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Commit | Line | Data |
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a1bb33af | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
a1bb33af | 3 | * |
c73d2ea4 | 4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> |
a1bb33af UH |
5 | * |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
32af282c | 20 | #include <errno.h> |
a1bb33af UH |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <unistd.h> | |
24 | #include <string.h> | |
544a4582 | 25 | #include <glib.h> |
c1aae900 | 26 | #include <libsigrok/libsigrok.h> |
45c59c8b | 27 | #include "libsigrok-internal.h" |
aa4b1107 | 28 | |
2ad1deb8 | 29 | /** @cond PRIVATE */ |
3544f848 | 30 | #define LOG_PREFIX "session" |
2ad1deb8 | 31 | /** @endcond */ |
a421dc1d | 32 | |
393fb9cb UH |
33 | /** |
34 | * @file | |
35 | * | |
36 | * Creating, using, or destroying libsigrok sessions. | |
37 | */ | |
38 | ||
7b870c38 UH |
39 | /** |
40 | * @defgroup grp_session Session handling | |
41 | * | |
42 | * Creating, using, or destroying libsigrok sessions. | |
43 | * | |
44 | * @{ | |
45 | */ | |
46 | ||
544a4582 | 47 | struct source { |
faa5d7d9 DE |
48 | int64_t timeout; /* microseconds */ |
49 | int64_t due; /* microseconds */ | |
92248e78 | 50 | |
144f6660 | 51 | sr_receive_data_callback cb; |
1f9813eb | 52 | void *cb_data; |
aac0ea25 LPC |
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; | |
62d7945f | 58 | |
92248e78 DE |
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 | ||
faa5d7d9 | 65 | gboolean triggered; |
544a4582 BV |
66 | }; |
67 | ||
2726474a | 68 | struct datafeed_callback { |
144f6660 | 69 | sr_datafeed_callback cb; |
2726474a ML |
70 | void *cb_data; |
71 | }; | |
72 | ||
9f45fb3a UH |
73 | /** |
74 | * Create a new session. | |
7efe889e | 75 | * |
61e6e2da | 76 | * @param ctx The context in which to create the new session. |
7efe889e UH |
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. | |
9f45fb3a | 80 | * |
0812c40e | 81 | * @retval SR_OK Success. |
41de54ff | 82 | * @retval SR_ERR_ARG Invalid argument. |
47117241 | 83 | * |
0812c40e | 84 | * @since 0.4.0 |
9f45fb3a | 85 | */ |
61e6e2da ML |
86 | SR_API int sr_session_new(struct sr_context *ctx, |
87 | struct sr_session **new_session) | |
a1bb33af | 88 | { |
3337e9a1 | 89 | struct sr_session *session; |
a1bb33af | 90 | |
41de54ff UH |
91 | if (!new_session) |
92 | return SR_ERR_ARG; | |
93 | ||
3337e9a1 | 94 | session = g_malloc0(sizeof(struct sr_session)); |
b7e94111 | 95 | |
4ed5d21d | 96 | session->ctx = ctx; |
faa5d7d9 DE |
97 | |
98 | session->sources = g_array_new(FALSE, FALSE, sizeof(struct source)); | |
99 | session->pollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD)); | |
100 | ||
3337e9a1 | 101 | g_mutex_init(&session->stop_mutex); |
0812c40e | 102 | |
3337e9a1 | 103 | *new_session = session; |
0812c40e ML |
104 | |
105 | return SR_OK; | |
a1bb33af UH |
106 | } |
107 | ||
9f45fb3a | 108 | /** |
0812c40e | 109 | * Destroy a session. |
9f45fb3a UH |
110 | * This frees up all memory used by the session. |
111 | * | |
7efe889e UH |
112 | * @param session The session to destroy. Must not be NULL. |
113 | * | |
04cb9157 | 114 | * @retval SR_OK Success. |
0812c40e | 115 | * @retval SR_ERR_ARG Invalid session passed. |
47117241 | 116 | * |
0812c40e | 117 | * @since 0.4.0 |
9f45fb3a | 118 | */ |
0812c40e | 119 | SR_API int sr_session_destroy(struct sr_session *session) |
a1bb33af | 120 | { |
9f45fb3a | 121 | if (!session) { |
a421dc1d | 122 | sr_err("%s: session was NULL", __func__); |
0812c40e | 123 | return SR_ERR_ARG; |
9f45fb3a UH |
124 | } |
125 | ||
0812c40e | 126 | sr_session_dev_remove_all(session); |
33c6e4c5 | 127 | g_mutex_clear(&session->stop_mutex); |
3d68b612 BV |
128 | if (session->trigger) |
129 | sr_trigger_free(session->trigger); | |
33c6e4c5 | 130 | |
1de3cced ML |
131 | g_slist_free_full(session->owned_devs, (GDestroyNotify)sr_dev_inst_free); |
132 | ||
faa5d7d9 DE |
133 | g_array_unref(session->pollfds); |
134 | g_array_unref(session->sources); | |
135 | ||
a1bb33af | 136 | g_free(session); |
0812c40e | 137 | |
e0508e67 | 138 | return SR_OK; |
a1bb33af UH |
139 | } |
140 | ||
9f45fb3a | 141 | /** |
0812c40e | 142 | * Remove all the devices from a session. |
9f45fb3a UH |
143 | * |
144 | * The session itself (i.e., the struct sr_session) is not free'd and still | |
145 | * exists after this function returns. | |
146 | * | |
7efe889e UH |
147 | * @param session The session to use. Must not be NULL. |
148 | * | |
04cb9157 | 149 | * @retval SR_OK Success. |
0812c40e | 150 | * @retval SR_ERR_BUG Invalid session passed. |
47117241 | 151 | * |
0812c40e | 152 | * @since 0.4.0 |
9f45fb3a | 153 | */ |
0812c40e | 154 | SR_API int sr_session_dev_remove_all(struct sr_session *session) |
a1bb33af | 155 | { |
0812c40e ML |
156 | struct sr_dev_inst *sdi; |
157 | GSList *l; | |
158 | ||
9f45fb3a | 159 | if (!session) { |
a421dc1d | 160 | sr_err("%s: session was NULL", __func__); |
0812c40e ML |
161 | return SR_ERR_ARG; |
162 | } | |
163 | ||
164 | for (l = session->devs; l; l = l->next) { | |
165 | sdi = (struct sr_dev_inst *) l->data; | |
166 | sdi->session = NULL; | |
9f45fb3a UH |
167 | } |
168 | ||
681803df | 169 | g_slist_free(session->devs); |
bb7ef793 | 170 | session->devs = NULL; |
e0508e67 UH |
171 | |
172 | return SR_OK; | |
a1bb33af UH |
173 | } |
174 | ||
9f45fb3a | 175 | /** |
0812c40e | 176 | * Add a device instance to a session. |
9f45fb3a | 177 | * |
7efe889e | 178 | * @param session The session to add to. Must not be NULL. |
0812c40e | 179 | * @param sdi The device instance to add to a session. Must not |
de4d3f99 BV |
180 | * be NULL. Also, sdi->driver and sdi->driver->dev_open must |
181 | * not be NULL. | |
9f45fb3a | 182 | * |
04cb9157 MH |
183 | * @retval SR_OK Success. |
184 | * @retval SR_ERR_ARG Invalid argument. | |
47117241 | 185 | * |
0812c40e | 186 | * @since 0.4.0 |
9f45fb3a | 187 | */ |
0812c40e ML |
188 | SR_API int sr_session_dev_add(struct sr_session *session, |
189 | struct sr_dev_inst *sdi) | |
a1bb33af | 190 | { |
5451816f | 191 | int ret; |
a1bb33af | 192 | |
de4d3f99 | 193 | if (!sdi) { |
a421dc1d | 194 | sr_err("%s: sdi was NULL", __func__); |
9f45fb3a UH |
195 | return SR_ERR_ARG; |
196 | } | |
197 | ||
d6eb0c33 | 198 | if (!session) { |
a421dc1d | 199 | sr_err("%s: session was NULL", __func__); |
0812c40e ML |
200 | return SR_ERR_ARG; |
201 | } | |
202 | ||
203 | /* If sdi->session is not NULL, the device is already in this or | |
204 | * another session. */ | |
205 | if (sdi->session) { | |
206 | sr_err("%s: already assigned to session", __func__); | |
207 | return SR_ERR_ARG; | |
d6eb0c33 UH |
208 | } |
209 | ||
de4d3f99 BV |
210 | /* If sdi->driver is NULL, this is a virtual device. */ |
211 | if (!sdi->driver) { | |
d6eb0c33 | 212 | /* Just add the device, don't run dev_open(). */ |
de4d3f99 | 213 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
0812c40e | 214 | sdi->session = session; |
d6eb0c33 | 215 | return SR_OK; |
9f45fb3a UH |
216 | } |
217 | ||
de4d3f99 BV |
218 | /* sdi->driver is non-NULL (i.e. we have a real device). */ |
219 | if (!sdi->driver->dev_open) { | |
a421dc1d | 220 | sr_err("%s: sdi->driver->dev_open was NULL", __func__); |
8ec95d22 | 221 | return SR_ERR_BUG; |
9f45fb3a UH |
222 | } |
223 | ||
de4d3f99 | 224 | session->devs = g_slist_append(session->devs, (gpointer)sdi); |
0812c40e | 225 | sdi->session = session; |
aa4b1107 | 226 | |
5451816f | 227 | if (session->running) { |
32b7cd4f DE |
228 | /* Adding a device to a running session. Commit settings |
229 | * and start acquisition on that device now. */ | |
230 | if ((ret = sr_config_commit(sdi)) != SR_OK) { | |
231 | sr_err("Failed to commit device settings before " | |
232 | "starting acquisition in running session (%s)", | |
233 | sr_strerror(ret)); | |
234 | return ret; | |
235 | } | |
5451816f | 236 | if ((ret = sdi->driver->dev_acquisition_start(sdi, |
32b7cd4f | 237 | (void *)sdi)) != SR_OK) { |
5451816f | 238 | sr_err("Failed to start acquisition of device in " |
32b7cd4f DE |
239 | "running session (%s)", sr_strerror(ret)); |
240 | return ret; | |
241 | } | |
5451816f BV |
242 | } |
243 | ||
e46b8fb1 | 244 | return SR_OK; |
a1bb33af UH |
245 | } |
246 | ||
2bb311b4 | 247 | /** |
0812c40e | 248 | * List all device instances attached to a session. |
2bb311b4 | 249 | * |
7efe889e | 250 | * @param session The session to use. Must not be NULL. |
2bb311b4 BV |
251 | * @param devlist A pointer where the device instance list will be |
252 | * stored on return. If no devices are in the session, | |
253 | * this will be NULL. Each element in the list points | |
254 | * to a struct sr_dev_inst *. | |
255 | * The list must be freed by the caller, but not the | |
256 | * elements pointed to. | |
257 | * | |
04cb9157 | 258 | * @retval SR_OK Success. |
0812c40e | 259 | * @retval SR_ERR_ARG Invalid argument. |
47117241 | 260 | * |
0812c40e | 261 | * @since 0.4.0 |
2bb311b4 | 262 | */ |
0812c40e | 263 | SR_API int sr_session_dev_list(struct sr_session *session, GSList **devlist) |
2bb311b4 | 264 | { |
2bb311b4 | 265 | if (!session) |
0812c40e ML |
266 | return SR_ERR_ARG; |
267 | ||
268 | if (!devlist) | |
269 | return SR_ERR_ARG; | |
2bb311b4 BV |
270 | |
271 | *devlist = g_slist_copy(session->devs); | |
272 | ||
273 | return SR_OK; | |
274 | } | |
275 | ||
9f45fb3a | 276 | /** |
0812c40e | 277 | * Remove all datafeed callbacks in a session. |
9f45fb3a | 278 | * |
7efe889e UH |
279 | * @param session The session to use. Must not be NULL. |
280 | * | |
04cb9157 | 281 | * @retval SR_OK Success. |
0812c40e | 282 | * @retval SR_ERR_ARG Invalid session passed. |
47117241 | 283 | * |
0812c40e | 284 | * @since 0.4.0 |
9f45fb3a | 285 | */ |
0812c40e | 286 | SR_API int sr_session_datafeed_callback_remove_all(struct sr_session *session) |
a1bb33af | 287 | { |
9f45fb3a | 288 | if (!session) { |
a421dc1d | 289 | sr_err("%s: session was NULL", __func__); |
0812c40e | 290 | return SR_ERR_ARG; |
9f45fb3a UH |
291 | } |
292 | ||
2726474a | 293 | g_slist_free_full(session->datafeed_callbacks, g_free); |
a1bb33af | 294 | session->datafeed_callbacks = NULL; |
e0508e67 UH |
295 | |
296 | return SR_OK; | |
a1bb33af UH |
297 | } |
298 | ||
9f45fb3a | 299 | /** |
0812c40e | 300 | * Add a datafeed callback to a session. |
9f45fb3a | 301 | * |
7efe889e | 302 | * @param session The session to use. Must not be NULL. |
d08490aa | 303 | * @param cb Function to call when a chunk of data is received. |
0abee507 | 304 | * Must not be NULL. |
85222791 | 305 | * @param cb_data Opaque pointer passed in by the caller. |
a1645fcd | 306 | * |
04cb9157 MH |
307 | * @retval SR_OK Success. |
308 | * @retval SR_ERR_BUG No session exists. | |
47117241 UH |
309 | * |
310 | * @since 0.3.0 | |
9f45fb3a | 311 | */ |
0812c40e ML |
312 | SR_API int sr_session_datafeed_callback_add(struct sr_session *session, |
313 | sr_datafeed_callback cb, void *cb_data) | |
a1bb33af | 314 | { |
2726474a ML |
315 | struct datafeed_callback *cb_struct; |
316 | ||
9f45fb3a | 317 | if (!session) { |
a421dc1d | 318 | sr_err("%s: session was NULL", __func__); |
e0508e67 | 319 | return SR_ERR_BUG; |
9f45fb3a UH |
320 | } |
321 | ||
0abee507 | 322 | if (!cb) { |
a421dc1d | 323 | sr_err("%s: cb was NULL", __func__); |
0abee507 UH |
324 | return SR_ERR_ARG; |
325 | } | |
9f45fb3a | 326 | |
91219afc | 327 | cb_struct = g_malloc0(sizeof(struct datafeed_callback)); |
2726474a ML |
328 | cb_struct->cb = cb; |
329 | cb_struct->cb_data = cb_data; | |
330 | ||
62c82025 | 331 | session->datafeed_callbacks = |
2726474a | 332 | g_slist_append(session->datafeed_callbacks, cb_struct); |
e0508e67 UH |
333 | |
334 | return SR_OK; | |
a1bb33af UH |
335 | } |
336 | ||
9f42e2e6 UH |
337 | /** |
338 | * Get the trigger assigned to this session. | |
339 | * | |
340 | * @param session The session to use. | |
341 | * | |
342 | * @retval NULL Invalid (NULL) session was passed to the function. | |
343 | * @retval other The trigger assigned to this session (can be NULL). | |
344 | * | |
345 | * @since 0.4.0 | |
346 | */ | |
0812c40e | 347 | SR_API struct sr_trigger *sr_session_trigger_get(struct sr_session *session) |
7b5e6d29 | 348 | { |
9f42e2e6 UH |
349 | if (!session) |
350 | return NULL; | |
351 | ||
7b5e6d29 BV |
352 | return session->trigger; |
353 | } | |
354 | ||
9f42e2e6 UH |
355 | /** |
356 | * Set the trigger of this session. | |
357 | * | |
358 | * @param session The session to use. Must not be NULL. | |
359 | * @param trig The trigger to assign to this session. Can be NULL. | |
360 | * | |
361 | * @retval SR_OK Success. | |
362 | * @retval SR_ERR_ARG Invalid argument. | |
363 | * | |
364 | * @since 0.4.0 | |
365 | */ | |
0812c40e | 366 | SR_API int sr_session_trigger_set(struct sr_session *session, struct sr_trigger *trig) |
7b5e6d29 | 367 | { |
9f42e2e6 UH |
368 | if (!session) |
369 | return SR_ERR_ARG; | |
370 | ||
7b5e6d29 BV |
371 | session->trigger = trig; |
372 | ||
373 | return SR_OK; | |
374 | } | |
375 | ||
32af282c DE |
376 | static gboolean sr_session_check_aborted(struct sr_session *session) |
377 | { | |
378 | gboolean stop; | |
379 | ||
380 | g_mutex_lock(&session->stop_mutex); | |
381 | stop = session->abort_session; | |
382 | if (stop) { | |
383 | sr_session_stop_sync(session); | |
384 | /* But once is enough. */ | |
385 | session->abort_session = FALSE; | |
386 | } | |
387 | g_mutex_unlock(&session->stop_mutex); | |
388 | ||
389 | return stop; | |
390 | } | |
391 | ||
b483be74 | 392 | /** |
faa5d7d9 | 393 | * Poll the session's event sources. |
b483be74 | 394 | * |
7efe889e | 395 | * @param session The session to use. Must not be NULL. |
04cb9157 | 396 | * @retval SR_OK Success. |
f3f19d11 | 397 | * @retval SR_ERR Error occurred. |
b483be74 | 398 | */ |
62d7945f | 399 | static int sr_session_iteration(struct sr_session *session) |
544a4582 | 400 | { |
faa5d7d9 DE |
401 | int64_t start_time, stop_time, min_due, due; |
402 | int timeout_ms; | |
b7e94111 | 403 | unsigned int i; |
92248e78 | 404 | int k, fd_index; |
faa5d7d9 DE |
405 | int ret; |
406 | int fd; | |
4399cc0f | 407 | int revents; |
faa5d7d9 | 408 | gboolean triggered, stopped; |
4399cc0f DE |
409 | struct source *source; |
410 | GPollFD *pollfd; | |
62d7945f | 411 | gintptr poll_object; |
4b9e2532 | 412 | #if HAVE_LIBUSB_1_0 |
7637fa35 | 413 | int64_t usb_timeout; |
62d7945f | 414 | int64_t usb_due; |
bb5f6110 ML |
415 | struct timeval tv; |
416 | #endif | |
faa5d7d9 | 417 | if (session->sources->len == 0) { |
62d7945f DE |
418 | sr_session_check_aborted(session); |
419 | return SR_OK; | |
420 | } | |
421 | start_time = g_get_monotonic_time(); | |
422 | min_due = INT64_MAX; | |
bb5f6110 | 423 | |
faa5d7d9 DE |
424 | for (i = 0; i < session->sources->len; ++i) { |
425 | source = &g_array_index(session->sources, struct source, i); | |
426 | if (source->due < min_due) | |
427 | min_due = source->due; | |
428 | source->triggered = FALSE; | |
62d7945f | 429 | } |
4b9e2532 | 430 | #if HAVE_LIBUSB_1_0 |
62d7945f | 431 | usb_due = INT64_MAX; |
1190c653 | 432 | if (session->ctx->usb_source_present) { |
1190c653 UH |
433 | ret = libusb_get_next_timeout(session->ctx->libusb_ctx, &tv); |
434 | if (ret < 0) { | |
435 | sr_err("Error getting libusb timeout: %s", | |
436 | libusb_error_name(ret)); | |
437 | return SR_ERR; | |
438 | } else if (ret == 1) { | |
7637fa35 DE |
439 | usb_timeout = (int64_t)tv.tv_sec * G_USEC_PER_SEC |
440 | + tv.tv_usec; | |
441 | usb_due = start_time + usb_timeout; | |
62d7945f DE |
442 | if (usb_due < min_due) |
443 | min_due = usb_due; | |
7637fa35 DE |
444 | |
445 | sr_spew("poll: next USB timeout %g ms", | |
446 | 1e-3 * usb_timeout); | |
1190c653 | 447 | } |
bb5f6110 ML |
448 | } |
449 | #endif | |
faa5d7d9 DE |
450 | if (min_due == INT64_MAX) |
451 | timeout_ms = -1; | |
452 | else if (min_due > start_time) | |
453 | timeout_ms = MIN((min_due - start_time + 999) / 1000, INT_MAX); | |
62d7945f | 454 | else |
faa5d7d9 | 455 | timeout_ms = 0; |
544a4582 | 456 | |
7637fa35 DE |
457 | sr_spew("poll enter: %u sources, %u fds, %d ms timeout", |
458 | session->sources->len, session->pollfds->len, timeout_ms); | |
459 | ||
faa5d7d9 DE |
460 | ret = g_poll((GPollFD *)session->pollfds->data, |
461 | session->pollfds->len, timeout_ms); | |
4399cc0f | 462 | #ifdef G_OS_UNIX |
32af282c DE |
463 | if (ret < 0 && errno != EINTR) { |
464 | sr_err("Error in poll: %s", g_strerror(errno)); | |
465 | return SR_ERR; | |
466 | } | |
4399cc0f DE |
467 | #else |
468 | if (ret < 0) { | |
469 | sr_err("Error in poll: %d", ret); | |
470 | return SR_ERR; | |
471 | } | |
472 | #endif | |
62d7945f | 473 | stop_time = g_get_monotonic_time(); |
b5887bd0 | 474 | |
7637fa35 DE |
475 | sr_spew("poll leave: %g ms elapsed, %d events", |
476 | 1e-3 * (stop_time - start_time), ret); | |
b5887bd0 | 477 | |
faa5d7d9 | 478 | triggered = FALSE; |
32af282c | 479 | stopped = FALSE; |
92248e78 | 480 | fd_index = 0; |
32af282c | 481 | |
faa5d7d9 DE |
482 | for (i = 0; i < session->sources->len; ++i) { |
483 | source = &g_array_index(session->sources, struct source, i); | |
faa5d7d9 DE |
484 | |
485 | poll_object = source->poll_object; | |
486 | fd = (int)poll_object; | |
487 | revents = 0; | |
488 | ||
92248e78 DE |
489 | for (k = 0; k < source->num_fds; ++k) { |
490 | pollfd = &g_array_index(session->pollfds, | |
491 | GPollFD, fd_index + k); | |
faa5d7d9 | 492 | fd = pollfd->fd; |
92248e78 | 493 | revents |= pollfd->revents; |
faa5d7d9 | 494 | } |
92248e78 DE |
495 | fd_index += source->num_fds; |
496 | ||
497 | if (source->triggered) | |
498 | continue; /* already handled */ | |
faa5d7d9 DE |
499 | if (ret > 0 && revents == 0) |
500 | continue; /* skip timeouts if any I/O event occurred */ | |
501 | ||
92248e78 DE |
502 | /* Make invalid to avoid confusion in case of multiple FDs. */ |
503 | if (source->num_fds > 1) | |
504 | fd = -1; | |
505 | if (ret <= 0) | |
506 | revents = 0; | |
507 | ||
62d7945f | 508 | due = source->due; |
4b9e2532 | 509 | #if HAVE_LIBUSB_1_0 |
5a7d8dac | 510 | if (usb_due < due && poll_object |
92248e78 | 511 | == (gintptr)session->ctx->libusb_ctx) |
62d7945f DE |
512 | due = usb_due; |
513 | #endif | |
514 | if (revents == 0 && stop_time < due) | |
515 | continue; | |
516 | /* | |
517 | * The source may be gone after the callback returns, | |
518 | * so access any data now that needs accessing. | |
519 | */ | |
faa5d7d9 DE |
520 | if (source->timeout >= 0) |
521 | source->due = stop_time + source->timeout; | |
522 | source->triggered = TRUE; | |
523 | triggered = TRUE; | |
62d7945f DE |
524 | /* |
525 | * Invoke the source's callback on an event or timeout. | |
526 | */ | |
3a1a6d6b DE |
527 | sr_spew("callback for event source %" G_GINTPTR_FORMAT " with" |
528 | " event mask 0x%.2X", poll_object, (unsigned)revents); | |
534b634c | 529 | if (!source->cb(fd, revents, source->cb_data)) { |
1b8d3a6d | 530 | #if HAVE_LIBUSB_1_0 |
534b634c DE |
531 | /* Hackish, to be cleaned up when porting to |
532 | * the GLib main loop. | |
533 | */ | |
534 | if (poll_object == (gintptr)session->ctx->libusb_ctx) | |
535 | usb_source_remove(session, session->ctx); | |
536 | else | |
1b8d3a6d | 537 | #endif |
534b634c DE |
538 | sr_session_source_remove_internal(session, |
539 | poll_object); | |
540 | } | |
62d7945f DE |
541 | /* |
542 | * We want to take as little time as possible to stop | |
543 | * the session if we have been told to do so. Therefore, | |
544 | * we check the flag after processing every source, not | |
545 | * just once per main event loop. | |
546 | */ | |
faa5d7d9 | 547 | if (!stopped) |
62d7945f | 548 | stopped = sr_session_check_aborted(session); |
faa5d7d9 | 549 | |
62d7945f | 550 | /* Restart loop as the sources list may have changed. */ |
92248e78 | 551 | fd_index = 0; |
62d7945f | 552 | i = 0; |
544a4582 | 553 | } |
faa5d7d9 DE |
554 | |
555 | /* Check for abort at least once per iteration. */ | |
556 | if (!triggered) | |
32af282c | 557 | sr_session_check_aborted(session); |
e0508e67 UH |
558 | |
559 | return SR_OK; | |
544a4582 BV |
560 | } |
561 | ||
7b5e6d29 BV |
562 | static int verify_trigger(struct sr_trigger *trigger) |
563 | { | |
564 | struct sr_trigger_stage *stage; | |
565 | struct sr_trigger_match *match; | |
566 | GSList *l, *m; | |
567 | ||
568 | if (!trigger->stages) { | |
569 | sr_err("No trigger stages defined."); | |
570 | return SR_ERR; | |
571 | } | |
572 | ||
573 | sr_spew("Checking trigger:"); | |
574 | for (l = trigger->stages; l; l = l->next) { | |
575 | stage = l->data; | |
576 | if (!stage->matches) { | |
577 | sr_err("Stage %d has no matches defined.", stage->stage); | |
578 | return SR_ERR; | |
579 | } | |
580 | for (m = stage->matches; m; m = m->next) { | |
581 | match = m->data; | |
582 | if (!match->channel) { | |
583 | sr_err("Stage %d match has no channel.", stage->stage); | |
584 | return SR_ERR; | |
585 | } | |
586 | if (!match->match) { | |
587 | sr_err("Stage %d match is not defined.", stage->stage); | |
588 | return SR_ERR; | |
589 | } | |
590 | sr_spew("Stage %d match on channel %s, match %d", stage->stage, | |
591 | match->channel->name, match->match); | |
592 | } | |
593 | } | |
594 | ||
595 | return SR_OK; | |
596 | } | |
1beccaed | 597 | |
9f45fb3a UH |
598 | /** |
599 | * Start a session. | |
600 | * | |
7efe889e UH |
601 | * @param session The session to use. Must not be NULL. |
602 | * | |
04cb9157 | 603 | * @retval SR_OK Success. |
0812c40e | 604 | * @retval SR_ERR_ARG Invalid session passed. |
47117241 | 605 | * |
0812c40e | 606 | * @since 0.4.0 |
9f45fb3a | 607 | */ |
0812c40e | 608 | SR_API int sr_session_start(struct sr_session *session) |
7d658874 | 609 | { |
de4d3f99 | 610 | struct sr_dev_inst *sdi; |
013ec84b BV |
611 | struct sr_channel *ch; |
612 | GSList *l, *c; | |
613 | int enabled_channels, ret; | |
7d658874 | 614 | |
9f45fb3a | 615 | if (!session) { |
0812c40e ML |
616 | sr_err("%s: session was NULL", __func__); |
617 | return SR_ERR_ARG; | |
9f45fb3a UH |
618 | } |
619 | ||
bb7ef793 | 620 | if (!session->devs) { |
a421dc1d | 621 | sr_err("%s: session->devs was NULL; a session " |
9f45fb3a | 622 | "cannot be started without devices.", __func__); |
0812c40e | 623 | return SR_ERR_ARG; |
9f45fb3a UH |
624 | } |
625 | ||
7b5e6d29 BV |
626 | if (session->trigger && verify_trigger(session->trigger) != SR_OK) |
627 | return SR_ERR; | |
628 | ||
c7142604 | 629 | sr_info("Starting."); |
9f45fb3a | 630 | |
b7c3e849 | 631 | ret = SR_OK; |
bb7ef793 | 632 | for (l = session->devs; l; l = l->next) { |
de4d3f99 | 633 | sdi = l->data; |
013ec84b BV |
634 | enabled_channels = 0; |
635 | for (c = sdi->channels; c; c = c->next) { | |
636 | ch = c->data; | |
637 | if (ch->enabled) { | |
638 | enabled_channels++; | |
639 | break; | |
640 | } | |
641 | } | |
642 | if (enabled_channels == 0) { | |
643 | ret = SR_ERR; | |
1b9e567b SA |
644 | sr_err("%s using connection %s has no enabled channels!", |
645 | sdi->driver->name, sdi->connection_id); | |
013ec84b BV |
646 | break; |
647 | } | |
648 | ||
32b7cd4f DE |
649 | if ((ret = sr_config_commit(sdi)) != SR_OK) { |
650 | sr_err("Failed to commit device settings before " | |
651 | "starting acquisition (%s)", sr_strerror(ret)); | |
652 | break; | |
653 | } | |
de4d3f99 | 654 | if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) { |
a421dc1d | 655 | sr_err("%s: could not start an acquisition " |
568dcacc | 656 | "(%s)", __func__, sr_strerror(ret)); |
7d658874 | 657 | break; |
9f45fb3a | 658 | } |
7d658874 BV |
659 | } |
660 | ||
9f45fb3a UH |
661 | /* TODO: What if there are multiple devices? Which return code? */ |
662 | ||
7d658874 BV |
663 | return ret; |
664 | } | |
665 | ||
9f45fb3a | 666 | /** |
0812c40e | 667 | * Run a session. |
9f45fb3a | 668 | * |
7efe889e UH |
669 | * @param session The session to use. Must not be NULL. |
670 | * | |
04cb9157 | 671 | * @retval SR_OK Success. |
0812c40e | 672 | * @retval SR_ERR_ARG Invalid session passed. |
faa5d7d9 | 673 | * @retval SR_ERR Error during event processing. |
47117241 | 674 | * |
0812c40e | 675 | * @since 0.4.0 |
9f45fb3a | 676 | */ |
0812c40e | 677 | SR_API int sr_session_run(struct sr_session *session) |
7d658874 | 678 | { |
faa5d7d9 DE |
679 | int ret; |
680 | ||
9f45fb3a | 681 | if (!session) { |
0812c40e ML |
682 | sr_err("%s: session was NULL", __func__); |
683 | return SR_ERR_ARG; | |
9f45fb3a UH |
684 | } |
685 | ||
bb7ef793 | 686 | if (!session->devs) { |
9f45fb3a | 687 | /* TODO: Actually the case? */ |
a421dc1d | 688 | sr_err("%s: session->devs was NULL; a session " |
9f45fb3a | 689 | "cannot be run without devices.", __func__); |
0812c40e | 690 | return SR_ERR_ARG; |
9f45fb3a | 691 | } |
5451816f | 692 | session->running = TRUE; |
9f45fb3a | 693 | |
a421dc1d | 694 | sr_info("Running."); |
7d658874 | 695 | |
faa5d7d9 DE |
696 | /* Poll event sources until none are left. */ |
697 | while (session->sources->len > 0) { | |
698 | ret = sr_session_iteration(session); | |
699 | if (ret != SR_OK) | |
700 | return ret; | |
9f45fb3a | 701 | } |
e0508e67 | 702 | return SR_OK; |
7d658874 BV |
703 | } |
704 | ||
9f45fb3a | 705 | /** |
0812c40e | 706 | * Stop a session. |
9f45fb3a | 707 | * |
0812c40e ML |
708 | * The session is stopped immediately, with all acquisition sessions stopped |
709 | * and hardware drivers cleaned up. | |
9f45fb3a | 710 | * |
33c6e4c5 AG |
711 | * This must be called from within the session thread, to prevent freeing |
712 | * resources that the session thread will try to use. | |
713 | * | |
7efe889e UH |
714 | * @param session The session to use. Must not be NULL. |
715 | * | |
04cb9157 | 716 | * @retval SR_OK Success. |
0812c40e | 717 | * @retval SR_ERR_ARG Invalid session passed. |
72a08bcc BV |
718 | * |
719 | * @private | |
9f45fb3a | 720 | */ |
0812c40e | 721 | SR_PRIV int sr_session_stop_sync(struct sr_session *session) |
a1bb33af | 722 | { |
de4d3f99 | 723 | struct sr_dev_inst *sdi; |
a1bb33af UH |
724 | GSList *l; |
725 | ||
9f45fb3a | 726 | if (!session) { |
a421dc1d | 727 | sr_err("%s: session was NULL", __func__); |
0812c40e | 728 | return SR_ERR_ARG; |
9f45fb3a UH |
729 | } |
730 | ||
a421dc1d | 731 | sr_info("Stopping."); |
e0508e67 | 732 | |
bb7ef793 | 733 | for (l = session->devs; l; l = l->next) { |
de4d3f99 BV |
734 | sdi = l->data; |
735 | if (sdi->driver) { | |
736 | if (sdi->driver->dev_acquisition_stop) | |
737 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
8c76be53 | 738 | } |
a1bb33af | 739 | } |
5451816f | 740 | session->running = FALSE; |
9f45fb3a | 741 | |
e0508e67 | 742 | return SR_OK; |
a1bb33af UH |
743 | } |
744 | ||
33c6e4c5 | 745 | /** |
0812c40e | 746 | * Stop a session. |
33c6e4c5 | 747 | * |
0812c40e ML |
748 | * The session is stopped immediately, with all acquisition sessions being |
749 | * stopped and hardware drivers cleaned up. | |
33c6e4c5 AG |
750 | * |
751 | * If the session is run in a separate thread, this function will not block | |
752 | * until the session is finished executing. It is the caller's responsibility | |
753 | * to wait for the session thread to return before assuming that the session is | |
754 | * completely decommissioned. | |
755 | * | |
7efe889e UH |
756 | * @param session The session to use. Must not be NULL. |
757 | * | |
04cb9157 | 758 | * @retval SR_OK Success. |
0812c40e | 759 | * @retval SR_ERR_ARG Invalid session passed. |
47117241 | 760 | * |
0812c40e | 761 | * @since 0.4.0 |
33c6e4c5 | 762 | */ |
0812c40e | 763 | SR_API int sr_session_stop(struct sr_session *session) |
33c6e4c5 AG |
764 | { |
765 | if (!session) { | |
766 | sr_err("%s: session was NULL", __func__); | |
767 | return SR_ERR_BUG; | |
768 | } | |
769 | ||
770 | g_mutex_lock(&session->stop_mutex); | |
771 | session->abort_session = TRUE; | |
772 | g_mutex_unlock(&session->stop_mutex); | |
773 | ||
774 | return SR_OK; | |
775 | } | |
776 | ||
9f45fb3a | 777 | /** |
a1645fcd | 778 | * Debug helper. |
9f45fb3a | 779 | * |
996b0c72 | 780 | * @param packet The packet to show debugging information for. |
9f45fb3a | 781 | */ |
bf53457d | 782 | static void datafeed_dump(const struct sr_datafeed_packet *packet) |
7d2afd6c | 783 | { |
bf53457d JH |
784 | const struct sr_datafeed_logic *logic; |
785 | const struct sr_datafeed_analog *analog; | |
1954dfa9 | 786 | const struct sr_datafeed_analog2 *analog2; |
7d2afd6c | 787 | |
ca7dbb56 | 788 | /* Please use the same order as in libsigrok.h. */ |
7d2afd6c BV |
789 | switch (packet->type) { |
790 | case SR_DF_HEADER: | |
a421dc1d | 791 | sr_dbg("bus: Received SR_DF_HEADER packet."); |
7d2afd6c | 792 | break; |
55c9f09d UH |
793 | case SR_DF_END: |
794 | sr_dbg("bus: Received SR_DF_END packet."); | |
7d2afd6c | 795 | break; |
c71bac3b | 796 | case SR_DF_META: |
a421dc1d | 797 | sr_dbg("bus: Received SR_DF_META packet."); |
ee7489d2 | 798 | break; |
55c9f09d UH |
799 | case SR_DF_TRIGGER: |
800 | sr_dbg("bus: Received SR_DF_TRIGGER packet."); | |
801 | break; | |
7d2afd6c BV |
802 | case SR_DF_LOGIC: |
803 | logic = packet->payload; | |
7ea45862 UH |
804 | sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes, " |
805 | "unitsize = %d).", logic->length, logic->unitsize); | |
7d2afd6c | 806 | break; |
ee7489d2 BV |
807 | case SR_DF_ANALOG: |
808 | analog = packet->payload; | |
a421dc1d UH |
809 | sr_dbg("bus: Received SR_DF_ANALOG packet (%d samples).", |
810 | analog->num_samples); | |
ee7489d2 | 811 | break; |
6ea7669c | 812 | case SR_DF_FRAME_BEGIN: |
a421dc1d | 813 | sr_dbg("bus: Received SR_DF_FRAME_BEGIN packet."); |
6ea7669c BV |
814 | break; |
815 | case SR_DF_FRAME_END: | |
a421dc1d | 816 | sr_dbg("bus: Received SR_DF_FRAME_END packet."); |
6ea7669c | 817 | break; |
55c9f09d UH |
818 | case SR_DF_ANALOG2: |
819 | analog2 = packet->payload; | |
820 | sr_dbg("bus: Received SR_DF_ANALOG2 packet (%d samples).", | |
821 | analog2->num_samples); | |
822 | break; | |
7d2afd6c | 823 | default: |
a421dc1d | 824 | sr_dbg("bus: Received unknown packet type: %d.", packet->type); |
9f45fb3a | 825 | break; |
7d2afd6c | 826 | } |
7d2afd6c BV |
827 | } |
828 | ||
9f45fb3a | 829 | /** |
a1645fcd BV |
830 | * Send a packet to whatever is listening on the datafeed bus. |
831 | * | |
832 | * Hardware drivers use this to send a data packet to the frontend. | |
9f45fb3a | 833 | * |
6b2d8d3e | 834 | * @param sdi TODO. |
31ccebc4 | 835 | * @param packet The datafeed packet to send to the session bus. |
44dae539 | 836 | * |
04cb9157 MH |
837 | * @retval SR_OK Success. |
838 | * @retval SR_ERR_ARG Invalid argument. | |
b4bd7088 UH |
839 | * |
840 | * @private | |
9f45fb3a | 841 | */ |
de4d3f99 | 842 | SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi, |
8143cfdc | 843 | const struct sr_datafeed_packet *packet) |
a1bb33af UH |
844 | { |
845 | GSList *l; | |
2726474a | 846 | struct datafeed_callback *cb_struct; |
c0a1e532 UH |
847 | struct sr_datafeed_packet *packet_in, *packet_out; |
848 | struct sr_transform *t; | |
849 | int ret; | |
a1bb33af | 850 | |
de4d3f99 | 851 | if (!sdi) { |
a421dc1d | 852 | sr_err("%s: sdi was NULL", __func__); |
e0508e67 | 853 | return SR_ERR_ARG; |
9f45fb3a UH |
854 | } |
855 | ||
e0508e67 | 856 | if (!packet) { |
a421dc1d | 857 | sr_err("%s: packet was NULL", __func__); |
e0508e67 | 858 | return SR_ERR_ARG; |
9f45fb3a UH |
859 | } |
860 | ||
79f92686 BV |
861 | if (!sdi->session) { |
862 | sr_err("%s: session was NULL", __func__); | |
863 | return SR_ERR_BUG; | |
864 | } | |
865 | ||
c0a1e532 UH |
866 | /* |
867 | * Pass the packet to the first transform module. If that returns | |
868 | * another packet (instead of NULL), pass that packet to the next | |
869 | * transform module in the list, and so on. | |
870 | */ | |
871 | packet_in = (struct sr_datafeed_packet *)packet; | |
872 | for (l = sdi->session->transforms; l; l = l->next) { | |
873 | t = l->data; | |
874 | sr_spew("Running transform module '%s'.", t->module->id); | |
875 | ret = t->module->receive(t, packet_in, &packet_out); | |
876 | if (ret < 0) { | |
877 | sr_err("Error while running transform module: %d.", ret); | |
878 | return SR_ERR; | |
879 | } | |
880 | if (!packet_out) { | |
881 | /* | |
882 | * If any of the transforms don't return an output | |
883 | * packet, abort. | |
884 | */ | |
885 | sr_spew("Transform module didn't return a packet, aborting."); | |
886 | return SR_OK; | |
887 | } else { | |
888 | /* | |
889 | * Use this transform module's output packet as input | |
890 | * for the next transform module. | |
891 | */ | |
892 | packet_in = packet_out; | |
893 | } | |
894 | } | |
4ec436c4 | 895 | packet = packet_in; |
c0a1e532 UH |
896 | |
897 | /* | |
898 | * If the last transform did output a packet, pass it to all datafeed | |
899 | * callbacks. | |
900 | */ | |
3337e9a1 | 901 | for (l = sdi->session->datafeed_callbacks; l; l = l->next) { |
18beaeff BV |
902 | if (sr_log_loglevel_get() >= SR_LOG_DBG) |
903 | datafeed_dump(packet); | |
2726474a ML |
904 | cb_struct = l->data; |
905 | cb_struct->cb(sdi, packet, cb_struct->cb_data); | |
a1bb33af | 906 | } |
9f45fb3a | 907 | |
e0508e67 | 908 | return SR_OK; |
a1bb33af UH |
909 | } |
910 | ||
6b2d8d3e UH |
911 | /** |
912 | * Add an event source for a file descriptor. | |
913 | * | |
7efe889e | 914 | * @param session The session to use. Must not be NULL. |
faa5d7d9 DE |
915 | * @param[in] timeout Max time in ms to wait before the callback is called, |
916 | * or -1 to wait indefinitely. | |
6b2d8d3e UH |
917 | * @param cb Callback function to add. Must not be NULL. |
918 | * @param cb_data Data for the callback function. Can be NULL. | |
62d7945f | 919 | * @param poll_object Handle by which the source is identified |
6b2d8d3e | 920 | * |
04cb9157 MH |
921 | * @retval SR_OK Success. |
922 | * @retval SR_ERR_ARG Invalid argument. | |
92248e78 | 923 | * @retval SR_ERR An event source for @a poll_object is already installed. |
6b2d8d3e | 924 | */ |
62d7945f | 925 | SR_PRIV int sr_session_source_add_internal(struct sr_session *session, |
534b634c | 926 | int timeout, sr_receive_data_callback cb, void *cb_data, |
92248e78 | 927 | gintptr poll_object) |
544a4582 | 928 | { |
faa5d7d9 | 929 | struct source src; |
92248e78 | 930 | unsigned int i; |
544a4582 | 931 | |
92248e78 | 932 | /* Note: cb_data can be NULL, that's not a bug. */ |
d08490aa | 933 | if (!cb) { |
a421dc1d | 934 | sr_err("%s: cb was NULL", __func__); |
e0508e67 | 935 | return SR_ERR_ARG; |
9f45fb3a | 936 | } |
92248e78 DE |
937 | /* Make sure that poll_object is unique. |
938 | */ | |
939 | for (i = 0; i < session->sources->len; ++i) { | |
940 | if (g_array_index(session->sources, struct source, i) | |
941 | .poll_object == poll_object) { | |
3a1a6d6b | 942 | sr_err("Event source %" G_GINTPTR_FORMAT |
92248e78 DE |
943 | " already installed.", poll_object); |
944 | return SR_ERR; | |
945 | } | |
946 | } | |
534b634c DE |
947 | sr_dbg("Installing event source %" G_GINTPTR_FORMAT |
948 | " with %d ms timeout.", poll_object, timeout); | |
faa5d7d9 DE |
949 | src.cb = cb; |
950 | src.cb_data = cb_data; | |
951 | src.poll_object = poll_object; | |
534b634c | 952 | src.num_fds = 0; |
faa5d7d9 | 953 | src.triggered = FALSE; |
544a4582 | 954 | |
faa5d7d9 DE |
955 | if (timeout >= 0) { |
956 | src.timeout = INT64_C(1000) * timeout; | |
957 | src.due = g_get_monotonic_time() + src.timeout; | |
958 | } else { | |
959 | src.timeout = -1; | |
960 | src.due = INT64_MAX; | |
961 | } | |
92248e78 | 962 | g_array_append_val(session->sources, src); |
faa5d7d9 | 963 | |
534b634c DE |
964 | return SR_OK; |
965 | } | |
966 | ||
967 | SR_PRIV int sr_session_source_poll_add(struct sr_session *session, | |
968 | gintptr poll_object, gintptr fd, int events) | |
969 | { | |
970 | struct source *source; | |
971 | GPollFD pollfd; | |
972 | unsigned int i; | |
973 | int fd_index, k; | |
974 | ||
975 | source = NULL; | |
976 | fd_index = 0; | |
977 | ||
978 | /* Look up existing event source. | |
979 | */ | |
980 | for (i = 0; i < session->sources->len; ++i) { | |
981 | source = &g_array_index(session->sources, struct source, i); | |
982 | if (source->poll_object == poll_object) | |
983 | break; | |
984 | fd_index += source->num_fds; | |
985 | } | |
986 | if (!source) { | |
987 | sr_err("Cannot add poll FD %" G_GINTPTR_FORMAT | |
988 | " to non-existing event source %" G_GINTPTR_FORMAT | |
989 | ".", fd, poll_object); | |
990 | return SR_ERR; | |
3a1a6d6b | 991 | } |
534b634c DE |
992 | /* Make sure the FD is unique. |
993 | */ | |
994 | for (k = 0; k < source->num_fds; ++k) | |
995 | if (g_array_index(session->pollfds, GPollFD, fd_index + k) | |
996 | .fd == fd) { | |
997 | sr_err("Cannot add poll FD %" G_GINTPTR_FORMAT | |
998 | " twice to event source %" G_GINTPTR_FORMAT | |
999 | ".", fd, poll_object); | |
1000 | return SR_ERR; | |
1001 | } | |
1002 | ||
1003 | pollfd.fd = fd; | |
1004 | pollfd.events = events; | |
1005 | pollfd.revents = 0; | |
1006 | ||
1007 | g_array_insert_val(session->pollfds, | |
1008 | fd_index + source->num_fds, pollfd); | |
1009 | ++source->num_fds; | |
1010 | ||
1011 | sr_dbg("Added poll FD %" G_GINTPTR_FORMAT " with event mask 0x%.2X" | |
1012 | " to event source %" G_GINTPTR_FORMAT ".", | |
1013 | fd, (unsigned)events, poll_object); | |
544a4582 | 1014 | |
e0508e67 | 1015 | return SR_OK; |
544a4582 BV |
1016 | } |
1017 | ||
9f45fb3a | 1018 | /** |
6b2d8d3e | 1019 | * Add an event source for a file descriptor. |
9f45fb3a | 1020 | * |
7efe889e | 1021 | * @param session The session to use. Must not be NULL. |
534b634c | 1022 | * @param fd The file descriptor, or a negative value to create a timer source. |
aac0ea25 | 1023 | * @param events Events to check for. |
faa5d7d9 DE |
1024 | * @param timeout Max time in ms to wait before the callback is called, |
1025 | * or -1 to wait indefinitely. | |
aac0ea25 LPC |
1026 | * @param cb Callback function to add. Must not be NULL. |
1027 | * @param cb_data Data for the callback function. Can be NULL. | |
9f45fb3a | 1028 | * |
04cb9157 MH |
1029 | * @retval SR_OK Success. |
1030 | * @retval SR_ERR_ARG Invalid argument. | |
47117241 UH |
1031 | * |
1032 | * @since 0.3.0 | |
aac0ea25 | 1033 | */ |
0812c40e ML |
1034 | SR_API int sr_session_source_add(struct sr_session *session, int fd, |
1035 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
aac0ea25 | 1036 | { |
534b634c | 1037 | int ret; |
aac0ea25 | 1038 | |
faa5d7d9 DE |
1039 | if (fd < 0 && timeout < 0) { |
1040 | sr_err("Timer source without timeout would block indefinitely"); | |
1041 | return SR_ERR_ARG; | |
1042 | } | |
534b634c DE |
1043 | ret = sr_session_source_add_internal(session, timeout, cb, cb_data, fd); |
1044 | if (ret != SR_OK || fd < 0) | |
1045 | return ret; | |
aac0ea25 | 1046 | |
534b634c | 1047 | return sr_session_source_poll_add(session, fd, fd, events); |
aac0ea25 LPC |
1048 | } |
1049 | ||
1050 | /** | |
1a895c61 | 1051 | * Add an event source for a GPollFD. |
aac0ea25 | 1052 | * |
7efe889e | 1053 | * @param session The session to use. Must not be NULL. |
faa5d7d9 DE |
1054 | * @param pollfd The GPollFD. Must not be NULL. |
1055 | * @param timeout Max time in ms to wait before the callback is called, | |
1056 | * or -1 to wait indefinitely. | |
aac0ea25 LPC |
1057 | * @param cb Callback function to add. Must not be NULL. |
1058 | * @param cb_data Data for the callback function. Can be NULL. | |
44dae539 | 1059 | * |
04cb9157 MH |
1060 | * @retval SR_OK Success. |
1061 | * @retval SR_ERR_ARG Invalid argument. | |
47117241 UH |
1062 | * |
1063 | * @since 0.3.0 | |
9f45fb3a | 1064 | */ |
0812c40e ML |
1065 | SR_API int sr_session_source_add_pollfd(struct sr_session *session, |
1066 | GPollFD *pollfd, int timeout, sr_receive_data_callback cb, | |
1067 | void *cb_data) | |
aac0ea25 | 1068 | { |
534b634c DE |
1069 | int ret; |
1070 | ||
faa5d7d9 DE |
1071 | if (!pollfd) { |
1072 | sr_err("%s: pollfd was NULL", __func__); | |
1073 | return SR_ERR_ARG; | |
1074 | } | |
534b634c | 1075 | ret = sr_session_source_add_internal(session, |
92248e78 | 1076 | timeout, cb, cb_data, (gintptr)pollfd); |
534b634c DE |
1077 | if (ret != SR_OK) |
1078 | return ret; | |
1079 | ||
1080 | return sr_session_source_poll_add(session, | |
1081 | (gintptr)pollfd, pollfd->fd, pollfd->events); | |
aac0ea25 LPC |
1082 | } |
1083 | ||
1084 | /** | |
1a895c61 | 1085 | * Add an event source for a GIOChannel. |
aac0ea25 | 1086 | * |
7efe889e | 1087 | * @param session The session to use. Must not be NULL. |
aac0ea25 LPC |
1088 | * @param channel The GIOChannel. |
1089 | * @param events Events to poll on. | |
faa5d7d9 DE |
1090 | * @param timeout Max time in ms to wait before the callback is called, |
1091 | * or -1 to wait indefinitely. | |
aac0ea25 LPC |
1092 | * @param cb Callback function to add. Must not be NULL. |
1093 | * @param cb_data Data for the callback function. Can be NULL. | |
1094 | * | |
04cb9157 MH |
1095 | * @retval SR_OK Success. |
1096 | * @retval SR_ERR_ARG Invalid argument. | |
47117241 UH |
1097 | * |
1098 | * @since 0.3.0 | |
aac0ea25 | 1099 | */ |
0812c40e ML |
1100 | SR_API int sr_session_source_add_channel(struct sr_session *session, |
1101 | GIOChannel *channel, int events, int timeout, | |
1102 | sr_receive_data_callback cb, void *cb_data) | |
aac0ea25 | 1103 | { |
534b634c | 1104 | int ret; |
aac0ea25 | 1105 | |
534b634c DE |
1106 | ret = sr_session_source_add_internal(session, |
1107 | timeout, cb, cb_data, (gintptr)channel); | |
1108 | if (ret != SR_OK) | |
1109 | return ret; | |
faa5d7d9 | 1110 | #ifdef G_OS_WIN32 |
534b634c | 1111 | GPollFD p; |
6b2d8d3e | 1112 | g_io_channel_win32_make_pollfd(channel, events, &p); |
534b634c DE |
1113 | |
1114 | return sr_session_source_poll_add(session, | |
1115 | (gintptr)channel, p.fd, p.events); | |
aac0ea25 | 1116 | #else |
534b634c DE |
1117 | return sr_session_source_poll_add(session, (gintptr)channel, |
1118 | g_io_channel_unix_get_fd(channel), events); | |
aac0ea25 | 1119 | #endif |
aac0ea25 LPC |
1120 | } |
1121 | ||
6b2d8d3e | 1122 | /** |
92248e78 | 1123 | * Remove the source identified by the specified poll object. |
6b2d8d3e | 1124 | * |
7efe889e | 1125 | * @param session The session to use. Must not be NULL. |
04cb9157 | 1126 | * @param poll_object The channel for which the source should be removed. |
6b2d8d3e | 1127 | * |
04cb9157 | 1128 | * @retval SR_OK Success |
92248e78 | 1129 | * @retval SR_ERR_BUG No event source for poll_object found. |
6b2d8d3e | 1130 | */ |
92248e78 DE |
1131 | SR_PRIV int sr_session_source_remove_internal(struct sr_session *session, |
1132 | gintptr poll_object) | |
544a4582 | 1133 | { |
92248e78 | 1134 | struct source *source; |
faa5d7d9 | 1135 | unsigned int i; |
92248e78 | 1136 | int fd_index = 0; |
544a4582 | 1137 | |
faa5d7d9 | 1138 | for (i = 0; i < session->sources->len; ++i) { |
92248e78 | 1139 | source = &g_array_index(session->sources, struct source, i); |
e0508e67 | 1140 | |
92248e78 DE |
1141 | if (source->poll_object == poll_object) { |
1142 | if (source->num_fds > 0) | |
1143 | g_array_remove_range(session->pollfds, | |
1144 | fd_index, source->num_fds); | |
faa5d7d9 | 1145 | g_array_remove_index(session->sources, i); |
3a1a6d6b DE |
1146 | |
1147 | sr_dbg("Removed event source %" G_GINTPTR_FORMAT ".", | |
1148 | poll_object); | |
92248e78 | 1149 | return SR_OK; |
faa5d7d9 | 1150 | } |
92248e78 | 1151 | fd_index += source->num_fds; |
9f45fb3a | 1152 | } |
92248e78 DE |
1153 | /* Trying to remove an already removed event source is problematic |
1154 | * since the poll_object handle may have been reused in the meantime. | |
1155 | */ | |
3a1a6d6b | 1156 | sr_warn("Cannot remove non-existing event source %" |
92248e78 DE |
1157 | G_GINTPTR_FORMAT ".", poll_object); |
1158 | ||
1159 | return SR_ERR_BUG; | |
544a4582 | 1160 | } |
aac0ea25 | 1161 | |
534b634c DE |
1162 | SR_PRIV int sr_session_source_poll_remove(struct sr_session *session, |
1163 | gintptr poll_object, gintptr fd) | |
1164 | { | |
1165 | struct source *source; | |
1166 | unsigned int i; | |
1167 | int fd_index, k; | |
1168 | ||
1169 | source = NULL; | |
1170 | fd_index = 0; | |
1171 | ||
1172 | /* Look up existing event source. | |
1173 | */ | |
1174 | for (i = 0; i < session->sources->len; ++i) { | |
1175 | source = &g_array_index(session->sources, struct source, i); | |
1176 | if (source->poll_object == poll_object) | |
1177 | break; | |
1178 | fd_index += source->num_fds; | |
1179 | } | |
1180 | if (!source) { | |
1181 | sr_err("Cannot remove poll FD %" G_GINTPTR_FORMAT | |
1182 | " from non-existing event source %" G_GINTPTR_FORMAT | |
1183 | ".", fd, poll_object); | |
1184 | return SR_ERR; | |
1185 | } | |
1186 | /* Look up the FD in the poll set. | |
1187 | */ | |
1188 | for (k = 0; k < source->num_fds; ++k) | |
1189 | if (g_array_index(session->pollfds, GPollFD, fd_index + k) | |
1190 | .fd == fd) { | |
1191 | ||
1192 | g_array_remove_index(session->pollfds, fd_index + k); | |
1193 | --source->num_fds; | |
1194 | ||
1195 | sr_dbg("Removed poll FD %" G_GINTPTR_FORMAT | |
1196 | " from event source %" G_GINTPTR_FORMAT ".", | |
1197 | fd, poll_object); | |
1198 | return SR_OK; | |
1199 | } | |
1200 | ||
1201 | sr_err("Cannot remove non-existing poll FD %" G_GINTPTR_FORMAT | |
1202 | " from event source %" G_GINTPTR_FORMAT ".", | |
1203 | fd, poll_object); | |
1204 | ||
1205 | return SR_ERR; | |
1206 | } | |
1207 | ||
6b2d8d3e | 1208 | /** |
aac0ea25 LPC |
1209 | * Remove the source belonging to the specified file descriptor. |
1210 | * | |
7efe889e | 1211 | * @param session The session to use. Must not be NULL. |
1a895c61 | 1212 | * @param fd The file descriptor for which the source should be removed. |
aac0ea25 | 1213 | * |
04cb9157 MH |
1214 | * @retval SR_OK Success |
1215 | * @retval SR_ERR_ARG Invalid argument | |
04cb9157 | 1216 | * @retval SR_ERR_BUG Internal error. |
47117241 UH |
1217 | * |
1218 | * @since 0.3.0 | |
aac0ea25 | 1219 | */ |
0812c40e | 1220 | SR_API int sr_session_source_remove(struct sr_session *session, int fd) |
aac0ea25 | 1221 | { |
92248e78 | 1222 | return sr_session_source_remove_internal(session, fd); |
aac0ea25 LPC |
1223 | } |
1224 | ||
1225 | /** | |
1226 | * Remove the source belonging to the specified poll descriptor. | |
1227 | * | |
7efe889e | 1228 | * @param session The session to use. Must not be NULL. |
aac0ea25 | 1229 | * @param pollfd The poll descriptor for which the source should be removed. |
faa5d7d9 | 1230 | * Must not be NULL. |
aac0ea25 LPC |
1231 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or |
1232 | * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon | |
1233 | * internal errors. | |
47117241 UH |
1234 | * |
1235 | * @since 0.2.0 | |
aac0ea25 | 1236 | */ |
0812c40e ML |
1237 | SR_API int sr_session_source_remove_pollfd(struct sr_session *session, |
1238 | GPollFD *pollfd) | |
aac0ea25 | 1239 | { |
faa5d7d9 DE |
1240 | if (!pollfd) { |
1241 | sr_err("%s: pollfd was NULL", __func__); | |
1242 | return SR_ERR_ARG; | |
1243 | } | |
92248e78 | 1244 | return sr_session_source_remove_internal(session, (gintptr)pollfd); |
aac0ea25 LPC |
1245 | } |
1246 | ||
6b2d8d3e | 1247 | /** |
aac0ea25 LPC |
1248 | * Remove the source belonging to the specified channel. |
1249 | * | |
7efe889e | 1250 | * @param session The session to use. Must not be NULL. |
1a895c61 | 1251 | * @param channel The channel for which the source should be removed. |
faa5d7d9 | 1252 | * Must not be NULL. |
04cb9157 MH |
1253 | * @retval SR_OK Success. |
1254 | * @retval SR_ERR_ARG Invalid argument. | |
04cb9157 | 1255 | * @return SR_ERR_BUG Internal error. |
47117241 UH |
1256 | * |
1257 | * @since 0.2.0 | |
aac0ea25 | 1258 | */ |
0812c40e ML |
1259 | SR_API int sr_session_source_remove_channel(struct sr_session *session, |
1260 | GIOChannel *channel) | |
aac0ea25 | 1261 | { |
faa5d7d9 DE |
1262 | if (!channel) { |
1263 | sr_err("%s: channel was NULL", __func__); | |
1264 | return SR_ERR_ARG; | |
1265 | } | |
92248e78 | 1266 | return sr_session_source_remove_internal(session, (gintptr)channel); |
aac0ea25 | 1267 | } |
7b870c38 | 1268 | |
ee29d92e | 1269 | static void copy_src(struct sr_config *src, struct sr_datafeed_meta *meta_copy) |
8143cfdc | 1270 | { |
8143cfdc | 1271 | g_variant_ref(src->data); |
ee29d92e AJ |
1272 | meta_copy->config = g_slist_append(meta_copy->config, |
1273 | g_memdup(src, sizeof(struct sr_config))); | |
8143cfdc BV |
1274 | } |
1275 | ||
1276 | SR_PRIV int sr_packet_copy(const struct sr_datafeed_packet *packet, | |
1277 | struct sr_datafeed_packet **copy) | |
1278 | { | |
1279 | const struct sr_datafeed_meta *meta; | |
1280 | struct sr_datafeed_meta *meta_copy; | |
1281 | const struct sr_datafeed_logic *logic; | |
1282 | struct sr_datafeed_logic *logic_copy; | |
1283 | const struct sr_datafeed_analog *analog; | |
1284 | struct sr_datafeed_analog *analog_copy; | |
1285 | uint8_t *payload; | |
1286 | ||
1287 | *copy = g_malloc0(sizeof(struct sr_datafeed_packet)); | |
1288 | (*copy)->type = packet->type; | |
1289 | ||
1290 | switch (packet->type) { | |
1291 | case SR_DF_TRIGGER: | |
1292 | case SR_DF_END: | |
1293 | /* No payload. */ | |
1294 | break; | |
1295 | case SR_DF_HEADER: | |
1296 | payload = g_malloc(sizeof(struct sr_datafeed_header)); | |
1297 | memcpy(payload, packet->payload, sizeof(struct sr_datafeed_header)); | |
1298 | (*copy)->payload = payload; | |
1299 | break; | |
1300 | case SR_DF_META: | |
1301 | meta = packet->payload; | |
ee29d92e AJ |
1302 | meta_copy = g_malloc0(sizeof(struct sr_datafeed_meta)); |
1303 | g_slist_foreach(meta->config, (GFunc)copy_src, meta_copy->config); | |
8143cfdc BV |
1304 | (*copy)->payload = meta_copy; |
1305 | break; | |
1306 | case SR_DF_LOGIC: | |
1307 | logic = packet->payload; | |
1308 | logic_copy = g_malloc(sizeof(logic)); | |
1309 | logic_copy->length = logic->length; | |
1310 | logic_copy->unitsize = logic->unitsize; | |
1311 | memcpy(logic_copy->data, logic->data, logic->length * logic->unitsize); | |
1312 | (*copy)->payload = logic_copy; | |
1313 | break; | |
1314 | case SR_DF_ANALOG: | |
1315 | analog = packet->payload; | |
1316 | analog_copy = g_malloc(sizeof(analog)); | |
1317 | analog_copy->channels = g_slist_copy(analog->channels); | |
1318 | analog_copy->num_samples = analog->num_samples; | |
1319 | analog_copy->mq = analog->mq; | |
1320 | analog_copy->unit = analog->unit; | |
1321 | analog_copy->mqflags = analog->mqflags; | |
1322 | memcpy(analog_copy->data, analog->data, | |
1323 | analog->num_samples * sizeof(float)); | |
1324 | (*copy)->payload = analog_copy; | |
1325 | break; | |
1326 | default: | |
1327 | sr_err("Unknown packet type %d", packet->type); | |
1328 | return SR_ERR; | |
1329 | } | |
1330 | ||
1331 | return SR_OK; | |
1332 | } | |
1333 | ||
1334 | void sr_packet_free(struct sr_datafeed_packet *packet) | |
1335 | { | |
1336 | const struct sr_datafeed_meta *meta; | |
1337 | const struct sr_datafeed_logic *logic; | |
1338 | const struct sr_datafeed_analog *analog; | |
1339 | struct sr_config *src; | |
1340 | GSList *l; | |
1341 | ||
1342 | switch (packet->type) { | |
1343 | case SR_DF_TRIGGER: | |
1344 | case SR_DF_END: | |
1345 | /* No payload. */ | |
1346 | break; | |
1347 | case SR_DF_HEADER: | |
1348 | /* Payload is a simple struct. */ | |
1349 | g_free((void *)packet->payload); | |
1350 | break; | |
1351 | case SR_DF_META: | |
1352 | meta = packet->payload; | |
1353 | for (l = meta->config; l; l = l->next) { | |
1354 | src = l->data; | |
1355 | g_variant_unref(src->data); | |
1356 | g_free(src); | |
1357 | } | |
1358 | g_slist_free(meta->config); | |
1359 | g_free((void *)packet->payload); | |
1360 | break; | |
1361 | case SR_DF_LOGIC: | |
1362 | logic = packet->payload; | |
1363 | g_free(logic->data); | |
1364 | g_free((void *)packet->payload); | |
1365 | break; | |
1366 | case SR_DF_ANALOG: | |
1367 | analog = packet->payload; | |
1368 | g_slist_free(analog->channels); | |
1369 | g_free(analog->data); | |
1370 | g_free((void *)packet->payload); | |
1371 | break; | |
1372 | default: | |
1373 | sr_err("Unknown packet type %d", packet->type); | |
1374 | } | |
1375 | g_free(packet); | |
1376 | ||
1377 | } | |
1378 | ||
7b870c38 | 1379 | /** @} */ |