Commit | Line | Data |
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ded1a808 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
ded1a808 | 3 | * |
c0c0989a | 4 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
ded1a808 MD |
5 | */ |
6 | ||
c0c0989a MJ |
7 | #ifndef LTTNG_UST_CLOCK_H |
8 | #define LTTNG_UST_CLOCK_H | |
9 | ||
ded1a808 MD |
10 | #include <stdint.h> |
11 | #include <stddef.h> | |
12 | ||
13 | /* | |
14 | * Set each callback for the trace clock override, and then enable the | |
15 | * override. Those functions return negative error values on error, 0 on | |
16 | * success. | |
17 | */ | |
18 | ||
19 | /* | |
20 | * Set clock override read callback. This callback should return the | |
21 | * current clock time (a 64-bit monotonic counter). | |
22 | */ | |
23 | int lttng_ust_trace_clock_set_read64_cb(uint64_t (*read64)(void)); | |
24 | ||
25 | /* | |
26 | * Set clock override frequency callback. This callback should return | |
27 | * the frequency of the clock in cycles per second. | |
28 | */ | |
29 | int lttng_ust_trace_clock_set_freq_cb(uint64_t (*freq)(void)); | |
30 | ||
31 | /* | |
32 | * Set clock override unique identifier. | |
33 | * LTTNG_UST_UUID_STR_LEN is the maximum length of uuid string. Includes | |
34 | * final \0. | |
35 | */ | |
36 | #define LTTNG_UST_UUID_STR_LEN 37 | |
37 | ||
38 | int lttng_ust_trace_clock_set_uuid_cb(int (*uuid)(char *uuid)); | |
39 | ||
40 | /* | |
41 | * Set clock override name. | |
42 | */ | |
43 | int lttng_ust_trace_clock_set_name_cb(const char *(*name)(void)); | |
44 | ||
45 | /* | |
46 | * Set clock override description. | |
47 | */ | |
48 | int lttng_ust_trace_clock_set_description_cb(const char *(*description)(void)); | |
49 | ||
50 | /* | |
51 | * Use the clock override rather than the default clock. | |
52 | */ | |
53 | int lttng_ust_enable_trace_clock_override(void); | |
54 | ||
55 | #endif /* LTTNG_UST_CLOCK_H */ |