1 /* System-dependent timing definitions. Generic version.
2 Copyright (C) 1996,1997,1999-2002,2003,2010 Free Software Foundation, Inc.
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
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20 /*
21 * Never include this file directly; use <time.h> instead.
22 */
23
24 #ifndef __need_timeval
25 # ifndef _BITS_TIME_H
26 # define _BITS_TIME_H 1
27
28 /* ISO/IEC 9899:1990 7.12.1: <time.h>
29 The macro `CLOCKS_PER_SEC' is the number per second of the value
30 returned by the `clock' function. */
31 /* CAE XSH, Issue 4, Version 2: <time.h>
32 The value of CLOCKS_PER_SEC is required to be 1 million on all
33 XSI-conformant systems. */
34 # define CLOCKS_PER_SEC 1000000l
35
36 # if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
37 /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
38 presents the real value for clock ticks per second for the system. */
39 # include <bits/types.h>
40 extern long int __sysconf (int);
41 # define CLK_TCK ((__clock_t) __sysconf (2)) /* 2 is _SC_CLK_TCK */
42 # endif
43
44 # ifdef __USE_POSIX199309
45 /* Identifier for system-wide realtime clock. */
46 # define CLOCK_REALTIME 0
47 /* Monotonic system-wide clock. */
48 # define CLOCK_MONOTONIC 1
49 /* High-resolution timer from the CPU. */
50 # define CLOCK_PROCESS_CPUTIME_ID 2
51 /* Thread-specific CPU-time clock. */
52 # define CLOCK_THREAD_CPUTIME_ID 3
53 /* Monotonic system-wide clock, not adjusted for frequency scaling. */
54 # define CLOCK_MONOTONIC_RAW 4
55 /* Identifier for system-wide realtime clock, updated only on ticks. */
56 # define CLOCK_REALTIME_COARSE 5
57 /* Monotonic system-wide clock, updated only on ticks. */
58 # define CLOCK_MONOTONIC_COARSE 6
59
60 /* Flag to indicate time is absolute. */
61 # define TIMER_ABSTIME 1
62 # endif
63
64 # endif /* bits/time.h */
65 #endif
66
67 #ifdef __need_timeval
68 # undef __need_timeval
69 # ifndef _STRUCT_TIMEVAL
70 # define _STRUCT_TIMEVAL 1
71 # include <bits/types.h>
72
73 /* A time value that is accurate to the nearest
74 microsecond but also has a range of years. */
75 struct timeval
76 {
77 __time_t tv_sec; /* Seconds. */
78 __suseconds_t tv_usec; /* Microseconds. */
79 };
80 # endif /* struct timeval */
81 #endif /* need timeval */
82