text: /* 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
  
  /* 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
  