Remove Babeltrace 1 files and reorganize the tree
[babeltrace.git] / lib / ctf-ir / stream-class.c
1 /*
2 * stream-class.c
3 *
4 * Babeltrace CTF IR - Stream Class
5 *
6 * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
7 *
8 * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * SOFTWARE.
27 */
28
29 #include <babeltrace/ctf-writer/clock.h>
30 #include <babeltrace/ctf-writer/clock-internal.h>
31 #include <babeltrace/ctf-ir/clock-class-internal.h>
32 #include <babeltrace/ctf-writer/event.h>
33 #include <babeltrace/ctf-ir/event-class-internal.h>
34 #include <babeltrace/ctf-ir/event-internal.h>
35 #include <babeltrace/ctf-ir/field-types-internal.h>
36 #include <babeltrace/ctf-ir/fields-internal.h>
37 #include <babeltrace/ctf-writer/stream.h>
38 #include <babeltrace/ctf-ir/stream-class-internal.h>
39 #include <babeltrace/ctf-ir/validation-internal.h>
40 #include <babeltrace/ctf-ir/visitor-internal.h>
41 #include <babeltrace/ctf-writer/functor-internal.h>
42 #include <babeltrace/ctf-ir/utils.h>
43 #include <babeltrace/ref.h>
44 #include <babeltrace/compiler.h>
45 #include <babeltrace/align.h>
46 #include <babeltrace/endian.h>
47 #include <inttypes.h>
48
49 static
50 void bt_ctf_stream_class_destroy(struct bt_object *obj);
51 static
52 int init_event_header(struct bt_ctf_stream_class *stream_class);
53 static
54 int init_packet_context(struct bt_ctf_stream_class *stream_class);
55
56 struct bt_ctf_stream_class *bt_ctf_stream_class_create(const char *name)
57 {
58 int ret;
59 struct bt_ctf_stream_class *stream_class = NULL;
60
61 if (name && bt_ctf_validate_identifier(name)) {
62 goto error;
63 }
64
65 stream_class = g_new0(struct bt_ctf_stream_class, 1);
66 if (!stream_class) {
67 goto error;
68 }
69
70 stream_class->name = g_string_new(name);
71 stream_class->event_classes = g_ptr_array_new_with_free_func(
72 (GDestroyNotify) bt_object_release);
73 if (!stream_class->event_classes) {
74 goto error;
75 }
76
77 stream_class->event_classes_ht = g_hash_table_new_full(g_int64_hash,
78 g_int64_equal, g_free, NULL);
79
80 ret = init_event_header(stream_class);
81 if (ret) {
82 goto error;
83 }
84
85 ret = init_packet_context(stream_class);
86 if (ret) {
87 goto error;
88 }
89
90 bt_object_init(stream_class, bt_ctf_stream_class_destroy);
91 return stream_class;
92
93 error:
94 BT_PUT(stream_class);
95 return stream_class;
96 }
97
98 struct bt_ctf_trace *bt_ctf_stream_class_get_trace(
99 struct bt_ctf_stream_class *stream_class)
100 {
101 return stream_class ?
102 bt_get(bt_ctf_stream_class_borrow_trace(stream_class)) :
103 NULL;
104 }
105
106 const char *bt_ctf_stream_class_get_name(
107 struct bt_ctf_stream_class *stream_class)
108 {
109 const char *name = NULL;
110
111 if (!stream_class) {
112 goto end;
113 }
114
115 name = stream_class->name->str;
116 end:
117 return name;
118 }
119
120 int bt_ctf_stream_class_set_name(struct bt_ctf_stream_class *stream_class,
121 const char *name)
122 {
123 int ret = 0;
124
125 if (!stream_class || stream_class->frozen) {
126 ret = -1;
127 goto end;
128 }
129
130 g_string_assign(stream_class->name, name);
131 end:
132 return ret;
133 }
134
135 struct bt_ctf_clock *bt_ctf_stream_class_get_clock(
136 struct bt_ctf_stream_class *stream_class)
137 {
138 struct bt_ctf_clock *clock = NULL;
139
140 if (!stream_class || !stream_class->clock) {
141 goto end;
142 }
143
144 clock = bt_get(stream_class->clock);
145 end:
146 return clock;
147 }
148
149 int bt_ctf_stream_class_set_clock(struct bt_ctf_stream_class *stream_class,
150 struct bt_ctf_clock *clock)
151 {
152 int ret = 0;
153 struct bt_ctf_field_type *timestamp_field = NULL;
154
155 if (!stream_class || !clock || stream_class->frozen) {
156 ret = -1;
157 goto end;
158 }
159
160 /*
161 * Look for a "timestamp" integer field type in the stream
162 * class's event header field type and map the stream class's
163 * clock's class to that field type if there's no current
164 * mapping.
165 */
166 timestamp_field = bt_ctf_field_type_structure_get_field_type_by_name(
167 stream_class->event_header_type, "timestamp");
168 if (timestamp_field) {
169 struct bt_ctf_clock_class *mapped_clock_class =
170 bt_ctf_field_type_integer_get_mapped_clock_class(
171 timestamp_field);
172
173 if (!mapped_clock_class) {
174 ret = bt_ctf_field_type_integer_set_mapped_clock_class(
175 timestamp_field, clock->clock_class);
176 if (ret) {
177 goto end;
178 }
179 }
180
181 BT_PUT(mapped_clock_class);
182 }
183
184 /* Replace the current clock of this stream class. */
185 bt_put(stream_class->clock);
186 stream_class->clock = bt_get(clock);
187
188 end:
189 bt_put(timestamp_field);
190 return ret;
191 }
192
193 int64_t bt_ctf_stream_class_get_id(struct bt_ctf_stream_class *stream_class)
194 {
195 int64_t ret;
196
197 if (!stream_class || !stream_class->id_set) {
198 ret = -1;
199 goto end;
200 }
201
202 ret = (int64_t) stream_class->id;
203 end:
204 return ret;
205 }
206
207 BT_HIDDEN
208 int _bt_ctf_stream_class_set_id(
209 struct bt_ctf_stream_class *stream_class, uint32_t id)
210 {
211 stream_class->id = id;
212 stream_class->id_set = 1;
213 return 0;
214 }
215
216 struct event_class_set_stream_id_data {
217 uint32_t stream_id;
218 int ret;
219 };
220
221 static
222 void event_class_set_stream_id(gpointer event_class, gpointer data)
223 {
224 struct event_class_set_stream_id_data *typed_data = data;
225
226 typed_data->ret |= bt_ctf_event_class_set_stream_id(event_class,
227 typed_data->stream_id);
228 }
229
230 BT_HIDDEN
231 int bt_ctf_stream_class_set_id_no_check(
232 struct bt_ctf_stream_class *stream_class, uint32_t id)
233 {
234 int ret = 0;
235 struct event_class_set_stream_id_data data =
236 { .stream_id = id, .ret = 0 };
237
238 /*
239 * Make sure all event classes have their "stream_id" attribute
240 * set to this value.
241 */
242 g_ptr_array_foreach(stream_class->event_classes,
243 event_class_set_stream_id, &data);
244 ret = data.ret;
245 if (ret) {
246 goto end;
247 }
248
249 ret = _bt_ctf_stream_class_set_id(stream_class, id);
250 if (ret) {
251 goto end;
252 }
253 end:
254 return ret;
255 }
256
257 int bt_ctf_stream_class_set_id(struct bt_ctf_stream_class *stream_class,
258 uint32_t id)
259 {
260 int ret = 0;
261
262 if (!stream_class || stream_class->frozen) {
263 ret = -1;
264 goto end;
265 }
266
267 ret = bt_ctf_stream_class_set_id_no_check(stream_class, id);
268 end:
269 return ret;
270 }
271
272 static
273 void event_class_exists(gpointer element, gpointer query)
274 {
275 struct bt_ctf_event_class *event_class_a = element;
276 struct search_query *search_query = query;
277 struct bt_ctf_event_class *event_class_b = search_query->value;
278 int64_t id_a, id_b;
279
280 if (search_query->value == element) {
281 search_query->found = 1;
282 goto end;
283 }
284
285 /*
286 * Two event classes cannot share the same name in a given
287 * stream class.
288 */
289 if (!strcmp(bt_ctf_event_class_get_name(event_class_a),
290 bt_ctf_event_class_get_name(event_class_b))) {
291 search_query->found = 1;
292 goto end;
293 }
294
295 /*
296 * Two event classes cannot share the same ID in a given
297 * stream class.
298 */
299 id_a = bt_ctf_event_class_get_id(event_class_a);
300 id_b = bt_ctf_event_class_get_id(event_class_b);
301
302 if (id_a < 0 || id_b < 0) {
303 /* at least one ID is not set: will be automatically set later */
304 goto end;
305 }
306
307 if (id_a == id_b) {
308 search_query->found = 1;
309 goto end;
310 }
311
312 end:
313 return;
314 }
315
316 int bt_ctf_stream_class_add_event_class(
317 struct bt_ctf_stream_class *stream_class,
318 struct bt_ctf_event_class *event_class)
319 {
320 int ret = 0;
321 int64_t *event_id = NULL;
322 struct bt_ctf_trace *trace = NULL;
323 struct bt_ctf_stream_class *old_stream_class = NULL;
324 struct bt_ctf_validation_output validation_output = { 0 };
325 struct bt_ctf_field_type *packet_header_type = NULL;
326 struct bt_ctf_field_type *packet_context_type = NULL;
327 struct bt_ctf_field_type *event_header_type = NULL;
328 struct bt_ctf_field_type *stream_event_ctx_type = NULL;
329 struct bt_ctf_field_type *event_context_type = NULL;
330 struct bt_ctf_field_type *event_payload_type = NULL;
331 const enum bt_ctf_validation_flag validation_flags =
332 BT_CTF_VALIDATION_FLAG_EVENT;
333
334 if (!stream_class || !event_class) {
335 ret = -1;
336 goto end;
337 }
338
339 event_id = g_new(int64_t, 1);
340 if (!event_id) {
341 ret = -1;
342 goto end;
343 }
344
345 /* Check for duplicate event classes */
346 struct search_query query = { .value = event_class, .found = 0 };
347 g_ptr_array_foreach(stream_class->event_classes, event_class_exists,
348 &query);
349 if (query.found) {
350 ret = -1;
351 goto end;
352 }
353
354 old_stream_class = bt_ctf_event_class_get_stream_class(event_class);
355 if (old_stream_class) {
356 /* Event class is already associated to a stream class. */
357 ret = -1;
358 goto end;
359 }
360
361 trace = bt_ctf_stream_class_get_trace(stream_class);
362 if (trace) {
363 /*
364 * If the stream class is associated with a trace, then
365 * both those objects are frozen. Also, this event class
366 * is about to be frozen.
367 *
368 * Therefore the event class must be validated here.
369 * The trace and stream class should be valid at this
370 * point.
371 */
372 assert(trace->valid);
373 assert(stream_class->valid);
374 packet_header_type =
375 bt_ctf_trace_get_packet_header_type(trace);
376 packet_context_type =
377 bt_ctf_stream_class_get_packet_context_type(
378 stream_class);
379 event_header_type =
380 bt_ctf_stream_class_get_event_header_type(stream_class);
381 stream_event_ctx_type =
382 bt_ctf_stream_class_get_event_context_type(
383 stream_class);
384 event_context_type =
385 bt_ctf_event_class_get_context_type(event_class);
386 event_payload_type =
387 bt_ctf_event_class_get_payload_type(event_class);
388 ret = bt_ctf_validate_class_types(
389 trace->environment, packet_header_type,
390 packet_context_type, event_header_type,
391 stream_event_ctx_type, event_context_type,
392 event_payload_type, trace->valid,
393 stream_class->valid, event_class->valid,
394 &validation_output, validation_flags);
395 BT_PUT(packet_header_type);
396 BT_PUT(packet_context_type);
397 BT_PUT(event_header_type);
398 BT_PUT(stream_event_ctx_type);
399 BT_PUT(event_context_type);
400 BT_PUT(event_payload_type);
401
402 if (ret) {
403 /*
404 * This means something went wrong during the
405 * validation process, not that the objects are
406 * invalid.
407 */
408 goto end;
409 }
410
411 if ((validation_output.valid_flags & validation_flags) !=
412 validation_flags) {
413 /* Invalid event class */
414 ret = -1;
415 goto end;
416 }
417 }
418
419 /* Only set an event ID if none was explicitly set before */
420 *event_id = bt_ctf_event_class_get_id(event_class);
421 if (*event_id < 0) {
422 if (bt_ctf_event_class_set_id(event_class,
423 stream_class->next_event_id++)) {
424 ret = -1;
425 goto end;
426 }
427 *event_id = stream_class->next_event_id;
428 }
429
430 ret = bt_ctf_event_class_set_stream_id(event_class, stream_class->id);
431 if (ret) {
432 goto end;
433 }
434
435 bt_object_set_parent(event_class, stream_class);
436
437 if (trace) {
438 /*
439 * At this point we know that the function will be
440 * successful. Therefore we can replace the event
441 * class's field types with what's in the validation
442 * output structure and mark this event class as valid.
443 */
444 bt_ctf_validation_replace_types(NULL, NULL, event_class,
445 &validation_output, validation_flags);
446 event_class->valid = 1;
447
448 /*
449 * Put what was not moved in
450 * bt_ctf_validation_replace_types().
451 */
452 bt_ctf_validation_output_put_types(&validation_output);
453 }
454
455 /* Add to the event classes of the stream class */
456 g_ptr_array_add(stream_class->event_classes, event_class);
457 g_hash_table_insert(stream_class->event_classes_ht, event_id,
458 event_class);
459 event_id = NULL;
460
461 /* Freeze the event class */
462 bt_ctf_event_class_freeze(event_class);
463
464 /* Notifiy listeners of the trace's schema modification. */
465 if (trace) {
466 struct bt_ctf_object obj = { .object = event_class,
467 .type = BT_CTF_OBJECT_TYPE_EVENT_CLASS };
468
469 (void) bt_ctf_trace_object_modification(&obj, trace);
470 }
471 end:
472 BT_PUT(trace);
473 BT_PUT(old_stream_class);
474 bt_ctf_validation_output_put_types(&validation_output);
475 assert(!packet_header_type);
476 assert(!packet_context_type);
477 assert(!event_header_type);
478 assert(!stream_event_ctx_type);
479 assert(!event_context_type);
480 assert(!event_payload_type);
481 g_free(event_id);
482
483 return ret;
484 }
485
486 int bt_ctf_stream_class_get_event_class_count(
487 struct bt_ctf_stream_class *stream_class)
488 {
489 int ret;
490
491 if (!stream_class) {
492 ret = -1;
493 goto end;
494 }
495
496 ret = (int) stream_class->event_classes->len;
497 end:
498 return ret;
499 }
500
501 struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class(
502 struct bt_ctf_stream_class *stream_class, int index)
503 {
504 struct bt_ctf_event_class *event_class = NULL;
505
506 if (!stream_class || index < 0 ||
507 index >= stream_class->event_classes->len) {
508 goto end;
509 }
510
511 event_class = g_ptr_array_index(stream_class->event_classes, index);
512 bt_get(event_class);
513 end:
514 return event_class;
515 }
516
517 struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class_by_name(
518 struct bt_ctf_stream_class *stream_class, const char *name)
519 {
520 size_t i;
521 struct bt_ctf_event_class *event_class = NULL;
522
523 if (!stream_class || !name) {
524 goto end;
525 }
526
527 for (i = 0; i < stream_class->event_classes->len; i++) {
528 struct bt_ctf_event_class *cur_event_class =
529 g_ptr_array_index(stream_class->event_classes, i);
530 const char *cur_event_class_name =
531 bt_ctf_event_class_get_name(cur_event_class);
532
533 if (!strcmp(name, cur_event_class_name)) {
534 event_class = cur_event_class;
535 bt_get(event_class);
536 goto end;
537 }
538 }
539 end:
540 return event_class;
541 }
542
543 struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class_by_id(
544 struct bt_ctf_stream_class *stream_class, uint32_t id)
545 {
546 int64_t id_key = id;
547 struct bt_ctf_event_class *event_class = NULL;
548
549 if (!stream_class) {
550 goto end;
551 }
552
553 event_class = g_hash_table_lookup(stream_class->event_classes_ht,
554 &id_key);
555 bt_get(event_class);
556 end:
557 return event_class;
558 }
559
560 struct bt_ctf_field_type *bt_ctf_stream_class_get_packet_context_type(
561 struct bt_ctf_stream_class *stream_class)
562 {
563 struct bt_ctf_field_type *ret = NULL;
564
565 if (!stream_class) {
566 goto end;
567 }
568
569 bt_get(stream_class->packet_context_type);
570 ret = stream_class->packet_context_type;
571 end:
572 return ret;
573 }
574
575 int bt_ctf_stream_class_set_packet_context_type(
576 struct bt_ctf_stream_class *stream_class,
577 struct bt_ctf_field_type *packet_context_type)
578 {
579 int ret = 0;
580
581 if (!stream_class || stream_class->frozen) {
582 ret = -1;
583 goto end;
584 }
585
586 if (packet_context_type &&
587 bt_ctf_field_type_get_type_id(packet_context_type) !=
588 BT_CTF_TYPE_ID_STRUCT) {
589 /* A packet context must be a structure. */
590 ret = -1;
591 goto end;
592 }
593
594 bt_put(stream_class->packet_context_type);
595 bt_get(packet_context_type);
596 stream_class->packet_context_type = packet_context_type;
597 end:
598 return ret;
599 }
600
601 struct bt_ctf_field_type *bt_ctf_stream_class_get_event_header_type(
602 struct bt_ctf_stream_class *stream_class)
603 {
604 struct bt_ctf_field_type *ret = NULL;
605
606 if (!stream_class || !stream_class->event_header_type) {
607 goto end;
608 }
609
610 bt_get(stream_class->event_header_type);
611 ret = stream_class->event_header_type;
612 end:
613 return ret;
614 }
615
616 int bt_ctf_stream_class_set_event_header_type(
617 struct bt_ctf_stream_class *stream_class,
618 struct bt_ctf_field_type *event_header_type)
619 {
620 int ret = 0;
621
622 if (!stream_class || stream_class->frozen) {
623 ret = -1;
624 goto end;
625 }
626
627 if (event_header_type &&
628 bt_ctf_field_type_get_type_id(event_header_type) !=
629 BT_CTF_TYPE_ID_STRUCT) {
630 /* An event header must be a structure. */
631 ret = -1;
632 goto end;
633 }
634
635 bt_put(stream_class->event_header_type);
636 stream_class->event_header_type = bt_get(event_header_type);
637 end:
638 return ret;
639 }
640
641 struct bt_ctf_field_type *bt_ctf_stream_class_get_event_context_type(
642 struct bt_ctf_stream_class *stream_class)
643 {
644 struct bt_ctf_field_type *ret = NULL;
645
646 if (!stream_class || !stream_class->event_context_type) {
647 goto end;
648 }
649
650 bt_get(stream_class->event_context_type);
651 ret = stream_class->event_context_type;
652 end:
653 return ret;
654 }
655
656 int bt_ctf_stream_class_set_event_context_type(
657 struct bt_ctf_stream_class *stream_class,
658 struct bt_ctf_field_type *event_context_type)
659 {
660 int ret = 0;
661
662 if (!stream_class || stream_class->frozen) {
663 ret = -1;
664 goto end;
665 }
666
667 if (event_context_type &&
668 bt_ctf_field_type_get_type_id(event_context_type) !=
669 BT_CTF_TYPE_ID_STRUCT) {
670 /* A packet context must be a structure. */
671 ret = -1;
672 goto end;
673 }
674
675 bt_put(stream_class->event_context_type);
676 stream_class->event_context_type = bt_get(event_context_type);
677 end:
678 return ret;
679 }
680
681 void bt_ctf_stream_class_get(struct bt_ctf_stream_class *stream_class)
682 {
683 bt_get(stream_class);
684 }
685
686 void bt_ctf_stream_class_put(struct bt_ctf_stream_class *stream_class)
687 {
688 bt_put(stream_class);
689 }
690
691 static
692 int get_event_class_count(void *element)
693 {
694 return bt_ctf_stream_class_get_event_class_count(
695 (struct bt_ctf_stream_class *) element);
696 }
697
698 static
699 void *get_event_class(void *element, int i)
700 {
701 return bt_ctf_stream_class_get_event_class(
702 (struct bt_ctf_stream_class *) element, i);
703 }
704
705 static
706 int visit_event_class(void *object, bt_ctf_visitor visitor,void *data)
707 {
708 struct bt_ctf_object obj =
709 { .object = object,
710 .type = BT_CTF_OBJECT_TYPE_EVENT_CLASS };
711
712 return visitor(&obj, data);
713 }
714
715 int bt_ctf_stream_class_visit(struct bt_ctf_stream_class *stream_class,
716 bt_ctf_visitor visitor, void *data)
717 {
718 int ret;
719 struct bt_ctf_object obj =
720 { .object = stream_class,
721 .type = BT_CTF_OBJECT_TYPE_STREAM_CLASS };
722
723 if (!stream_class || !visitor) {
724 ret = -1;
725 goto end;
726 }
727
728 ret = visitor_helper(&obj, get_event_class_count,
729 get_event_class,
730 visit_event_class, visitor, data);
731 end:
732 return ret;
733 }
734
735 BT_HIDDEN
736 void bt_ctf_stream_class_freeze(struct bt_ctf_stream_class *stream_class)
737 {
738 if (!stream_class) {
739 return;
740 }
741
742 stream_class->frozen = 1;
743 bt_ctf_field_type_freeze(stream_class->event_header_type);
744 bt_ctf_field_type_freeze(stream_class->packet_context_type);
745 bt_ctf_field_type_freeze(stream_class->event_context_type);
746
747 if (stream_class->clock) {
748 bt_ctf_clock_class_freeze(stream_class->clock->clock_class);
749 }
750 }
751
752 BT_HIDDEN
753 int bt_ctf_stream_class_serialize(struct bt_ctf_stream_class *stream_class,
754 struct metadata_context *context)
755 {
756 int64_t ret = 0;
757 size_t i;
758
759 g_string_assign(context->field_name, "");
760 context->current_indentation_level = 1;
761 if (!stream_class->id_set) {
762 ret = -1;
763 goto end;
764 }
765
766 g_string_append_printf(context->string,
767 "stream {\n\tid = %" PRIu32 ";\n\tevent.header := ",
768 stream_class->id);
769 ret = bt_ctf_field_type_serialize(stream_class->event_header_type,
770 context);
771 if (ret) {
772 goto end;
773 }
774
775 if (stream_class->packet_context_type) {
776 g_string_append(context->string, ";\n\n\tpacket.context := ");
777 ret = bt_ctf_field_type_serialize(stream_class->packet_context_type,
778 context);
779 if (ret) {
780 goto end;
781 }
782 }
783
784 if (stream_class->event_context_type) {
785 g_string_append(context->string, ";\n\n\tevent.context := ");
786 ret = bt_ctf_field_type_serialize(
787 stream_class->event_context_type, context);
788 if (ret) {
789 goto end;
790 }
791 }
792
793 g_string_append(context->string, ";\n};\n\n");
794 for (i = 0; i < stream_class->event_classes->len; i++) {
795 struct bt_ctf_event_class *event_class =
796 stream_class->event_classes->pdata[i];
797
798 ret = bt_ctf_event_class_serialize(event_class, context);
799 if (ret) {
800 goto end;
801 }
802 }
803 end:
804 context->current_indentation_level = 0;
805 return ret;
806 }
807
808 static
809 void bt_ctf_stream_class_destroy(struct bt_object *obj)
810 {
811 struct bt_ctf_stream_class *stream_class;
812
813 stream_class = container_of(obj, struct bt_ctf_stream_class, base);
814 bt_put(stream_class->clock);
815
816 if (stream_class->event_classes_ht) {
817 g_hash_table_destroy(stream_class->event_classes_ht);
818 }
819 if (stream_class->event_classes) {
820 g_ptr_array_free(stream_class->event_classes, TRUE);
821 }
822
823 if (stream_class->name) {
824 g_string_free(stream_class->name, TRUE);
825 }
826
827 bt_put(stream_class->event_header_type);
828 bt_put(stream_class->packet_context_type);
829 bt_put(stream_class->event_context_type);
830 g_free(stream_class);
831 }
832
833 static
834 int init_event_header(struct bt_ctf_stream_class *stream_class)
835 {
836 int ret = 0;
837 struct bt_ctf_field_type *event_header_type =
838 bt_ctf_field_type_structure_create();
839 struct bt_ctf_field_type *_uint32_t =
840 get_field_type(FIELD_TYPE_ALIAS_UINT32_T);
841 struct bt_ctf_field_type *_uint64_t =
842 get_field_type(FIELD_TYPE_ALIAS_UINT64_T);
843
844 if (!event_header_type) {
845 ret = -1;
846 goto end;
847 }
848
849 ret = bt_ctf_field_type_structure_add_field(event_header_type,
850 _uint32_t, "id");
851 if (ret) {
852 goto end;
853 }
854
855 ret = bt_ctf_field_type_structure_add_field(event_header_type,
856 _uint64_t, "timestamp");
857 if (ret) {
858 goto end;
859 }
860
861 if (stream_class->event_header_type) {
862 bt_put(stream_class->event_header_type);
863 }
864 stream_class->event_header_type = event_header_type;
865 end:
866 if (ret) {
867 bt_put(event_header_type);
868 }
869
870 bt_put(_uint32_t);
871 bt_put(_uint64_t);
872 return ret;
873 }
874
875 static
876 int init_packet_context(struct bt_ctf_stream_class *stream_class)
877 {
878 int ret = 0;
879 struct bt_ctf_field_type *packet_context_type =
880 bt_ctf_field_type_structure_create();
881 struct bt_ctf_field_type *_uint64_t =
882 get_field_type(FIELD_TYPE_ALIAS_UINT64_T);
883
884 if (!packet_context_type) {
885 ret = -1;
886 goto end;
887 }
888
889 /*
890 * We create a stream packet context as proposed in the CTF
891 * specification.
892 */
893 ret = bt_ctf_field_type_structure_add_field(packet_context_type,
894 _uint64_t, "timestamp_begin");
895 if (ret) {
896 goto end;
897 }
898
899 ret = bt_ctf_field_type_structure_add_field(packet_context_type,
900 _uint64_t, "timestamp_end");
901 if (ret) {
902 goto end;
903 }
904
905 ret = bt_ctf_field_type_structure_add_field(packet_context_type,
906 _uint64_t, "content_size");
907 if (ret) {
908 goto end;
909 }
910
911 ret = bt_ctf_field_type_structure_add_field(packet_context_type,
912 _uint64_t, "packet_size");
913 if (ret) {
914 goto end;
915 }
916
917 ret = bt_ctf_field_type_structure_add_field(packet_context_type,
918 _uint64_t, "events_discarded");
919 if (ret) {
920 goto end;
921 }
922
923 bt_put(stream_class->packet_context_type);
924 stream_class->packet_context_type = packet_context_type;
925 end:
926 if (ret) {
927 bt_put(packet_context_type);
928 goto end;
929 }
930
931 bt_put(_uint64_t);
932 return ret;
933 }
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