modernc.org/cc@v1.0.1/v2/headers/linux_arm/usr/include/arm-linux-gnueabihf/bits/time.h (about)

     1  /* System-dependent timing definitions.  Linux version.
     2     Copyright (C) 1996-2016 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  #if defined __need_timeval || defined __USE_GNU
    24  #ifndef _STRUCT_TIMEVAL
    25  #define _STRUCT_TIMEVAL	1
    26  #include <bits/types.h>
    27  
    28  /* A time value that is accurate to the nearest
    29     microsecond but also has a range of years.  */
    30  struct timeval {
    31  	__time_t tv_sec;	/* Seconds.  */
    32  	__suseconds_t tv_usec;	/* Microseconds.  */
    33  };
    34  #endif				/* struct timeval */
    35  #endif
    36  
    37  #ifndef __need_timeval
    38  #ifndef _BITS_TIME_H
    39  #define _BITS_TIME_H	1
    40  
    41  /* ISO/IEC 9899:1999 7.23.1: Components of time
    42     The macro `CLOCKS_PER_SEC' is an expression with type `clock_t' that is
    43     the number per second of the value returned by the `clock' function.  */
    44  /* CAE XSH, Issue 4, Version 2: <time.h>
    45     The value of CLOCKS_PER_SEC is required to be 1 million on all
    46     XSI-conformant systems. */
    47  #define CLOCKS_PER_SEC  ((clock_t) 1000000)
    48  
    49  #if (!defined __STRICT_ANSI__ || defined __USE_POSIX) \
    50     && !defined __USE_XOPEN2K
    51  /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
    52     presents the real value for clock ticks per second for the system.  */
    53  #include <bits/types.h>
    54  extern long int __sysconf(int);
    55  #define CLK_TCK ((__clock_t) __sysconf (2))	/* 2 is _SC_CLK_TCK */
    56  #endif
    57  
    58  #ifdef __USE_POSIX199309
    59  /* Identifier for system-wide realtime clock.  */
    60  #define CLOCK_REALTIME		0
    61  /* Monotonic system-wide clock.  */
    62  #define CLOCK_MONOTONIC		1
    63  /* High-resolution timer from the CPU.  */
    64  #define CLOCK_PROCESS_CPUTIME_ID	2
    65  /* Thread-specific CPU-time clock.  */
    66  #define CLOCK_THREAD_CPUTIME_ID	3
    67  /* Monotonic system-wide clock, not adjusted for frequency scaling.  */
    68  #define CLOCK_MONOTONIC_RAW		4
    69  /* Identifier for system-wide realtime clock, updated only on ticks.  */
    70  #define CLOCK_REALTIME_COARSE	5
    71  /* Monotonic system-wide clock, updated only on ticks.  */
    72  #define CLOCK_MONOTONIC_COARSE	6
    73  /* Monotonic system-wide clock that includes time spent in suspension.  */
    74  #define CLOCK_BOOTTIME		7
    75  /* Like CLOCK_REALTIME but also wakes suspended system.  */
    76  #define CLOCK_REALTIME_ALARM		8
    77  /* Like CLOCK_BOOTTIME but also wakes suspended system.  */
    78  #define CLOCK_BOOTTIME_ALARM		9
    79  /* Like CLOCK_REALTIME but in International Atomic Time.  */
    80  #define CLOCK_TAI			11
    81  
    82  /* Flag to indicate time is absolute.  */
    83  #define TIMER_ABSTIME		1
    84  #endif
    85  
    86  #ifdef __USE_GNU
    87  #include <bits/timex.h>
    88  
    89  __BEGIN_DECLS
    90  /* Tune a POSIX clock.  */
    91  extern int clock_adjtime(__clockid_t __clock_id, struct timex *__utx) __THROW;
    92  
    93  __END_DECLS
    94  #endif				/* use GNU */
    95  #endif				/* bits/time.h */
    96  #endif
    97  #undef __need_timeval