; | |
89 | } | |
90 | *timeout = remaining_ms; | |
91 | ||
92 | return (remaining_ms == 0); | |
93 | } | |
94 | ||
95 | /** FD event source check() method. | |
96 | */ | |
97 | static gboolean fd_source_check(GSource *source) | |
98 | { | |
99 | struct fd_source *fsource; | |
100 | unsigned int revents; | |
101 | ||
102 | fsource = (struct fd_source *)source; | |
103 | revents = fsource->pollfd.revents; | |
104 | ||
105 | return (revents != 0 || (fsource->timeout_us >= 0 | |
106 | && fsource->due_us <= g_source_get_time(source))); | |
107 | } | |
108 | ||
109 | /** FD event source dispatch() method. | |
110 | */ | |
111 | static gboolean fd_source_dispatch(GSource *source, | |
112 | GSourceFunc callback, void *user_data) | |
113 | { | |
114 | struct fd_source *fsource; | |
115 | const char *name; | |
116 | unsigned int revents; | |
117 | gboolean keep; | |
118 | ||
119 | fsource = (struct fd_source *)source; | |
120 | name = g_source_get_name(source); | |
121 | revents = fsource->pollfd.revents; | |
122 | ||
123 | if (revents != 0) { | |
124 | sr_spew("%s: %s " G_POLLFD_FORMAT ", revents 0x%.2X", | |
125 | __func__, name, fsource->pollfd.fd, revents); | |
126 | } else { | |
127 | sr_spew("%s: %s " G_POLLFD_FORMAT ", timed out", | |
128 | __func__, name, fsource->pollfd.fd); | |
129 | } | |
130 | if (!callback) { | |
131 | sr_err("Callback not set, cannot dispatch event."); | |
132 | return G_SOURCE_REMOVE; | |
133 | } | |
134 | keep = (*(sr_receive_data_callback)callback) | |
135 | (fsource->pollfd.fd, revents, user_data); | |
136 | ||
137 | if (fsource->timeout_us >= 0 && G_LIKELY(keep) | |
138 | && G_LIKELY(!g_source_is_destroyed(source))) | |
139 | fsource->due_us = g_source_get_time(source) | |
140 | + fsource->timeout_us; | |
141 | return keep; | |
142 | } | |
143 | ||
144 | /** FD event source finalize() method. | |
145 | */ | |
146 | static void fd_source_finalize(GSource *source) | |
147 | { | |
148 | struct fd_source *fsource; | |
149 | ||
150 | fsource = (struct fd_source *)source; | |
151 | ||
152 | sr_dbg("%s: key %p", __func__, fsource->key); | |
153 | ||
154 | sr_session_source_destroyed(fsource->session, fsource->key, source); | |
155 | } | |
156 | ||
157 | /** Create an event source for I/O on a file descriptor. | |
158 | * | |
159 | * In order to maintain API compatibility, this event source also doubles | |
160 | * as a timer event source. | |
161 | * | |
162 | * @param session The session the event source belongs to. | |
163 | * @param key The key used to identify this source. | |
164 | * @param fd The file descriptor or HANDLE. | |
165 | * @param timeout_ms The timeout interval in ms, or -1 to wait indefinitely. | |
166 | * @return A new event source object, or NULL on failure. | |
167 | */ | |
168 | static GSource *fd_source_new(struct sr_session *session, void *key, | |
169 | gintptr fd, int events, int timeout_ms) | |
170 | { | |
171 | static GSourceFuncs fd_source_funcs = { | |
172 | .prepare = &fd_source_prepare, | |
173 | .check = &fd_source_check, | |
174 | .dispatch = &fd_source_dispatch, | |
175 | .finalize = &fd_source_finalize | |
176 | }; | |
177 | GSource *source; | |
178 | struct fd_source *fsource; | |
179 | ||
180 | source = g_source_new(&fd_source_funcs, sizeof(struct fd_source)); | |
181 | fsource = (struct fd_source *)source; | |
182 | ||
183 | g_source_set_name(source, (fd < 0) ? "timer" : "fd"); | |
184 | ||
185 | if (timeout_ms >= 0) { | |
186 | fsource->timeout_us = 1000 * (int64_t)timeout_ms; | |
187 | fsource->due_us = 0; | |
188 | } else { | |
189 | fsource->timeout_us = -1; | |
190 | fsource->due_us = INT64_MAX; | |
191 | } | |
192 | fsource->session = session; | |
193 | fsource->key = key; | |
194 | ||
195 | fsource->pollfd.fd = fd; | |
196 | fsource->pollfd.events = events; | |
197 | fsource->pollfd.revents = 0; | |
198 | ||
199 | if (fd >= 0) | |
200 | g_source_add_poll(source, &fsource->pollfd); | |
201 | ||
202 | return source; | |
203 | } | |
204 | ||
205 | /** | |
206 | * Create a new session. | |
207 | * | |
208 | * @param ctx The context in which to create the new session. | |
209 | * @param new_session This will contain a pointer to the newly created | |
210 | * session if the return value is SR_OK, otherwise the value | |
211 | * is undefined and should not be used. Must not be NULL. | |
212 | * | |
213 | * @retval SR_OK Success. | |
214 | * @retval SR_ERR_ARG Invalid argument. | |
215 | * | |
216 | * @since 0.4.0 | |
217 | */ | |
218 | SR_API int sr_session_new(struct sr_context *ctx, | |
219 | struct sr_session **new_session) | |
220 | { | |
221 | struct sr_session *session; | |
222 | ||
223 | if (!new_session) | |
224 | return SR_ERR_ARG; | |
225 | ||
226 | session = g_malloc0(sizeof(struct sr_session)); | |
227 | ||
228 | session->ctx = ctx; | |
229 | ||
230 | g_mutex_init(&session->main_mutex); | |
231 | ||
232 | /* To maintain API compatibility, we need a lookup table | |
233 | * which maps poll_object IDs to GSource* pointers. | |
234 | */ | |
235 | session->event_sources = g_hash_table_new(NULL, NULL); | |
236 | ||
237 | *new_session = session; | |
238 | ||
239 | return SR_OK; | |
240 | } | |
241 | ||
242 | /** | |
243 | * Destroy a session. | |
244 | * This frees up all memory used by the session. | |
245 | * | |
246 | * @param session The session to destroy. Must not be NULL. | |
247 | * | |
248 | * @retval SR_OK Success. | |
249 | * @retval SR_ERR_ARG Invalid session passed. | |
250 | * | |
251 | * @since 0.4.0 | |
252 | */ | |
253 | SR_API int sr_session_destroy(struct sr_session *session) | |
254 | { | |
255 | if (!session) { | |
256 | sr_err("%s: session was NULL", __func__); | |
257 | return SR_ERR_ARG; | |
258 | } | |
259 | ||
260 | sr_session_dev_remove_all(session); | |
261 | g_slist_free_full(session->owned_devs, (GDestroyNotify)sr_dev_inst_free); | |
262 | ||
263 | g_hash_table_unref(session->event_sources); | |
264 | ||
265 | g_mutex_clear(&session->main_mutex); | |
266 | ||
267 | g_free(session); | |
268 | ||
269 | return SR_OK; | |
270 | } | |
271 | ||
272 | /** | |
273 | * Remove all the devices from a session. | |
274 | * | |
275 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
276 | * exists after this function returns. | |
277 | * | |
278 | * @param session The session to use. Must not be NULL. | |
279 | * | |
280 | * @retval SR_OK Success. | |
281 | * @retval SR_ERR_BUG Invalid session passed. | |
282 | * | |
283 | * @since 0.4.0 | |
284 | */ | |
285 | SR_API int sr_session_dev_remove_all(struct sr_session *session) | |
286 | { | |
287 | struct sr_dev_inst *sdi; | |
288 | GSList *l; | |
289 | ||
290 | if (!session) { | |
291 | sr_err("%s: session was NULL", __func__); | |
292 | return SR_ERR_ARG; | |
293 | } | |
294 | ||
295 | for (l = session->devs; l; l = l->next) { | |
296 | sdi = (struct sr_dev_inst *) l->data; | |
297 | sdi->session = NULL; | |
298 | } | |
299 | ||
300 | g_slist_free(session->devs); | |
301 | session->devs = NULL; | |
302 | ||
303 | return SR_OK; | |
304 | } | |
305 | ||
306 | /** | |
307 | * Add a device instance to a session. | |
308 | * | |
309 | * @param session The session to add to. Must not be NULL. | |
310 | * @param sdi The device instance to add to a session. Must not | |
311 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must | |
312 | * not be NULL. | |
313 | * | |
314 | * @retval SR_OK Success. | |
315 | * @retval SR_ERR_ARG Invalid argument. | |
316 | * | |
317 | * @since 0.4.0 | |
318 | */ | |
319 | SR_API int sr_session_dev_add(struct sr_session *session, | |
320 | struct sr_dev_inst *sdi) | |
321 | { | |
322 | int ret; | |
323 | ||
324 | if (!sdi) { | |
325 | sr_err("%s: sdi was NULL", __func__); | |
326 | return SR_ERR_ARG; | |
327 | } | |
328 | ||
329 | if (!session) { | |
330 | sr_err("%s: session was NULL", __func__); | |
331 | return SR_ERR_ARG; | |
332 | } | |
333 | ||
334 | /* If sdi->session is not NULL, the device is already in this or | |
335 | * another session. */ | |
336 | if (sdi->session) { | |
337 | sr_err("%s: already assigned to session", __func__); | |
338 | return SR_ERR_ARG; | |
339 | } | |
340 | ||
341 | /* If sdi->driver is NULL, this is a virtual device. */ | |
342 | if (!sdi->driver) { | |
343 | /* Just add the device, don't run dev_open(). */ | |
344 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
345 | sdi->session = session; | |
346 | return SR_OK; | |
347 | } | |
348 | ||
349 | /* sdi->driver is non-NULL (i.e. we have a real device). */ | |
350 | if (!sdi->driver->dev_open) { | |
351 | sr_err("%s: sdi->driver->dev_open was NULL", __func__); | |
352 | return SR_ERR_BUG; | |
353 | } | |
354 | ||
355 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
356 | sdi->session = session; | |
357 | ||
358 | if (session->running) { | |
359 | /* Adding a device to a running session. Commit settings | |
360 | * and start acquisition on that device now. */ | |
361 | if ((ret = sr_config_commit(sdi)) != SR_OK) { | |
362 | sr_err("Failed to commit device settings before " | |
363 | "starting acquisition in running session (%s)", | |
364 | sr_strerror(ret)); | |
365 | return ret; | |
366 | } | |
367 | if ((ret = sdi->driver->dev_acquisition_start(sdi, | |
368 | (void *)sdi)) != SR_OK) { | |
369 | sr_err("Failed to start acquisition of device in " | |
370 | "running session (%s)", sr_strerror(ret)); | |
371 | return ret; | |
372 | } | |
373 | } | |
374 | ||
375 | return SR_OK; | |
376 | } | |
377 | ||
378 | /** | |
379 | * List all device instances attached to a session. | |
380 | * | |
381 | * @param session The session to use. Must not be NULL. | |
382 | * @param devlist A pointer where the device instance list will be | |
383 | * stored on return. If no devices are in the session, | |
384 | * this will be NULL. Each element in the list points | |
385 | * to a struct sr_dev_inst *. | |
386 | * The list must be freed by the caller, but not the | |
387 | * elements pointed to. | |
388 | * | |
389 | * @retval SR_OK Success. | |
390 | * @retval SR_ERR_ARG Invalid argument. | |
391 | * | |
392 | * @since 0.4.0 | |
393 | */ | |
394 | SR_API int sr_session_dev_list(struct sr_session *session, GSList **devlist) | |
395 | { | |
396 | if (!session) | |
397 | return SR_ERR_ARG; | |
398 | ||
399 | if (!devlist) | |
400 | return SR_ERR_ARG; | |
401 | ||
402 | *devlist = g_slist_copy(session->devs); | |
403 | ||
404 | return SR_OK; | |
405 | } | |
406 | ||
407 | /** | |
408 | * Remove all datafeed callbacks in a session. | |
409 | * | |
410 | * @param session The session to use. Must not be NULL. | |
411 | * | |
412 | * @retval SR_OK Success. | |
413 | * @retval SR_ERR_ARG Invalid session passed. | |
414 | * | |
415 | * @since 0.4.0 | |
416 | */ | |
417 | SR_API int sr_session_datafeed_callback_remove_all(struct sr_session *session) | |
418 | { | |
419 | if (!session) { | |
420 | sr_err("%s: session was NULL", __func__); | |
421 | return SR_ERR_ARG; | |
422 | } | |
423 | ||
424 | g_slist_free_full(session->datafeed_callbacks, g_free); | |
425 | session->datafeed_callbacks = NULL; | |
426 | ||
427 | return SR_OK; | |
428 | } | |
429 | ||
430 | /** | |
431 | * Add a datafeed callback to a session. | |
432 | * | |
433 | * @param session The session to use. Must not be NULL. | |
434 | * @param cb Function to call when a chunk of data is received. | |
435 | * Must not be NULL. | |
436 | * @param cb_data Opaque pointer passed in by the caller. | |
437 | * | |
438 | * @retval SR_OK Success. | |
439 | * @retval SR_ERR_BUG No session exists. | |
440 | * | |
441 | * @since 0.3.0 | |
442 | */ | |
443 | SR_API int sr_session_datafeed_callback_add(struct sr_session *session, | |
444 | sr_datafeed_callback cb, void *cb_data) | |
445 | { | |
446 | struct datafeed_callback *cb_struct; | |
447 | ||
448 | if (!session) { | |
449 | sr_err("%s: session was NULL", __func__); | |
450 | return SR_ERR_BUG; | |
451 | } | |
452 | ||
453 | if (!cb) { | |
454 | sr_err("%s: cb was NULL", __func__); | |
455 | return SR_ERR_ARG; | |
456 | } | |
457 | ||
458 | cb_struct = g_malloc0(sizeof(struct datafeed_callback)); | |
459 | cb_struct->cb = cb; | |
460 | cb_struct->cb_data = cb_data; | |
461 | ||
462 | session->datafeed_callbacks = | |
463 | g_slist_append(session->datafeed_callbacks, cb_struct); | |
464 | ||
465 | return SR_OK; | |
466 | } | |
467 | ||
468 | /** | |
469 | * Get the trigger assigned to this session. | |
470 | * | |
471 | * @param session The session to use. | |
472 | * | |
473 | * @retval NULL Invalid (NULL) session was passed to the function. | |
474 | * @retval other The trigger assigned to this session (can be NULL). | |
475 | * | |
476 | * @since 0.4.0 | |
477 | */ | |
478 | SR_API struct sr_trigger *sr_session_trigger_get(struct sr_session *session) | |
479 | { | |
480 | if (!session) | |
481 | return NULL; | |
482 | ||
483 | return session->trigger; | |
484 | } | |
485 | ||
486 | /** | |
487 | * Set the trigger of this session. | |
488 | * | |
489 | * @param session The session to use. Must not be NULL. | |
490 | * @param trig The trigger to assign to this session. Can be NULL. | |
491 | * | |
492 | * @retval SR_OK Success. | |
493 | * @retval SR_ERR_ARG Invalid argument. | |
494 | * | |
495 | * @since 0.4.0 | |
496 | */ | |
497 | SR_API int sr_session_trigger_set(struct sr_session *session, struct sr_trigger *trig) | |
498 | { | |
499 | if (!session) | |
500 | return SR_ERR_ARG; | |
501 | ||
502 | session->trigger = trig; | |
503 | ||
504 | return SR_OK; | |
505 | } | |
506 | ||
507 | static int verify_trigger(struct sr_trigger *trigger) | |
508 | { | |
509 | struct sr_trigger_stage *stage; | |
510 | struct sr_trigger_match *match; | |
511 | GSList *l, *m; | |
512 | ||
513 | if (!trigger->stages) { | |
514 | sr_err("No trigger stages defined."); | |
515 | return SR_ERR; | |
516 | } | |
517 | ||
518 | sr_spew("Checking trigger:"); | |
519 | for (l = trigger->stages; l; l = l->next) { | |
520 | stage = l->data; | |
521 | if (!stage->matches) { | |
522 | sr_err("Stage %d has no matches defined.", stage->stage); | |
523 | return SR_ERR; | |
524 | } | |
525 | for (m = stage->matches; m; m = m->next) { | |
526 | match = m->data; | |
527 | if (!match->channel) { | |
528 | sr_err("Stage %d match has no channel.", stage->stage); | |
529 | return SR_ERR; | |
530 | } | |
531 | if (!match->match) { | |
532 | sr_err("Stage %d match is not defined.", stage->stage); | |
533 | return SR_ERR; | |
534 | } | |
535 | sr_spew("Stage %d match on channel %s, match %d", stage->stage, | |
536 | match->channel->name, match->match); | |
537 | } | |
538 | } | |
539 | ||
540 | return SR_OK; | |
541 | } | |
542 | ||
543 | /** Set up the main context the session will be executing in. | |
544 | * | |
545 | * Must be called just before the session starts, by the thread which | |
546 | * will execute the session main loop. Once acquired, the main context | |
547 | * pointer is immutable for the duration of the session run. | |
548 | */ | |
549 | static int set_main_context(struct sr_session *session) | |
550 | { | |
551 | GMainContext *def_context; | |
552 | ||
553 | /* May happen if sr_session_start() is called again after | |
554 | * sr_session_run(), but the session hasn't been stopped yet. | |
555 | */ | |
556 | if (session->main_loop) { | |
557 | sr_err("Cannot set main context; main loop already created."); | |
558 | return SR_ERR; | |
559 | } | |
560 | ||
561 | g_mutex_lock(&session->main_mutex); | |
562 | ||
563 | def_context = g_main_context_get_thread_default(); | |
564 | ||
565 | if (!def_context) | |
566 | def_context = g_main_context_default(); | |
567 | /* | |
568 | * Try to use an existing main context if possible, but only if we | |
569 | * can make it owned by the current thread. Otherwise, create our | |
570 | * own main context so that event source callbacks can execute in | |
571 | * the session thread. | |
572 | */ | |
573 | if (g_main_context_acquire(def_context)) { | |
574 | g_main_context_release(def_context); | |
575 | ||
576 | sr_dbg("Using thread-default main context."); | |
577 | ||
578 | session->main_context = def_context; | |
579 | session->main_context_is_default = TRUE; | |
580 | } else { | |
581 | sr_dbg("Creating our own main context."); | |
582 | ||
583 | session->main_context = g_main_context_new(); | |
584 | session->main_context_is_default = FALSE; | |
585 | } | |
586 | g_mutex_unlock(&session->main_mutex); | |
587 | ||
588 | return SR_OK; | |
589 | } | |
590 | ||
591 | /** Unset the main context used for the current session run. | |
592 | * | |
593 | * Must be called right after stopping the session. Note that if the | |
594 | * session is stopped asynchronously, the main loop may still be running | |
595 | * after the main context has been unset. This is OK as long as no new | |
596 | * event sources are created -- the main loop holds its own reference | |
597 | * to the main context. | |
598 | */ | |
599 | static int unset_main_context(struct sr_session *session) | |
600 | { | |
601 | int ret; | |
602 | ||
603 | g_mutex_lock(&session->main_mutex); | |
604 | ||
605 | if (session->main_context) { | |
606 | if (!session->main_context_is_default) | |
607 | g_main_context_unref(session->main_context); | |
608 | ||
609 | session->main_context = NULL; | |
610 | ret = SR_OK; | |
611 | } else { | |
612 | /* May happen if the set/unset calls are not matched. | |
613 | */ | |
614 | sr_err("No main context to unset."); | |
615 | ret = SR_ERR; | |
616 | } | |
617 | g_mutex_unlock(&session->main_mutex); | |
618 | ||
619 | return ret; | |
620 | } | |
621 | ||
622 | /** | |
623 | * Start a session. | |
624 | * | |
625 | * @param session The session to use. Must not be NULL. | |
626 | * | |
627 | * @retval SR_OK Success. | |
628 | * @retval SR_ERR_ARG Invalid session passed. | |
629 | * | |
630 | * @since 0.4.0 | |
631 | */ | |
632 | SR_API int sr_session_start(struct sr_session *session) | |
633 | { | |
634 | struct sr_dev_inst *sdi; | |
635 | struct sr_channel *ch; | |
636 | GSList *l, *c; | |
637 | int enabled_channels, ret; | |
638 | ||
639 | if (!session) { | |
640 | sr_err("%s: session was NULL", __func__); | |
641 | return SR_ERR_ARG; | |
642 | } | |
643 | ||
644 | if (!session->devs) { | |
645 | sr_err("%s: session->devs was NULL; a session " | |
646 | "cannot be started without devices.", __func__); | |
647 | return SR_ERR_ARG; | |
648 | } | |
649 | ||
650 | if (session->trigger && verify_trigger(session->trigger) != SR_OK) | |
651 | return SR_ERR; | |
652 | ||
653 | ret = set_main_context(session); | |
654 | if (ret != SR_OK) | |
655 | return ret; | |
656 | ||
657 | session->running = TRUE; | |
658 | ||
659 | sr_info("Starting."); | |
660 | ||
661 | for (l = session->devs; l; l = l->next) { | |
662 | sdi = l->data; | |
663 | enabled_channels = 0; | |
664 | for (c = sdi->channels; c; c = c->next) { | |
665 | ch = c->data; | |
666 | if (ch->enabled) { | |
667 | enabled_channels++; | |
668 | break; | |
669 | } | |
670 | } | |
671 | if (enabled_channels == 0) { | |
672 | ret = SR_ERR; | |
673 | sr_err("%s using connection %s has no enabled channels!", | |
674 | sdi->driver->name, sdi->connection_id); | |
675 | break; | |
676 | } | |
677 | ||
678 | if ((ret = sr_config_commit(sdi)) != SR_OK) { | |
679 | sr_err("Failed to commit device settings before " | |
680 | "starting acquisition (%s)", sr_strerror(ret)); | |
681 | break; | |
682 | } | |
683 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
684 | sr_err("%s: could not start an acquisition " | |
685 | "(%s)", __func__, sr_strerror(ret)); | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | if (ret != SR_OK) { | |
691 | unset_main_context(session); | |
692 | session->running = FALSE; | |
693 | } | |
694 | /* TODO: What if there are multiple devices? Which return code? */ | |
695 | ||
696 | return ret; | |
697 | } | |
698 | ||
699 | /** | |
700 | * Run a session. | |
701 | * | |
702 | * @param session The session to use. Must not be NULL. | |
703 | * | |
704 | * @retval SR_OK Success. | |
705 | * @retval SR_ERR_ARG Invalid session passed. | |
706 | * @retval SR_ERR Error during event processing. | |
707 | * | |
708 | * @since 0.4.0 | |
709 | */ | |
710 | SR_API int sr_session_run(struct sr_session *session) | |
711 | { | |
712 | if (!session) { | |
713 | sr_err("%s: session was NULL", __func__); | |
714 | return SR_ERR_ARG; | |
715 | } | |
716 | if (!session->devs) { | |
717 | /* TODO: Actually the case? */ | |
718 | sr_err("%s: session->devs was NULL; a session " | |
719 | "cannot be run without devices.", __func__); | |
720 | return SR_ERR_ARG; | |
721 | } | |
722 | if (session->main_loop) { | |
723 | sr_err("Main loop already created."); | |
724 | return SR_ERR; | |
725 | } | |
726 | if (g_hash_table_size(session->event_sources) == 0) { | |
727 | sr_err("Refusing to run without any event sources."); | |
728 | return SR_ERR; | |
729 | } | |
730 | ||
731 | g_mutex_lock(&session->main_mutex); | |
732 | if (!session->main_context) { | |
733 | sr_err("Cannot run without main context."); | |
734 | g_mutex_unlock(&session->main_mutex); | |
735 | return SR_ERR; | |
736 | } | |
737 | sr_info("Running."); | |
738 | ||
739 | session->main_loop = g_main_loop_new(session->main_context, FALSE); | |
740 | g_mutex_unlock(&session->main_mutex); | |
741 | ||
742 | g_main_loop_run(session->main_loop); | |
743 | ||
744 | g_main_loop_unref(session->main_loop); | |
745 | session->main_loop = NULL; | |
746 | ||
747 | return SR_OK; | |
748 | } | |
749 | ||
750 | static gboolean session_stop_sync(void *user_data) | |
751 | { | |
752 | struct sr_session *session; | |
753 | struct sr_dev_inst *sdi; | |
754 | GSList *node; | |
755 | ||
756 | session = user_data; | |
757 | ||
758 | if (!session->running) | |
759 | return G_SOURCE_REMOVE; | |
760 | ||
761 | sr_info("Stopping."); | |
762 | ||
763 | for (node = session->devs; node; node = node->next) { | |
764 | sdi = node->data; | |
765 | if (sdi->driver && sdi->driver->dev_acquisition_stop) | |
766 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
767 | } | |
768 | session->running = FALSE; | |
769 | ||
770 | return G_SOURCE_REMOVE; | |
771 | } | |
772 | ||
773 | /** | |
774 | * Stop a session. | |
775 | * | |
776 | * The session is stopped immediately, with all acquisition sessions being | |
777 | * stopped and hardware drivers cleaned up. | |
778 | * | |
779 | * If the session is run in a separate thread, this function will not block | |
780 | * until the session is finished executing. It is the caller's responsibility | |
781 | * to wait for the session thread to return before assuming that the session is | |
782 | * completely decommissioned. | |
783 | * | |
784 | * @param session The session to use. Must not be NULL. | |
785 | * | |
786 | * @retval SR_OK Success. | |
787 | * @retval SR_ERR_ARG Invalid session passed. | |
788 | * @retval SR_ERR Other error. | |
789 | * | |
790 | * @since 0.4.0 | |
791 | */ | |
792 | SR_API int sr_session_stop(struct sr_session *session) | |
793 | { | |
794 | if (!session) { | |
795 | sr_err("%s: session was NULL", __func__); | |
796 | return SR_ERR_ARG; | |
797 | } | |
798 | g_mutex_lock(&session->main_mutex); | |
799 | ||
800 | if (session->main_context) { | |
801 | g_main_context_invoke(session->main_context, | |
802 | &session_stop_sync, session); | |
803 | } else { | |
804 | sr_err("No main context set; already stopped?"); | |
805 | } | |
806 | g_mutex_unlock(&session->main_mutex); | |
807 | ||
808 | return unset_main_context(session); | |
809 | } | |
810 | ||
811 | /** | |
812 | * Debug helper. | |
813 | * | |
814 | * @param packet The packet to show debugging information for. | |
815 | */ | |
816 | static void datafeed_dump(const struct sr_datafeed_packet *packet) | |
817 | { | |
818 | const struct sr_datafeed_logic *logic; | |
819 | const struct sr_datafeed_analog *analog; | |
820 | const struct sr_datafeed_analog2 *analog2; | |
821 | ||
822 | /* Please use the same order as in libsigrok.h. */ | |
823 | switch (packet->type) { | |
824 | case SR_DF_HEADER: | |
825 | sr_dbg("bus: Received SR_DF_HEADER packet."); | |
826 | break; | |
827 | case SR_DF_END: | |
828 | sr_dbg("bus: Received SR_DF_END packet."); | |
829 | break; | |
830 | case SR_DF_META: | |
831 | sr_dbg("bus: Received SR_DF_META packet."); | |
832 | break; | |
833 | case SR_DF_TRIGGER: | |
834 | sr_dbg("bus: Received SR_DF_TRIGGER packet."); | |
835 | break; | |
836 | case SR_DF_LOGIC: | |
837 | logic = packet->payload; | |
838 | sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes, " | |
839 | "unitsize = %d).", logic->length, logic->unitsize); | |
840 | break; | |
841 | case SR_DF_ANALOG: | |
842 | analog = packet->payload; | |
843 | sr_dbg("bus: Received SR_DF_ANALOG packet (%d samples).", | |
844 | analog->num_samples); | |
845 | break; | |
846 | case SR_DF_FRAME_BEGIN: | |
847 | sr_dbg("bus: Received SR_DF_FRAME_BEGIN packet."); | |
848 | break; | |
849 | case SR_DF_FRAME_END: | |
850 | sr_dbg("bus: Received SR_DF_FRAME_END packet."); | |
851 | break; | |
852 | case SR_DF_ANALOG2: | |
853 | analog2 = packet->payload; | |
854 | sr_dbg("bus: Received SR_DF_ANALOG2 packet (%d samples).", | |
855 | analog2->num_samples); | |
856 | break; | |
857 | default: | |
858 | sr_dbg("bus: Received unknown packet type: %d.", packet->type); | |
859 | break; | |
860 | } | |
861 | } | |
862 | ||
863 | /** | |
864 | * Send a packet to whatever is listening on the datafeed bus. | |
865 | * | |
866 | * Hardware drivers use this to send a data packet to the frontend. | |
867 | * | |
868 | * @param sdi TODO. | |
869 | * @param packet The datafeed packet to send to the session bus. | |
870 | * | |
871 | * @retval SR_OK Success. | |
872 | * @retval SR_ERR_ARG Invalid argument. | |
873 | * | |
874 | * @private | |
875 | */ | |
876 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, | |
877 | const struct sr_datafeed_packet *packet) | |
878 | { | |
879 | GSList *l; | |
880 | struct datafeed_callback *cb_struct; | |
881 | struct sr_datafeed_packet *packet_in, *packet_out; | |
882 | struct sr_transform *t; | |
883 | int ret; | |
884 | ||
885 | if (!sdi) { | |
886 | sr_err("%s: sdi was NULL", __func__); | |
887 | return SR_ERR_ARG; | |
888 | } | |
889 | ||
890 | if (!packet) { | |
891 | sr_err("%s: packet was NULL", __func__); | |
892 | return SR_ERR_ARG; | |
893 | } | |
894 | ||
895 | if (!sdi->session) { | |
896 | sr_err("%s: session was NULL", __func__); | |
897 | return SR_ERR_BUG; | |
898 | } | |
899 | ||
900 | /* | |
901 | * Pass the packet to the first transform module. If that returns | |
902 | * another packet (instead of NULL), pass that packet to the next | |
903 | * transform module in the list, and so on. | |
904 | */ | |
905 | packet_in = (struct sr_datafeed_packet *)packet; | |
906 | for (l = sdi->session->transforms; l; l = l->next) { | |
907 | t = l->data; | |
908 | sr_spew("Running transform module '%s'.", t->module->id); | |
909 | ret = t->module->receive(t, packet_in, &packet_out); | |
910 | if (ret < 0) { | |
911 | sr_err("Error while running transform module: %d.", ret); | |
912 | return SR_ERR; | |
913 | } | |
914 | if (!packet_out) { | |
915 | /* | |
916 | * If any of the transforms don't return an output | |
917 | * packet, abort. | |
918 | */ | |
919 | sr_spew("Transform module didn't return a packet, aborting."); | |
920 | return SR_OK; | |
921 | } else { | |
922 | /* | |
923 | * Use this transform module's output packet as input | |
924 | * for the next transform module. | |
925 | */ | |
926 | packet_in = packet_out; | |
927 | } | |
928 | } | |
929 | packet = packet_in; | |
930 | ||
931 | /* | |
932 | * If the last transform did output a packet, pass it to all datafeed | |
933 | * callbacks. | |
934 | */ | |
935 | for (l = sdi->session->datafeed_callbacks; l; l = l->next) { | |
936 | if (sr_log_loglevel_get() >= SR_LOG_DBG) | |
937 | datafeed_dump(packet); | |
938 | cb_struct = l->data; | |
939 | cb_struct->cb(sdi, packet, cb_struct->cb_data); | |
940 | } | |
941 | ||
942 | return SR_OK; | |
943 | } | |
944 | ||
945 | /** | |
946 | * Add an event source for a file descriptor. | |
947 | * | |
948 | * @param session The session to use. Must not be NULL. | |
949 | * @param key The key which identifies the event source. | |
950 | * @param source An event source object. Must not be NULL. | |
951 | * @retval SR_OK Success. | |
952 | * @retval SR_ERR_ARG Invalid argument. | |
953 | * @retval SR_ERR_BUG Event source with @a key already installed. | |
954 | * @retval SR_ERR Other error. | |
955 | */ | |
956 | SR_PRIV int sr_session_source_add_internal(struct sr_session *session, | |
957 | void *key, GSource *source) | |
958 | { | |
959 | int ret; | |
960 | /* | |
961 | * This must not ever happen, since the source has already been | |
962 | * created and its finalize() method will remove the key for the | |
963 | * already installed source. (Well it would, if we did not have | |
964 | * another sanity check there.) | |
965 | */ | |
966 | if (g_hash_table_contains(session->event_sources, key)) { | |
967 | sr_err("Event source with key %p already exists.", key); | |
968 | return SR_ERR_BUG; | |
969 | } | |
970 | g_hash_table_insert(session->event_sources, key, source); | |
971 | ||
972 | g_mutex_lock(&session->main_mutex); | |
973 | ||
974 | if (session->main_context) { | |
975 | if (g_source_attach(source, session->main_context) > 0) | |
976 | ret = SR_OK; | |
977 | else | |
978 | ret = SR_ERR; | |
979 | } else { | |
980 | sr_err("Cannot add event source without main context."); | |
981 | ret = SR_ERR; | |
982 | } | |
983 | g_mutex_unlock(&session->main_mutex); | |
984 | ||
985 | return ret; | |
986 | } | |
987 | ||
988 | static int attach_fd_source(struct sr_session *session, | |
989 | void *key, int fd, int events, int timeout, | |
990 | sr_receive_data_callback cb, void *cb_data) | |
991 | { | |
992 | GSource *source; | |
993 | int ret; | |
994 | ||
995 | source = fd_source_new(session, key, fd, events, timeout); | |
996 | if (!source) | |
997 | return SR_ERR; | |
998 | ||
999 | g_source_set_callback(source, (GSourceFunc)cb, cb_data, NULL); | |
1000 | ||
1001 | ret = sr_session_source_add_internal(session, key, source); | |
1002 | g_source_unref(source); | |
1003 | ||
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | /** | |
1008 | * Add an event source for a file descriptor. | |
1009 | * | |
1010 | * @param session The session to use. Must not be NULL. | |
1011 | * @param fd The file descriptor, or a negative value to create a timer source. | |
1012 | * @param events Events to check for. | |
1013 | * @param timeout Max time in ms to wait before the callback is called, | |
1014 | * or -1 to wait indefinitely. | |
1015 | * @param cb Callback function to add. Must not be NULL. | |
1016 | * @param cb_data Data for the callback function. Can be NULL. | |
1017 | * | |
1018 | * @retval SR_OK Success. | |
1019 | * @retval SR_ERR_ARG Invalid argument. | |
1020 | * | |
1021 | * @since 0.3.0 | |
1022 | */ | |
1023 | SR_API int sr_session_source_add(struct sr_session *session, int fd, | |
1024 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
1025 | { | |
1026 | if (fd < 0 && timeout < 0) { | |
1027 | sr_err("Cannot create timer source without timeout."); | |
1028 | return SR_ERR_ARG; | |
1029 | } | |
1030 | return attach_fd_source(session, GINT_TO_POINTER(fd), | |
1031 | fd, events, timeout, cb, cb_data); | |
1032 | } | |
1033 | ||
1034 | /** | |
1035 | * Add an event source for a GPollFD. | |
1036 | * | |
1037 | * @param session The session to use. Must not be NULL. | |
1038 | * @param pollfd The GPollFD. Must not be NULL. | |
1039 | * @param timeout Max time in ms to wait before the callback is called, | |
1040 | * or -1 to wait indefinitely. | |
1041 | * @param cb Callback function to add. Must not be NULL. | |
1042 | * @param cb_data Data for the callback function. Can be NULL. | |
1043 | * | |
1044 | * @retval SR_OK Success. | |
1045 | * @retval SR_ERR_ARG Invalid argument. | |
1046 | * | |
1047 | * @since 0.3.0 | |
1048 | */ | |
1049 | SR_API int sr_session_source_add_pollfd(struct sr_session *session, | |
1050 | GPollFD *pollfd, int timeout, sr_receive_data_callback cb, | |
1051 | void *cb_data) | |
1052 | { | |
1053 | if (!pollfd) { | |
1054 | sr_err("%s: pollfd was NULL", __func__); | |
1055 | return SR_ERR_ARG; | |
1056 | } | |
1057 | return attach_fd_source(session, pollfd, pollfd->fd, | |
1058 | pollfd->events, timeout, cb, cb_data); | |
1059 | } | |
1060 | ||
1061 | /** | |
1062 | * Add an event source for a GIOChannel. | |
1063 | * | |
1064 | * @param session The session to use. Must not be NULL. | |
1065 | * @param channel The GIOChannel. | |
1066 | * @param events Events to poll on. | |
1067 | * @param timeout Max time in ms to wait before the callback is called, | |
1068 | * or -1 to wait indefinitely. | |
1069 | * @param cb Callback function to add. Must not be NULL. | |
1070 | * @param cb_data Data for the callback function. Can be NULL. | |
1071 | * | |
1072 | * @retval SR_OK Success. | |
1073 | * @retval SR_ERR_ARG Invalid argument. | |
1074 | * | |
1075 | * @since 0.3.0 | |
1076 | */ | |
1077 | SR_API int sr_session_source_add_channel(struct sr_session *session, | |
1078 | GIOChannel *channel, int events, int timeout, | |
1079 | sr_receive_data_callback cb, void *cb_data) | |
1080 | { | |
1081 | GPollFD pollfd; | |
1082 | ||
1083 | if (!channel) { | |
1084 | sr_err("%s: channel was NULL", __func__); | |
1085 | return SR_ERR_ARG; | |
1086 | } | |
1087 | /* We should be using g_io_create_watch(), but can't without | |
1088 | * changing the driver API, as the callback signature is different. | |
1089 | */ | |
1090 | #ifdef G_OS_WIN32 | |
1091 | g_io_channel_win32_make_pollfd(channel, events, &pollfd); | |
1092 | #else | |
1093 | pollfd.fd = g_io_channel_unix_get_fd(channel); | |
1094 | pollfd.events = events; | |
1095 | #endif | |
1096 | return attach_fd_source(session, channel, pollfd.fd, | |
1097 | pollfd.events, timeout, cb, cb_data); | |
1098 | } | |
1099 | ||
1100 | /** | |
1101 | * Remove the source identified by the specified poll object. | |
1102 | * | |
1103 | * @param session The session to use. Must not be NULL. | |
1104 | * @param key The key by which the source is identified. | |
1105 | * | |
1106 | * @retval SR_OK Success | |
1107 | * @retval SR_ERR_BUG No event source for poll_object found. | |
1108 | */ | |
1109 | SR_PRIV int sr_session_source_remove_internal(struct sr_session *session, | |
1110 | void *key) | |
1111 | { | |
1112 | GSource *source; | |
1113 | ||
1114 | source = g_hash_table_lookup(session->event_sources, key); | |
1115 | /* | |
1116 | * Trying to remove an already removed event source is problematic | |
1117 | * since the poll_object handle may have been reused in the meantime. | |
1118 | */ | |
1119 | if (!source) { | |
1120 | sr_warn("Cannot remove non-existing event source %p.", key); | |
1121 | return SR_ERR_BUG; | |
1122 | } | |
1123 | g_source_destroy(source); | |
1124 | ||
1125 | return SR_OK; | |
1126 | } | |
1127 | ||
1128 | /** | |
1129 | * Remove the source belonging to the specified file descriptor. | |
1130 | * | |
1131 | * @param session The session to use. Must not be NULL. | |
1132 | * @param fd The file descriptor for which the source should be removed. | |
1133 | * | |
1134 | * @retval SR_OK Success | |
1135 | * @retval SR_ERR_ARG Invalid argument | |
1136 | * @retval SR_ERR_BUG Internal error. | |
1137 | * | |
1138 | * @since 0.3.0 | |
1139 | */ | |
1140 | SR_API int sr_session_source_remove(struct sr_session *session, int fd) | |
1141 | { | |
1142 | return sr_session_source_remove_internal(session, GINT_TO_POINTER(fd)); | |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * Remove the source belonging to the specified poll descriptor. | |
1147 | * | |
1148 | * @param session The session to use. Must not be NULL. | |
1149 | * @param pollfd The poll descriptor for which the source should be removed. | |
1150 | * Must not be NULL. | |
1151 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
1152 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
1153 | * internal errors. | |
1154 | * | |
1155 | * @since 0.2.0 | |
1156 | */ | |
1157 | SR_API int sr_session_source_remove_pollfd(struct sr_session *session, | |
1158 | GPollFD *pollfd) | |
1159 | { | |
1160 | if (!pollfd) { | |
1161 | sr_err("%s: pollfd was NULL", __func__); | |
1162 | return SR_ERR_ARG; | |
1163 | } | |
1164 | return sr_session_source_remove_internal(session, pollfd); | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * Remove the source belonging to the specified channel. | |
1169 | * | |
1170 | * @param session The session to use. Must not be NULL. | |
1171 | * @param channel The channel for which the source should be removed. | |
1172 | * Must not be NULL. | |
1173 | * @retval SR_OK Success. | |
1174 | * @retval SR_ERR_ARG Invalid argument. | |
1175 | * @return SR_ERR_BUG Internal error. | |
1176 | * | |
1177 | * @since 0.2.0 | |
1178 | */ | |
1179 | SR_API int sr_session_source_remove_channel(struct sr_session *session, | |
1180 | GIOChannel *channel) | |
1181 | { | |
1182 | if (!channel) { | |
1183 | sr_err("%s: channel was NULL", __func__); | |
1184 | return SR_ERR_ARG; | |
1185 | } | |
1186 | return sr_session_source_remove_internal(session, channel); | |
1187 | } | |
1188 | ||
1189 | /** Unregister an event source that has been destroyed. | |
1190 | * | |
1191 | * This is intended to be called from a source's finalize() method. | |
1192 | * | |
1193 | * @param session The session to use. Must not be NULL. | |
1194 | * @param key The key used to identify @a source. | |
1195 | * @param source The source object that was destroyed. | |
1196 | * | |
1197 | * @retval SR_OK Success. | |
1198 | * @retval SR_ERR_BUG Event source for @a key does not match @a source. | |
1199 | */ | |
1200 | SR_PRIV int sr_session_source_destroyed(struct sr_session *session, | |
1201 | void *key, GSource *source) | |
1202 | { | |
1203 | GSource *registered_source; | |
1204 | ||
1205 | registered_source = g_hash_table_lookup(session->event_sources, key); | |
1206 | /* | |
1207 | * Trying to remove an already removed event source is problematic | |
1208 | * since the poll_object handle may have been reused in the meantime. | |
1209 | */ | |
1210 | if (!registered_source) { | |
1211 | sr_err("No event source for key %p found.", key); | |
1212 | return SR_ERR_BUG; | |
1213 | } | |
1214 | if (registered_source != source) { | |
1215 | sr_err("Event source for key %p does not match" | |
1216 | " destroyed source.", key); | |
1217 | return SR_ERR_BUG; | |
1218 | } | |
1219 | g_hash_table_remove(session->event_sources, key); | |
1220 | /* | |
1221 | * Quit the main loop if we just removed the last event source. | |
1222 | * TODO: This may need an idle callback depending on when event | |
1223 | * sources are finalized. (The issue is remove followed by add | |
1224 | * within the same main loop iteration.) | |
1225 | */ | |
1226 | if (session->main_loop | |
1227 | && g_hash_table_size(session->event_sources) == 0) { | |
1228 | sr_dbg("Stopping main loop..."); | |
1229 | g_main_loop_quit(session->main_loop); | |
1230 | } | |
1231 | return SR_OK; | |
1232 | } | |
1233 | ||
1234 | static void copy_src(struct sr_config *src, struct sr_datafeed_meta *meta_copy) | |
1235 | { | |
1236 | g_variant_ref(src->data); | |
1237 | meta_copy->config = g_slist_append(meta_copy->config, | |
1238 | g_memdup(src, sizeof(struct sr_config))); | |
1239 | } | |
1240 | ||
1241 | SR_PRIV int sr_packet_copy(const struct sr_datafeed_packet *packet, | |
1242 | struct sr_datafeed_packet **copy) | |
1243 | { | |
1244 | const struct sr_datafeed_meta *meta; | |
1245 | struct sr_datafeed_meta *meta_copy; | |
1246 | const struct sr_datafeed_logic *logic; | |
1247 | struct sr_datafeed_logic *logic_copy; | |
1248 | const struct sr_datafeed_analog *analog; | |
1249 | struct sr_datafeed_analog *analog_copy; | |
1250 | uint8_t *payload; | |
1251 | ||
1252 | *copy = g_malloc0(sizeof(struct sr_datafeed_packet)); | |
1253 | (*copy)->type = packet->type; | |
1254 | ||
1255 | switch (packet->type) { | |
1256 | case SR_DF_TRIGGER: | |
1257 | case SR_DF_END: | |
1258 | /* No payload. */ | |
1259 | break; | |
1260 | case SR_DF_HEADER: | |
1261 | payload = g_malloc(sizeof(struct sr_datafeed_header)); | |
1262 | memcpy(payload, packet->payload, sizeof(struct sr_datafeed_header)); | |
1263 | (*copy)->payload = payload; | |
1264 | break; | |
1265 | case SR_DF_META: | |
1266 | meta = packet->payload; | |
1267 | meta_copy = g_malloc0(sizeof(struct sr_datafeed_meta)); | |
1268 | g_slist_foreach(meta->config, (GFunc)copy_src, meta_copy->config); | |
1269 | (*copy)->payload = meta_copy; | |
1270 | break; | |
1271 | case SR_DF_LOGIC: | |
1272 | logic = packet->payload; | |
1273 | logic_copy = g_malloc(sizeof(logic)); | |
1274 | logic_copy->length = logic->length; | |
1275 | logic_copy->unitsize = logic->unitsize; | |
1276 | memcpy(logic_copy->data, logic->data, logic->length * logic->unitsize); | |
1277 | (*copy)->payload = logic_copy; | |
1278 | break; | |
1279 | case SR_DF_ANALOG: | |
1280 | analog = packet->payload; | |
1281 | analog_copy = g_malloc(sizeof(analog)); | |
1282 | analog_copy->channels = g_slist_copy(analog->channels); | |
1283 | analog_copy->num_samples = analog->num_samples; | |
1284 | analog_copy->mq = analog->mq; | |
1285 | analog_copy->unit = analog->unit; | |
1286 | analog_copy->mqflags = analog->mqflags; | |
1287 | memcpy(analog_copy->data, analog->data, | |
1288 | analog->num_samples * sizeof(float)); | |
1289 | (*copy)->payload = analog_copy; | |
1290 | break; | |
1291 | default: | |
1292 | sr_err("Unknown packet type %d", packet->type); | |
1293 | return SR_ERR; | |
1294 | } | |
1295 | ||
1296 | return SR_OK; | |
1297 | } | |
1298 | ||
1299 | void sr_packet_free(struct sr_datafeed_packet *packet) | |
1300 | { | |
1301 | const struct sr_datafeed_meta *meta; | |
1302 | const struct sr_datafeed_logic *logic; | |
1303 | const struct sr_datafeed_analog *analog; | |
1304 | struct sr_config *src; | |
1305 | GSList *l; | |
1306 | ||
1307 | switch (packet->type) { | |
1308 | case SR_DF_TRIGGER: | |
1309 | case SR_DF_END: | |
1310 | /* No payload. */ | |
1311 | break; | |
1312 | case SR_DF_HEADER: | |
1313 | /* Payload is a simple struct. */ | |
1314 | g_free((void *)packet->payload); | |
1315 | break; | |
1316 | case SR_DF_META: | |
1317 | meta = packet->payload; | |
1318 | for (l = meta->config; l; l = l->next) { | |
1319 | src = l->data; | |
1320 | g_variant_unref(src->data); | |
1321 | g_free(src); | |
1322 | } | |
1323 | g_slist_free(meta->config); | |
1324 | g_free((void *)packet->payload); | |
1325 | break; | |
1326 | case SR_DF_LOGIC: | |
1327 | logic = packet->payload; | |
1328 | g_free(logic->data); | |
1329 | g_free((void *)packet->payload); | |
1330 | break; | |
1331 | case SR_DF_ANALOG: | |
1332 | analog = packet->payload; | |
1333 | g_slist_free(analog->channels); | |
1334 | g_free(analog->data); | |
1335 | g_free((void *)packet->payload); | |
1336 | break; | |
1337 | default: | |
1338 | sr_err("Unknown packet type %d", packet->type); | |
1339 | } | |
1340 | g_free(packet); | |
1341 | ||
1342 | } | |
1343 | ||
1344 | /** @} */ |