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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 | * | |
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 <errno.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <unistd.h> | |
24 | #include <string.h> | |
25 | #include <glib.h> | |
26 | #include <libsigrok/libsigrok.h> | |
27 | #include "libsigrok-internal.h" | |
28 | ||
29 | /** @cond PRIVATE */ | |
30 | #define LOG_PREFIX "session" | |
31 | /** @endcond */ | |
32 | ||
33 | /** | |
34 | * @file | |
35 | * | |
36 | * Creating, using, or destroying libsigrok sessions. | |
37 | */ | |
38 | ||
39 | /** | |
40 | * @defgroup grp_session Session handling | |
41 | * | |
42 | * Creating, using, or destroying libsigrok sessions. | |
43 | * | |
44 | * @{ | |
45 | */ | |
46 | ||
47 | struct source { | |
48 | int64_t timeout; /* microseconds */ | |
49 | int64_t due; /* microseconds */ | |
50 | ||
51 | sr_receive_data_callback cb; | |
52 | void *cb_data; | |
53 | ||
54 | /* This is used to keep track of the object (fd, pollfd or channel) which is | |
55 | * being polled and will be used to match the source when removing it again. | |
56 | */ | |
57 | gintptr poll_object; | |
58 | ||
59 | /* Number of fds to poll for this source. This will be 0 for timer | |
60 | * sources, 1 for normal I/O sources, and 1 or more for libusb I/O | |
61 | * sources on Unix platforms. | |
62 | */ | |
63 | int num_fds; | |
64 | ||
65 | gboolean triggered; | |
66 | }; | |
67 | ||
68 | struct datafeed_callback { | |
69 | sr_datafeed_callback cb; | |
70 | void *cb_data; | |
71 | }; | |
72 | ||
73 | /** | |
74 | * Create a new session. | |
75 | * | |
76 | * @param ctx The context in which to create the new session. | |
77 | * @param new_session This will contain a pointer to the newly created | |
78 | * session if the return value is SR_OK, otherwise the value | |
79 | * is undefined and should not be used. Must not be NULL. | |
80 | * | |
81 | * @retval SR_OK Success. | |
82 | * @retval SR_ERR_ARG Invalid argument. | |
83 | * | |
84 | * @since 0.4.0 | |
85 | */ | |
86 | SR_API int sr_session_new(struct sr_context *ctx, | |
87 | struct sr_session **new_session) | |
88 | { | |
89 | struct sr_session *session; | |
90 | ||
91 | if (!new_session) | |
92 | return SR_ERR_ARG; | |
93 | ||
94 | session = g_malloc0(sizeof(struct sr_session)); | |
95 | ||
96 | session->ctx = ctx; | |
97 | ||
98 | session->sources = g_array_new(FALSE, FALSE, sizeof(struct source)); | |
99 | session->pollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD)); | |
100 | ||
101 | g_mutex_init(&session->stop_mutex); | |
102 | ||
103 | *new_session = session; | |
104 | ||
105 | return SR_OK; | |
106 | } | |
107 | ||
108 | /** | |
109 | * Destroy a session. | |
110 | * This frees up all memory used by the session. | |
111 | * | |
112 | * @param session The session to destroy. Must not be NULL. | |
113 | * | |
114 | * @retval SR_OK Success. | |
115 | * @retval SR_ERR_ARG Invalid session passed. | |
116 | * | |
117 | * @since 0.4.0 | |
118 | */ | |
119 | SR_API int sr_session_destroy(struct sr_session *session) | |
120 | { | |
121 | if (!session) { | |
122 | sr_err("%s: session was NULL", __func__); | |
123 | return SR_ERR_ARG; | |
124 | } | |
125 | ||
126 | sr_session_dev_remove_all(session); | |
127 | g_mutex_clear(&session->stop_mutex); | |
128 | ||
129 | g_slist_free_full(session->owned_devs, (GDestroyNotify)sr_dev_inst_free); | |
130 | ||
131 | g_array_unref(session->pollfds); | |
132 | g_array_unref(session->sources); | |
133 | ||
134 | g_free(session); | |
135 | ||
136 | return SR_OK; | |
137 | } | |
138 | ||
139 | /** | |
140 | * Remove all the devices from a session. | |
141 | * | |
142 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
143 | * exists after this function returns. | |
144 | * | |
145 | * @param session The session to use. Must not be NULL. | |
146 | * | |
147 | * @retval SR_OK Success. | |
148 | * @retval SR_ERR_BUG Invalid session passed. | |
149 | * | |
150 | * @since 0.4.0 | |
151 | */ | |
152 | SR_API int sr_session_dev_remove_all(struct sr_session *session) | |
153 | { | |
154 | struct sr_dev_inst *sdi; | |
155 | GSList *l; | |
156 | ||
157 | if (!session) { | |
158 | sr_err("%s: session was NULL", __func__); | |
159 | return SR_ERR_ARG; | |
160 | } | |
161 | ||
162 | for (l = session->devs; l; l = l->next) { | |
163 | sdi = (struct sr_dev_inst *) l->data; | |
164 | sdi->session = NULL; | |
165 | } | |
166 | ||
167 | g_slist_free(session->devs); | |
168 | session->devs = NULL; | |
169 | ||
170 | return SR_OK; | |
171 | } | |
172 | ||
173 | /** | |
174 | * Add a device instance to a session. | |
175 | * | |
176 | * @param session The session to add to. Must not be NULL. | |
177 | * @param sdi The device instance to add to a session. Must not | |
178 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must | |
179 | * not be NULL. | |
180 | * | |
181 | * @retval SR_OK Success. | |
182 | * @retval SR_ERR_ARG Invalid argument. | |
183 | * | |
184 | * @since 0.4.0 | |
185 | */ | |
186 | SR_API int sr_session_dev_add(struct sr_session *session, | |
187 | struct sr_dev_inst *sdi) | |
188 | { | |
189 | int ret; | |
190 | ||
191 | if (!sdi) { | |
192 | sr_err("%s: sdi was NULL", __func__); | |
193 | return SR_ERR_ARG; | |
194 | } | |
195 | ||
196 | if (!session) { | |
197 | sr_err("%s: session was NULL", __func__); | |
198 | return SR_ERR_ARG; | |
199 | } | |
200 | ||
201 | /* If sdi->session is not NULL, the device is already in this or | |
202 | * another session. */ | |
203 | if (sdi->session) { | |
204 | sr_err("%s: already assigned to session", __func__); | |
205 | return SR_ERR_ARG; | |
206 | } | |
207 | ||
208 | /* If sdi->driver is NULL, this is a virtual device. */ | |
209 | if (!sdi->driver) { | |
210 | /* Just add the device, don't run dev_open(). */ | |
211 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
212 | sdi->session = session; | |
213 | return SR_OK; | |
214 | } | |
215 | ||
216 | /* sdi->driver is non-NULL (i.e. we have a real device). */ | |
217 | if (!sdi->driver->dev_open) { | |
218 | sr_err("%s: sdi->driver->dev_open was NULL", __func__); | |
219 | return SR_ERR_BUG; | |
220 | } | |
221 | ||
222 | session->devs = g_slist_append(session->devs, (gpointer)sdi); | |
223 | sdi->session = session; | |
224 | ||
225 | if (session->running) { | |
226 | /* Adding a device to a running session. Commit settings | |
227 | * and start acquisition on that device now. */ | |
228 | if ((ret = sr_config_commit(sdi)) != SR_OK) { | |
229 | sr_err("Failed to commit device settings before " | |
230 | "starting acquisition in running session (%s)", | |
231 | sr_strerror(ret)); | |
232 | return ret; | |
233 | } | |
234 | if ((ret = sdi->driver->dev_acquisition_start(sdi, | |
235 | (void *)sdi)) != SR_OK) { | |
236 | sr_err("Failed to start acquisition of device in " | |
237 | "running session (%s)", sr_strerror(ret)); | |
238 | return ret; | |
239 | } | |
240 | } | |
241 | ||
242 | return SR_OK; | |
243 | } | |
244 | ||
245 | /** | |
246 | * List all device instances attached to a session. | |
247 | * | |
248 | * @param session The session to use. Must not be NULL. | |
249 | * @param devlist A pointer where the device instance list will be | |
250 | * stored on return. If no devices are in the session, | |
251 | * this will be NULL. Each element in the list points | |
252 | * to a struct sr_dev_inst *. | |
253 | * The list must be freed by the caller, but not the | |
254 | * elements pointed to. | |
255 | * | |
256 | * @retval SR_OK Success. | |
257 | * @retval SR_ERR_ARG Invalid argument. | |
258 | * | |
259 | * @since 0.4.0 | |
260 | */ | |
261 | SR_API int sr_session_dev_list(struct sr_session *session, GSList **devlist) | |
262 | { | |
263 | if (!session) | |
264 | return SR_ERR_ARG; | |
265 | ||
266 | if (!devlist) | |
267 | return SR_ERR_ARG; | |
268 | ||
269 | *devlist = g_slist_copy(session->devs); | |
270 | ||
271 | return SR_OK; | |
272 | } | |
273 | ||
274 | /** | |
275 | * Remove all datafeed callbacks in a session. | |
276 | * | |
277 | * @param session The session to use. Must not be NULL. | |
278 | * | |
279 | * @retval SR_OK Success. | |
280 | * @retval SR_ERR_ARG Invalid session passed. | |
281 | * | |
282 | * @since 0.4.0 | |
283 | */ | |
284 | SR_API int sr_session_datafeed_callback_remove_all(struct sr_session *session) | |
285 | { | |
286 | if (!session) { | |
287 | sr_err("%s: session was NULL", __func__); | |
288 | return SR_ERR_ARG; | |
289 | } | |
290 | ||
291 | g_slist_free_full(session->datafeed_callbacks, g_free); | |
292 | session->datafeed_callbacks = NULL; | |
293 | ||
294 | return SR_OK; | |
295 | } | |
296 | ||
297 | /** | |
298 | * Add a datafeed callback to a session. | |
299 | * | |
300 | * @param session The session to use. Must not be NULL. | |
301 | * @param cb Function to call when a chunk of data is received. | |
302 | * Must not be NULL. | |
303 | * @param cb_data Opaque pointer passed in by the caller. | |
304 | * | |
305 | * @retval SR_OK Success. | |
306 | * @retval SR_ERR_BUG No session exists. | |
307 | * | |
308 | * @since 0.3.0 | |
309 | */ | |
310 | SR_API int sr_session_datafeed_callback_add(struct sr_session *session, | |
311 | sr_datafeed_callback cb, void *cb_data) | |
312 | { | |
313 | struct datafeed_callback *cb_struct; | |
314 | ||
315 | if (!session) { | |
316 | sr_err("%s: session was NULL", __func__); | |
317 | return SR_ERR_BUG; | |
318 | } | |
319 | ||
320 | if (!cb) { | |
321 | sr_err("%s: cb was NULL", __func__); | |
322 | return SR_ERR_ARG; | |
323 | } | |
324 | ||
325 | cb_struct = g_malloc0(sizeof(struct datafeed_callback)); | |
326 | cb_struct->cb = cb; | |
327 | cb_struct->cb_data = cb_data; | |
328 | ||
329 | session->datafeed_callbacks = | |
330 | g_slist_append(session->datafeed_callbacks, cb_struct); | |
331 | ||
332 | return SR_OK; | |
333 | } | |
334 | ||
335 | /** | |
336 | * Get the trigger assigned to this session. | |
337 | * | |
338 | * @param session The session to use. | |
339 | * | |
340 | * @retval NULL Invalid (NULL) session was passed to the function. | |
341 | * @retval other The trigger assigned to this session (can be NULL). | |
342 | * | |
343 | * @since 0.4.0 | |
344 | */ | |
345 | SR_API struct sr_trigger *sr_session_trigger_get(struct sr_session *session) | |
346 | { | |
347 | if (!session) | |
348 | return NULL; | |
349 | ||
350 | return session->trigger; | |
351 | } | |
352 | ||
353 | /** | |
354 | * Set the trigger of this session. | |
355 | * | |
356 | * @param session The session to use. Must not be NULL. | |
357 | * @param trig The trigger to assign to this session. Can be NULL. | |
358 | * | |
359 | * @retval SR_OK Success. | |
360 | * @retval SR_ERR_ARG Invalid argument. | |
361 | * | |
362 | * @since 0.4.0 | |
363 | */ | |
364 | SR_API int sr_session_trigger_set(struct sr_session *session, struct sr_trigger *trig) | |
365 | { | |
366 | if (!session) | |
367 | return SR_ERR_ARG; | |
368 | ||
369 | session->trigger = trig; | |
370 | ||
371 | return SR_OK; | |
372 | } | |
373 | ||
374 | static gboolean sr_session_check_aborted(struct sr_session *session) | |
375 | { | |
376 | gboolean stop; | |
377 | ||
378 | g_mutex_lock(&session->stop_mutex); | |
379 | stop = session->abort_session; | |
380 | if (stop) { | |
381 | sr_session_stop_sync(session); | |
382 | /* But once is enough. */ | |
383 | session->abort_session = FALSE; | |
384 | } | |
385 | g_mutex_unlock(&session->stop_mutex); | |
386 | ||
387 | return stop; | |
388 | } | |
389 | ||
390 | /** | |
391 | * Poll the session's event sources. | |
392 | * | |
393 | * @param session The session to use. Must not be NULL. | |
394 | * @retval SR_OK Success. | |
395 | * @retval SR_ERR Error occurred. | |
396 | */ | |
397 | static int sr_session_iteration(struct sr_session *session) | |
398 | { | |
399 | int64_t start_time, stop_time, min_due, due; | |
400 | int timeout_ms; | |
401 | unsigned int i; | |
402 | int k, fd_index; | |
403 | int ret; | |
404 | int fd; | |
405 | int revents; | |
406 | gboolean triggered, stopped; | |
407 | struct source *source; | |
408 | GPollFD *pollfd; | |
409 | gintptr poll_object; | |
410 | #if HAVE_LIBUSB_1_0 | |
411 | int64_t usb_timeout; | |
412 | int64_t usb_due; | |
413 | struct timeval tv; | |
414 | #endif | |
415 | if (session->sources->len == 0) { | |
416 | sr_session_check_aborted(session); | |
417 | return SR_OK; | |
418 | } | |
419 | start_time = g_get_monotonic_time(); | |
420 | min_due = INT64_MAX; | |
421 | ||
422 | for (i = 0; i < session->sources->len; ++i) { | |
423 | source = &g_array_index(session->sources, struct source, i); | |
424 | if (source->due < min_due) | |
425 | min_due = source->due; | |
426 | source->triggered = FALSE; | |
427 | } | |
428 | #if HAVE_LIBUSB_1_0 | |
429 | usb_due = INT64_MAX; | |
430 | if (session->ctx->usb_source_present) { | |
431 | ret = libusb_get_next_timeout(session->ctx->libusb_ctx, &tv); | |
432 | if (ret < 0) { | |
433 | sr_err("Error getting libusb timeout: %s", | |
434 | libusb_error_name(ret)); | |
435 | return SR_ERR; | |
436 | } else if (ret == 1) { | |
437 | usb_timeout = (int64_t)tv.tv_sec * G_USEC_PER_SEC | |
438 | + tv.tv_usec; | |
439 | usb_due = start_time + usb_timeout; | |
440 | if (usb_due < min_due) | |
441 | min_due = usb_due; | |
442 | ||
443 | sr_spew("poll: next USB timeout %g ms", | |
444 | 1e-3 * usb_timeout); | |
445 | } | |
446 | } | |
447 | #endif | |
448 | if (min_due == INT64_MAX) | |
449 | timeout_ms = -1; | |
450 | else if (min_due > start_time) | |
451 | timeout_ms = MIN((min_due - start_time + 999) / 1000, INT_MAX); | |
452 | else | |
453 | timeout_ms = 0; | |
454 | ||
455 | sr_spew("poll enter: %u sources, %u fds, %d ms timeout", | |
456 | session->sources->len, session->pollfds->len, timeout_ms); | |
457 | ||
458 | ret = g_poll((GPollFD *)session->pollfds->data, | |
459 | session->pollfds->len, timeout_ms); | |
460 | #ifdef G_OS_UNIX | |
461 | if (ret < 0 && errno != EINTR) { | |
462 | sr_err("Error in poll: %s", g_strerror(errno)); | |
463 | return SR_ERR; | |
464 | } | |
465 | #else | |
466 | if (ret < 0) { | |
467 | sr_err("Error in poll: %d", ret); | |
468 | return SR_ERR; | |
469 | } | |
470 | #endif | |
471 | stop_time = g_get_monotonic_time(); | |
472 | ||
473 | sr_spew("poll leave: %g ms elapsed, %d events", | |
474 | 1e-3 * (stop_time - start_time), ret); | |
475 | ||
476 | triggered = FALSE; | |
477 | stopped = FALSE; | |
478 | fd_index = 0; | |
479 | ||
480 | for (i = 0; i < session->sources->len; ++i) { | |
481 | source = &g_array_index(session->sources, struct source, i); | |
482 | ||
483 | poll_object = source->poll_object; | |
484 | fd = (int)poll_object; | |
485 | revents = 0; | |
486 | ||
487 | for (k = 0; k < source->num_fds; ++k) { | |
488 | pollfd = &g_array_index(session->pollfds, | |
489 | GPollFD, fd_index + k); | |
490 | fd = pollfd->fd; | |
491 | revents |= pollfd->revents; | |
492 | } | |
493 | fd_index += source->num_fds; | |
494 | ||
495 | if (source->triggered) | |
496 | continue; /* already handled */ | |
497 | if (ret > 0 && revents == 0) | |
498 | continue; /* skip timeouts if any I/O event occurred */ | |
499 | ||
500 | /* Make invalid to avoid confusion in case of multiple FDs. */ | |
501 | if (source->num_fds > 1) | |
502 | fd = -1; | |
503 | if (ret <= 0) | |
504 | revents = 0; | |
505 | ||
506 | due = source->due; | |
507 | #if HAVE_LIBUSB_1_0 | |
508 | if (usb_due < due && poll_object | |
509 | == (gintptr)session->ctx->libusb_ctx) | |
510 | due = usb_due; | |
511 | #endif | |
512 | if (revents == 0 && stop_time < due) | |
513 | continue; | |
514 | /* | |
515 | * The source may be gone after the callback returns, | |
516 | * so access any data now that needs accessing. | |
517 | */ | |
518 | if (source->timeout >= 0) | |
519 | source->due = stop_time + source->timeout; | |
520 | source->triggered = TRUE; | |
521 | triggered = TRUE; | |
522 | /* | |
523 | * Invoke the source's callback on an event or timeout. | |
524 | */ | |
525 | sr_spew("callback for event source %" G_GINTPTR_FORMAT " with" | |
526 | " event mask 0x%.2X", poll_object, (unsigned)revents); | |
527 | if (!source->cb(fd, revents, source->cb_data)) { | |
528 | #if HAVE_LIBUSB_1_0 | |
529 | /* Hackish, to be cleaned up when porting to | |
530 | * the GLib main loop. | |
531 | */ | |
532 | if (poll_object == (gintptr)session->ctx->libusb_ctx) | |
533 | usb_source_remove(session, session->ctx); | |
534 | else | |
535 | #endif | |
536 | sr_session_source_remove_internal(session, | |
537 | poll_object); | |
538 | } | |
539 | /* | |
540 | * We want to take as little time as possible to stop | |
541 | * the session if we have been told to do so. Therefore, | |
542 | * we check the flag after processing every source, not | |
543 | * just once per main event loop. | |
544 | */ | |
545 | if (!stopped) | |
546 | stopped = sr_session_check_aborted(session); | |
547 | ||
548 | /* Restart loop as the sources list may have changed. */ | |
549 | fd_index = 0; | |
550 | i = 0; | |
551 | } | |
552 | ||
553 | /* Check for abort at least once per iteration. */ | |
554 | if (!triggered) | |
555 | sr_session_check_aborted(session); | |
556 | ||
557 | return SR_OK; | |
558 | } | |
559 | ||
560 | static int verify_trigger(struct sr_trigger *trigger) | |
561 | { | |
562 | struct sr_trigger_stage *stage; | |
563 | struct sr_trigger_match *match; | |
564 | GSList *l, *m; | |
565 | ||
566 | if (!trigger->stages) { | |
567 | sr_err("No trigger stages defined."); | |
568 | return SR_ERR; | |
569 | } | |
570 | ||
571 | sr_spew("Checking trigger:"); | |
572 | for (l = trigger->stages; l; l = l->next) { | |
573 | stage = l->data; | |
574 | if (!stage->matches) { | |
575 | sr_err("Stage %d has no matches defined.", stage->stage); | |
576 | return SR_ERR; | |
577 | } | |
578 | for (m = stage->matches; m; m = m->next) { | |
579 | match = m->data; | |
580 | if (!match->channel) { | |
581 | sr_err("Stage %d match has no channel.", stage->stage); | |
582 | return SR_ERR; | |
583 | } | |
584 | if (!match->match) { | |
585 | sr_err("Stage %d match is not defined.", stage->stage); | |
586 | return SR_ERR; | |
587 | } | |
588 | sr_spew("Stage %d match on channel %s, match %d", stage->stage, | |
589 | match->channel->name, match->match); | |
590 | } | |
591 | } | |
592 | ||
593 | return SR_OK; | |
594 | } | |
595 | ||
596 | /** | |
597 | * Start a session. | |
598 | * | |
599 | * @param session The session to use. Must not be NULL. | |
600 | * | |
601 | * @retval SR_OK Success. | |
602 | * @retval SR_ERR_ARG Invalid session passed. | |
603 | * | |
604 | * @since 0.4.0 | |
605 | */ | |
606 | SR_API int sr_session_start(struct sr_session *session) | |
607 | { | |
608 | struct sr_dev_inst *sdi; | |
609 | struct sr_channel *ch; | |
610 | GSList *l, *c; | |
611 | int enabled_channels, ret; | |
612 | ||
613 | if (!session) { | |
614 | sr_err("%s: session was NULL", __func__); | |
615 | return SR_ERR_ARG; | |
616 | } | |
617 | ||
618 | if (!session->devs) { | |
619 | sr_err("%s: session->devs was NULL; a session " | |
620 | "cannot be started without devices.", __func__); | |
621 | return SR_ERR_ARG; | |
622 | } | |
623 | ||
624 | if (session->trigger && verify_trigger(session->trigger) != SR_OK) | |
625 | return SR_ERR; | |
626 | ||
627 | sr_info("Starting."); | |
628 | ||
629 | ret = SR_OK; | |
630 | for (l = session->devs; l; l = l->next) { | |
631 | sdi = l->data; | |
632 | enabled_channels = 0; | |
633 | for (c = sdi->channels; c; c = c->next) { | |
634 | ch = c->data; | |
635 | if (ch->enabled) { | |
636 | enabled_channels++; | |
637 | break; | |
638 | } | |
639 | } | |
640 | if (enabled_channels == 0) { | |
641 | ret = SR_ERR; | |
642 | sr_err("%s using connection %s has no enabled channels!", | |
643 | sdi->driver->name, sdi->connection_id); | |
644 | break; | |
645 | } | |
646 | ||
647 | if ((ret = sr_config_commit(sdi)) != SR_OK) { | |
648 | sr_err("Failed to commit device settings before " | |
649 | "starting acquisition (%s)", sr_strerror(ret)); | |
650 | break; | |
651 | } | |
652 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { | |
653 | sr_err("%s: could not start an acquisition " | |
654 | "(%s)", __func__, sr_strerror(ret)); | |
655 | break; | |
656 | } | |
657 | } | |
658 | ||
659 | /* TODO: What if there are multiple devices? Which return code? */ | |
660 | ||
661 | return ret; | |
662 | } | |
663 | ||
664 | /** | |
665 | * Run a session. | |
666 | * | |
667 | * @param session The session to use. Must not be NULL. | |
668 | * | |
669 | * @retval SR_OK Success. | |
670 | * @retval SR_ERR_ARG Invalid session passed. | |
671 | * @retval SR_ERR Error during event processing. | |
672 | * | |
673 | * @since 0.4.0 | |
674 | */ | |
675 | SR_API int sr_session_run(struct sr_session *session) | |
676 | { | |
677 | int ret; | |
678 | ||
679 | if (!session) { | |
680 | sr_err("%s: session was NULL", __func__); | |
681 | return SR_ERR_ARG; | |
682 | } | |
683 | ||
684 | if (!session->devs) { | |
685 | /* TODO: Actually the case? */ | |
686 | sr_err("%s: session->devs was NULL; a session " | |
687 | "cannot be run without devices.", __func__); | |
688 | return SR_ERR_ARG; | |
689 | } | |
690 | session->running = TRUE; | |
691 | ||
692 | sr_info("Running."); | |
693 | ||
694 | /* Poll event sources until none are left. */ | |
695 | while (session->sources->len > 0) { | |
696 | ret = sr_session_iteration(session); | |
697 | if (ret != SR_OK) | |
698 | return ret; | |
699 | } | |
700 | return SR_OK; | |
701 | } | |
702 | ||
703 | /** | |
704 | * Stop a session. | |
705 | * | |
706 | * The session is stopped immediately, with all acquisition sessions stopped | |
707 | * and hardware drivers cleaned up. | |
708 | * | |
709 | * This must be called from within the session thread, to prevent freeing | |
710 | * resources that the session thread will try to use. | |
711 | * | |
712 | * @param session The session to use. Must not be NULL. | |
713 | * | |
714 | * @retval SR_OK Success. | |
715 | * @retval SR_ERR_ARG Invalid session passed. | |
716 | * | |
717 | * @private | |
718 | */ | |
719 | SR_PRIV int sr_session_stop_sync(struct sr_session *session) | |
720 | { | |
721 | struct sr_dev_inst *sdi; | |
722 | GSList *l; | |
723 | ||
724 | if (!session) { | |
725 | sr_err("%s: session was NULL", __func__); | |
726 | return SR_ERR_ARG; | |
727 | } | |
728 | ||
729 | sr_info("Stopping."); | |
730 | ||
731 | for (l = session->devs; l; l = l->next) { | |
732 | sdi = l->data; | |
733 | if (sdi->driver) { | |
734 | if (sdi->driver->dev_acquisition_stop) | |
735 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
736 | } | |
737 | } | |
738 | session->running = FALSE; | |
739 | ||
740 | return SR_OK; | |
741 | } | |
742 | ||
743 | /** | |
744 | * Stop a session. | |
745 | * | |
746 | * The session is stopped immediately, with all acquisition sessions being | |
747 | * stopped and hardware drivers cleaned up. | |
748 | * | |
749 | * If the session is run in a separate thread, this function will not block | |
750 | * until the session is finished executing. It is the caller's responsibility | |
751 | * to wait for the session thread to return before assuming that the session is | |
752 | * completely decommissioned. | |
753 | * | |
754 | * @param session The session to use. Must not be NULL. | |
755 | * | |
756 | * @retval SR_OK Success. | |
757 | * @retval SR_ERR_ARG Invalid session passed. | |
758 | * | |
759 | * @since 0.4.0 | |
760 | */ | |
761 | SR_API int sr_session_stop(struct sr_session *session) | |
762 | { | |
763 | if (!session) { | |
764 | sr_err("%s: session was NULL", __func__); | |
765 | return SR_ERR_BUG; | |
766 | } | |
767 | ||
768 | g_mutex_lock(&session->stop_mutex); | |
769 | session->abort_session = TRUE; | |
770 | g_mutex_unlock(&session->stop_mutex); | |
771 | ||
772 | return SR_OK; | |
773 | } | |
774 | ||
775 | /** | |
776 | * Debug helper. | |
777 | * | |
778 | * @param packet The packet to show debugging information for. | |
779 | */ | |
780 | static void datafeed_dump(const struct sr_datafeed_packet *packet) | |
781 | { | |
782 | const struct sr_datafeed_logic *logic; | |
783 | const struct sr_datafeed_analog *analog; | |
784 | const struct sr_datafeed_analog2 *analog2; | |
785 | ||
786 | /* Please use the same order as in libsigrok.h. */ | |
787 | switch (packet->type) { | |
788 | case SR_DF_HEADER: | |
789 | sr_dbg("bus: Received SR_DF_HEADER packet."); | |
790 | break; | |
791 | case SR_DF_END: | |
792 | sr_dbg("bus: Received SR_DF_END packet."); | |
793 | break; | |
794 | case SR_DF_META: | |
795 | sr_dbg("bus: Received SR_DF_META packet."); | |
796 | break; | |
797 | case SR_DF_TRIGGER: | |
798 | sr_dbg("bus: Received SR_DF_TRIGGER packet."); | |
799 | break; | |
800 | case SR_DF_LOGIC: | |
801 | logic = packet->payload; | |
802 | sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes, " | |
803 | "unitsize = %d).", logic->length, logic->unitsize); | |
804 | break; | |
805 | case SR_DF_ANALOG: | |
806 | analog = packet->payload; | |
807 | sr_dbg("bus: Received SR_DF_ANALOG packet (%d samples).", | |
808 | analog->num_samples); | |
809 | break; | |
810 | case SR_DF_FRAME_BEGIN: | |
811 | sr_dbg("bus: Received SR_DF_FRAME_BEGIN packet."); | |
812 | break; | |
813 | case SR_DF_FRAME_END: | |
814 | sr_dbg("bus: Received SR_DF_FRAME_END packet."); | |
815 | break; | |
816 | case SR_DF_ANALOG2: | |
817 | analog2 = packet->payload; | |
818 | sr_dbg("bus: Received SR_DF_ANALOG2 packet (%d samples).", | |
819 | analog2->num_samples); | |
820 | break; | |
821 | default: | |
822 | sr_dbg("bus: Received unknown packet type: %d.", packet->type); | |
823 | break; | |
824 | } | |
825 | } | |
826 | ||
827 | /** | |
828 | * Send a packet to whatever is listening on the datafeed bus. | |
829 | * | |
830 | * Hardware drivers use this to send a data packet to the frontend. | |
831 | * | |
832 | * @param sdi TODO. | |
833 | * @param packet The datafeed packet to send to the session bus. | |
834 | * | |
835 | * @retval SR_OK Success. | |
836 | * @retval SR_ERR_ARG Invalid argument. | |
837 | * | |
838 | * @private | |
839 | */ | |
840 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, | |
841 | const struct sr_datafeed_packet *packet) | |
842 | { | |
843 | GSList *l; | |
844 | struct datafeed_callback *cb_struct; | |
845 | struct sr_datafeed_packet *packet_in, *packet_out; | |
846 | struct sr_transform *t; | |
847 | int ret; | |
848 | ||
849 | if (!sdi) { | |
850 | sr_err("%s: sdi was NULL", __func__); | |
851 | return SR_ERR_ARG; | |
852 | } | |
853 | ||
854 | if (!packet) { | |
855 | sr_err("%s: packet was NULL", __func__); | |
856 | return SR_ERR_ARG; | |
857 | } | |
858 | ||
859 | if (!sdi->session) { | |
860 | sr_err("%s: session was NULL", __func__); | |
861 | return SR_ERR_BUG; | |
862 | } | |
863 | ||
864 | /* | |
865 | * Pass the packet to the first transform module. If that returns | |
866 | * another packet (instead of NULL), pass that packet to the next | |
867 | * transform module in the list, and so on. | |
868 | */ | |
869 | packet_in = (struct sr_datafeed_packet *)packet; | |
870 | for (l = sdi->session->transforms; l; l = l->next) { | |
871 | t = l->data; | |
872 | sr_spew("Running transform module '%s'.", t->module->id); | |
873 | ret = t->module->receive(t, packet_in, &packet_out); | |
874 | if (ret < 0) { | |
875 | sr_err("Error while running transform module: %d.", ret); | |
876 | return SR_ERR; | |
877 | } | |
878 | if (!packet_out) { | |
879 | /* | |
880 | * If any of the transforms don't return an output | |
881 | * packet, abort. | |
882 | */ | |
883 | sr_spew("Transform module didn't return a packet, aborting."); | |
884 | return SR_OK; | |
885 | } else { | |
886 | /* | |
887 | * Use this transform module's output packet as input | |
888 | * for the next transform module. | |
889 | */ | |
890 | packet_in = packet_out; | |
891 | } | |
892 | } | |
893 | packet = packet_in; | |
894 | ||
895 | /* | |
896 | * If the last transform did output a packet, pass it to all datafeed | |
897 | * callbacks. | |
898 | */ | |
899 | for (l = sdi->session->datafeed_callbacks; l; l = l->next) { | |
900 | if (sr_log_loglevel_get() >= SR_LOG_DBG) | |
901 | datafeed_dump(packet); | |
902 | cb_struct = l->data; | |
903 | cb_struct->cb(sdi, packet, cb_struct->cb_data); | |
904 | } | |
905 | ||
906 | return SR_OK; | |
907 | } | |
908 | ||
909 | /** | |
910 | * Add an event source for a file descriptor. | |
911 | * | |
912 | * @param session The session to use. Must not be NULL. | |
913 | * @param[in] timeout Max time in ms to wait before the callback is called, | |
914 | * or -1 to wait indefinitely. | |
915 | * @param cb Callback function to add. Must not be NULL. | |
916 | * @param cb_data Data for the callback function. Can be NULL. | |
917 | * @param poll_object Handle by which the source is identified | |
918 | * | |
919 | * @retval SR_OK Success. | |
920 | * @retval SR_ERR_ARG Invalid argument. | |
921 | * @retval SR_ERR An event source for @a poll_object is already installed. | |
922 | */ | |
923 | SR_PRIV int sr_session_source_add_internal(struct sr_session *session, | |
924 | int timeout, sr_receive_data_callback cb, void *cb_data, | |
925 | gintptr poll_object) | |
926 | { | |
927 | struct source src; | |
928 | unsigned int i; | |
929 | ||
930 | /* Note: cb_data can be NULL, that's not a bug. */ | |
931 | if (!cb) { | |
932 | sr_err("%s: cb was NULL", __func__); | |
933 | return SR_ERR_ARG; | |
934 | } | |
935 | /* Make sure that poll_object is unique. | |
936 | */ | |
937 | for (i = 0; i < session->sources->len; ++i) { | |
938 | if (g_array_index(session->sources, struct source, i) | |
939 | .poll_object == poll_object) { | |
940 | sr_err("Event source %" G_GINTPTR_FORMAT | |
941 | " already installed.", poll_object); | |
942 | return SR_ERR; | |
943 | } | |
944 | } | |
945 | sr_dbg("Installing event source %" G_GINTPTR_FORMAT | |
946 | " with %d ms timeout.", poll_object, timeout); | |
947 | src.cb = cb; | |
948 | src.cb_data = cb_data; | |
949 | src.poll_object = poll_object; | |
950 | src.num_fds = 0; | |
951 | src.triggered = FALSE; | |
952 | ||
953 | if (timeout >= 0) { | |
954 | src.timeout = INT64_C(1000) * timeout; | |
955 | src.due = g_get_monotonic_time() + src.timeout; | |
956 | } else { | |
957 | src.timeout = -1; | |
958 | src.due = INT64_MAX; | |
959 | } | |
960 | g_array_append_val(session->sources, src); | |
961 | ||
962 | return SR_OK; | |
963 | } | |
964 | ||
965 | SR_PRIV int sr_session_source_poll_add(struct sr_session *session, | |
966 | gintptr poll_object, gintptr fd, int events) | |
967 | { | |
968 | struct source *source; | |
969 | GPollFD pollfd; | |
970 | unsigned int i; | |
971 | int fd_index, k; | |
972 | ||
973 | source = NULL; | |
974 | fd_index = 0; | |
975 | ||
976 | /* Look up existing event source. | |
977 | */ | |
978 | for (i = 0; i < session->sources->len; ++i) { | |
979 | source = &g_array_index(session->sources, struct source, i); | |
980 | if (source->poll_object == poll_object) | |
981 | break; | |
982 | fd_index += source->num_fds; | |
983 | } | |
984 | if (!source) { | |
985 | sr_err("Cannot add poll FD %" G_GINTPTR_FORMAT | |
986 | " to non-existing event source %" G_GINTPTR_FORMAT | |
987 | ".", fd, poll_object); | |
988 | return SR_ERR; | |
989 | } | |
990 | /* Make sure the FD is unique. | |
991 | */ | |
992 | for (k = 0; k < source->num_fds; ++k) | |
993 | if (g_array_index(session->pollfds, GPollFD, fd_index + k) | |
994 | .fd == fd) { | |
995 | sr_err("Cannot add poll FD %" G_GINTPTR_FORMAT | |
996 | " twice to event source %" G_GINTPTR_FORMAT | |
997 | ".", fd, poll_object); | |
998 | return SR_ERR; | |
999 | } | |
1000 | ||
1001 | pollfd.fd = fd; | |
1002 | pollfd.events = events; | |
1003 | pollfd.revents = 0; | |
1004 | ||
1005 | g_array_insert_val(session->pollfds, | |
1006 | fd_index + source->num_fds, pollfd); | |
1007 | ++source->num_fds; | |
1008 | ||
1009 | sr_dbg("Added poll FD %" G_GINTPTR_FORMAT " with event mask 0x%.2X" | |
1010 | " to event source %" G_GINTPTR_FORMAT ".", | |
1011 | fd, (unsigned)events, poll_object); | |
1012 | ||
1013 | return SR_OK; | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * Add an event source for a file descriptor. | |
1018 | * | |
1019 | * @param session The session to use. Must not be NULL. | |
1020 | * @param fd The file descriptor, or a negative value to create a timer source. | |
1021 | * @param events Events to check for. | |
1022 | * @param timeout Max time in ms to wait before the callback is called, | |
1023 | * or -1 to wait indefinitely. | |
1024 | * @param cb Callback function to add. Must not be NULL. | |
1025 | * @param cb_data Data for the callback function. Can be NULL. | |
1026 | * | |
1027 | * @retval SR_OK Success. | |
1028 | * @retval SR_ERR_ARG Invalid argument. | |
1029 | * | |
1030 | * @since 0.3.0 | |
1031 | */ | |
1032 | SR_API int sr_session_source_add(struct sr_session *session, int fd, | |
1033 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
1034 | { | |
1035 | int ret; | |
1036 | ||
1037 | if (fd < 0 && timeout < 0) { | |
1038 | sr_err("Timer source without timeout would block indefinitely"); | |
1039 | return SR_ERR_ARG; | |
1040 | } | |
1041 | ret = sr_session_source_add_internal(session, timeout, cb, cb_data, fd); | |
1042 | if (ret != SR_OK || fd < 0) | |
1043 | return ret; | |
1044 | ||
1045 | return sr_session_source_poll_add(session, fd, fd, events); | |
1046 | } | |
1047 | ||
1048 | /** | |
1049 | * Add an event source for a GPollFD. | |
1050 | * | |
1051 | * @param session The session to use. Must not be NULL. | |
1052 | * @param pollfd The GPollFD. Must not be NULL. | |
1053 | * @param timeout Max time in ms to wait before the callback is called, | |
1054 | * or -1 to wait indefinitely. | |
1055 | * @param cb Callback function to add. Must not be NULL. | |
1056 | * @param cb_data Data for the callback function. Can be NULL. | |
1057 | * | |
1058 | * @retval SR_OK Success. | |
1059 | * @retval SR_ERR_ARG Invalid argument. | |
1060 | * | |
1061 | * @since 0.3.0 | |
1062 | */ | |
1063 | SR_API int sr_session_source_add_pollfd(struct sr_session *session, | |
1064 | GPollFD *pollfd, int timeout, sr_receive_data_callback cb, | |
1065 | void *cb_data) | |
1066 | { | |
1067 | int ret; | |
1068 | ||
1069 | if (!pollfd) { | |
1070 | sr_err("%s: pollfd was NULL", __func__); | |
1071 | return SR_ERR_ARG; | |
1072 | } | |
1073 | ret = sr_session_source_add_internal(session, | |
1074 | timeout, cb, cb_data, (gintptr)pollfd); | |
1075 | if (ret != SR_OK) | |
1076 | return ret; | |
1077 | ||
1078 | return sr_session_source_poll_add(session, | |
1079 | (gintptr)pollfd, pollfd->fd, pollfd->events); | |
1080 | } | |
1081 | ||
1082 | /** | |
1083 | * Add an event source for a GIOChannel. | |
1084 | * | |
1085 | * @param session The session to use. Must not be NULL. | |
1086 | * @param channel The GIOChannel. | |
1087 | * @param events Events to poll on. | |
1088 | * @param timeout Max time in ms to wait before the callback is called, | |
1089 | * or -1 to wait indefinitely. | |
1090 | * @param cb Callback function to add. Must not be NULL. | |
1091 | * @param cb_data Data for the callback function. Can be NULL. | |
1092 | * | |
1093 | * @retval SR_OK Success. | |
1094 | * @retval SR_ERR_ARG Invalid argument. | |
1095 | * | |
1096 | * @since 0.3.0 | |
1097 | */ | |
1098 | SR_API int sr_session_source_add_channel(struct sr_session *session, | |
1099 | GIOChannel *channel, int events, int timeout, | |
1100 | sr_receive_data_callback cb, void *cb_data) | |
1101 | { | |
1102 | int ret; | |
1103 | ||
1104 | ret = sr_session_source_add_internal(session, | |
1105 | timeout, cb, cb_data, (gintptr)channel); | |
1106 | if (ret != SR_OK) | |
1107 | return ret; | |
1108 | #ifdef G_OS_WIN32 | |
1109 | GPollFD p; | |
1110 | g_io_channel_win32_make_pollfd(channel, events, &p); | |
1111 | ||
1112 | return sr_session_source_poll_add(session, | |
1113 | (gintptr)channel, p.fd, p.events); | |
1114 | #else | |
1115 | return sr_session_source_poll_add(session, (gintptr)channel, | |
1116 | g_io_channel_unix_get_fd(channel), events); | |
1117 | #endif | |
1118 | } | |
1119 | ||
1120 | /** | |
1121 | * Remove the source identified by the specified poll object. | |
1122 | * | |
1123 | * @param session The session to use. Must not be NULL. | |
1124 | * @param poll_object The channel for which the source should be removed. | |
1125 | * | |
1126 | * @retval SR_OK Success | |
1127 | * @retval SR_ERR_BUG No event source for poll_object found. | |
1128 | */ | |
1129 | SR_PRIV int sr_session_source_remove_internal(struct sr_session *session, | |
1130 | gintptr poll_object) | |
1131 | { | |
1132 | struct source *source; | |
1133 | unsigned int i; | |
1134 | int fd_index = 0; | |
1135 | ||
1136 | for (i = 0; i < session->sources->len; ++i) { | |
1137 | source = &g_array_index(session->sources, struct source, i); | |
1138 | ||
1139 | if (source->poll_object == poll_object) { | |
1140 | if (source->num_fds > 0) | |
1141 | g_array_remove_range(session->pollfds, | |
1142 | fd_index, source->num_fds); | |
1143 | g_array_remove_index(session->sources, i); | |
1144 | ||
1145 | sr_dbg("Removed event source %" G_GINTPTR_FORMAT ".", | |
1146 | poll_object); | |
1147 | return SR_OK; | |
1148 | } | |
1149 | fd_index += source->num_fds; | |
1150 | } | |
1151 | /* Trying to remove an already removed event source is problematic | |
1152 | * since the poll_object handle may have been reused in the meantime. | |
1153 | */ | |
1154 | sr_warn("Cannot remove non-existing event source %" | |
1155 | G_GINTPTR_FORMAT ".", poll_object); | |
1156 | ||
1157 | return SR_ERR_BUG; | |
1158 | } | |
1159 | ||
1160 | SR_PRIV int sr_session_source_poll_remove(struct sr_session *session, | |
1161 | gintptr poll_object, gintptr fd) | |
1162 | { | |
1163 | struct source *source; | |
1164 | unsigned int i; | |
1165 | int fd_index, k; | |
1166 | ||
1167 | source = NULL; | |
1168 | fd_index = 0; | |
1169 | ||
1170 | /* Look up existing event source. | |
1171 | */ | |
1172 | for (i = 0; i < session->sources->len; ++i) { | |
1173 | source = &g_array_index(session->sources, struct source, i); | |
1174 | if (source->poll_object == poll_object) | |
1175 | break; | |
1176 | fd_index += source->num_fds; | |
1177 | } | |
1178 | if (!source) { | |
1179 | sr_err("Cannot remove poll FD %" G_GINTPTR_FORMAT | |
1180 | " from non-existing event source %" G_GINTPTR_FORMAT | |
1181 | ".", fd, poll_object); | |
1182 | return SR_ERR; | |
1183 | } | |
1184 | /* Look up the FD in the poll set. | |
1185 | */ | |
1186 | for (k = 0; k < source->num_fds; ++k) | |
1187 | if (g_array_index(session->pollfds, GPollFD, fd_index + k) | |
1188 | .fd == fd) { | |
1189 | ||
1190 | g_array_remove_index(session->pollfds, fd_index + k); | |
1191 | --source->num_fds; | |
1192 | ||
1193 | sr_dbg("Removed poll FD %" G_GINTPTR_FORMAT | |
1194 | " from event source %" G_GINTPTR_FORMAT ".", | |
1195 | fd, poll_object); | |
1196 | return SR_OK; | |
1197 | } | |
1198 | ||
1199 | sr_err("Cannot remove non-existing poll FD %" G_GINTPTR_FORMAT | |
1200 | " from event source %" G_GINTPTR_FORMAT ".", | |
1201 | fd, poll_object); | |
1202 | ||
1203 | return SR_ERR; | |
1204 | } | |
1205 | ||
1206 | /** | |
1207 | * Remove the source belonging to the specified file descriptor. | |
1208 | * | |
1209 | * @param session The session to use. Must not be NULL. | |
1210 | * @param fd The file descriptor for which the source should be removed. | |
1211 | * | |
1212 | * @retval SR_OK Success | |
1213 | * @retval SR_ERR_ARG Invalid argument | |
1214 | * @retval SR_ERR_BUG Internal error. | |
1215 | * | |
1216 | * @since 0.3.0 | |
1217 | */ | |
1218 | SR_API int sr_session_source_remove(struct sr_session *session, int fd) | |
1219 | { | |
1220 | return sr_session_source_remove_internal(session, fd); | |
1221 | } | |
1222 | ||
1223 | /** | |
1224 | * Remove the source belonging to the specified poll descriptor. | |
1225 | * | |
1226 | * @param session The session to use. Must not be NULL. | |
1227 | * @param pollfd The poll descriptor for which the source should be removed. | |
1228 | * Must not be NULL. | |
1229 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
1230 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
1231 | * internal errors. | |
1232 | * | |
1233 | * @since 0.2.0 | |
1234 | */ | |
1235 | SR_API int sr_session_source_remove_pollfd(struct sr_session *session, | |
1236 | GPollFD *pollfd) | |
1237 | { | |
1238 | if (!pollfd) { | |
1239 | sr_err("%s: pollfd was NULL", __func__); | |
1240 | return SR_ERR_ARG; | |
1241 | } | |
1242 | return sr_session_source_remove_internal(session, (gintptr)pollfd); | |
1243 | } | |
1244 | ||
1245 | /** | |
1246 | * Remove the source belonging to the specified channel. | |
1247 | * | |
1248 | * @param session The session to use. Must not be NULL. | |
1249 | * @param channel The channel for which the source should be removed. | |
1250 | * Must not be NULL. | |
1251 | * @retval SR_OK Success. | |
1252 | * @retval SR_ERR_ARG Invalid argument. | |
1253 | * @return SR_ERR_BUG Internal error. | |
1254 | * | |
1255 | * @since 0.2.0 | |
1256 | */ | |
1257 | SR_API int sr_session_source_remove_channel(struct sr_session *session, | |
1258 | GIOChannel *channel) | |
1259 | { | |
1260 | if (!channel) { | |
1261 | sr_err("%s: channel was NULL", __func__); | |
1262 | return SR_ERR_ARG; | |
1263 | } | |
1264 | return sr_session_source_remove_internal(session, (gintptr)channel); | |
1265 | } | |
1266 | ||
1267 | static void copy_src(struct sr_config *src, struct sr_datafeed_meta *meta_copy) | |
1268 | { | |
1269 | g_variant_ref(src->data); | |
1270 | meta_copy->config = g_slist_append(meta_copy->config, | |
1271 | g_memdup(src, sizeof(struct sr_config))); | |
1272 | } | |
1273 | ||
1274 | SR_PRIV int sr_packet_copy(const struct sr_datafeed_packet *packet, | |
1275 | struct sr_datafeed_packet **copy) | |
1276 | { | |
1277 | const struct sr_datafeed_meta *meta; | |
1278 | struct sr_datafeed_meta *meta_copy; | |
1279 | const struct sr_datafeed_logic *logic; | |
1280 | struct sr_datafeed_logic *logic_copy; | |
1281 | const struct sr_datafeed_analog *analog; | |
1282 | struct sr_datafeed_analog *analog_copy; | |
1283 | uint8_t *payload; | |
1284 | ||
1285 | *copy = g_malloc0(sizeof(struct sr_datafeed_packet)); | |
1286 | (*copy)->type = packet->type; | |
1287 | ||
1288 | switch (packet->type) { | |
1289 | case SR_DF_TRIGGER: | |
1290 | case SR_DF_END: | |
1291 | /* No payload. */ | |
1292 | break; | |
1293 | case SR_DF_HEADER: | |
1294 | payload = g_malloc(sizeof(struct sr_datafeed_header)); | |
1295 | memcpy(payload, packet->payload, sizeof(struct sr_datafeed_header)); | |
1296 | (*copy)->payload = payload; | |
1297 | break; | |
1298 | case SR_DF_META: | |
1299 | meta = packet->payload; | |
1300 | meta_copy = g_malloc0(sizeof(struct sr_datafeed_meta)); | |
1301 | g_slist_foreach(meta->config, (GFunc)copy_src, meta_copy->config); | |
1302 | (*copy)->payload = meta_copy; | |
1303 | break; | |
1304 | case SR_DF_LOGIC: | |
1305 | logic = packet->payload; | |
1306 | logic_copy = g_malloc(sizeof(logic)); | |
1307 | logic_copy->length = logic->length; | |
1308 | logic_copy->unitsize = logic->unitsize; | |
1309 | memcpy(logic_copy->data, logic->data, logic->length * logic->unitsize); | |
1310 | (*copy)->payload = logic_copy; | |
1311 | break; | |
1312 | case SR_DF_ANALOG: | |
1313 | analog = packet->payload; | |
1314 | analog_copy = g_malloc(sizeof(analog)); | |
1315 | analog_copy->channels = g_slist_copy(analog->channels); | |
1316 | analog_copy->num_samples = analog->num_samples; | |
1317 | analog_copy->mq = analog->mq; | |
1318 | analog_copy->unit = analog->unit; | |
1319 | analog_copy->mqflags = analog->mqflags; | |
1320 | memcpy(analog_copy->data, analog->data, | |
1321 | analog->num_samples * sizeof(float)); | |
1322 | (*copy)->payload = analog_copy; | |
1323 | break; | |
1324 | default: | |
1325 | sr_err("Unknown packet type %d", packet->type); | |
1326 | return SR_ERR; | |
1327 | } | |
1328 | ||
1329 | return SR_OK; | |
1330 | } | |
1331 | ||
1332 | void sr_packet_free(struct sr_datafeed_packet *packet) | |
1333 | { | |
1334 | const struct sr_datafeed_meta *meta; | |
1335 | const struct sr_datafeed_logic *logic; | |
1336 | const struct sr_datafeed_analog *analog; | |
1337 | struct sr_config *src; | |
1338 | GSList *l; | |
1339 | ||
1340 | switch (packet->type) { | |
1341 | case SR_DF_TRIGGER: | |
1342 | case SR_DF_END: | |
1343 | /* No payload. */ | |
1344 | break; | |
1345 | case SR_DF_HEADER: | |
1346 | /* Payload is a simple struct. */ | |
1347 | g_free((void *)packet->payload); | |
1348 | break; | |
1349 | case SR_DF_META: | |
1350 | meta = packet->payload; | |
1351 | for (l = meta->config; l; l = l->next) { | |
1352 | src = l->data; | |
1353 | g_variant_unref(src->data); | |
1354 | g_free(src); | |
1355 | } | |
1356 | g_slist_free(meta->config); | |
1357 | g_free((void *)packet->payload); | |
1358 | break; | |
1359 | case SR_DF_LOGIC: | |
1360 | logic = packet->payload; | |
1361 | g_free(logic->data); | |
1362 | g_free((void *)packet->payload); | |
1363 | break; | |
1364 | case SR_DF_ANALOG: | |
1365 | analog = packet->payload; | |
1366 | g_slist_free(analog->channels); | |
1367 | g_free(analog->data); | |
1368 | g_free((void *)packet->payload); | |
1369 | break; | |
1370 | default: | |
1371 | sr_err("Unknown packet type %d", packet->type); | |
1372 | } | |
1373 | g_free(packet); | |
1374 | ||
1375 | } | |
1376 | ||
1377 | /** @} */ |