1 /*
2 * SysDB - src/include/core/time.h
3 * Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #ifndef SDB_CORE_TIME_H
29 #define SDB_CORE_TIME_H 1
31 #include <inttypes.h>
32 #include <stdint.h>
33 #include <stddef.h>
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
39 /*
40 * sdb_time_t:
41 * The time, in nano-seconds, since the epoch.
42 */
43 typedef uint64_t sdb_time_t;
44 #define PRIscTIME PRIu64
46 #define SECS_TO_SDB_TIME(s) ((sdb_time_t)(s) * (sdb_time_t)1000000000)
47 #define SDB_TIME_TO_SECS(t) ((t) / (sdb_time_t)1000000000)
49 #define NSECS_TO_SDB_TIME(ns) ((sdb_time_t)ns)
51 #define DOUBLE_TO_SDB_TIME(d) ((sdb_time_t)((d) * 1000000000.0))
52 #define SDB_TIME_TO_DOUBLE(t) ((double)(t) / 1000000000.0)
54 #define TIMESPEC_TO_SDB_TIME(ts) (SECS_TO_SDB_TIME((ts).tv_sec) \
55 + NSECS_TO_SDB_TIME((ts).tv_nsec))
57 sdb_time_t
58 sdb_gettime(void);
60 int
61 sdb_sleep(sdb_time_t reg, sdb_time_t *rem);
63 size_t
64 sdb_strftime(char *s, size_t len, const char *format, sdb_time_t);
66 #ifdef __cplusplus
67 } /* extern "C" */
68 #endif
70 #endif /* ! SDB_CORE_TIME_H */
72 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */