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1 | #ifndef BABELTRACE_CTF_IR_STREAM_H |
2 | #define BABELTRACE_CTF_IR_STREAM_H | |
3 | ||
4 | /* | |
5 | * BabelTrace - CTF IR: Stream | |
6 | * | |
7 | * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
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 | ||
ffc6a64e | 33 | #include <stdint.h> |
3f043b05 JG |
34 | |
35 | #ifdef __cplusplus | |
36 | extern "C" { | |
37 | #endif | |
38 | ||
9d408fca PP |
39 | struct bt_ctf_stream_class; |
40 | ||
54f61f03 PP |
41 | /** |
42 | @defgroup ctfirstream CTF IR stream | |
43 | @ingroup ctfir | |
44 | @brief CTF IR stream. | |
45 | ||
6dd2bd0c PP |
46 | @code |
47 | #include <babeltrace/ctf-ir/stream.h> | |
48 | @endcode | |
49 | ||
54f61f03 | 50 | @note |
dfeca116 PP |
51 | See \ref ctfwriterstream which documents additional CTF IR stream |
52 | functions exclusive to the CTF writer mode. | |
54f61f03 PP |
53 | |
54 | A CTF IR <strong><em>stream</em></strong> is an instance of a | |
55 | \link ctfirstreamclass CTF IR stream class\endlink. | |
56 | ||
57 | You can obtain a CTF IR stream object in two different modes: | |
58 | ||
cfe11c58 PP |
59 | - <strong>Normal mode</strong>: use bt_ctf_stream_create() or |
60 | bt_ctf_stream_create_with_id() with a stream class having a | |
61 | \link ctfirtraceclass CTF IR trace class\endlink parent | |
dfeca116 | 62 | \em not created by a \link ctfwriter CTF writer\endlink object to |
54f61f03 | 63 | create a default stream. |
dfeca116 PP |
64 | - <strong>CTF writer mode</strong>: use bt_ctf_stream_create() with |
65 | a stream class having a trace class parent created by a CTF writer | |
54f61f03 PP |
66 | object, or use bt_ctf_writer_create_stream(). |
67 | ||
68 | A CTF IR stream object represents a CTF stream, that is, a sequence of | |
69 | packets containing events: | |
70 | ||
71 | @imgtracestructure | |
72 | ||
73 | A CTF IR stream does not contain, however, actual \link ctfirpacket CTF | |
74 | IR packet\endlink objects: it only acts as a common parent to identify | |
75 | the original CTF stream of packet objects. | |
76 | ||
77 | As with any Babeltrace object, CTF IR stream objects have | |
78 | <a href="https://en.wikipedia.org/wiki/Reference_counting">reference | |
79 | counts</a>. See \ref refs to learn more about the reference counting | |
80 | management of Babeltrace objects. | |
81 | ||
82 | @sa ctfirstreamclass | |
83 | @sa ctfirpacket | |
dfeca116 | 84 | @sa ctfwriterstream |
54f61f03 PP |
85 | |
86 | @file | |
87 | @brief CTF IR stream type and functions. | |
88 | @sa ctfirstream | |
89 | ||
90 | @addtogroup ctfirstream | |
91 | @{ | |
92 | */ | |
93 | ||
d0218df1 PP |
94 | /** |
95 | @struct bt_ctf_stream | |
96 | @brief A CTF IR stream. | |
97 | @sa ctfirstream | |
dfeca116 | 98 | @sa ctfwriterstream |
d0218df1 | 99 | */ |
3f043b05 | 100 | struct bt_ctf_stream; |
54f61f03 PP |
101 | struct bt_ctf_event; |
102 | ||
103 | /** | |
104 | @brief Creates a default CTF IR stream named \p name from the CTF IR | |
105 | stream class \p stream_class. | |
3f043b05 | 106 | |
54f61f03 PP |
107 | \p stream_class \em must have a parent |
108 | \link ctfirtraceclass CTF IR trace class\endlink. | |
109 | ||
110 | If the parent \link ctfirtraceclass trace class\endlink of | |
dfeca116 PP |
111 | \p stream_class was created by a \link ctfwriter CTF writer\endlink |
112 | object, then the stream object is created in CTF writer mode, and | |
113 | you can use the functions of \ref ctfwriterstream on it. | |
54f61f03 PP |
114 | Otherwise it is created in normal mode: you should only use the |
115 | functions documented in this module on it. | |
116 | ||
117 | \p name can be \c NULL to create an unnamed stream object. | |
118 | ||
119 | @param[in] stream_class CTF IR stream class to use to create the | |
120 | CTF IR stream. | |
121 | @param[in] name Name of the stream object to create (copied on | |
122 | success) or \c NULL to create an unnamed stream. | |
123 | @returns Created stream object, or \c NULL on error. | |
124 | ||
125 | @prenotnull{stream_class} | |
126 | @pre \p stream_class has a parent trace class. | |
127 | @postsuccessrefcountret1 | |
cfe11c58 PP |
128 | |
129 | @sa bt_ctf_stream_create_with_id(): Create a CTF IR stream with a | |
130 | specific ID. | |
54f61f03 | 131 | */ |
319fd969 | 132 | extern struct bt_ctf_stream *bt_ctf_stream_create( |
b71d7298 PP |
133 | struct bt_ctf_stream_class *stream_class, |
134 | const char *name); | |
135 | ||
cfe11c58 PP |
136 | /** |
137 | @brief Creates a default CTF IR stream named \p name with ID \p id | |
138 | from the CTF IR stream class \p stream_class. | |
139 | ||
140 | \p stream_class \em must have a parent | |
141 | \link ctfirtraceclass CTF IR trace class\endlink. | |
142 | ||
143 | You \em must have created the trace class of \p stream class directly | |
144 | with bt_ctf_trace_create(), not through bt_ctf_writer_create() (use | |
145 | bt_ctf_stream_create() for this). | |
146 | ||
147 | \p id \em must be unique amongst the IDs of all the streams created | |
148 | from \p stream_class with bt_ctf_stream_create_with_id(). | |
149 | ||
150 | \p name can be \c NULL to create an unnamed stream object. | |
151 | ||
152 | @param[in] stream_class CTF IR stream class to use to create the | |
153 | CTF IR stream. | |
154 | @param[in] name Name of the stream object to create (copied on | |
155 | success) or \c NULL to create an unnamed stream. | |
156 | @param[in] id ID of the stream object to create. | |
157 | @returns Created stream object, or \c NULL on error. | |
158 | ||
159 | @prenotnull{stream_class} | |
160 | @pre \p id is lesser than or equal to 9223372036854775807 (\c INT64_MAX). | |
161 | @pre \p stream_class has a parent trace class. | |
162 | @postsuccessrefcountret1 | |
163 | ||
164 | @sa bt_ctf_stream_create(): Create a CTF IR stream without an ID. | |
165 | */ | |
166 | extern struct bt_ctf_stream *bt_ctf_stream_create_with_id( | |
167 | struct bt_ctf_stream_class *stream_class, | |
168 | const char *name, uint64_t id); | |
169 | ||
54f61f03 PP |
170 | /** |
171 | @brief Returns the name of the CTF IR stream \p stream. | |
172 | ||
173 | On success, \p stream remains the sole owner of the returned string. | |
174 | ||
175 | @param[in] stream Stream object of which to get the name. | |
176 | @returns Name of stream \p stream, or \c NULL if | |
177 | \p stream is unnamed or on error. | |
178 | ||
179 | @prenotnull{stream} | |
180 | @postrefcountsame{stream} | |
181 | */ | |
b71d7298 | 182 | extern const char *bt_ctf_stream_get_name(struct bt_ctf_stream *stream); |
319fd969 | 183 | |
cfe11c58 PP |
184 | /** |
185 | @brief Returns the numeric ID of the CTF IR stream \p stream. | |
186 | ||
187 | @param[in] stream Stream of which to get the numeric ID. | |
188 | @returns ID of stream \p stream, or a negative value | |
189 | on error. | |
190 | ||
191 | @prenotnull{stream} | |
192 | @postrefcountsame{stream} | |
193 | */ | |
194 | extern int64_t bt_ctf_stream_get_id(struct bt_ctf_stream *stream); | |
195 | ||
54f61f03 PP |
196 | /** |
197 | @brief Returns the parent CTF IR stream class of the CTF IR | |
198 | stream \p stream. | |
199 | ||
200 | This function returns a reference to the stream class which was used | |
201 | to create the stream object in the first place with | |
202 | bt_ctf_stream_create(). | |
203 | ||
204 | @param[in] stream Stream of which to get the parent stream class. | |
205 | @returns Parent stream class of \p stream, | |
206 | or \c NULL on error. | |
207 | ||
208 | @prenotnull{stream} | |
c2f29fb9 | 209 | @postrefcountsame{stream} |
54f61f03 PP |
210 | @postsuccessrefcountretinc |
211 | */ | |
3baf0856 JG |
212 | extern struct bt_ctf_stream_class *bt_ctf_stream_get_class( |
213 | struct bt_ctf_stream *stream); | |
214 | ||
54f61f03 PP |
215 | /** @} */ |
216 | ||
3f043b05 JG |
217 | #ifdef __cplusplus |
218 | } | |
219 | #endif | |
220 | ||
221 | #endif /* BABELTRACE_CTF_IR_STREAM_H */ |