projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| ded1a808 MD |
1 | #ifndef LTTNG_UST_CLOCK_H |
| 2 | #define LTTNG_UST_CLOCK_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 6 | * | |
| 7 | * This library is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; version 2.1 of | |
| 10 | * the License. | |
| 11 | * | |
| 12 | * This library is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with this library; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include <stdint.h> | |
| 23 | #include <stddef.h> | |
| 24 | ||
| 25 | /* | |
| 26 | * Set each callback for the trace clock override, and then enable the | |
| 27 | * override. Those functions return negative error values on error, 0 on | |
| 28 | * success. | |
| 29 | */ | |
| 30 | ||
| 31 | /* | |
| 32 | * Set clock override read callback. This callback should return the | |
| 33 | * current clock time (a 64-bit monotonic counter). | |
| 34 | */ | |
| 35 | int lttng_ust_trace_clock_set_read64_cb(uint64_t (*read64)(void)); | |
| 36 | ||
| 37 | /* | |
| 38 | * Set clock override frequency callback. This callback should return | |
| 39 | * the frequency of the clock in cycles per second. | |
| 40 | */ | |
| 41 | int lttng_ust_trace_clock_set_freq_cb(uint64_t (*freq)(void)); | |
| 42 | ||
| 43 | /* | |
| 44 | * Set clock override unique identifier. | |
| 45 | * LTTNG_UST_UUID_STR_LEN is the maximum length of uuid string. Includes | |
| 46 | * final \0. | |
| 47 | */ | |
| 48 | #define LTTNG_UST_UUID_STR_LEN 37 | |
| 49 | ||
| 50 | int lttng_ust_trace_clock_set_uuid_cb(int (*uuid)(char *uuid)); | |
| 51 | ||
| 52 | /* | |
| 53 | * Set clock override name. | |
| 54 | */ | |
| 55 | int lttng_ust_trace_clock_set_name_cb(const char *(*name)(void)); | |
| 56 | ||
| 57 | /* | |
| 58 | * Set clock override description. | |
| 59 | */ | |
| 60 | int lttng_ust_trace_clock_set_description_cb(const char *(*description)(void)); | |
| 61 | ||
| 62 | /* | |
| 63 | * Use the clock override rather than the default clock. | |
| 64 | */ | |
| 65 | int lttng_ust_enable_trace_clock_override(void); | |
| 66 | ||
| 67 | #endif /* LTTNG_UST_CLOCK_H */ |