/* 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 /* Like CLOCK_REALTIME but in International Atomic Time. */ # define CLOCK_TAI 11 /* 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