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1 | #ifndef BABELTRACE_CTF_IR_STREAM_CLASS_H |
2 | #define BABELTRACE_CTF_IR_STREAM_CLASS_H | |
3 | ||
4 | /* | |
5 | * BabelTrace - CTF IR: Stream Class | |
6 | * | |
de9dd397 | 7 | * Copyright 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
adc315b8 JG |
8 | * |
9 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice shall be included in | |
19 | * all copies or substantial portions of the Software. | |
20 | * | |
21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
27 | * SOFTWARE. | |
28 | * | |
29 | * The Common Trace Format (CTF) Specification is available at | |
30 | * http://www.efficios.com/ctf | |
31 | */ | |
32 | ||
48d711a2 | 33 | #include <stdint.h> |
8bf65fbd | 34 | #include <babeltrace/ctf-ir/visitor.h> |
48d711a2 | 35 | |
adc315b8 JG |
36 | #ifdef __cplusplus |
37 | extern "C" { | |
38 | #endif | |
39 | ||
594a3fb7 PP |
40 | /** |
41 | @defgroup ctfirstreamclass CTF IR stream class | |
42 | @ingroup ctfir | |
43 | @brief CTF IR stream class. | |
44 | ||
319f672c PP |
45 | @note |
46 | See \ref ctfirwriterstreamclass which documents additional CTF IR stream | |
47 | class functions exclusive to the CTF IR writer mode. | |
48 | ||
594a3fb7 PP |
49 | A CTF IR <strong><em>stream class</em></strong> is a template that you |
50 | can use to create concrete \link ctfirstream CTF IR streams\endlink. | |
51 | ||
52 | A stream class has the following properties, both of which \em must | |
53 | be unique amongst all the stream classes contained in the same | |
54 | \link ctfirtraceclass CTF IR trace class\endlink: | |
55 | ||
56 | - A \b name. | |
57 | - A numeric \b ID. | |
58 | ||
59 | In the Babeltrace CTF IR system, a \link ctfirtraceclass trace class\endlink | |
60 | contains zero or more stream classes, | |
61 | and a stream class contains zero or more | |
62 | \link ctfireventclass event classes\endlink. | |
63 | You can add an event class | |
64 | to a stream class with bt_ctf_stream_class_add_event_class(). | |
65 | You can add a stream class to a trace class with | |
66 | bt_ctf_trace_add_stream_class(). | |
67 | ||
68 | A stream class owns three \link ctfirfieldtypes field types\endlink: | |
69 | ||
70 | - An optional <strong>stream packet context</strong> field type, which | |
71 | represents the \c stream.packet.context CTF scope. | |
72 | - An optional <strong>stream event header</strong> field type, which | |
73 | represents the \c stream.event.header CTF scope. | |
74 | - An optional <strong>stream event context</strong> field type, which | |
75 | represents the \c stream.event.context CTF scope. | |
76 | ||
77 | Those three field types \em must be structure field types as of | |
78 | Babeltrace \btversion. | |
79 | ||
80 | As per the CTF specification, the event header field type \em must | |
81 | contain a field named \c id if the stream class contains more than one | |
82 | event class. | |
83 | ||
84 | As a reminder, here's the structure of a CTF packet: | |
85 | ||
86 | @imgpacketstructure | |
87 | ||
88 | Before you can create a stream from a stream class with | |
89 | bt_ctf_stream_create(), you \em must add the prepared stream class to a | |
90 | trace class by calling bt_ctf_trace_add_stream_class(). | |
91 | ||
92 | As with any Babeltrace object, CTF IR stream class objects have | |
93 | <a href="https://en.wikipedia.org/wiki/Reference_counting">reference | |
94 | counts</a>. See \ref refs to learn more about the reference counting | |
95 | management of Babeltrace objects. | |
96 | ||
97 | The following functions \em freeze their stream class parameter on | |
98 | success: | |
99 | ||
100 | - bt_ctf_trace_add_stream_class() | |
101 | - bt_ctf_event_create() | |
102 | - bt_ctf_writer_create_stream() | |
319f672c | 103 | (\link ctfirwriter CTF IR writer\endlink mode only) |
594a3fb7 PP |
104 | |
105 | You cannot modify a frozen stream class: it is considered immutable, | |
106 | except for: | |
107 | ||
108 | - Adding an event class to it with | |
109 | bt_ctf_stream_class_add_event_class(). | |
110 | - \link refs Reference counting\endlink. | |
111 | ||
112 | @sa ctfirstream | |
113 | @sa ctfireventclass | |
114 | @sa ctfirtraceclass | |
319f672c | 115 | @sa ctfirwriterstreamclass |
594a3fb7 PP |
116 | |
117 | @file | |
118 | @brief CTF IR stream class type and functions. | |
119 | @sa ctfirstreamclass | |
120 | ||
121 | @addtogroup ctfirstreamclass | |
122 | @{ | |
123 | */ | |
124 | ||
125 | /** | |
126 | @struct bt_ctf_stream_class | |
127 | @brief A CTF IR stream class. | |
128 | @sa ctfirstreamclass | |
129 | */ | |
adc315b8 | 130 | struct bt_ctf_stream_class; |
594a3fb7 | 131 | struct bt_ctf_event_class; |
adc315b8 JG |
132 | struct bt_ctf_clock; |
133 | ||
594a3fb7 PP |
134 | /** |
135 | @name Creation and parent access functions | |
136 | @{ | |
137 | */ | |
138 | ||
139 | /** | |
140 | @brief Creates a default CTF IR stream class named \p name, or a | |
141 | default unnamed stream class if \p name is \c NULL. | |
142 | ||
143 | On success, the packet context field type of the created stream class | |
144 | has the following fields: | |
145 | ||
146 | - <code>timestamp_begin</code>: a 64-bit unsigned integer field type. | |
147 | - <code>timestamp_end</code>: a 64-bit unsigned integer field type. | |
148 | - <code>content_size</code>: a 64-bit unsigned integer field type. | |
149 | - <code>packet_size</code>: a 64-bit unsigned integer field type. | |
150 | - <code>events_discarded</code>: a 64-bit unsigned integer field type. | |
151 | ||
152 | On success, the event header field type of the created stream class | |
153 | has the following fields: | |
154 | ||
155 | - <code>code</code>: a 32-bit unsigned integer field type. | |
156 | - <code>timestamp</code>: a 64-bit unsigned integer field type. | |
157 | ||
158 | You can modify those default field types after the stream class is | |
159 | created with bt_ctf_stream_class_set_packet_context_type() and | |
160 | bt_ctf_stream_class_set_event_header_type(). | |
161 | ||
162 | @param[in] name Name of the stream class to create (can be \c NULL to | |
163 | create an unnamed stream class). | |
164 | @returns Created stream class, or \c NULL on error. | |
165 | ||
166 | @postsuccessrefcountret1 | |
167 | */ | |
adc315b8 JG |
168 | extern struct bt_ctf_stream_class *bt_ctf_stream_class_create(const char *name); |
169 | ||
594a3fb7 PP |
170 | /** |
171 | @brief Returns the parent CTF IR trace class of the CTF IR stream | |
172 | class \p stream_class. | |
173 | ||
174 | It is possible that the stream class was not added to a trace class | |
175 | yet, in which case this function returns \c NULL. You can add a | |
176 | stream class to a trace class with | |
177 | bt_ctf_trace_add_stream_class(). | |
178 | ||
179 | @param[in] stream_class Stream class of which to get the parent | |
180 | trace class. | |
181 | @returns Parent trace class of \p stream_class, | |
182 | or \c NULL if \p stream_class was not | |
183 | added to a trace class yet or on error. | |
184 | ||
185 | @prenotnull{stream_class} | |
186 | @postsuccessrefcountretinc | |
187 | ||
188 | @sa bt_ctf_trace_add_stream_class(): Add a stream class to | |
189 | a trace class. | |
190 | */ | |
142c5610 JG |
191 | extern struct bt_ctf_trace *bt_ctf_stream_class_get_trace( |
192 | struct bt_ctf_stream_class *stream_class); | |
193 | ||
594a3fb7 PP |
194 | /** @} */ |
195 | ||
196 | /** | |
197 | @name Properties functions | |
198 | @{ | |
199 | */ | |
200 | ||
201 | /** | |
202 | @brief Returns the name of the CTF IR stream class \p stream_class. | |
203 | ||
204 | On success, \p stream_class remains the sole owner of the returned | |
205 | string. | |
206 | ||
207 | @param[in] stream_class Stream class of which to get the name. | |
208 | @returns Name of stream class \p stream_class, or | |
209 | \c NULL if \p stream_class is unnamed or | |
210 | on error. | |
211 | ||
212 | @prenotnull{stream_class} | |
213 | @postrefcountsame{stream_class} | |
214 | ||
215 | @sa bt_ctf_stream_class_set_name(): Sets the name of a given | |
216 | stream class. | |
217 | */ | |
69dc4535 JG |
218 | extern const char *bt_ctf_stream_class_get_name( |
219 | struct bt_ctf_stream_class *stream_class); | |
220 | ||
594a3fb7 PP |
221 | /** |
222 | @brief Sets the name of the CTF IR stream class | |
223 | \p stream_class to \p name. | |
224 | ||
225 | \p name must be unique amongst the names of all the stream classes | |
226 | of the trace class to which you eventually add \p stream_class. | |
227 | ||
228 | @param[in] stream_class Stream class of which to set the name. | |
229 | @param[in] name Name of the stream class (copied on success). | |
230 | @returns 0 on success, or a negative value on error. | |
231 | ||
232 | @prenotnull{stream_class} | |
233 | @prenotnull{name} | |
234 | @prehot{stream_class} | |
235 | @postrefcountsame{stream_class} | |
236 | ||
237 | @sa bt_ctf_stream_class_get_name(): Returns the name of a given | |
238 | stream class. | |
239 | */ | |
3ea33115 JG |
240 | extern int bt_ctf_stream_class_set_name( |
241 | struct bt_ctf_stream_class *stream_class, const char *name); | |
242 | ||
594a3fb7 PP |
243 | /** |
244 | @brief Returns the numeric ID of the CTF IR stream class \p stream_class. | |
2f100782 | 245 | |
594a3fb7 PP |
246 | @param[in] stream_class Stream class of which to get the numeric ID. |
247 | @returns ID of stream class \p stream_class, or a | |
248 | negative value on error. | |
249 | ||
250 | @prenotnull{stream_class} | |
251 | @postrefcountsame{stream_class} | |
252 | ||
253 | @sa bt_ctf_stream_class_set_id(): Sets the numeric ID of a given | |
254 | stream class. | |
255 | */ | |
2f100782 JG |
256 | extern int64_t bt_ctf_stream_class_get_id( |
257 | struct bt_ctf_stream_class *stream_class); | |
258 | ||
594a3fb7 PP |
259 | /** |
260 | @brief Sets the numeric ID of the CTF IR stream class | |
261 | \p stream_class to \p id. | |
262 | ||
263 | \p id must be unique amongst the IDs of all the stream classes | |
264 | of the trace class to which you eventually add \p stream_class. | |
265 | ||
266 | @param[in] stream_class Stream class of which to set the numeric ID. | |
267 | @param[in] id ID of the stream class. | |
268 | @returns 0 on success, or a negative value on error. | |
269 | ||
270 | @prenotnull{stream_class} | |
271 | @prehot{stream_class} | |
272 | @postrefcountsame{stream_class} | |
273 | ||
274 | @sa bt_ctf_stream_class_get_id(): Returns the numeric ID of a given | |
275 | stream class. | |
276 | */ | |
2f100782 JG |
277 | extern int bt_ctf_stream_class_set_id( |
278 | struct bt_ctf_stream_class *stream_class, uint32_t id); | |
279 | ||
594a3fb7 | 280 | /** @} */ |
adc315b8 | 281 | |
594a3fb7 PP |
282 | /** |
283 | @name Contained field types functions | |
284 | @{ | |
285 | */ | |
69dc4535 | 286 | |
594a3fb7 PP |
287 | /** |
288 | @brief Returns the packet context field type of the CTF IR stream class | |
289 | \p stream_class. | |
69dc4535 | 290 | |
594a3fb7 PP |
291 | @param[in] stream_class Stream class of which to get the packet |
292 | context field type. | |
293 | @returns Packet context field type of \p stream_class, | |
294 | or \c NULL on error. | |
69dc4535 | 295 | |
594a3fb7 PP |
296 | @prenotnull{stream_class} |
297 | @postsuccessrefcountretinc | |
0863f950 | 298 | |
594a3fb7 PP |
299 | @sa bt_ctf_stream_class_set_packet_context_type(): Sets the packet |
300 | context field type of a given stream class. | |
301 | */ | |
12c8a1a3 JG |
302 | extern struct bt_ctf_field_type *bt_ctf_stream_class_get_packet_context_type( |
303 | struct bt_ctf_stream_class *stream_class); | |
304 | ||
594a3fb7 PP |
305 | /** |
306 | @brief Sets the packet context field type of the CTF IR stream class | |
307 | \p stream_class to \p packet_context_type. | |
308 | ||
309 | As of Babeltrace \btversion, \p packet_context_type \em must be a | |
310 | CTF IR structure field type object. | |
311 | ||
312 | @param[in] stream_class Stream class of which to set the packet | |
313 | context field type. | |
314 | @param[in] packet_context_type Packet context field type. | |
315 | @returns 0 on success, or a negative value on error. | |
316 | ||
317 | @prenotnull{stream_class} | |
318 | @prenotnull{packet_context_type} | |
319 | @prehot{stream_class} | |
320 | @preisstructft{packet_context_type} | |
321 | @postrefcountsame{stream_class} | |
322 | @postsuccessrefcountinc{packet_context_type} | |
323 | ||
324 | @sa bt_ctf_stream_class_get_packet_context_type(): Returns the packet | |
325 | context field type of a given stream class. | |
326 | */ | |
12c8a1a3 JG |
327 | extern int bt_ctf_stream_class_set_packet_context_type( |
328 | struct bt_ctf_stream_class *stream_class, | |
329 | struct bt_ctf_field_type *packet_context_type); | |
330 | ||
594a3fb7 PP |
331 | /** |
332 | @brief Returns the event header field type of the CTF IR stream class | |
333 | \p stream_class. | |
334 | ||
335 | @param[in] stream_class Stream class of which to get the event header | |
336 | field type. | |
337 | @returns Event header field type of \p stream_class, | |
338 | or \c NULL on error. | |
339 | ||
340 | @prenotnull{stream_class} | |
341 | @postsuccessrefcountretinc | |
342 | ||
343 | @sa bt_ctf_stream_class_set_event_header_type(): Sets the event | |
344 | header field type of a given stream class. | |
345 | */ | |
662e778c JG |
346 | extern struct bt_ctf_field_type * |
347 | bt_ctf_stream_class_get_event_header_type( | |
348 | struct bt_ctf_stream_class *stream_class); | |
349 | ||
594a3fb7 PP |
350 | /** |
351 | @brief Sets the event header field type of the CTF IR stream class | |
352 | \p stream_class to \p event_header_type. | |
353 | ||
354 | As of Babeltrace \btversion, \p event_header_type \em must be a | |
355 | CTF IR structure field type object. | |
356 | ||
357 | @param[in] stream_class Stream class of which to set the event | |
358 | header field type. | |
359 | @param[in] event_header_type Event header field type. | |
360 | @returns 0 on success, or a negative value on error. | |
361 | ||
362 | @prenotnull{stream_class} | |
363 | @prenotnull{event_header_type} | |
364 | @prehot{stream_class} | |
365 | @preisstructft{event_header_type} | |
366 | @postrefcountsame{stream_class} | |
367 | @postsuccessrefcountinc{event_header_type} | |
368 | ||
369 | @sa bt_ctf_stream_class_get_event_header_type(): Returns the event | |
370 | header field type of a given stream class. | |
371 | */ | |
662e778c JG |
372 | extern int bt_ctf_stream_class_set_event_header_type( |
373 | struct bt_ctf_stream_class *stream_class, | |
374 | struct bt_ctf_field_type *event_header_type); | |
375 | ||
594a3fb7 PP |
376 | /** |
377 | @brief Returns the per-stream class event context field type of the | |
378 | CTF IR stream class \p stream_class. | |
379 | ||
380 | @param[in] stream_class Stream class of which to get the per-stream | |
381 | class event context field type. | |
382 | @returns Per-stream class event context field type of | |
383 | \p stream_class, or \c NULL on error. | |
384 | ||
385 | @prenotnull{stream_class} | |
386 | @postsuccessrefcountretinc | |
387 | ||
388 | @sa bt_ctf_stream_class_set_event_context_type(): Sets the per-stream | |
389 | class event context field type of a given stream class. | |
390 | */ | |
af181248 JG |
391 | extern struct bt_ctf_field_type * |
392 | bt_ctf_stream_class_get_event_context_type( | |
393 | struct bt_ctf_stream_class *stream_class); | |
394 | ||
594a3fb7 PP |
395 | /** |
396 | @brief Sets the per-stream class event context field type of the CTF | |
397 | IR stream class \p stream_class to \p event_context_type. | |
398 | ||
399 | As of Babeltrace \btversion, \p event_context_type \em must be a | |
400 | CTF IR structure field type object. | |
401 | ||
402 | @param[in] stream_class Stream class of which to set the | |
403 | per-stream class event context | |
404 | field type. | |
405 | @param[in] event_context_type Per-stream class event context context | |
406 | field type. | |
407 | @returns 0 on success, or a negative value on error. | |
408 | ||
409 | @prenotnull{stream_class} | |
410 | @prenotnull{event_context_type} | |
411 | @prehot{stream_class} | |
412 | @preisstructft{event_context_type} | |
413 | @postrefcountsame{stream_class} | |
414 | @postsuccessrefcountinc{event_context_type} | |
415 | ||
416 | @sa bt_ctf_stream_class_get_event_context_type(): Returns the per-stream | |
417 | class event context field type of a given stream class. | |
418 | */ | |
af181248 JG |
419 | extern int bt_ctf_stream_class_set_event_context_type( |
420 | struct bt_ctf_stream_class *stream_class, | |
421 | struct bt_ctf_field_type *event_context_type); | |
422 | ||
594a3fb7 PP |
423 | /** @} */ |
424 | ||
425 | /** | |
426 | @name Event class children functions | |
427 | @{ | |
428 | */ | |
429 | ||
430 | /** | |
431 | @brief Returns the number of event classes contained in the | |
432 | CTF IR stream class \p stream_class. | |
433 | ||
434 | @param[in] stream_class Stream class of which to get the number | |
435 | of children event classes. | |
436 | @returns Number of children event classes | |
437 | contained in \p stream_class, or | |
438 | a negative value on error. | |
439 | ||
440 | @prenotnull{stream_class} | |
441 | @postrefcountsame{stream_class} | |
442 | */ | |
443 | extern int bt_ctf_stream_class_get_event_class_count( | |
444 | struct bt_ctf_stream_class *stream_class); | |
445 | ||
446 | /** | |
447 | @brief Returns the event class at index \p index in the CTF IR stream | |
448 | class \p stream_class. | |
449 | ||
450 | @param[in] stream_class Stream class of which to get the event class. | |
451 | @param[in] index Index of the event class to find. | |
452 | @returns Event class at index \p index, or \c NULL | |
453 | on error. | |
454 | ||
455 | @prenotnull{stream_class} | |
456 | @pre \p index is lesser than the number of event classes contained in the | |
457 | stream class \p stream_class (see | |
458 | bt_ctf_stream_class_get_event_class_count()). | |
459 | @postrefcountsame{stream_class} | |
460 | @postsuccessrefcountretinc | |
461 | ||
462 | @sa bt_ctf_stream_class_get_event_class_by_id(): Finds an event class | |
463 | by ID. | |
464 | @sa bt_ctf_stream_class_get_event_class_by_name(): Finds an event class | |
465 | by name. | |
466 | */ | |
467 | extern struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class( | |
468 | struct bt_ctf_stream_class *stream_class, int index); | |
469 | ||
470 | /** | |
471 | @brief Returns the event class named \c name found in the CTF IR stream | |
472 | class \p stream_class. | |
473 | ||
474 | @param[in] stream_class Stream class of which to get the event class. | |
475 | @param[in] name Name of the event class to find. | |
476 | @returns Event class named \p name, or \c NULL | |
477 | on error. | |
478 | ||
479 | @prenotnull{stream_class} | |
480 | @prenotnull{name} | |
481 | @postrefcountsame{stream_class} | |
482 | @postsuccessrefcountretinc | |
483 | ||
484 | @sa bt_ctf_stream_class_get_event_class_by_id(): Finds an event class | |
485 | by ID. | |
486 | */ | |
487 | extern struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class_by_name( | |
488 | struct bt_ctf_stream_class *stream_class, const char *name); | |
489 | ||
490 | /** | |
491 | @brief Returns the event class with ID \c id found in the CTF IR stream | |
492 | class \p stream_class. | |
493 | ||
494 | @param[in] stream_class Stream class of which to get the event class. | |
495 | @param[in] id ID of the event class to find. | |
496 | @returns Event class with ID \p id, or \c NULL | |
497 | on error. | |
498 | ||
499 | @prenotnull{stream_class} | |
500 | @postrefcountsame{stream_class} | |
501 | @postsuccessrefcountretinc | |
502 | ||
503 | @sa bt_ctf_stream_class_get_event_class_by_name(): Finds an event class | |
504 | by name. | |
505 | */ | |
506 | extern struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class_by_id( | |
507 | struct bt_ctf_stream_class *stream_class, uint32_t id); | |
508 | ||
509 | /** | |
510 | @brief Adds the CTF IR event class \p event_class to the | |
511 | CTF IR stream class \p stream_class. | |
512 | ||
513 | On success, \p event_class becomes the child of \p stream_class. | |
514 | ||
515 | You can only add a given event class to one stream class. | |
516 | ||
517 | You can call this function even if \p stream_class is frozen. Adding | |
518 | event classes is the only operation that is permitted | |
519 | on a frozen stream class. | |
520 | ||
521 | @param[in] stream_class Stream class to which to add \p event_class. | |
522 | @param[in] event_class Event class to add to \p stream_class. | |
523 | @returns 0 on success, or a negative value on error. | |
524 | ||
525 | @prenotnull{stream_class} | |
526 | @prenotnull{event_class} | |
527 | @prehot{event_class} | |
528 | @postrefcountsame{stream_class} | |
529 | @postsuccessrefcountinc{event_class} | |
2fc61597 | 530 | @postsuccessfrozen{event_class} |
594a3fb7 PP |
531 | */ |
532 | extern int bt_ctf_stream_class_add_event_class( | |
533 | struct bt_ctf_stream_class *stream_class, | |
534 | struct bt_ctf_event_class *event_class); | |
535 | ||
536 | /** @} */ | |
537 | ||
538 | /** | |
539 | @name Misc. function | |
540 | @{ | |
541 | */ | |
542 | ||
543 | /** | |
544 | @brief Accepts the visitor \p visitor to visit the hierarchy of the | |
545 | CTF IR stream class \p stream_class. | |
546 | ||
547 | This function traverses the hierarchy of \p stream_class in pre-order | |
548 | and calls \p visitor on each element. | |
549 | ||
550 | The stream class itself is visited first, and then all its children | |
551 | event classes. | |
552 | ||
553 | @param[in] stream_class Stream class to visit. | |
554 | @param[in] visitor Visiting function. | |
555 | @param[in] data User data. | |
556 | @returns 0 on success, or a negative value on error. | |
557 | ||
558 | @prenotnull{stream_class} | |
559 | @prenotnull{visitor} | |
560 | */ | |
8bf65fbd | 561 | extern int bt_ctf_stream_class_visit(struct bt_ctf_stream_class *stream_class, |
d9a13d86 | 562 | bt_ctf_visitor visitor, void *data); |
8bf65fbd | 563 | |
594a3fb7 PP |
564 | /** @} */ |
565 | ||
566 | /** @} */ | |
567 | ||
568 | // TODO: document for writer | |
569 | extern struct bt_ctf_clock *bt_ctf_stream_class_get_clock( | |
570 | struct bt_ctf_stream_class *stream_class); | |
571 | ||
adc315b8 JG |
572 | #ifdef __cplusplus |
573 | } | |
574 | #endif | |
575 | ||
576 | #endif /* BABELTRACE_CTF_IR_STREAM_CLASS_H */ |