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| Current File : //usr/include/bits/time.h |
/* System-dependent timing definitions. Linux version.
Copyright (C) 1996,1997,1999-2003,2010,2011,2012 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
<http://www.gnu.org/licenses/>. */
/*
* Never include this file directly; use <time.h> instead.
*/
#if defined __need_timeval || defined __USE_GNU
# ifndef _STRUCT_TIMEVAL
# define _STRUCT_TIMEVAL 1
# include <bits/types.h>
/* A time value that is accurate to the nearest
microsecond but also has a range of years. */
struct timeval
{
__time_t tv_sec; /* Seconds. */
__suseconds_t tv_usec; /* Microseconds. */
};
# endif /* struct timeval */
#endif
#ifndef __need_timeval
# ifndef _BITS_TIME_H
# define _BITS_TIME_H 1
/* ISO/IEC 9899:1990 7.12.1: <time.h>
The macro `CLOCKS_PER_SEC' 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 1000000l
# 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. */
# include <bits/types.h>
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 */
#endif
#undef __need_timeval