1: /* System-dependent timing definitions.  Generic version.
    2:    Copyright (C) 1996,1997,1999-2002,2003 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: 
   54: /* Flag to indicate time is absolute.  */
   55: #   define TIMER_ABSTIME                1
   56: #  endif
   57: 
   58: # endif /* bits/time.h */
   59: #endif
   60: 
   61: #ifdef __need_timeval
   62: # undef __need_timeval
   63: # ifndef _STRUCT_TIMEVAL
   64: #  define _STRUCT_TIMEVAL       1
   65: #  include <bits/types.h>
   66: 
   67: /* A time value that is accurate to the nearest
   68:    microsecond but also has a range of years.  */
   69: struct timeval
   70:   {
   71:     __time_t tv_sec;            /* Seconds.  */
   72:     __suseconds_t tv_usec;      /* Microseconds.  */
   73:   };
   74: # endif /* struct timeval */
   75: #endif  /* need timeval */