1 /* System-dependent timing definitions. Linux version. 2 Copyright (C) 1996-2014 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 __need_timeval 24 # ifndef _BITS_TIME_H 25 # define _BITS_TIME_H 1 26 27 /* ISO/IEC 9899:1990 7.12.1: <time.h> 28 The macro `CLOCKS_PER_SEC' is the number per second of the value 29 returned by the `clock' function. */ 30 /* CAE XSH, Issue 4, Version 2: <time.h> 31 The value of CLOCKS_PER_SEC is required to be 1 million on all 32 XSI-conformant systems. */ 33 # define CLOCKS_PER_SEC 1000000l 34 35 /* Get the arch-specific value of __UCLIBC_CLK_TCK_CONST used for CLK_TCK 36 * in sysconf() and clock(). */ 37 #include <bits/uClibc_clk_tck.h> 38 39 # if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K 40 /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK 41 presents the real value for clock ticks per second for the system. */ 42 # include <bits/types.h> 43 /* Note (uClibc): glibc #defines CLK_TCK as a sysconf() call. */ 44 # define CLK_TCK ((__clock_t) __UCLIBC_CLK_TCK_CONST) 45 # endif 46 47 # ifdef __USE_POSIX199309 48 /* Identifier for system-wide realtime clock. */ 49 # define CLOCK_REALTIME 0 50 /* Monotonic system-wide clock. */ 51 # define CLOCK_MONOTONIC 1 52 /* High-resolution timer from the CPU. */ 53 # define CLOCK_PROCESS_CPUTIME_ID 2 54 /* Thread-specific CPU-time clock. */ 55 # define CLOCK_THREAD_CPUTIME_ID 3 56 /* Monotonic system-wide clock, not adjusted for frequency scaling. */ 57 # define CLOCK_MONOTONIC_RAW 4 58 /* Identifier for system-wide realtime clock, updated only on ticks. */ 59 # define CLOCK_REALTIME_COARSE 5 60 /* Monotonic system-wide clock, updated only on ticks. */ 61 # define CLOCK_MONOTONIC_COARSE 6 62 /* Monotonic system-wide clock that includes time spent in suspension. */ 63 # define CLOCK_BOOTTIME 7 64 /* Like CLOCK_REALTIME but also wakes suspended system. */ 65 # define CLOCK_REALTIME_ALARM 8 66 /* Like CLOCK_BOOTTIME but also wakes suspended system. */ 67 # define CLOCK_BOOTTIME_ALARM 9 68 /* Like CLOCK_REALTIME but in International Atomic Time. */ 69 # define CLOCK_TAI 11 70 71 /* Flag to indicate time is absolute. */ 72 # define TIMER_ABSTIME 1 73 # endif 74 75 # endif /* bits/time.h */ 76 #endif 77 78 #ifdef __need_timeval 79 # undef __need_timeval 80 # ifndef _STRUCT_TIMEVAL 81 # define _STRUCT_TIMEVAL 1 82 # include <bits/types.h> 83 84 /* A time value that is accurate to the nearest 85 microsecond but also has a range of years. */ 86 struct timeval 87 { 88 __time_t tv_sec; /* Seconds. */ 89 __suseconds_t tv_usec; /* Microseconds. */ 90 }; 91 # endif /* struct timeval */ 92 #endif /* need timeval */ 93