Commit | Line | Data |
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47e5a032 JG |
1 | /* |
2 | * iterator.c | |
3 | * | |
4 | * Babeltrace Notification Iterator | |
5 | * | |
6 | * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3230ee6b | 7 | * Copyright 2017 Philippe Proulx <pproulx@efficios.com> |
47e5a032 JG |
8 | * |
9 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
10 | * of this software and associated documentation files (the "Software"), to deal | |
11 | * in the Software without restriction, including without limitation the rights | |
12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
13 | * copies of the Software, and to permit persons to whom the Software is | |
14 | * furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
25 | * SOFTWARE. | |
26 | */ | |
27 | ||
3d9990ac | 28 | #include <babeltrace/compiler-internal.h> |
b8a06801 | 29 | #include <babeltrace/ref.h> |
3230ee6b PP |
30 | #include <babeltrace/ctf-ir/event-internal.h> |
31 | #include <babeltrace/ctf-ir/packet-internal.h> | |
32 | #include <babeltrace/ctf-ir/stream-internal.h> | |
b2e0c907 PP |
33 | #include <babeltrace/graph/component.h> |
34 | #include <babeltrace/graph/component-source-internal.h> | |
35 | #include <babeltrace/graph/component-class-internal.h> | |
36 | #include <babeltrace/graph/notification-iterator.h> | |
37 | #include <babeltrace/graph/notification-iterator-internal.h> | |
e7fa96c3 | 38 | #include <babeltrace/graph/notification-internal.h> |
3230ee6b PP |
39 | #include <babeltrace/graph/notification-event.h> |
40 | #include <babeltrace/graph/notification-event-internal.h> | |
41 | #include <babeltrace/graph/notification-packet.h> | |
42 | #include <babeltrace/graph/notification-packet-internal.h> | |
43 | #include <babeltrace/graph/notification-stream.h> | |
44 | #include <babeltrace/graph/notification-stream-internal.h> | |
45 | #include <babeltrace/graph/port.h> | |
46 | ||
47 | struct stream_state { | |
48 | struct bt_ctf_stream *stream; /* owned by this */ | |
49 | struct bt_ctf_packet *cur_packet; /* owned by this */ | |
50 | bool is_ended; | |
51 | }; | |
52 | ||
53 | enum action_type { | |
54 | ACTION_TYPE_PUSH_NOTIF, | |
55 | ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM, | |
56 | ACTION_TYPE_ADD_STREAM_STATE, | |
57 | ACTION_TYPE_SET_STREAM_STATE_IS_ENDED, | |
58 | ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET, | |
59 | }; | |
60 | ||
61 | struct action { | |
62 | enum action_type type; | |
63 | union { | |
64 | /* ACTION_TYPE_PUSH_NOTIF */ | |
65 | struct { | |
66 | struct bt_notification *notif; /* owned by this */ | |
67 | } push_notif; | |
68 | ||
69 | /* ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM */ | |
70 | struct { | |
71 | struct bt_ctf_stream *stream; /* owned by this */ | |
72 | struct bt_component *component; /* owned by this */ | |
73 | struct bt_port *port; /* owned by this */ | |
74 | } map_port_to_comp_in_stream; | |
75 | ||
76 | /* ACTION_TYPE_ADD_STREAM_STATE */ | |
77 | struct { | |
78 | struct bt_ctf_stream *stream; /* owned by this */ | |
79 | struct stream_state *stream_state; /* owned by this */ | |
80 | } add_stream_state; | |
81 | ||
82 | /* ACTION_TYPE_SET_STREAM_STATE_IS_ENDED */ | |
83 | struct { | |
84 | struct stream_state *stream_state; /* weak */ | |
85 | } set_stream_state_is_ended; | |
86 | ||
87 | /* ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET */ | |
88 | struct { | |
89 | struct stream_state *stream_state; /* weak */ | |
90 | struct bt_ctf_packet *packet; /* owned by this */ | |
91 | } set_stream_state_cur_packet; | |
92 | } payload; | |
93 | }; | |
94 | ||
95 | static | |
96 | void stream_destroy_listener(struct bt_ctf_stream *stream, void *data) | |
97 | { | |
98 | struct bt_notification_iterator *iterator = data; | |
99 | ||
100 | /* Remove associated stream state */ | |
101 | g_hash_table_remove(iterator->stream_states, stream); | |
102 | } | |
103 | ||
104 | static | |
105 | void destroy_stream_state(struct stream_state *stream_state) | |
106 | { | |
107 | if (!stream_state) { | |
108 | return; | |
109 | } | |
110 | ||
111 | bt_put(stream_state->cur_packet); | |
112 | bt_put(stream_state->stream); | |
113 | g_free(stream_state); | |
114 | } | |
115 | ||
116 | static | |
117 | void destroy_action(struct action *action) | |
118 | { | |
119 | assert(action); | |
120 | ||
121 | switch (action->type) { | |
122 | case ACTION_TYPE_PUSH_NOTIF: | |
123 | BT_PUT(action->payload.push_notif.notif); | |
124 | break; | |
125 | case ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM: | |
126 | BT_PUT(action->payload.map_port_to_comp_in_stream.stream); | |
127 | BT_PUT(action->payload.map_port_to_comp_in_stream.component); | |
128 | BT_PUT(action->payload.map_port_to_comp_in_stream.port); | |
129 | break; | |
130 | case ACTION_TYPE_ADD_STREAM_STATE: | |
131 | BT_PUT(action->payload.add_stream_state.stream); | |
132 | destroy_stream_state( | |
133 | action->payload.add_stream_state.stream_state); | |
134 | action->payload.add_stream_state.stream_state = NULL; | |
135 | break; | |
136 | case ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET: | |
137 | BT_PUT(action->payload.set_stream_state_cur_packet.packet); | |
138 | break; | |
139 | case ACTION_TYPE_SET_STREAM_STATE_IS_ENDED: | |
140 | break; | |
141 | default: | |
142 | assert(false); | |
143 | } | |
144 | } | |
145 | ||
146 | static | |
147 | void add_action(struct bt_notification_iterator *iterator, | |
148 | struct action *action) | |
149 | { | |
150 | g_array_append_val(iterator->actions, *action); | |
151 | } | |
152 | ||
153 | static | |
154 | void clear_actions(struct bt_notification_iterator *iterator) | |
155 | { | |
156 | size_t i; | |
157 | ||
158 | for (i = 0; i < iterator->actions->len; i++) { | |
159 | struct action *action = &g_array_index(iterator->actions, | |
160 | struct action, i); | |
161 | ||
162 | destroy_action(action); | |
163 | } | |
164 | ||
165 | g_array_set_size(iterator->actions, 0); | |
166 | } | |
167 | ||
168 | static | |
169 | void apply_actions(struct bt_notification_iterator *iterator) | |
170 | { | |
171 | size_t i; | |
172 | ||
173 | for (i = 0; i < iterator->actions->len; i++) { | |
174 | struct action *action = &g_array_index(iterator->actions, | |
175 | struct action, i); | |
176 | ||
177 | switch (action->type) { | |
178 | case ACTION_TYPE_PUSH_NOTIF: | |
179 | /* Move notification to queue */ | |
180 | g_queue_push_head(iterator->queue, | |
181 | action->payload.push_notif.notif); | |
182 | bt_notification_freeze( | |
183 | action->payload.push_notif.notif); | |
184 | action->payload.push_notif.notif = NULL; | |
185 | break; | |
186 | case ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM: | |
187 | bt_ctf_stream_map_component_to_port( | |
188 | action->payload.map_port_to_comp_in_stream.stream, | |
189 | action->payload.map_port_to_comp_in_stream.component, | |
190 | action->payload.map_port_to_comp_in_stream.port); | |
191 | break; | |
192 | case ACTION_TYPE_ADD_STREAM_STATE: | |
193 | /* Move stream state to hash table */ | |
194 | g_hash_table_insert(iterator->stream_states, | |
195 | action->payload.add_stream_state.stream, | |
196 | action->payload.add_stream_state.stream_state); | |
197 | ||
198 | action->payload.add_stream_state.stream_state = NULL; | |
199 | break; | |
200 | case ACTION_TYPE_SET_STREAM_STATE_IS_ENDED: | |
201 | /* | |
202 | * We know that this stream is ended. We need to | |
203 | * remember this as long as the stream exists to | |
204 | * enforce that the same stream does not end | |
205 | * twice. | |
206 | * | |
207 | * Here we add a destroy listener to the stream | |
208 | * which we put after (becomes weak as the hash | |
209 | * table key). If we were the last object to own | |
210 | * this stream, the destroy listener is called | |
211 | * when we call bt_put() which removes this | |
212 | * stream state completely. This is important | |
213 | * because the memory used by this stream object | |
214 | * could be reused for another stream, and they | |
215 | * must have different states. | |
216 | */ | |
217 | bt_ctf_stream_add_destroy_listener( | |
218 | action->payload.set_stream_state_is_ended.stream_state->stream, | |
219 | stream_destroy_listener, iterator); | |
220 | action->payload.set_stream_state_is_ended.stream_state->is_ended = true; | |
221 | BT_PUT(action->payload.set_stream_state_is_ended.stream_state->stream); | |
222 | break; | |
223 | case ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET: | |
224 | /* Move packet to stream state's current packet */ | |
225 | BT_MOVE(action->payload.set_stream_state_cur_packet.stream_state->cur_packet, | |
226 | action->payload.set_stream_state_cur_packet.packet); | |
227 | break; | |
228 | default: | |
229 | assert(false); | |
230 | } | |
231 | } | |
232 | ||
233 | clear_actions(iterator); | |
234 | } | |
235 | ||
236 | static | |
237 | struct stream_state *create_stream_state(struct bt_ctf_stream *stream) | |
238 | { | |
239 | struct stream_state *stream_state = g_new0(struct stream_state, 1); | |
240 | ||
241 | if (!stream_state) { | |
242 | goto end; | |
243 | } | |
244 | ||
245 | /* | |
246 | * We keep a reference to the stream until we know it's ended | |
247 | * because we need to be able to create an automatic "stream | |
248 | * end" notification when the user's "next" method returns | |
249 | * BT_NOTIFICATION_ITERATOR_STATUS_END. | |
250 | * | |
251 | * We put this reference when the stream is marked as ended. | |
252 | */ | |
253 | stream_state->stream = bt_get(stream); | |
254 | ||
255 | end: | |
256 | return stream_state; | |
257 | } | |
47e5a032 JG |
258 | |
259 | static | |
b8a06801 | 260 | void bt_notification_iterator_destroy(struct bt_object *obj) |
47e5a032 | 261 | { |
8738a040 | 262 | struct bt_notification_iterator *iterator; |
d3eb6e8f | 263 | struct bt_component_class *comp_class; |
8738a040 | 264 | |
b8a06801 JG |
265 | assert(obj); |
266 | iterator = container_of(obj, struct bt_notification_iterator, | |
267 | base); | |
3230ee6b PP |
268 | assert(iterator->upstream_component); |
269 | comp_class = iterator->upstream_component->class; | |
d3eb6e8f PP |
270 | |
271 | /* Call user-defined destroy method */ | |
272 | switch (comp_class->type) { | |
273 | case BT_COMPONENT_CLASS_TYPE_SOURCE: | |
274 | { | |
275 | struct bt_component_class_source *source_class; | |
276 | ||
277 | source_class = container_of(comp_class, struct bt_component_class_source, parent); | |
278 | ||
64cadc66 PP |
279 | if (source_class->methods.iterator.finalize) { |
280 | source_class->methods.iterator.finalize( | |
890882ef | 281 | bt_private_notification_iterator_from_notification_iterator(iterator)); |
d3eb6e8f PP |
282 | } |
283 | break; | |
512ccb99 | 284 | } |
d3eb6e8f PP |
285 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
286 | { | |
287 | struct bt_component_class_filter *filter_class; | |
288 | ||
289 | filter_class = container_of(comp_class, struct bt_component_class_filter, parent); | |
290 | ||
64cadc66 PP |
291 | if (filter_class->methods.iterator.finalize) { |
292 | filter_class->methods.iterator.finalize( | |
890882ef | 293 | bt_private_notification_iterator_from_notification_iterator(iterator)); |
d3eb6e8f PP |
294 | } |
295 | break; | |
296 | } | |
297 | default: | |
298 | /* Unreachable */ | |
299 | assert(0); | |
300 | } | |
301 | ||
3230ee6b PP |
302 | if (iterator->queue) { |
303 | struct bt_notification *notif; | |
304 | ||
305 | while ((notif = g_queue_pop_tail(iterator->queue))) { | |
306 | bt_put(notif); | |
307 | } | |
308 | ||
309 | g_queue_free(iterator->queue); | |
310 | } | |
311 | ||
312 | if (iterator->stream_states) { | |
313 | /* | |
314 | * Remove our destroy listener from each stream which | |
315 | * has a state in this iterator. Otherwise the destroy | |
316 | * listener would be called with an invalid/other | |
317 | * notification iterator object. | |
318 | */ | |
319 | GHashTableIter ht_iter; | |
320 | gpointer stream_gptr, stream_state_gptr; | |
321 | ||
322 | g_hash_table_iter_init(&ht_iter, iterator->stream_states); | |
323 | ||
324 | while (g_hash_table_iter_next(&ht_iter, &stream_gptr, &stream_state_gptr)) { | |
325 | assert(stream_gptr); | |
326 | bt_ctf_stream_remove_destroy_listener( | |
327 | (void *) stream_gptr, stream_destroy_listener, | |
328 | iterator); | |
329 | } | |
330 | ||
331 | g_hash_table_destroy(iterator->stream_states); | |
332 | } | |
333 | ||
334 | if (iterator->actions) { | |
335 | g_array_free(iterator->actions, TRUE); | |
336 | } | |
337 | ||
338 | bt_put(iterator->current_notification); | |
339 | bt_put(iterator->upstream_component); | |
340 | bt_put(iterator->upstream_port); | |
8738a040 | 341 | g_free(iterator); |
47e5a032 JG |
342 | } |
343 | ||
344 | BT_HIDDEN | |
345 | struct bt_notification_iterator *bt_notification_iterator_create( | |
3230ee6b PP |
346 | struct bt_component *upstream_comp, |
347 | struct bt_port *upstream_port) | |
47e5a032 | 348 | { |
d3e4dcd8 | 349 | enum bt_component_class_type type; |
47e5a032 JG |
350 | struct bt_notification_iterator *iterator = NULL; |
351 | ||
3230ee6b PP |
352 | assert(upstream_comp); |
353 | assert(upstream_port); | |
354 | assert(bt_port_is_connected(upstream_port)); | |
16b7b023 | 355 | |
3230ee6b | 356 | type = bt_component_get_class_type(upstream_comp); |
16b7b023 | 357 | switch (type) { |
d3e4dcd8 PP |
358 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
359 | case BT_COMPONENT_CLASS_TYPE_FILTER: | |
16b7b023 JG |
360 | break; |
361 | default: | |
3230ee6b | 362 | goto error; |
47e5a032 JG |
363 | } |
364 | ||
365 | iterator = g_new0(struct bt_notification_iterator, 1); | |
366 | if (!iterator) { | |
3230ee6b | 367 | goto error; |
47e5a032 JG |
368 | } |
369 | ||
b8a06801 | 370 | bt_object_init(iterator, bt_notification_iterator_destroy); |
3230ee6b PP |
371 | |
372 | iterator->stream_states = g_hash_table_new_full(g_direct_hash, | |
373 | g_direct_equal, NULL, (GDestroyNotify) destroy_stream_state); | |
374 | if (!iterator->stream_states) { | |
375 | goto error; | |
376 | } | |
377 | ||
378 | iterator->queue = g_queue_new(); | |
379 | if (!iterator->queue) { | |
380 | goto error; | |
381 | } | |
382 | ||
383 | iterator->actions = g_array_new(FALSE, FALSE, sizeof(struct action)); | |
384 | if (!iterator->actions) { | |
385 | goto error; | |
386 | } | |
387 | ||
388 | iterator->upstream_component = bt_get(upstream_comp); | |
389 | iterator->upstream_port = bt_get(upstream_port); | |
390 | goto end; | |
391 | ||
392 | error: | |
393 | BT_PUT(iterator); | |
394 | ||
47e5a032 JG |
395 | end: |
396 | return iterator; | |
397 | } | |
398 | ||
399 | BT_HIDDEN | |
400 | enum bt_notification_iterator_status bt_notification_iterator_validate( | |
401 | struct bt_notification_iterator *iterator) | |
402 | { | |
8738a040 | 403 | enum bt_notification_iterator_status ret = |
ea8d3e58 | 404 | BT_NOTIFICATION_ITERATOR_STATUS_OK; |
47e5a032 | 405 | |
d3eb6e8f | 406 | if (!iterator) { |
fe8ad2b6 | 407 | ret = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
ea8d3e58 JG |
408 | goto end; |
409 | } | |
ea8d3e58 JG |
410 | end: |
411 | return ret; | |
412 | } | |
413 | ||
890882ef PP |
414 | void *bt_private_notification_iterator_get_user_data( |
415 | struct bt_private_notification_iterator *private_iterator) | |
ea8d3e58 | 416 | { |
890882ef PP |
417 | struct bt_notification_iterator *iterator = |
418 | bt_notification_iterator_from_private(private_iterator); | |
419 | ||
ea8d3e58 JG |
420 | return iterator ? iterator->user_data : NULL; |
421 | } | |
422 | ||
423 | enum bt_notification_iterator_status | |
890882ef PP |
424 | bt_private_notification_iterator_set_user_data( |
425 | struct bt_private_notification_iterator *private_iterator, | |
426 | void *data) | |
ea8d3e58 JG |
427 | { |
428 | enum bt_notification_iterator_status ret = | |
429 | BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
890882ef PP |
430 | struct bt_notification_iterator *iterator = |
431 | bt_notification_iterator_from_private(private_iterator); | |
ea8d3e58 | 432 | |
d3eb6e8f | 433 | if (!iterator) { |
fe8ad2b6 | 434 | ret = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
ea8d3e58 JG |
435 | goto end; |
436 | } | |
437 | ||
438 | iterator->user_data = data; | |
8738a040 JG |
439 | end: |
440 | return ret; | |
441 | } | |
413bc2c4 | 442 | |
53d45b87 JG |
443 | struct bt_notification *bt_notification_iterator_get_notification( |
444 | struct bt_notification_iterator *iterator) | |
445 | { | |
41a2b7ae | 446 | struct bt_notification *notification = NULL; |
d3eb6e8f | 447 | |
41a2b7ae PP |
448 | if (!iterator) { |
449 | goto end; | |
d3eb6e8f | 450 | } |
d3eb6e8f | 451 | |
41a2b7ae | 452 | notification = bt_get(iterator->current_notification); |
d3eb6e8f | 453 | |
41a2b7ae PP |
454 | end: |
455 | return notification; | |
53d45b87 JG |
456 | } |
457 | ||
3230ee6b PP |
458 | static |
459 | bool validate_notification(struct bt_notification_iterator *iterator, | |
460 | struct bt_notification *notif, | |
461 | struct bt_ctf_stream *notif_stream, | |
462 | struct bt_ctf_packet *notif_packet) | |
463 | { | |
464 | bool is_valid = true; | |
465 | struct stream_state *stream_state; | |
466 | struct bt_port *stream_comp_cur_port; | |
467 | ||
468 | assert(notif_stream); | |
469 | stream_comp_cur_port = | |
470 | bt_ctf_stream_port_for_component(notif_stream, | |
471 | iterator->upstream_component); | |
472 | if (!stream_comp_cur_port) { | |
473 | /* | |
474 | * This is the first time this notification iterator | |
475 | * bumps into this stream. Add an action to map the | |
476 | * iterator's upstream component to the iterator's | |
477 | * upstream port in this stream. | |
478 | */ | |
479 | struct action action = { | |
480 | .type = ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM, | |
481 | .payload.map_port_to_comp_in_stream = { | |
482 | .stream = bt_get(notif_stream), | |
483 | .component = bt_get(iterator->upstream_component), | |
484 | .port = bt_get(iterator->upstream_port), | |
485 | }, | |
486 | }; | |
487 | ||
488 | add_action(iterator, &action); | |
489 | } else { | |
490 | if (stream_comp_cur_port != iterator->upstream_port) { | |
491 | /* | |
492 | * It looks like two different ports of the same | |
493 | * component are emitting notifications which | |
494 | * have references to the same stream. This is | |
495 | * bad: the API guarantees that it can never | |
496 | * happen. | |
497 | */ | |
498 | is_valid = false; | |
499 | goto end; | |
500 | } | |
501 | ||
502 | } | |
503 | ||
504 | stream_state = g_hash_table_lookup(iterator->stream_states, | |
505 | notif_stream); | |
506 | if (stream_state) { | |
507 | if (stream_state->is_ended) { | |
508 | /* | |
509 | * There's a new notification which has a | |
510 | * reference to a stream which, from this | |
511 | * iterator's point of view, is ended ("end of | |
512 | * stream" notification was returned). This is | |
513 | * bad: the API guarantees that it can never | |
514 | * happen. | |
515 | */ | |
516 | is_valid = false; | |
517 | goto end; | |
518 | } | |
519 | ||
520 | switch (notif->type) { | |
521 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: | |
522 | /* | |
523 | * We already have a stream state, which means | |
524 | * we already returned a "stream begin" | |
525 | * notification: this is an invalid duplicate. | |
526 | */ | |
527 | is_valid = false; | |
528 | goto end; | |
529 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: | |
530 | if (notif_packet == stream_state->cur_packet) { | |
531 | /* Duplicate "packet begin" notification */ | |
532 | is_valid = false; | |
533 | goto end; | |
534 | } | |
535 | break; | |
536 | default: | |
537 | break; | |
538 | } | |
539 | } | |
540 | ||
541 | end: | |
542 | return is_valid; | |
543 | } | |
544 | ||
545 | static | |
546 | void add_action_push_notif(struct bt_notification_iterator *iterator, | |
547 | struct bt_notification *notif) | |
548 | { | |
549 | struct action action = { | |
550 | .type = ACTION_TYPE_PUSH_NOTIF, | |
551 | .payload.push_notif = { | |
552 | .notif = bt_get(notif), | |
553 | }, | |
554 | }; | |
555 | ||
556 | assert(notif); | |
557 | add_action(iterator, &action); | |
558 | } | |
559 | ||
560 | static | |
561 | int add_action_push_notif_stream_begin( | |
562 | struct bt_notification_iterator *iterator, | |
563 | struct bt_ctf_stream *stream) | |
564 | { | |
565 | int ret = 0; | |
566 | struct bt_notification *stream_begin_notif = NULL; | |
567 | ||
568 | assert(stream); | |
569 | stream_begin_notif = bt_notification_stream_begin_create(stream); | |
570 | if (!stream_begin_notif) { | |
571 | goto error; | |
572 | } | |
573 | ||
574 | add_action_push_notif(iterator, stream_begin_notif); | |
575 | goto end; | |
576 | ||
577 | error: | |
578 | ret = -1; | |
579 | ||
580 | end: | |
581 | bt_put(stream_begin_notif); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | static | |
586 | int add_action_push_notif_stream_end( | |
587 | struct bt_notification_iterator *iterator, | |
588 | struct bt_ctf_stream *stream) | |
589 | { | |
590 | int ret = 0; | |
591 | struct bt_notification *stream_end_notif = NULL; | |
592 | ||
593 | assert(stream); | |
594 | stream_end_notif = bt_notification_stream_end_create(stream); | |
595 | if (!stream_end_notif) { | |
596 | goto error; | |
597 | } | |
598 | ||
599 | add_action_push_notif(iterator, stream_end_notif); | |
600 | goto end; | |
601 | ||
602 | error: | |
603 | ret = -1; | |
604 | ||
605 | end: | |
606 | bt_put(stream_end_notif); | |
607 | return ret; | |
608 | } | |
609 | ||
610 | static | |
611 | int add_action_push_notif_packet_begin( | |
612 | struct bt_notification_iterator *iterator, | |
613 | struct bt_ctf_packet *packet) | |
614 | { | |
615 | int ret = 0; | |
616 | struct bt_notification *packet_begin_notif = NULL; | |
617 | ||
618 | assert(packet); | |
619 | packet_begin_notif = bt_notification_packet_begin_create(packet); | |
620 | if (!packet_begin_notif) { | |
621 | goto error; | |
622 | } | |
623 | ||
624 | add_action_push_notif(iterator, packet_begin_notif); | |
625 | goto end; | |
626 | ||
627 | error: | |
628 | ret = -1; | |
629 | ||
630 | end: | |
631 | bt_put(packet_begin_notif); | |
632 | return ret; | |
633 | } | |
634 | ||
635 | static | |
636 | int add_action_push_notif_packet_end( | |
637 | struct bt_notification_iterator *iterator, | |
638 | struct bt_ctf_packet *packet) | |
639 | { | |
640 | int ret = 0; | |
641 | struct bt_notification *packet_end_notif = NULL; | |
642 | ||
643 | assert(packet); | |
644 | packet_end_notif = bt_notification_packet_end_create(packet); | |
645 | if (!packet_end_notif) { | |
646 | goto error; | |
647 | } | |
648 | ||
649 | add_action_push_notif(iterator, packet_end_notif); | |
650 | goto end; | |
651 | ||
652 | error: | |
653 | ret = -1; | |
654 | ||
655 | end: | |
656 | bt_put(packet_end_notif); | |
657 | return ret; | |
658 | } | |
659 | ||
660 | static | |
661 | void add_action_set_stream_state_is_ended( | |
662 | struct bt_notification_iterator *iterator, | |
663 | struct stream_state *stream_state) | |
664 | { | |
665 | struct action action = { | |
666 | .type = ACTION_TYPE_SET_STREAM_STATE_IS_ENDED, | |
667 | .payload.set_stream_state_is_ended = { | |
668 | .stream_state = stream_state, | |
669 | }, | |
670 | }; | |
671 | ||
672 | assert(stream_state); | |
673 | add_action(iterator, &action); | |
674 | } | |
675 | ||
676 | static | |
677 | void add_action_set_stream_state_cur_packet( | |
678 | struct bt_notification_iterator *iterator, | |
679 | struct stream_state *stream_state, | |
680 | struct bt_ctf_packet *packet) | |
681 | { | |
682 | struct action action = { | |
683 | .type = ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET, | |
684 | .payload.set_stream_state_cur_packet = { | |
685 | .stream_state = stream_state, | |
686 | .packet = bt_get(packet), | |
687 | }, | |
688 | }; | |
689 | ||
690 | assert(stream_state); | |
691 | add_action(iterator, &action); | |
692 | } | |
693 | ||
694 | static | |
695 | int ensure_stream_state_exists(struct bt_notification_iterator *iterator, | |
696 | struct bt_notification *stream_begin_notif, | |
697 | struct bt_ctf_stream *notif_stream, | |
698 | struct stream_state **stream_state) | |
699 | { | |
700 | int ret = 0; | |
701 | ||
702 | if (!notif_stream) { | |
703 | /* | |
704 | * The notification does not reference any stream: no | |
705 | * need to get or create a stream state. | |
706 | */ | |
707 | goto end; | |
708 | } | |
709 | ||
710 | *stream_state = g_hash_table_lookup(iterator->stream_states, | |
711 | notif_stream); | |
712 | if (!*stream_state) { | |
713 | /* | |
714 | * This iterator did not bump into this stream yet: | |
715 | * create a stream state and a "stream begin" | |
716 | * notification. | |
717 | */ | |
718 | struct action action = { | |
719 | .type = ACTION_TYPE_ADD_STREAM_STATE, | |
720 | .payload.add_stream_state = { | |
721 | .stream = bt_get(notif_stream), | |
722 | .stream_state = NULL, | |
723 | }, | |
724 | }; | |
725 | ||
726 | *stream_state = create_stream_state(notif_stream); | |
727 | if (!stream_state) { | |
728 | goto error; | |
729 | } | |
730 | ||
731 | action.payload.add_stream_state.stream_state = | |
732 | *stream_state; | |
733 | add_action(iterator, &action); | |
734 | ||
735 | if (stream_begin_notif) { | |
736 | add_action_push_notif(iterator, stream_begin_notif); | |
737 | } else { | |
738 | ret = add_action_push_notif_stream_begin(iterator, | |
739 | notif_stream); | |
740 | if (ret) { | |
741 | goto error; | |
742 | } | |
743 | } | |
744 | } | |
745 | ||
746 | goto end; | |
747 | ||
748 | error: | |
749 | destroy_stream_state(*stream_state); | |
750 | ret = -1; | |
751 | ||
752 | end: | |
753 | return ret; | |
754 | } | |
755 | ||
756 | static | |
757 | int handle_packet_switch(struct bt_notification_iterator *iterator, | |
758 | struct bt_notification *packet_begin_notif, | |
759 | struct bt_ctf_packet *new_packet, | |
760 | struct stream_state *stream_state) | |
761 | { | |
762 | int ret = 0; | |
763 | ||
764 | if (stream_state->cur_packet == new_packet) { | |
765 | goto end; | |
766 | } | |
767 | ||
768 | if (stream_state->cur_packet) { | |
769 | /* End of the current packet */ | |
770 | ret = add_action_push_notif_packet_end(iterator, | |
771 | stream_state->cur_packet); | |
772 | if (ret) { | |
773 | goto error; | |
774 | } | |
775 | } | |
776 | ||
777 | /* Beginning of the new packet */ | |
778 | if (packet_begin_notif) { | |
779 | add_action_push_notif(iterator, packet_begin_notif); | |
780 | } else if (new_packet) { | |
781 | ret = add_action_push_notif_packet_begin(iterator, | |
782 | new_packet); | |
783 | if (ret) { | |
784 | goto error; | |
785 | } | |
786 | } | |
787 | ||
788 | add_action_set_stream_state_cur_packet(iterator, stream_state, | |
789 | new_packet); | |
790 | goto end; | |
791 | ||
792 | error: | |
793 | ret = -1; | |
794 | ||
795 | end: | |
796 | return ret; | |
797 | } | |
798 | ||
799 | static | |
800 | int handle_notif_stream_begin( | |
801 | struct bt_notification_iterator *iterator, | |
802 | struct bt_notification *notif, | |
803 | struct bt_ctf_stream *notif_stream) | |
804 | { | |
805 | int ret = 0; | |
806 | struct stream_state *stream_state; | |
807 | ||
808 | assert(notif->type == BT_NOTIFICATION_TYPE_STREAM_BEGIN); | |
809 | assert(notif_stream); | |
810 | ret = ensure_stream_state_exists(iterator, notif, notif_stream, | |
811 | &stream_state); | |
812 | if (ret) { | |
813 | goto error; | |
814 | } | |
815 | ||
816 | goto end; | |
817 | ||
818 | error: | |
819 | ret = -1; | |
820 | ||
821 | end: | |
822 | return ret; | |
823 | } | |
824 | ||
825 | static | |
826 | int handle_notif_stream_end( | |
827 | struct bt_notification_iterator *iterator, | |
828 | struct bt_notification *notif, | |
829 | struct bt_ctf_stream *notif_stream) | |
830 | { | |
831 | int ret = 0; | |
832 | struct stream_state *stream_state; | |
833 | ||
834 | assert(notif->type == BT_NOTIFICATION_TYPE_STREAM_END); | |
835 | assert(notif_stream); | |
836 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, | |
837 | &stream_state); | |
838 | if (ret) { | |
839 | goto error; | |
840 | } | |
841 | ||
842 | ret = handle_packet_switch(iterator, NULL, NULL, stream_state); | |
843 | if (ret) { | |
844 | goto error; | |
845 | } | |
846 | ||
847 | add_action_push_notif(iterator, notif); | |
848 | add_action_set_stream_state_is_ended(iterator, stream_state); | |
849 | goto end; | |
850 | ||
851 | error: | |
852 | ret = -1; | |
853 | ||
854 | end: | |
855 | return ret; | |
856 | } | |
857 | ||
858 | static | |
859 | int handle_notif_packet_begin( | |
860 | struct bt_notification_iterator *iterator, | |
861 | struct bt_notification *notif, | |
862 | struct bt_ctf_stream *notif_stream, | |
863 | struct bt_ctf_packet *notif_packet) | |
864 | { | |
865 | int ret = 0; | |
866 | struct stream_state *stream_state; | |
867 | ||
868 | assert(notif->type == BT_NOTIFICATION_TYPE_PACKET_BEGIN); | |
869 | assert(notif_packet); | |
870 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, | |
871 | &stream_state); | |
872 | if (ret) { | |
873 | goto error; | |
874 | } | |
875 | ||
876 | ret = handle_packet_switch(iterator, notif, notif_packet, stream_state); | |
877 | if (ret) { | |
878 | goto error; | |
879 | } | |
880 | ||
881 | goto end; | |
882 | ||
883 | error: | |
884 | ret = -1; | |
885 | ||
886 | end: | |
887 | return ret; | |
888 | } | |
889 | ||
890 | static | |
891 | int handle_notif_packet_end( | |
892 | struct bt_notification_iterator *iterator, | |
893 | struct bt_notification *notif, | |
894 | struct bt_ctf_stream *notif_stream, | |
895 | struct bt_ctf_packet *notif_packet) | |
896 | { | |
897 | int ret = 0; | |
898 | struct stream_state *stream_state; | |
899 | ||
900 | assert(notif->type == BT_NOTIFICATION_TYPE_PACKET_END); | |
901 | assert(notif_packet); | |
902 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, | |
903 | &stream_state); | |
904 | if (ret) { | |
905 | goto error; | |
906 | } | |
907 | ||
908 | ret = handle_packet_switch(iterator, NULL, notif_packet, stream_state); | |
909 | if (ret) { | |
910 | goto error; | |
911 | } | |
912 | ||
913 | /* End of the current packet */ | |
914 | add_action_push_notif(iterator, notif); | |
915 | add_action_set_stream_state_cur_packet(iterator, stream_state, NULL); | |
916 | goto end; | |
917 | ||
918 | error: | |
919 | ret = -1; | |
920 | ||
921 | end: | |
922 | return ret; | |
923 | } | |
924 | ||
925 | static | |
926 | int handle_notif_event( | |
927 | struct bt_notification_iterator *iterator, | |
928 | struct bt_notification *notif, | |
929 | struct bt_ctf_stream *notif_stream, | |
930 | struct bt_ctf_packet *notif_packet) | |
931 | { | |
932 | int ret = 0; | |
933 | struct stream_state *stream_state; | |
934 | ||
935 | assert(notif->type == BT_NOTIFICATION_TYPE_EVENT); | |
936 | assert(notif_packet); | |
937 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, | |
938 | &stream_state); | |
939 | if (ret) { | |
940 | goto error; | |
941 | } | |
942 | ||
943 | ret = handle_packet_switch(iterator, NULL, notif_packet, stream_state); | |
944 | if (ret) { | |
945 | goto error; | |
946 | } | |
947 | ||
948 | add_action_push_notif(iterator, notif); | |
949 | goto end; | |
950 | ||
951 | error: | |
952 | ret = -1; | |
953 | ||
954 | end: | |
955 | return ret; | |
956 | } | |
957 | ||
958 | static | |
959 | int enqueue_notification_and_automatic( | |
960 | struct bt_notification_iterator *iterator, | |
961 | struct bt_notification *notif) | |
962 | { | |
963 | int ret = 0; | |
964 | struct bt_ctf_event *notif_event = NULL; | |
965 | struct bt_ctf_stream *notif_stream = NULL; | |
966 | struct bt_ctf_packet *notif_packet = NULL; | |
967 | ||
968 | assert(notif); | |
969 | ||
970 | /* Get the stream and packet referred by the notification */ | |
971 | switch (notif->type) { | |
972 | case BT_NOTIFICATION_TYPE_EVENT: | |
973 | notif_event = bt_notification_event_borrow_event(notif); | |
974 | assert(notif_event); | |
975 | notif_packet = bt_ctf_event_borrow_packet(notif_event); | |
976 | assert(notif_packet); | |
977 | break; | |
978 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: | |
979 | notif_stream = | |
980 | bt_notification_stream_begin_borrow_stream(notif); | |
981 | assert(notif_stream); | |
982 | break; | |
983 | case BT_NOTIFICATION_TYPE_STREAM_END: | |
984 | notif_stream = bt_notification_stream_end_borrow_stream(notif); | |
985 | assert(notif_stream); | |
986 | break; | |
987 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: | |
988 | notif_packet = | |
989 | bt_notification_packet_begin_borrow_packet(notif); | |
990 | assert(notif_packet); | |
991 | break; | |
992 | case BT_NOTIFICATION_TYPE_PACKET_END: | |
993 | notif_packet = bt_notification_packet_end_borrow_packet(notif); | |
994 | assert(notif_packet); | |
995 | break; | |
996 | case BT_NOTIFICATION_TYPE_INACTIVITY: | |
997 | /* Always valid */ | |
998 | break; | |
999 | default: | |
1000 | /* | |
1001 | * Invalid type of notification. Only the notification | |
1002 | * types above are allowed to be returned by a user | |
1003 | * component. | |
1004 | */ | |
1005 | goto error; | |
1006 | } | |
1007 | ||
1008 | if (notif_packet) { | |
1009 | notif_stream = bt_ctf_packet_borrow_stream(notif_packet); | |
1010 | assert(notif_stream); | |
1011 | } | |
1012 | ||
1013 | if (!notif_stream) { | |
1014 | /* | |
1015 | * The notification has no reference to a stream: it | |
1016 | * cannot cause the creation of automatic notifications. | |
1017 | */ | |
1018 | goto end; | |
1019 | } | |
1020 | ||
1021 | if (!validate_notification(iterator, notif, notif_stream, | |
1022 | notif_packet)) { | |
1023 | goto error; | |
1024 | } | |
1025 | ||
1026 | switch (notif->type) { | |
1027 | case BT_NOTIFICATION_TYPE_EVENT: | |
1028 | ret = handle_notif_event(iterator, notif, notif_stream, | |
1029 | notif_packet); | |
1030 | break; | |
1031 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: | |
1032 | ret = handle_notif_stream_begin(iterator, notif, notif_stream); | |
1033 | break; | |
1034 | case BT_NOTIFICATION_TYPE_STREAM_END: | |
1035 | ret = handle_notif_stream_end(iterator, notif, notif_stream); | |
1036 | break; | |
1037 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: | |
1038 | ret = handle_notif_packet_begin(iterator, notif, notif_stream, | |
1039 | notif_packet); | |
1040 | break; | |
1041 | case BT_NOTIFICATION_TYPE_PACKET_END: | |
1042 | ret = handle_notif_packet_end(iterator, notif, notif_stream, | |
1043 | notif_packet); | |
1044 | break; | |
1045 | default: | |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | if (ret) { | |
1050 | goto error; | |
1051 | } | |
1052 | ||
1053 | apply_actions(iterator); | |
1054 | goto end; | |
1055 | ||
1056 | error: | |
1057 | ret = -1; | |
1058 | ||
1059 | end: | |
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | static | |
1064 | int handle_end(struct bt_notification_iterator *iterator) | |
1065 | { | |
1066 | GHashTableIter stream_state_iter; | |
1067 | gpointer stream_gptr, stream_state_gptr; | |
1068 | int ret = 0; | |
1069 | ||
1070 | /* | |
1071 | * Emit a "stream end" notification for each non-ended stream | |
1072 | * known by this iterator and mark them as ended. | |
1073 | */ | |
1074 | g_hash_table_iter_init(&stream_state_iter, iterator->stream_states); | |
1075 | ||
1076 | while (g_hash_table_iter_next(&stream_state_iter, &stream_gptr, | |
1077 | &stream_state_gptr)) { | |
1078 | struct stream_state *stream_state = stream_state_gptr; | |
1079 | ||
1080 | assert(stream_state_gptr); | |
1081 | ||
1082 | if (stream_state->is_ended) { | |
1083 | continue; | |
1084 | } | |
1085 | ||
1086 | ret = handle_packet_switch(iterator, NULL, NULL, stream_state); | |
1087 | if (ret) { | |
1088 | goto error; | |
1089 | } | |
1090 | ||
1091 | ret = add_action_push_notif_stream_end(iterator, stream_gptr); | |
1092 | if (ret) { | |
1093 | goto error; | |
1094 | } | |
1095 | ||
1096 | add_action_set_stream_state_is_ended(iterator, stream_state); | |
1097 | } | |
1098 | ||
1099 | apply_actions(iterator); | |
1100 | goto end; | |
1101 | ||
1102 | error: | |
1103 | ret = -1; | |
1104 | ||
1105 | end: | |
1106 | return ret; | |
1107 | } | |
1108 | ||
1109 | static | |
1110 | enum bt_notification_iterator_status ensure_queue_has_notifications( | |
1111 | struct bt_notification_iterator *iterator) | |
53d45b87 | 1112 | { |
890882ef PP |
1113 | struct bt_private_notification_iterator *priv_iterator = |
1114 | bt_private_notification_iterator_from_notification_iterator(iterator); | |
d3eb6e8f | 1115 | bt_component_class_notification_iterator_next_method next_method = NULL; |
fe8ad2b6 PP |
1116 | struct bt_notification_iterator_next_return next_return = { |
1117 | .status = BT_NOTIFICATION_ITERATOR_STATUS_OK, | |
1118 | .notification = NULL, | |
1119 | }; | |
3230ee6b PP |
1120 | enum bt_notification_iterator_status status = |
1121 | BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
1122 | int ret; | |
41a2b7ae | 1123 | |
3230ee6b PP |
1124 | assert(iterator); |
1125 | ||
1126 | if (iterator->queue->length > 0) { | |
1127 | /* We already have enough */ | |
1128 | goto end; | |
1129 | } | |
1130 | ||
1131 | if (iterator->is_ended) { | |
1132 | status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
41a2b7ae PP |
1133 | goto end; |
1134 | } | |
d3eb6e8f | 1135 | |
3230ee6b PP |
1136 | assert(iterator->upstream_component); |
1137 | assert(iterator->upstream_component->class); | |
d3eb6e8f | 1138 | |
3230ee6b PP |
1139 | /* Pick the appropriate "next" method */ |
1140 | switch (iterator->upstream_component->class->type) { | |
d3eb6e8f PP |
1141 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
1142 | { | |
1143 | struct bt_component_class_source *source_class = | |
3230ee6b | 1144 | container_of(iterator->upstream_component->class, |
d3eb6e8f PP |
1145 | struct bt_component_class_source, parent); |
1146 | ||
1147 | assert(source_class->methods.iterator.next); | |
1148 | next_method = source_class->methods.iterator.next; | |
1149 | break; | |
1150 | } | |
1151 | case BT_COMPONENT_CLASS_TYPE_FILTER: | |
1152 | { | |
1153 | struct bt_component_class_filter *filter_class = | |
3230ee6b | 1154 | container_of(iterator->upstream_component->class, |
d3eb6e8f PP |
1155 | struct bt_component_class_filter, parent); |
1156 | ||
1157 | assert(filter_class->methods.iterator.next); | |
1158 | next_method = filter_class->methods.iterator.next; | |
1159 | break; | |
1160 | } | |
1161 | default: | |
1162 | assert(false); | |
1163 | break; | |
1164 | } | |
1165 | ||
3230ee6b PP |
1166 | /* |
1167 | * Call the user's "next" method to get the next notification | |
1168 | * and status, skipping the forwarded automatic notifications | |
1169 | * if any. | |
1170 | */ | |
d3eb6e8f | 1171 | assert(next_method); |
41a2b7ae | 1172 | next_return = next_method(priv_iterator); |
3230ee6b PP |
1173 | if (next_return.status < 0) { |
1174 | status = next_return.status; | |
1175 | goto end; | |
1176 | } | |
1177 | ||
1178 | switch (next_return.status) { | |
1179 | case BT_NOTIFICATION_ITERATOR_STATUS_END: | |
1180 | ret = handle_end(iterator); | |
1181 | if (ret) { | |
1182 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
1183 | goto end; | |
1184 | } | |
1185 | ||
1186 | if (iterator->queue->length == 0) { | |
1187 | status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
1188 | } | |
1189 | ||
1190 | iterator->is_ended = true; | |
1191 | break; | |
1192 | case BT_NOTIFICATION_ITERATOR_STATUS_AGAIN: | |
1193 | status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
1194 | break; | |
1195 | case BT_NOTIFICATION_ITERATOR_STATUS_OK: | |
41a2b7ae | 1196 | if (!next_return.notification) { |
3230ee6b | 1197 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
41a2b7ae PP |
1198 | goto end; |
1199 | } | |
1200 | ||
3230ee6b PP |
1201 | /* |
1202 | * We know the notification is valid. Before we push it | |
1203 | * to the head of the queue, push the appropriate | |
1204 | * automatic notifications if any. | |
1205 | */ | |
1206 | ret = enqueue_notification_and_automatic(iterator, | |
41a2b7ae | 1207 | next_return.notification); |
3230ee6b PP |
1208 | BT_PUT(next_return.notification); |
1209 | if (ret) { | |
1210 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
1211 | goto end; | |
1212 | } | |
1213 | break; | |
1214 | default: | |
1215 | /* Unknown non-error status */ | |
1216 | assert(false); | |
41a2b7ae PP |
1217 | } |
1218 | ||
1219 | end: | |
3230ee6b PP |
1220 | return status; |
1221 | } | |
1222 | ||
1223 | enum bt_notification_iterator_status | |
1224 | bt_notification_iterator_next(struct bt_notification_iterator *iterator) | |
1225 | { | |
1226 | enum bt_notification_iterator_status status; | |
1227 | ||
1228 | if (!iterator) { | |
1229 | status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
1230 | goto end; | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | * Make sure that the iterator's queue contains at least one | |
1235 | * notification. | |
1236 | */ | |
1237 | status = ensure_queue_has_notifications(iterator); | |
1238 | if (status != BT_NOTIFICATION_ITERATOR_STATUS_OK) { | |
1239 | goto end; | |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * Move the notification at the tail of the queue to the | |
1244 | * iterator's current notification. | |
1245 | */ | |
1246 | assert(iterator->queue->length > 0); | |
1247 | bt_put(iterator->current_notification); | |
1248 | iterator->current_notification = g_queue_pop_tail(iterator->queue); | |
1249 | assert(iterator->current_notification); | |
1250 | ||
1251 | end: | |
1252 | return status; | |
53d45b87 JG |
1253 | } |
1254 | ||
413bc2c4 JG |
1255 | struct bt_component *bt_notification_iterator_get_component( |
1256 | struct bt_notification_iterator *iterator) | |
1257 | { | |
3230ee6b | 1258 | return bt_get(iterator->upstream_component); |
413bc2c4 JG |
1259 | } |
1260 | ||
91457551 PP |
1261 | struct bt_private_component * |
1262 | bt_private_notification_iterator_get_private_component( | |
1263 | struct bt_private_notification_iterator *private_iterator) | |
1264 | { | |
1265 | return bt_private_component_from_component( | |
1266 | bt_notification_iterator_get_component( | |
1267 | bt_notification_iterator_from_private(private_iterator))); | |
1268 | } | |
1269 | ||
9531634f JG |
1270 | enum bt_notification_iterator_status bt_notification_iterator_seek_time( |
1271 | struct bt_notification_iterator *iterator, | |
1272 | enum bt_notification_iterator_seek_origin seek_origin, | |
1273 | int64_t time) | |
1274 | { | |
b7726e32 MD |
1275 | enum bt_notification_iterator_status ret = |
1276 | BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
9531634f JG |
1277 | return ret; |
1278 | } |