1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)time.h 7.2 (Berkeley) 05/09/89 7 */ 8 9 #ifndef _TIME_ 10 #define _TIME_ 11 12 /* 13 * Structure returned by gettimeofday(2) system call, 14 * and used in other calls. 15 */ 16 struct timeval { 17 long tv_sec; /* seconds */ 18 long tv_usec; /* and microseconds */ 19 }; 20 21 struct timezone { 22 int tz_minuteswest; /* minutes west of Greenwich */ 23 int tz_dsttime; /* type of dst correction */ 24 }; 25 #define DST_NONE 0 /* not on dst */ 26 #define DST_USA 1 /* USA style dst */ 27 #define DST_AUST 2 /* Australian style dst */ 28 #define DST_WET 3 /* Western European dst */ 29 #define DST_MET 4 /* Middle European dst */ 30 #define DST_EET 5 /* Eastern European dst */ 31 #define DST_CAN 6 /* Canada */ 32 33 /* 34 * Operations on timevals. 35 * 36 * NB: timercmp does not work for >= or <=. 37 */ 38 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 39 #define timercmp(tvp, uvp, cmp) \ 40 ((tvp)->tv_sec cmp (uvp)->tv_sec || \ 41 (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec) 42 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 43 44 /* 45 * Names of the interval timers, and structure 46 * defining a timer setting. 47 */ 48 #define ITIMER_REAL 0 49 #define ITIMER_VIRTUAL 1 50 #define ITIMER_PROF 2 51 52 struct itimerval { 53 struct timeval it_interval; /* timer interval */ 54 struct timeval it_value; /* current value */ 55 }; 56 57 #ifndef KERNEL 58 #include <time.h> 59 #endif 60 61 #endif /* _TIME_ */ 62