1 #ifndef BABELTRACE_CTF_WRITER_STREAM_H
2 #define BABELTRACE_CTF_WRITER_STREAM_H
5 * BabelTrace - CTF Writer: Stream
7 * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
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:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
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
29 * The Common Trace Format (CTF) Specification is available at
30 * http://www.efficios.com/ctf
43 * bt_ctf_stream_get_discarded_events_count: get the number of discarded
44 * events associated with this stream.
46 * Note that discarded events are not stored if the stream's packet
47 * context has no "events_discarded" field. An error will be returned
50 * @param stream Stream instance.
52 * Returns the number of discarded events, a negative value on error.
54 extern int bt_ctf_stream_get_discarded_events_count(
55 struct bt_ctf_stream
*stream
, uint64_t *count
);
58 * bt_ctf_stream_append_discarded_events: increment discarded events count.
60 * Increase the current packet's discarded event count. Has no effect if the
61 * stream class' packet context has no "events_discarded" field.
63 * @param stream Stream instance.
64 * @param event_count Number of discarded events to add to the stream's current
67 extern void bt_ctf_stream_append_discarded_events(struct bt_ctf_stream
*stream
,
68 uint64_t event_count
);
71 * bt_ctf_stream_append_event: append an event to the stream.
73 * Append "event" to the stream's current packet. The stream's associated clock
74 * will be sampled during this call. The event shall not be modified after
75 * being appended to a stream. The stream will share the event's ownership by
76 * incrementing its reference count. The current packet is not flushed to disk
77 * until the next call to bt_ctf_stream_flush.
79 * The stream event context will be sampled for every appended event if
80 * a stream event context was defined.
82 * @param stream Stream instance.
83 * @param event Event instance to append to the stream's current packet.
85 * Returns 0 on success, a negative value on error.
87 extern int bt_ctf_stream_append_event(struct bt_ctf_stream
*stream
,
88 struct bt_ctf_event
*event
);
91 * bt_ctf_stream_get_packet_header: get a stream's packet header.
93 * @param stream Stream instance.
95 * Returns a field instance on success, NULL on error.
97 extern struct bt_ctf_field
*bt_ctf_stream_get_packet_header(
98 struct bt_ctf_stream
*stream
);
101 * bt_ctf_stream_set_packet_header: set a stream's packet header.
103 * The packet header's type must match the trace's packet header
106 * @param stream Stream instance.
107 * @param packet_header Packet header instance.
109 * Returns a field instance on success, NULL on error.
111 extern int bt_ctf_stream_set_packet_header(
112 struct bt_ctf_stream
*stream
,
113 struct bt_ctf_field
*packet_header
);
116 * bt_ctf_stream_get_packet_context: get a stream's packet context.
118 * @param stream Stream instance.
120 * Returns a field instance on success, NULL on error.
122 extern struct bt_ctf_field
*bt_ctf_stream_get_packet_context(
123 struct bt_ctf_stream
*stream
);
126 * bt_ctf_stream_set_packet_context: set a stream's packet context.
128 * The packet context's type must match the stream class' packet
131 * @param stream Stream instance.
132 * @param packet_context Packet context field instance.
134 * Returns a field instance on success, NULL on error.
136 extern int bt_ctf_stream_set_packet_context(
137 struct bt_ctf_stream
*stream
,
138 struct bt_ctf_field
*packet_context
);
141 * bt_ctf_stream_flush: flush a stream.
143 * The stream's current packet's events will be flushed, thus closing the
144 * current packet. Events subsequently appended to the stream will be
145 * added to a new packet.
147 * Flushing will also set the packet context's default attributes if
148 * they remained unset while populating the current packet. These default
149 * attributes, along with their expected types, are detailed in stream-class.h.
151 * @param stream Stream instance.
153 * Returns 0 on success, a negative value on error.
155 extern int bt_ctf_stream_flush(struct bt_ctf_stream
*stream
);
157 extern int bt_ctf_stream_is_writer(struct bt_ctf_stream
*stream
);
160 struct bt_ctf_stream
*bt_ctf_stream_create(
161 struct bt_ctf_stream_class
*stream_class
,
162 const char *name
, uint64_t id
);
164 extern struct bt_ctf_stream_class
*bt_ctf_stream_get_class(
165 struct bt_ctf_stream
*stream
);
167 extern const char *bt_ctf_stream_get_name(struct bt_ctf_stream
*stream
);
169 extern int64_t bt_ctf_stream_get_id(struct bt_ctf_stream
*stream
);
171 /* Pre-2.0 CTF writer compatibility */
173 void bt_ctf_stream_get(struct bt_ctf_stream
*stream
)
178 /* Pre-2.0 CTF writer compatibility */
180 void bt_ctf_stream_put(struct bt_ctf_stream
*stream
)
189 #endif /* BABELTRACE_CTF_WRITER_STREAM_H */
This page took 0.032255 seconds and 4 git commands to generate.