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1 | #ifndef BABELTRACE_CTF_WRITER_STREAM_H |
2 | #define BABELTRACE_CTF_WRITER_STREAM_H | |
3 | ||
46bd0f2b JG |
4 | /* |
5 | * BabelTrace - CTF Writer: Stream | |
6 | * | |
de9dd397 | 7 | * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
46bd0f2b 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 | ||
3f043b05 | 33 | #include <babeltrace/ctf-ir/stream.h> |
8c18d80b PP |
34 | #include <babeltrace/ctf-writer/stream-class.h> |
35 | ||
36 | #ifdef __cplusplus | |
37 | extern "C" { | |
38 | #endif | |
39 | ||
40 | /* | |
41 | * bt_ctf_stream_get_discarded_events_count: get the number of discarded | |
42 | * events associated with this stream. | |
43 | * | |
44 | * Note that discarded events are not stored if the stream's packet | |
45 | * context has no "events_discarded" field. An error will be returned | |
46 | * in that case. | |
47 | * | |
48 | * @param stream Stream instance. | |
49 | * | |
50 | * Returns the number of discarded events, a negative value on error. | |
51 | */ | |
37949e9e | 52 | extern int bt_ctf_stream_get_discarded_events_count( |
8c18d80b PP |
53 | struct bt_ctf_stream *stream, uint64_t *count); |
54 | ||
55 | /* | |
56 | * bt_ctf_stream_append_discarded_events: increment discarded events count. | |
57 | * | |
58 | * Increase the current packet's discarded event count. Has no effect if the | |
59 | * stream class' packet context has no "events_discarded" field. | |
60 | * | |
61 | * @param stream Stream instance. | |
62 | * @param event_count Number of discarded events to add to the stream's current | |
63 | * packet. | |
64 | */ | |
65 | extern void bt_ctf_stream_append_discarded_events(struct bt_ctf_stream *stream, | |
66 | uint64_t event_count); | |
67 | ||
68 | /* | |
69 | * bt_ctf_stream_append_event: append an event to the stream. | |
70 | * | |
71 | * Append "event" to the stream's current packet. The stream's associated clock | |
72 | * will be sampled during this call. The event shall not be modified after | |
73 | * being appended to a stream. The stream will share the event's ownership by | |
74 | * incrementing its reference count. The current packet is not flushed to disk | |
75 | * until the next call to bt_ctf_stream_flush. | |
76 | * | |
77 | * The stream event context will be sampled for every appended event if | |
78 | * a stream event context was defined. | |
79 | * | |
80 | * @param stream Stream instance. | |
81 | * @param event Event instance to append to the stream's current packet. | |
82 | * | |
83 | * Returns 0 on success, a negative value on error. | |
84 | */ | |
85 | extern int bt_ctf_stream_append_event(struct bt_ctf_stream *stream, | |
86 | struct bt_ctf_event *event); | |
87 | ||
88 | /* | |
89 | * bt_ctf_stream_get_packet_header: get a stream's packet header. | |
90 | * | |
91 | * @param stream Stream instance. | |
92 | * | |
93 | * Returns a field instance on success, NULL on error. | |
94 | */ | |
95 | extern struct bt_ctf_field *bt_ctf_stream_get_packet_header( | |
96 | struct bt_ctf_stream *stream); | |
97 | ||
98 | /* | |
99 | * bt_ctf_stream_set_packet_header: set a stream's packet header. | |
100 | * | |
101 | * The packet header's type must match the trace's packet header | |
102 | * type. | |
103 | * | |
104 | * @param stream Stream instance. | |
105 | * @param packet_header Packet header instance. | |
106 | * | |
107 | * Returns a field instance on success, NULL on error. | |
108 | */ | |
109 | extern int bt_ctf_stream_set_packet_header( | |
110 | struct bt_ctf_stream *stream, | |
111 | struct bt_ctf_field *packet_header); | |
112 | ||
113 | /* | |
114 | * bt_ctf_stream_get_packet_context: get a stream's packet context. | |
115 | * | |
116 | * @param stream Stream instance. | |
117 | * | |
118 | * Returns a field instance on success, NULL on error. | |
119 | */ | |
120 | extern struct bt_ctf_field *bt_ctf_stream_get_packet_context( | |
121 | struct bt_ctf_stream *stream); | |
122 | ||
123 | /* | |
124 | * bt_ctf_stream_set_packet_context: set a stream's packet context. | |
125 | * | |
126 | * The packet context's type must match the stream class' packet | |
127 | * context type. | |
128 | * | |
129 | * @param stream Stream instance. | |
130 | * @param packet_context Packet context field instance. | |
131 | * | |
132 | * Returns a field instance on success, NULL on error. | |
133 | */ | |
134 | extern int bt_ctf_stream_set_packet_context( | |
135 | struct bt_ctf_stream *stream, | |
136 | struct bt_ctf_field *packet_context); | |
137 | ||
138 | /* | |
139 | * bt_ctf_stream_flush: flush a stream. | |
140 | * | |
141 | * The stream's current packet's events will be flushed, thus closing the | |
142 | * current packet. Events subsequently appended to the stream will be | |
143 | * added to a new packet. | |
144 | * | |
145 | * Flushing will also set the packet context's default attributes if | |
146 | * they remained unset while populating the current packet. These default | |
147 | * attributes, along with their expected types, are detailed in stream-class.h. | |
148 | * | |
149 | * @param stream Stream instance. | |
150 | * | |
151 | * Returns 0 on success, a negative value on error. | |
152 | */ | |
153 | extern int bt_ctf_stream_flush(struct bt_ctf_stream *stream); | |
154 | ||
98a4cbef PP |
155 | extern int bt_ctf_stream_is_writer(struct bt_ctf_stream *stream); |
156 | ||
8c18d80b PP |
157 | /* |
158 | * bt_ctf_stream_get and bt_ctf_stream_put: increment and decrement the | |
159 | * stream's reference count. | |
160 | * | |
161 | * You may also use bt_ctf_get() and bt_ctf_put() with stream objects. | |
162 | * | |
163 | * These functions ensure that the stream won't be destroyed while it | |
164 | * is in use. The same number of get and put (plus one extra put to | |
165 | * release the initial reference done at creation) have to be done to | |
166 | * destroy a stream. | |
167 | * | |
168 | * When the stream's reference count is decremented to 0 by a | |
169 | * bt_ctf_stream_put, the stream is freed. | |
170 | * | |
171 | * @param stream Stream instance. | |
172 | */ | |
173 | extern void bt_ctf_stream_get(struct bt_ctf_stream *stream); | |
174 | extern void bt_ctf_stream_put(struct bt_ctf_stream *stream); | |
175 | ||
176 | #ifdef __cplusplus | |
177 | } | |
178 | #endif | |
179 | ||
180 | #endif /* BABELTRACE_CTF_WRITER_STREAM_H */ |