1 /* 2 * Copyright (c) 1982 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 6.4 (Berkeley) 06/24/85 7 */ 8 9 /* 10 * Structure returned by gettimeofday(2) system call, 11 * and used in other calls. 12 */ 13 struct timeval { 14 long tv_sec; /* seconds */ 15 long tv_usec; /* and microseconds */ 16 }; 17 18 struct timezone { 19 int tz_minuteswest; /* minutes west of Greenwich */ 20 int tz_dsttime; /* type of dst correction */ 21 }; 22 #define DST_NONE 0 /* not on dst */ 23 #define DST_USA 1 /* USA style dst */ 24 #define DST_AUST 2 /* Australian style dst */ 25 #define DST_WET 3 /* Western European dst */ 26 #define DST_MET 4 /* Middle European dst */ 27 #define DST_EET 5 /* Eastern European dst */ 28 #define DST_CAN 6 /* Canada */ 29 30 /* 31 * Operations on timevals. 32 * 33 * NB: timercmp does not work for >= or <=. 34 */ 35 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 36 #define timercmp(tvp, uvp, cmp) \ 37 ((tvp)->tv_sec cmp (uvp)->tv_sec || \ 38 (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec) 39 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 40 41 /* 42 * Names of the interval timers, and structure 43 * defining a timer setting. 44 */ 45 #define ITIMER_REAL 0 46 #define ITIMER_VIRTUAL 1 47 #define ITIMER_PROF 2 48 49 struct itimerval { 50 struct timeval it_interval; /* timer interval */ 51 struct timeval it_value; /* current value */ 52 }; 53 54 #ifndef KERNEL 55 #include <time.h> 56 #endif 57