modernc.org/cc@v1.0.1/v2/headers/linux_386/usr/include/i386-linux-gnu/bits/time.h (about)

     1  /* System-dependent timing definitions.  Linux version.
     2     Copyright (C) 1996-2018 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, see
    17     <http://www.gnu.org/licenses/>.  */
    18  
    19  /*
    20   * Never include this file directly; use <time.h> instead.
    21   */
    22  
    23  #ifndef _BITS_TIME_H
    24  #define _BITS_TIME_H	1
    25  
    26  #include <bits/types.h>
    27  
    28  /* ISO/IEC 9899:1999 7.23.1: Components of time
    29     The macro `CLOCKS_PER_SEC' is an expression with type `clock_t' that is
    30     the number per second of the value 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  ((__clock_t) 1000000)
    35  
    36  #if (!defined __STRICT_ANSI__ || defined __USE_POSIX) \
    37     && !defined __USE_XOPEN2K
    38  /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
    39     presents the real value for clock ticks per second for the system.  */
    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  /* Monotonic system-wide clock that includes time spent in suspension.  */
    60  # define CLOCK_BOOTTIME			7
    61  /* Like CLOCK_REALTIME but also wakes suspended system.  */
    62  # define CLOCK_REALTIME_ALARM		8
    63  /* Like CLOCK_BOOTTIME but also wakes suspended system.  */
    64  # define CLOCK_BOOTTIME_ALARM		9
    65  /* Like CLOCK_REALTIME but in International Atomic Time.  */
    66  # define CLOCK_TAI			11
    67  
    68  /* Flag to indicate time is absolute.  */
    69  # define TIMER_ABSTIME			1
    70  #endif
    71  
    72  #ifdef __USE_GNU
    73  # include <bits/timex.h>
    74  
    75  __BEGIN_DECLS
    76  /* Tune a POSIX clock.  */
    77  extern int clock_adjtime(__clockid_t __clock_id, struct timex *__utx) __THROW;
    78  
    79  __END_DECLS
    80  #endif				/* use GNU */
    81  #endif				/* bits/time.h */