1 /* gethrxtime -- get high resolution real time 2 3 Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc. 4 5 This program is free software: you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program 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 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 17 18 /* Written by Paul Eggert. */ 19 20 #ifndef GETHRXTIME_H_ 21 #define GETHRXTIME_H_ 1 22 23 #include "xtime.h" 24 25 #ifndef _GL_INLINE_HEADER_BEGIN 26 #error "Please include config.h first." 27 #endif 28 _GL_INLINE_HEADER_BEGIN 29 #ifndef GETHRXTIME_INLINE 30 # define GETHRXTIME_INLINE _GL_INLINE 31 #endif 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 /* Get the current time, as a count of the number of nanoseconds since 38 an arbitrary epoch (e.g., the system boot time). Prefer a 39 high-resolution clock that is not subject to resetting or 40 drifting. */ 41 42 #if HAVE_ARITHMETIC_HRTIME_T && HAVE_DECL_GETHRTIME 43 # include <time.h> 44 GETHRXTIME_INLINE xtime_t gethrxtime (void) { return gethrtime (); } /* */ 45 # else 46 xtime_t gethrxtime (void); 47 #endif 48 49 _GL_INLINE_HEADER_END 50 51 #ifdef __cplusplus 52 } 53 #endif 54 55 #endif