1 #ifndef BABELTRACE_CTF_IR_CLOCK_H
2 #define BABELTRACE_CTF_IR_CLOCK_H
5 * BabelTrace - CTF IR: Clock
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
42 * bt_ctf_clock_create: create a clock.
44 * Allocate a new clock setting its reference count to 1.
46 * @param name Name of the clock (will be copied); can be set to NULL
47 * for nameless clocks.
49 * Returns an allocated clock on success, NULL on error.
51 extern struct bt_ctf_clock
*bt_ctf_clock_create(const char *name
);
54 * bt_ctf_clock_get_name: get a clock's name.
56 * Get the clock's name.
58 * @param clock Clock instance.
60 * Returns the clock's name, NULL on error.
62 extern const char *bt_ctf_clock_get_name(struct bt_ctf_clock
*clock
);
65 * bt_ctf_clock_set_name: set a clock's name.
69 * @param name Name of the clock (will be copied).
71 * Returns 0 on success, a negative value on error.
73 extern int bt_ctf_clock_set_name(struct bt_ctf_clock
*clock
, const char *name
);
76 * bt_ctf_clock_get_description: get a clock's description.
78 * Get the clock's description.
80 * @param clock Clock instance.
82 * Returns the clock's description, NULL if unset.
84 extern const char *bt_ctf_clock_get_description(struct bt_ctf_clock
*clock
);
87 * bt_ctf_clock_set_description: set a clock's description.
89 * Set the clock's description. The description appears in the clock's TSDL
92 * @param clock Clock instance.
93 * @param desc Description of the clock.
95 * Returns 0 on success, a negative value on error.
97 extern int bt_ctf_clock_set_description(struct bt_ctf_clock
*clock
,
101 * bt_ctf_clock_get_frequency: get a clock's frequency.
103 * Get the clock's frequency (Hz).
105 * @param clock Clock instance.
107 * Returns the clock's frequency, -1ULL on error.
109 extern uint64_t bt_ctf_clock_get_frequency(struct bt_ctf_clock
*clock
);
112 * bt_ctf_clock_set_frequency: set a clock's frequency.
114 * Set the clock's frequency (Hz).
116 * @param clock Clock instance.
117 * @param freq Clock's frequency in Hz, defaults to 1 000 000 000 Hz (1ns).
119 * Returns 0 on success, a negative value on error.
121 extern int bt_ctf_clock_set_frequency(struct bt_ctf_clock
*clock
,
125 * bt_ctf_clock_get_precision: get a clock's precision.
127 * Get the clock's precision (in clock ticks).
129 * @param clock Clock instance.
131 * Returns the clock's precision, -1ULL on error.
133 extern uint64_t bt_ctf_clock_get_precision(struct bt_ctf_clock
*clock
);
136 * bt_ctf_clock_set_precision: set a clock's precision.
138 * Set the clock's precision.
140 * @param clock Clock instance.
141 * @param precision Clock's precision in clock ticks, defaults to 1.
143 * Returns 0 on success, a negative value on error.
145 extern int bt_ctf_clock_set_precision(struct bt_ctf_clock
*clock
,
149 * bt_ctf_clock_get_offset_s: get a clock's offset in seconds.
151 * Get the clock's offset in seconds from POSIX.1 Epoch, 1970-01-01.
153 * @param clock Clock instance.
154 * @param offset_s Pointer to clock offset in seconds (output).
156 * Returns 0 on success, a negative value on error.
158 extern int bt_ctf_clock_get_offset_s(struct bt_ctf_clock
*clock
,
162 * bt_ctf_clock_set_offset_s: set a clock's offset in seconds.
164 * Set the clock's offset in seconds from POSIX.1 Epoch, 1970-01-01,
167 * @param clock Clock instance.
168 * @param offset_s Clock's offset in seconds, defaults to 0.
170 * Returns 0 on success, a negative value on error.
172 extern int bt_ctf_clock_set_offset_s(struct bt_ctf_clock
*clock
,
176 * bt_ctf_clock_get_offset: get a clock's offset in ticks.
178 * Get the clock's offset in ticks from Epoch + offset_t.
180 * @param clock Clock instance.
181 * @param offset Clock offset in ticks from Epoch + offset_s (output).
183 * Returns 0 on success, a negative value on error.
185 extern int bt_ctf_clock_get_offset(struct bt_ctf_clock
*clock
,
189 * bt_ctf_clock_set_offset: set a clock's offset in ticks.
191 * Set the clock's offset in ticks from Epoch + offset_s.
193 * @param clock Clock instance.
194 * @param offset Clock's offset in ticks from Epoch + offset_s, defaults to 0.
196 * Returns 0 on success, a negative value on error.
198 extern int bt_ctf_clock_set_offset(struct bt_ctf_clock
*clock
,
202 * bt_ctf_clock_get_is_absolute: get a clock's absolute attribute.
204 * Get the clock's absolute attribute. A clock is absolute if the clock is a
205 * global reference across the trace's other clocks.
207 * @param clock Clock instance.
209 * Returns the clock's absolute attribute, a negative value on error.
211 extern int bt_ctf_clock_get_is_absolute(struct bt_ctf_clock
*clock
);
214 * bt_ctf_clock_set_is_absolute: set a clock's absolute attribute.
216 * Set the clock's absolute attribute. A clock is absolute if the clock is a
217 * global reference across the trace's other clocks.
219 * @param clock Clock instance.
220 * @param is_absolute Clock's absolute attribute, defaults to FALSE.
222 * Returns 0 on success, a negative value on error.
224 extern int bt_ctf_clock_set_is_absolute(struct bt_ctf_clock
*clock
,
228 * bt_ctf_clock_get_uuid: get a clock's UUID.
230 * Get the clock's UUID.
232 * @param clock Clock instance.
234 * Returns a pointer to the clock's UUID (16 byte array) on success,
237 extern const unsigned char *bt_ctf_clock_get_uuid(struct bt_ctf_clock
*clock
);
240 * bt_ctf_clock_set_uuid: set a clock's UUID.
242 * Set a clock's UUID.
244 * @param clock Clock instance.
245 * @param uuid A 16-byte array containing a UUID.
247 * Returns 0 on success, a negative value on error.
249 extern int bt_ctf_clock_set_uuid(struct bt_ctf_clock
*clock
,
250 const unsigned char *uuid
);
252 extern int64_t bt_ctf_clock_ns_from_value(struct bt_ctf_clock
*clock
,
259 #endif /* BABELTRACE_CTF_IR_CLOCK_H */
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