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83fe108b | 1 | /* System-dependent timing definitions. Linux version. |
f7a9f785 | 2 | Copyright (C) 1996-2016 Free Software Foundation, Inc. |
83fe108b UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
83fe108b UD |
18 | |
19 | /* | |
20 | * Never include this file directly; use <time.h> instead. | |
21 | */ | |
22 | ||
23 | #if defined __need_timeval || defined __USE_GNU | |
24 | # ifndef _STRUCT_TIMEVAL | |
25 | # define _STRUCT_TIMEVAL 1 | |
26 | # include <bits/types.h> | |
27 | ||
28 | /* A time value that is accurate to the nearest | |
29 | microsecond but also has a range of years. */ | |
30 | struct timeval | |
31 | { | |
32 | __time_t tv_sec; /* Seconds. */ | |
33 | __suseconds_t tv_usec; /* Microseconds. */ | |
34 | }; | |
35 | # endif /* struct timeval */ | |
36 | #endif | |
37 | ||
38 | #ifndef __need_timeval | |
39 | # ifndef _BITS_TIME_H | |
40 | # define _BITS_TIME_H 1 | |
41 | ||
57ada0e7 L |
42 | /* ISO/IEC 9899:1999 7.23.1: Components of time |
43 | The macro `CLOCKS_PER_SEC' is an expression with type `clock_t' that is | |
44 | the number per second of the value returned by the `clock' function. */ | |
83fe108b UD |
45 | /* CAE XSH, Issue 4, Version 2: <time.h> |
46 | The value of CLOCKS_PER_SEC is required to be 1 million on all | |
47 | XSI-conformant systems. */ | |
57ada0e7 | 48 | # define CLOCKS_PER_SEC ((clock_t) 1000000) |
83fe108b | 49 | |
4efeffc1 UD |
50 | # if (!defined __STRICT_ANSI__ || defined __USE_POSIX) \ |
51 | && !defined __USE_XOPEN2K | |
83fe108b UD |
52 | /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK |
53 | presents the real value for clock ticks per second for the system. */ | |
54 | # include <bits/types.h> | |
55 | extern long int __sysconf (int); | |
56 | # define CLK_TCK ((__clock_t) __sysconf (2)) /* 2 is _SC_CLK_TCK */ | |
57 | # endif | |
58 | ||
59 | # ifdef __USE_POSIX199309 | |
60 | /* Identifier for system-wide realtime clock. */ | |
61 | # define CLOCK_REALTIME 0 | |
62 | /* Monotonic system-wide clock. */ | |
63 | # define CLOCK_MONOTONIC 1 | |
64 | /* High-resolution timer from the CPU. */ | |
65 | # define CLOCK_PROCESS_CPUTIME_ID 2 | |
66 | /* Thread-specific CPU-time clock. */ | |
67 | # define CLOCK_THREAD_CPUTIME_ID 3 | |
68 | /* Monotonic system-wide clock, not adjusted for frequency scaling. */ | |
69 | # define CLOCK_MONOTONIC_RAW 4 | |
70 | /* Identifier for system-wide realtime clock, updated only on ticks. */ | |
71 | # define CLOCK_REALTIME_COARSE 5 | |
72 | /* Monotonic system-wide clock, updated only on ticks. */ | |
73 | # define CLOCK_MONOTONIC_COARSE 6 | |
94521213 UD |
74 | /* Monotonic system-wide clock that includes time spent in suspension. */ |
75 | # define CLOCK_BOOTTIME 7 | |
05bb4a68 UD |
76 | /* Like CLOCK_REALTIME but also wakes suspended system. */ |
77 | # define CLOCK_REALTIME_ALARM 8 | |
78 | /* Like CLOCK_BOOTTIME but also wakes suspended system. */ | |
79 | # define CLOCK_BOOTTIME_ALARM 9 | |
e9ff8efb RC |
80 | /* Like CLOCK_REALTIME but in International Atomic Time. */ |
81 | # define CLOCK_TAI 11 | |
83fe108b UD |
82 | |
83 | /* Flag to indicate time is absolute. */ | |
84 | # define TIMER_ABSTIME 1 | |
85 | # endif | |
86 | ||
87 | # ifdef __USE_GNU | |
88 | # include <bits/timex.h> | |
89 | ||
90 | __BEGIN_DECLS | |
91 | ||
92 | /* Tune a POSIX clock. */ | |
93 | extern int clock_adjtime (__clockid_t __clock_id, struct timex *__utx) __THROW; | |
94 | ||
95 | __END_DECLS | |
96 | # endif /* use GNU */ | |
97 | ||
98 | # endif /* bits/time.h */ | |
99 | #endif | |
100 | ||
101 | #undef __need_timeval |