You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.9 KiB
84 lines
2.9 KiB
3 years ago
|
/* System-dependent timing definitions. Linux version.
|
||
|
|
Copyright (C) 1996-2021 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Never include this file directly; use <time.h> instead.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _BITS_TIME_H
|
||
|
|
#define _BITS_TIME_H 1
|
||
|
|
|
||
|
|
#include <bits/types.h>
|
||
|
|
|
||
|
|
/* ISO/IEC 9899:1999 7.23.1: Components of time
|
||
|
|
The macro `CLOCKS_PER_SEC' is an expression with type `clock_t' that is
|
||
|
|
the number per second of the value returned by the `clock' function. */
|
||
|
|
/* CAE XSH, Issue 4, Version 2: <time.h>
|
||
|
|
The value of CLOCKS_PER_SEC is required to be 1 million on all
|
||
|
|
XSI-conformant systems. */
|
||
|
|
#define CLOCKS_PER_SEC ((__clock_t) 1000000)
|
||
|
|
|
||
|
|
#if (!defined __STRICT_ANSI__ || defined __USE_POSIX) \
|
||
|
|
&& !defined __USE_XOPEN2K
|
||
|
|
/* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
|
||
|
|
presents the real value for clock ticks per second for the system. */
|
||
|
|
extern long int __sysconf (int);
|
||
|
|
# define CLK_TCK ((__clock_t) __sysconf (2)) /* 2 is _SC_CLK_TCK */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_POSIX199309
|
||
|
|
/* Identifier for system-wide realtime clock. */
|
||
|
|
# define CLOCK_REALTIME 0
|
||
|
|
/* Monotonic system-wide clock. */
|
||
|
|
# define CLOCK_MONOTONIC 1
|
||
|
|
/* High-resolution timer from the CPU. */
|
||
|
|
# define CLOCK_PROCESS_CPUTIME_ID 2
|
||
|
|
/* Thread-specific CPU-time clock. */
|
||
|
|
# define CLOCK_THREAD_CPUTIME_ID 3
|
||
|
|
/* Monotonic system-wide clock, not adjusted for frequency scaling. */
|
||
|
|
# define CLOCK_MONOTONIC_RAW 4
|
||
|
|
/* Identifier for system-wide realtime clock, updated only on ticks. */
|
||
|
|
# define CLOCK_REALTIME_COARSE 5
|
||
|
|
/* Monotonic system-wide clock, updated only on ticks. */
|
||
|
|
# define CLOCK_MONOTONIC_COARSE 6
|
||
|
|
/* Monotonic system-wide clock that includes time spent in suspension. */
|
||
|
|
# define CLOCK_BOOTTIME 7
|
||
|
|
/* Like CLOCK_REALTIME but also wakes suspended system. */
|
||
|
|
# define CLOCK_REALTIME_ALARM 8
|
||
|
|
/* Like CLOCK_BOOTTIME but also wakes suspended system. */
|
||
|
|
# define CLOCK_BOOTTIME_ALARM 9
|
||
|
|
/* Like CLOCK_REALTIME but in International Atomic Time. */
|
||
|
|
# define CLOCK_TAI 11
|
||
|
|
|
||
|
|
/* Flag to indicate time is absolute. */
|
||
|
|
# define TIMER_ABSTIME 1
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_GNU
|
||
|
|
# include <bits/timex.h>
|
||
|
|
|
||
|
|
__BEGIN_DECLS
|
||
|
|
|
||
|
|
/* Tune a POSIX clock. */
|
||
|
|
extern int clock_adjtime (__clockid_t __clock_id, struct timex *__utx) __THROW;
|
||
|
|
|
||
|
|
__END_DECLS
|
||
|
|
#endif /* use GNU */
|
||
|
|
|
||
|
|
#endif /* bits/time.h */
|