Commit | Line | Data |
---|---|---|
6f3077a2 JD |
1 | /* |
2 | * iterator.c | |
3 | * | |
4 | * Babeltrace Library | |
5 | * | |
6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation | |
7 | * | |
8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@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 | ||
21 | #include <stdlib.h> | |
22 | #include <babeltrace/babeltrace.h> | |
23 | #include <babeltrace/callbacks-internal.h> | |
95d36295 | 24 | #include <babeltrace/context.h> |
08c22d05 | 25 | #include <babeltrace/context-internal.h> |
6f3077a2 JD |
26 | #include <babeltrace/ctf/metadata.h> |
27 | #include <babeltrace/iterator-internal.h> | |
6204d33c | 28 | #include <babeltrace/iterator.h> |
6f3077a2 | 29 | #include <babeltrace/prio_heap.h> |
9843982d | 30 | #include <babeltrace/ctf/events.h> |
90fcbacc | 31 | #include <inttypes.h> |
6f3077a2 JD |
32 | |
33 | struct stream_saved_pos { | |
34 | /* | |
35 | * Use file_stream pointer to check if the trace collection we | |
36 | * restore to match the one we saved from, for each stream. | |
37 | */ | |
38 | struct ctf_file_stream *file_stream; | |
39 | size_t cur_index; /* current index in packet index */ | |
40 | ssize_t offset; /* offset from base, in bits. EOF for end of file. */ | |
90fcbacc | 41 | uint64_t current_timestamp; |
6f3077a2 JD |
42 | }; |
43 | ||
e8c92a62 | 44 | struct bt_saved_pos { |
6f3077a2 JD |
45 | struct trace_collection *tc; |
46 | GArray *stream_saved_pos; /* Contains struct stream_saved_pos */ | |
47 | }; | |
48 | ||
49 | static int stream_read_event(struct ctf_file_stream *sin) | |
50 | { | |
51 | int ret; | |
52 | ||
53 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); | |
54 | if (ret == EOF) | |
55 | return EOF; | |
56 | else if (ret) { | |
3394d22e | 57 | fprintf(stderr, "[error] Reading event failed.\n"); |
6f3077a2 JD |
58 | return ret; |
59 | } | |
60 | return 0; | |
61 | } | |
62 | ||
63 | /* | |
64 | * returns true if a < b, false otherwise. | |
65 | */ | |
66 | int stream_compare(void *a, void *b) | |
67 | { | |
68 | struct ctf_file_stream *s_a = a, *s_b = b; | |
69 | ||
70 | if (s_a->parent.timestamp < s_b->parent.timestamp) | |
71 | return 1; | |
72 | else | |
73 | return 0; | |
74 | } | |
75 | ||
90fcbacc JD |
76 | void bt_iter_free_pos(struct bt_iter_pos *iter_pos) |
77 | { | |
6cba487f MD |
78 | if (!iter_pos) |
79 | return; | |
80 | ||
81 | if (iter_pos->u.restore) { | |
82 | if (iter_pos->u.restore->stream_saved_pos) { | |
83 | g_array_free( | |
84 | iter_pos->u.restore->stream_saved_pos, | |
85 | TRUE); | |
90fcbacc | 86 | } |
6cba487f | 87 | g_free(iter_pos->u.restore); |
90fcbacc | 88 | } |
6cba487f | 89 | g_free(iter_pos); |
90fcbacc JD |
90 | } |
91 | ||
dc81689e JD |
92 | /* |
93 | * seek_file_stream_by_timestamp | |
94 | * | |
95 | * Browse a filestream by index, if an index contains the timestamp passed in | |
96 | * argument, seek inside the corresponding packet it until we find the event we | |
97 | * are looking for (either the exact timestamp or the event just after the | |
98 | * timestamp). | |
99 | * | |
100 | * Return 0 if the seek succeded and EOF if we didn't find any packet | |
101 | * containing the timestamp. | |
102 | */ | |
103 | static int seek_file_stream_by_timestamp(struct ctf_file_stream *cfs, | |
104 | uint64_t timestamp) | |
105 | { | |
106 | struct ctf_stream_pos *stream_pos; | |
107 | struct packet_index *index; | |
108 | int i, ret; | |
109 | ||
110 | stream_pos = &cfs->pos; | |
111 | for (i = 0; i < stream_pos->packet_index->len; i++) { | |
112 | index = &g_array_index(stream_pos->packet_index, | |
113 | struct packet_index, i); | |
114 | if (index->timestamp_begin >= timestamp || | |
115 | index->timestamp_end <= timestamp) | |
116 | continue; | |
117 | ||
118 | stream_pos->cur_index = i; | |
119 | stream_pos->move_pos_slow(stream_pos, index->offset, SEEK_SET); | |
120 | while (cfs->parent.timestamp < timestamp) { | |
121 | ret = stream_read_event(cfs); | |
122 | if (ret < 0) | |
123 | break; | |
124 | } | |
125 | return 0; | |
126 | } | |
127 | return EOF; | |
128 | } | |
129 | ||
130 | /* | |
131 | * seek_ctf_trace_by_timestamp : for each file stream, seek to the event with | |
132 | * the corresponding timestamp | |
133 | * | |
134 | * Return 0 on success. | |
135 | * If the timestamp is not part of any file stream, return EOF to inform the | |
136 | * user the timestamp is out of the scope | |
137 | */ | |
138 | static int seek_ctf_trace_by_timestamp(struct ctf_trace *tin, | |
139 | uint64_t timestamp, struct ptr_heap *stream_heap) | |
140 | { | |
141 | int i, j, ret; | |
142 | int found = EOF; | |
143 | ||
144 | /* for each stream_class */ | |
145 | for (i = 0; i < tin->streams->len; i++) { | |
146 | struct ctf_stream_class *stream_class; | |
147 | ||
148 | stream_class = g_ptr_array_index(tin->streams, i); | |
149 | /* for each file_stream */ | |
150 | for (j = 0; j < stream_class->streams->len; j++) { | |
151 | struct ctf_stream *stream; | |
152 | struct ctf_file_stream *cfs; | |
153 | ||
154 | stream = g_ptr_array_index(stream_class->streams, j); | |
155 | cfs = container_of(stream, struct ctf_file_stream, | |
156 | parent); | |
157 | ret = seek_file_stream_by_timestamp(cfs, timestamp); | |
158 | if (ret == 0) { | |
159 | /* Add to heap */ | |
160 | ret = heap_insert(stream_heap, cfs); | |
161 | if (ret) | |
162 | goto error; | |
163 | found = 0; | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | return found; | |
169 | ||
170 | error: | |
171 | return -2; | |
172 | } | |
173 | ||
90fcbacc JD |
174 | int bt_iter_set_pos(struct bt_iter *iter, const struct bt_iter_pos *iter_pos) |
175 | { | |
dc81689e | 176 | struct trace_collection *tc; |
90fcbacc JD |
177 | int i, ret; |
178 | ||
dc81689e JD |
179 | switch (iter_pos->type) { |
180 | case BT_SEEK_RESTORE: | |
181 | if (!iter_pos->u.restore) | |
182 | goto error_arg; | |
183 | ||
90fcbacc | 184 | heap_free(iter->stream_heap); |
90fcbacc JD |
185 | ret = heap_init(iter->stream_heap, 0, stream_compare); |
186 | if (ret < 0) | |
dc81689e | 187 | goto error; |
90fcbacc JD |
188 | |
189 | for (i = 0; i < iter_pos->u.restore->stream_saved_pos->len; | |
190 | i++) { | |
191 | struct stream_saved_pos *saved_pos; | |
192 | struct ctf_stream_pos *stream_pos; | |
193 | struct packet_index *index; | |
194 | struct ctf_stream *stream; | |
195 | ||
196 | saved_pos = &g_array_index( | |
197 | iter_pos->u.restore->stream_saved_pos, | |
198 | struct stream_saved_pos, i); | |
199 | stream = &saved_pos->file_stream->parent; | |
200 | stream_pos = &saved_pos->file_stream->pos; | |
201 | index = &g_array_index(stream_pos->packet_index, | |
202 | struct packet_index, | |
203 | saved_pos->cur_index); | |
204 | ||
205 | stream_pos->cur_index = saved_pos->cur_index; | |
206 | stream_pos->move_pos_slow(stream_pos, index->offset, | |
207 | SEEK_SET); | |
208 | ||
209 | /* | |
210 | * the timestamp needs to be restored after | |
211 | * move_pos_slow, because this function resets | |
212 | * the timestamp to the beginning of the packet | |
213 | */ | |
214 | stream->timestamp = saved_pos->current_timestamp; | |
215 | stream_pos->offset = saved_pos->offset; | |
216 | stream_pos->last_offset = saved_pos->offset; | |
217 | ||
218 | stream->prev_timestamp = 0; | |
219 | stream->prev_timestamp_end = 0; | |
220 | stream->consumed = 0; | |
221 | ||
222 | printf_debug("restored to cur_index = %zd and " | |
223 | "offset = %zd, timestamp = %" PRIu64 "\n", | |
224 | stream_pos->cur_index, | |
225 | stream_pos->offset, stream->timestamp); | |
226 | ||
227 | stream_read_event(saved_pos->file_stream); | |
228 | ||
229 | /* Add to heap */ | |
230 | ret = heap_insert(iter->stream_heap, | |
231 | saved_pos->file_stream); | |
232 | if (ret) | |
233 | goto error; | |
234 | } | |
dc81689e JD |
235 | case BT_SEEK_TIME: |
236 | tc = iter->ctx->tc; | |
237 | ||
238 | if (!iter_pos->u.seek_time) | |
239 | goto error_arg; | |
240 | ||
241 | heap_free(iter->stream_heap); | |
242 | ret = heap_init(iter->stream_heap, 0, stream_compare); | |
243 | if (ret < 0) | |
244 | goto error; | |
245 | ||
246 | /* for each trace in the trace_collection */ | |
247 | for (i = 0; i < tc->array->len; i++) { | |
248 | struct ctf_trace *tin; | |
249 | struct trace_descriptor *td_read; | |
250 | ||
251 | td_read = g_ptr_array_index(tc->array, i); | |
252 | tin = container_of(td_read, struct ctf_trace, parent); | |
253 | ||
254 | ret = seek_ctf_trace_by_timestamp(tin, | |
255 | iter_pos->u.seek_time, | |
256 | iter->stream_heap); | |
257 | if (ret < 0) | |
258 | goto error; | |
259 | } | |
260 | return 0; | |
261 | default: | |
262 | /* not implemented */ | |
263 | goto error_arg; | |
90fcbacc JD |
264 | } |
265 | ||
266 | return 0; | |
dc81689e JD |
267 | |
268 | error_arg: | |
269 | ret = -EINVAL; | |
90fcbacc JD |
270 | error: |
271 | heap_free(iter->stream_heap); | |
dc81689e JD |
272 | if (heap_init(iter->stream_heap, 0, stream_compare) < 0) { |
273 | heap_free(iter->stream_heap); | |
274 | g_free(iter->stream_heap); | |
275 | iter->stream_heap = NULL; | |
276 | ret = -ENOMEM; | |
277 | } | |
278 | return ret; | |
90fcbacc JD |
279 | } |
280 | ||
281 | struct bt_iter_pos *bt_iter_get_pos(struct bt_iter *iter) | |
282 | { | |
283 | struct bt_iter_pos *pos; | |
284 | struct trace_collection *tc = iter->ctx->tc; | |
285 | int i, stream_class_id, stream_id; | |
286 | ||
287 | pos = g_new0(struct bt_iter_pos, 1); | |
90fcbacc | 288 | pos->u.restore = g_new0(struct bt_saved_pos, 1); |
90fcbacc JD |
289 | pos->u.restore->tc = tc; |
290 | pos->u.restore->stream_saved_pos = g_array_new(FALSE, TRUE, | |
291 | sizeof(struct stream_saved_pos)); | |
292 | if (!pos->u.restore->stream_saved_pos) | |
293 | goto error; | |
294 | ||
295 | for (i = 0; i < tc->array->len; i++) { | |
296 | struct ctf_trace *tin; | |
297 | struct trace_descriptor *td_read; | |
298 | ||
299 | td_read = g_ptr_array_index(tc->array, i); | |
300 | tin = container_of(td_read, struct ctf_trace, parent); | |
301 | ||
302 | for (stream_class_id = 0; stream_class_id < tin->streams->len; | |
303 | stream_class_id++) { | |
304 | struct ctf_stream_class *stream_class; | |
305 | ||
306 | stream_class = g_ptr_array_index(tin->streams, | |
307 | stream_class_id); | |
308 | for (stream_id = 0; | |
309 | stream_id < stream_class->streams->len; | |
310 | stream_id++) { | |
311 | struct ctf_stream *stream; | |
312 | struct ctf_file_stream *cfs; | |
313 | struct stream_saved_pos saved_pos; | |
314 | ||
315 | stream = g_ptr_array_index( | |
316 | stream_class->streams, | |
317 | stream_id); | |
318 | cfs = container_of(stream, | |
319 | struct ctf_file_stream, | |
320 | parent); | |
321 | ||
322 | saved_pos.file_stream = cfs; | |
323 | saved_pos.cur_index = cfs->pos.cur_index; | |
324 | ||
325 | /* | |
326 | * It is possible that an event was read during | |
327 | * the last restore, never consumed and its | |
328 | * position saved again. For this case, we | |
329 | * need to check if the event really was | |
330 | * consumed by the caller otherwise it is lost. | |
331 | */ | |
332 | if (stream->consumed) | |
333 | saved_pos.offset = cfs->pos.offset; | |
334 | else | |
335 | saved_pos.offset = cfs->pos.last_offset; | |
336 | ||
337 | saved_pos.current_timestamp = stream->timestamp; | |
338 | ||
339 | g_array_append_val( | |
340 | pos->u.restore->stream_saved_pos, | |
341 | saved_pos); | |
342 | ||
363402af | 343 | printf_debug("stream : %" PRIu64 ", cur_index : %zd, " |
90fcbacc JD |
344 | "offset : %zd, " |
345 | "timestamp = %" PRIu64 "\n", | |
346 | stream->stream_id, saved_pos.cur_index, | |
347 | saved_pos.offset, | |
348 | saved_pos.current_timestamp); | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | return pos; | |
354 | ||
355 | error: | |
356 | return NULL; | |
357 | } | |
358 | ||
dc81689e JD |
359 | struct bt_iter_pos *bt_iter_create_time_pos(struct bt_iter *iter, |
360 | uint64_t timestamp) | |
361 | { | |
362 | struct bt_iter_pos *pos; | |
363 | ||
364 | pos = g_new0(struct bt_iter_pos, 1); | |
365 | pos->type = BT_SEEK_TIME; | |
366 | pos->u.seek_time = timestamp; | |
367 | return pos; | |
368 | } | |
369 | ||
6f3077a2 JD |
370 | /* |
371 | * babeltrace_filestream_seek: seek a filestream to given position. | |
372 | * | |
373 | * The stream_id parameter is only useful for BT_SEEK_RESTORE. | |
374 | */ | |
375 | static int babeltrace_filestream_seek(struct ctf_file_stream *file_stream, | |
e8c92a62 | 376 | const struct bt_iter_pos *begin_pos, |
6f3077a2 JD |
377 | unsigned long stream_id) |
378 | { | |
379 | int ret = 0; | |
380 | ||
381 | switch (begin_pos->type) { | |
382 | case BT_SEEK_CUR: | |
383 | /* | |
384 | * just insert into the heap we should already know | |
385 | * the timestamps | |
386 | */ | |
387 | break; | |
388 | case BT_SEEK_BEGIN: | |
389 | file_stream->pos.move_pos_slow(&file_stream->pos, 0, SEEK_SET); | |
390 | ret = stream_read_event(file_stream); | |
391 | break; | |
392 | case BT_SEEK_TIME: | |
393 | case BT_SEEK_RESTORE: | |
394 | case BT_SEEK_END: | |
395 | default: | |
396 | assert(0); /* Not yet defined */ | |
397 | } | |
398 | ||
399 | return ret; | |
400 | } | |
401 | ||
402 | /* | |
e8c92a62 | 403 | * bt_iter_seek: seek iterator to given position. |
6f3077a2 | 404 | */ |
e8c92a62 JD |
405 | int bt_iter_seek(struct bt_iter *iter, |
406 | const struct bt_iter_pos *begin_pos) | |
6f3077a2 JD |
407 | { |
408 | int i, stream_id; | |
409 | int ret = 0; | |
95d36295 | 410 | struct trace_collection *tc = iter->ctx->tc; |
6f3077a2 JD |
411 | |
412 | for (i = 0; i < tc->array->len; i++) { | |
413 | struct ctf_trace *tin; | |
414 | struct trace_descriptor *td_read; | |
415 | ||
416 | td_read = g_ptr_array_index(tc->array, i); | |
417 | tin = container_of(td_read, struct ctf_trace, parent); | |
418 | ||
419 | /* Populate heap with each stream */ | |
420 | for (stream_id = 0; stream_id < tin->streams->len; | |
421 | stream_id++) { | |
422 | struct ctf_stream_class *stream; | |
423 | int filenr; | |
424 | ||
425 | stream = g_ptr_array_index(tin->streams, stream_id); | |
426 | for (filenr = 0; filenr < stream->streams->len; | |
427 | filenr++) { | |
428 | struct ctf_file_stream *file_stream; | |
429 | ||
430 | file_stream = g_ptr_array_index(stream->streams, | |
431 | filenr); | |
432 | ret = babeltrace_filestream_seek(file_stream, begin_pos, | |
433 | stream_id); | |
434 | if (ret < 0) | |
435 | goto end; | |
436 | } | |
437 | } | |
438 | } | |
439 | end: | |
440 | return ret; | |
441 | } | |
442 | ||
e8c92a62 JD |
443 | struct bt_iter *bt_iter_create(struct bt_context *ctx, |
444 | struct bt_iter_pos *begin_pos, | |
445 | struct bt_iter_pos *end_pos) | |
6f3077a2 JD |
446 | { |
447 | int i, stream_id; | |
448 | int ret = 0; | |
e8c92a62 | 449 | struct bt_iter *iter; |
6f3077a2 | 450 | |
90fcbacc | 451 | iter = g_new0(struct bt_iter, 1); |
6f3077a2 | 452 | iter->stream_heap = g_new(struct ptr_heap, 1); |
6f3077a2 JD |
453 | iter->end_pos = end_pos; |
454 | iter->callbacks = g_array_new(0, 1, sizeof(struct bt_stream_callbacks)); | |
455 | iter->recalculate_dep_graph = 0; | |
456 | iter->main_callbacks.callback = NULL; | |
457 | iter->dep_gc = g_ptr_array_new(); | |
6cba487f | 458 | bt_context_get(ctx); |
95d36295 | 459 | iter->ctx = ctx; |
6f3077a2 JD |
460 | |
461 | ret = heap_init(iter->stream_heap, 0, stream_compare); | |
462 | if (ret < 0) | |
463 | goto error_heap_init; | |
464 | ||
95d36295 | 465 | for (i = 0; i < ctx->tc->array->len; i++) { |
6f3077a2 JD |
466 | struct ctf_trace *tin; |
467 | struct trace_descriptor *td_read; | |
468 | ||
95d36295 | 469 | td_read = g_ptr_array_index(ctx->tc->array, i); |
6f3077a2 JD |
470 | tin = container_of(td_read, struct ctf_trace, parent); |
471 | ||
472 | /* Populate heap with each stream */ | |
473 | for (stream_id = 0; stream_id < tin->streams->len; | |
474 | stream_id++) { | |
475 | struct ctf_stream_class *stream; | |
476 | int filenr; | |
477 | ||
478 | stream = g_ptr_array_index(tin->streams, stream_id); | |
479 | if (!stream) | |
480 | continue; | |
481 | for (filenr = 0; filenr < stream->streams->len; | |
482 | filenr++) { | |
483 | struct ctf_file_stream *file_stream; | |
484 | ||
485 | file_stream = g_ptr_array_index(stream->streams, | |
486 | filenr); | |
487 | ||
488 | if (begin_pos) { | |
489 | ret = babeltrace_filestream_seek(file_stream, begin_pos, | |
490 | stream_id); | |
491 | if (ret == EOF) { | |
492 | ret = 0; | |
493 | continue; | |
494 | } else if (ret) { | |
495 | goto error; | |
496 | } | |
497 | } | |
498 | /* Add to heap */ | |
499 | ret = heap_insert(iter->stream_heap, file_stream); | |
500 | if (ret) | |
501 | goto error; | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | return iter; | |
507 | ||
508 | error: | |
509 | heap_free(iter->stream_heap); | |
510 | error_heap_init: | |
511 | g_free(iter->stream_heap); | |
90fcbacc | 512 | g_free(iter); |
6f3077a2 JD |
513 | return NULL; |
514 | } | |
515 | ||
e8c92a62 | 516 | void bt_iter_destroy(struct bt_iter *iter) |
6f3077a2 JD |
517 | { |
518 | struct bt_stream_callbacks *bt_stream_cb; | |
519 | struct bt_callback_chain *bt_chain; | |
520 | int i, j; | |
521 | ||
dc81689e JD |
522 | if (iter->stream_heap) { |
523 | heap_free(iter->stream_heap); | |
524 | g_free(iter->stream_heap); | |
525 | } | |
6f3077a2 JD |
526 | |
527 | /* free all events callbacks */ | |
528 | if (iter->main_callbacks.callback) | |
529 | g_array_free(iter->main_callbacks.callback, TRUE); | |
530 | ||
531 | /* free per-event callbacks */ | |
532 | for (i = 0; i < iter->callbacks->len; i++) { | |
533 | bt_stream_cb = &g_array_index(iter->callbacks, | |
534 | struct bt_stream_callbacks, i); | |
535 | if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks) | |
536 | continue; | |
537 | for (j = 0; j < bt_stream_cb->per_id_callbacks->len; j++) { | |
538 | bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks, | |
539 | struct bt_callback_chain, j); | |
540 | if (bt_chain->callback) { | |
541 | g_array_free(bt_chain->callback, TRUE); | |
542 | } | |
543 | } | |
544 | g_array_free(bt_stream_cb->per_id_callbacks, TRUE); | |
545 | } | |
546 | ||
95d36295 JD |
547 | bt_context_put(iter->ctx); |
548 | ||
90fcbacc | 549 | g_free(iter); |
6f3077a2 JD |
550 | } |
551 | ||
e8c92a62 | 552 | int bt_iter_next(struct bt_iter *iter) |
6f3077a2 JD |
553 | { |
554 | struct ctf_file_stream *file_stream, *removed; | |
555 | int ret; | |
556 | ||
557 | file_stream = heap_maximum(iter->stream_heap); | |
558 | if (!file_stream) { | |
559 | /* end of file for all streams */ | |
560 | ret = 0; | |
561 | goto end; | |
562 | } | |
563 | ||
564 | ret = stream_read_event(file_stream); | |
565 | if (ret == EOF) { | |
566 | removed = heap_remove(iter->stream_heap); | |
567 | assert(removed == file_stream); | |
568 | ret = 0; | |
569 | goto end; | |
570 | } else if (ret) { | |
571 | goto end; | |
572 | } | |
573 | /* Reinsert the file stream into the heap, and rebalance. */ | |
574 | removed = heap_replace_max(iter->stream_heap, file_stream); | |
575 | assert(removed == file_stream); | |
576 | ||
577 | end: | |
578 | return ret; | |
579 | } | |
580 | ||
9843982d | 581 | struct bt_ctf_event *bt_iter_read_ctf_event(struct bt_iter *iter) |
6f3077a2 JD |
582 | { |
583 | struct ctf_file_stream *file_stream; | |
9843982d | 584 | struct bt_ctf_event *ret = &iter->current_ctf_event; |
6f3077a2 JD |
585 | |
586 | file_stream = heap_maximum(iter->stream_heap); | |
587 | if (!file_stream) { | |
588 | /* end of file for all streams */ | |
9843982d | 589 | goto stop; |
6f3077a2 | 590 | } |
9843982d JD |
591 | ret->stream = &file_stream->parent; |
592 | ret->event = g_ptr_array_index(ret->stream->events_by_id, | |
593 | ret->stream->event_id); | |
6f3077a2 | 594 | |
9843982d | 595 | if (ret->stream->stream_id > iter->callbacks->len) |
6f3077a2 JD |
596 | goto end; |
597 | ||
9843982d | 598 | process_callbacks(iter, ret->stream); |
6f3077a2 JD |
599 | |
600 | end: | |
601 | return ret; | |
9843982d JD |
602 | stop: |
603 | return NULL; | |
6f3077a2 | 604 | } |