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adc315b8 JG |
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 JG |
33 | #include <stdint.h> |
34 | ||
adc315b8 JG |
35 | #ifdef __cplusplus |
36 | extern "C" { | |
37 | #endif | |
38 | ||
39 | struct bt_ctf_event_class; | |
40 | struct bt_ctf_stream_class; | |
41 | struct bt_ctf_clock; | |
42 | ||
43 | /* | |
44 | * bt_ctf_stream_class_create: create a stream class. | |
45 | * | |
46 | * Allocate a new stream class of the given name. The creation of an event class | |
47 | * sets its reference count to 1. | |
48 | * | |
12c8a1a3 JG |
49 | * A stream class' packet context is a structure initialized with the following |
50 | * fields: | |
51 | * - uint64_t timestamp_begin | |
52 | * - uint64_t timestamp_end | |
53 | * - uint64_t content_size | |
54 | * - uint64_t packet_size | |
55 | * - uint64_t events_discarded | |
56 | * | |
662e778c JG |
57 | * A stream class's event header is a structure initialized the following |
58 | * fields: | |
59 | * - uint32_t id | |
60 | * - uint64_t timestamp | |
61 | * | |
3ea33115 | 62 | * @param name Stream name, NULL to create an unnamed stream class. |
adc315b8 JG |
63 | * |
64 | * Returns an allocated stream class on success, NULL on error. | |
65 | */ | |
66 | extern struct bt_ctf_stream_class *bt_ctf_stream_class_create(const char *name); | |
67 | ||
69dc4535 JG |
68 | /* |
69 | * bt_ctf_stream_class_get_name: Get a stream class' name. | |
70 | * | |
71 | * @param stream_class Stream class. | |
72 | * | |
73 | * Returns the stream class' name, NULL on error. | |
74 | */ | |
75 | extern const char *bt_ctf_stream_class_get_name( | |
76 | struct bt_ctf_stream_class *stream_class); | |
77 | ||
3ea33115 JG |
78 | /* |
79 | * bt_ctf_stream_class_set_name: Set a stream class' name. | |
80 | * | |
81 | * @param stream_class Stream class. | |
82 | * | |
83 | * Returns 0 on success, a negative value on error. | |
84 | */ | |
85 | extern int bt_ctf_stream_class_set_name( | |
86 | struct bt_ctf_stream_class *stream_class, const char *name); | |
87 | ||
2f100782 JG |
88 | /* |
89 | * bt_ctf_stream_class_get_clock: get the clock associated with a stream class. | |
90 | * | |
91 | * @param stream_class Stream class. | |
92 | * | |
93 | * Returns a clock instance, NULL on error. | |
94 | */ | |
95 | extern struct bt_ctf_clock *bt_ctf_stream_class_get_clock( | |
96 | struct bt_ctf_stream_class *stream_class); | |
97 | ||
adc315b8 JG |
98 | /* |
99 | * bt_ctf_stream_class_set_clock: assign a clock to a stream class. | |
100 | * | |
101 | * Assign a clock to a stream class. This clock will be sampled each time an | |
102 | * event is appended to an instance of this stream class. | |
103 | * | |
104 | * @param stream_class Stream class. | |
105 | * @param clock Clock to assign to the provided stream class. | |
106 | * | |
107 | * Returns 0 on success, a negative value on error. | |
108 | */ | |
109 | extern int bt_ctf_stream_class_set_clock( | |
110 | struct bt_ctf_stream_class *stream_class, | |
111 | struct bt_ctf_clock *clock); | |
112 | ||
2f100782 JG |
113 | /* |
114 | * bt_ctf_stream_class_get_id: Get a stream class' id. | |
115 | * | |
116 | * @param stream_class Stream class. | |
117 | * | |
118 | * Returns the stream class' id, a negative value on error. | |
119 | */ | |
120 | extern int64_t bt_ctf_stream_class_get_id( | |
121 | struct bt_ctf_stream_class *stream_class); | |
122 | ||
123 | /* | |
124 | * bt_ctf_stream_class_set_id: Set a stream class' id. | |
125 | * | |
126 | * Set a stream class' id. Must be unique trace-wise. | |
127 | * Note that stream classes are assigned a unique id when a stream instance | |
128 | * is created for the first time from a trace or writer. | |
129 | * | |
130 | * @param stream_class Stream class. | |
131 | * @param id Stream class id. | |
132 | * | |
133 | * Returns 0 on success, a negative value on error. | |
134 | */ | |
135 | extern int bt_ctf_stream_class_set_id( | |
136 | struct bt_ctf_stream_class *stream_class, uint32_t id); | |
137 | ||
adc315b8 JG |
138 | /* |
139 | * bt_ctf_stream_class_set_clock: assign a clock to a stream class. | |
140 | * | |
141 | * Add an event class to a stream class. New events can be added even after a | |
142 | * stream has beem instanciated and events have been appended. However, a stream | |
143 | * will not accept events of a class that has not been registered beforehand. | |
144 | * The stream class will share the ownership of "event_class" by incrementing | |
145 | * its reference count. | |
146 | * | |
662e778c JG |
147 | * Note that an event class may only be added to one stream class. |
148 | * | |
adc315b8 JG |
149 | * @param stream_class Stream class. |
150 | * @param event_class Event class to add to the provided stream class. | |
151 | * | |
152 | * Returns 0 on success, a negative value on error. | |
153 | */ | |
154 | extern int bt_ctf_stream_class_add_event_class( | |
155 | struct bt_ctf_stream_class *stream_class, | |
156 | struct bt_ctf_event_class *event_class); | |
157 | ||
69dc4535 JG |
158 | /* |
159 | * bt_ctf_stream_class_get_event_class_count: Get a stream class' event class | |
160 | * count. | |
161 | * | |
162 | * @param stream_class Stream class. | |
163 | * | |
164 | * Returns the stream class' event count, a negative value on error. | |
165 | */ | |
074ee56d | 166 | extern int bt_ctf_stream_class_get_event_class_count( |
69dc4535 JG |
167 | struct bt_ctf_stream_class *stream_class); |
168 | ||
169 | /* | |
170 | * bt_ctf_stream_class_get_event_class: Get stream class event class by index. | |
171 | * | |
172 | * @param stream_class Stream class. | |
173 | * @param index Index of field. | |
174 | * | |
175 | * Returns event class, NULL on error. | |
176 | */ | |
177 | extern struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class( | |
074ee56d | 178 | struct bt_ctf_stream_class *stream_class, int index); |
69dc4535 JG |
179 | |
180 | /* | |
181 | * bt_ctf_stream_class_get_event_class_by_name: Get stream class event class by | |
182 | * name. | |
183 | * | |
184 | * @param stream_class Stream class. | |
185 | * @param name Event name. | |
186 | * | |
187 | * Returns event class, NULL on error. | |
188 | */ | |
189 | extern struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class_by_name( | |
190 | struct bt_ctf_stream_class *stream_class, const char *name); | |
191 | ||
12c8a1a3 JG |
192 | /* |
193 | * bt_ctf_stream_class_get_packet_context_type: get the stream class' packet | |
194 | * context type. | |
195 | * | |
196 | * @param stream_class Stream class. | |
197 | * | |
68c25216 | 198 | * Returns the packet context's type (a structure), NULL on error. |
12c8a1a3 JG |
199 | */ |
200 | extern struct bt_ctf_field_type *bt_ctf_stream_class_get_packet_context_type( | |
201 | struct bt_ctf_stream_class *stream_class); | |
202 | ||
203 | /* | |
204 | * bt_ctf_stream_class_set_packet_context_type: set the stream class' packet | |
205 | * context type. | |
206 | * | |
207 | * @param stream_class Stream class. | |
68c25216 | 208 | * @param packet_context_type Packet context type (must be a structure). |
12c8a1a3 JG |
209 | * |
210 | * Returns 0 on success, a negative value on error. | |
211 | */ | |
212 | extern int bt_ctf_stream_class_set_packet_context_type( | |
213 | struct bt_ctf_stream_class *stream_class, | |
214 | struct bt_ctf_field_type *packet_context_type); | |
215 | ||
662e778c JG |
216 | /* |
217 | * bt_ctf_stream_class_get_event_header_type: get the stream class' | |
218 | * event header type. | |
219 | * | |
220 | * @param stream_class Stream class. | |
221 | * | |
222 | * Returns the stream event header's type (a structure), NULL on error. | |
223 | */ | |
224 | extern struct bt_ctf_field_type * | |
225 | bt_ctf_stream_class_get_event_header_type( | |
226 | struct bt_ctf_stream_class *stream_class); | |
227 | ||
228 | /* | |
229 | * bt_ctf_stream_class_set_event_header_type: set the stream class' | |
230 | * event header type. | |
231 | * | |
232 | * @param stream_class Stream class. | |
233 | * @param event_header_type Event header type (must be a structure). | |
234 | * | |
235 | * Returns 0 on success, a negative value on error. | |
236 | */ | |
237 | extern int bt_ctf_stream_class_set_event_header_type( | |
238 | struct bt_ctf_stream_class *stream_class, | |
239 | struct bt_ctf_field_type *event_header_type); | |
240 | ||
af181248 JG |
241 | /* |
242 | * bt_ctf_stream_class_get_event_context_type: get the stream class' | |
243 | * event context type. | |
244 | * | |
245 | * @param stream_class Stream class. | |
246 | * | |
247 | * Returns the stream event context's type (a structure), NULL on error. | |
248 | */ | |
249 | extern struct bt_ctf_field_type * | |
250 | bt_ctf_stream_class_get_event_context_type( | |
251 | struct bt_ctf_stream_class *stream_class); | |
252 | ||
253 | /* | |
254 | * bt_ctf_stream_class_set_event_context_type: set the stream class' | |
255 | * event context type. | |
256 | * | |
257 | * @param stream_class Stream class. | |
258 | * @param event_context_type Event context type (must be a structure). | |
259 | * | |
260 | * Returns 0 on success, a negative value on error. | |
261 | */ | |
262 | extern int bt_ctf_stream_class_set_event_context_type( | |
263 | struct bt_ctf_stream_class *stream_class, | |
264 | struct bt_ctf_field_type *event_context_type); | |
265 | ||
adc315b8 JG |
266 | /* |
267 | * bt_ctf_stream_class_get and bt_ctf_stream_class_put: increment and | |
268 | * decrement the stream class' reference count. | |
269 | * | |
270 | * These functions ensure that the stream class won't be destroyed while it | |
271 | * is in use. The same number of get and put (plus one extra put to | |
272 | * release the initial reference done at creation) have to be done to | |
273 | * destroy a stream class. | |
274 | * | |
275 | * When the stream class' reference count is decremented to 0 by a | |
276 | * bt_ctf_stream_class_put, the stream class is freed. | |
277 | * | |
278 | * @param stream_class Stream class. | |
279 | */ | |
280 | extern void bt_ctf_stream_class_get(struct bt_ctf_stream_class *stream_class); | |
281 | extern void bt_ctf_stream_class_put(struct bt_ctf_stream_class *stream_class); | |
282 | ||
283 | #ifdef __cplusplus | |
284 | } | |
285 | #endif | |
286 | ||
287 | #endif /* BABELTRACE_CTF_IR_STREAM_CLASS_H */ |