1 /* timespec -- System time interface 2 3 Copyright (C) 2000, 2002, 2004, 2005 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 2, or (at your option) 8 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, write to the Free Software Foundation, 17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 18 19 #if ! defined TIMESPEC_H 20 # define TIMESPEC_H 21 22 # include <sys/types.h> 23 # if TIME_WITH_SYS_TIME 24 # include <sys/time.h> 25 # include <time.h> 26 # else 27 # if HAVE_SYS_TIME_H 28 # include <sys/time.h> 29 # else 30 # include <time.h> 31 # endif 32 # endif 33 34 # if ! HAVE_STRUCT_TIMESPEC 35 /* Some systems don't define this struct, e.g., AIX 4.1, Ultrix 4.3. */ 36 struct timespec 37 { 38 time_t tv_sec; 39 long tv_nsec; 40 }; 41 # endif 42 43 /* Return negative, zero, positive if A < B, A == B, A > B, respectively. 44 Assume the nanosecond components are in range, or close to it. */ 45 static inline int 46 timespec_cmp (struct timespec a, struct timespec b) 47 { 48 return (a.tv_sec < b.tv_sec ? -1 49 : a.tv_sec > b.tv_sec ? 1 50 : a.tv_nsec - b.tv_nsec); 51 } 52 53 # if ! HAVE_DECL_NANOSLEEP 54 /* Don't specify a prototype here. Some systems (e.g., OSF) declare 55 nanosleep with a conflicting one (const-less first parameter). */ 56 int nanosleep (); 57 # endif 58 59 void gettime (struct timespec *); 60 int settime (struct timespec const *); 61 62 #endif 63