| /* System-dependent timing definitions. Generic version. |
| Copyright (C) 1996-2018 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. |
| */ |
| |
| #ifndef _BITS_TIME_H |
| #define _BITS_TIME_H 1 |
| |
| #include <bits/types.h> |
| |
| /* ISO/IEC 9899:1999 7.23.1: Components of time |
| The macro `CLOCKS_PER_SEC' is an expression with type `clock_t' that 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 ((__clock_t) 1000000) |
| |
| #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. */ |
| 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 |
| |
| /* Flag to indicate time is absolute. */ |
| # define TIMER_ABSTIME 1 |
| #endif |
| |
| #endif /* bits/time.h */ |
