1 /* 2 * Copyright (c) 1982, 1986 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)time.h 7.7 (Berkeley) 03/09/92 8 */ 9 10 #ifndef _SYS_TIME_H_ 11 #define _SYS_TIME_H_ 12 13 /* 14 * Structure returned by gettimeofday(2) system call, 15 * and used in other calls. 16 */ 17 struct timeval { 18 long tv_sec; /* seconds */ 19 long tv_usec; /* and microseconds */ 20 }; 21 22 struct timezone { 23 int tz_minuteswest; /* minutes west of Greenwich */ 24 int tz_dsttime; /* type of dst correction */ 25 }; 26 #define DST_NONE 0 /* not on dst */ 27 #define DST_USA 1 /* USA style dst */ 28 #define DST_AUST 2 /* Australian style dst */ 29 #define DST_WET 3 /* Western European dst */ 30 #define DST_MET 4 /* Middle European dst */ 31 #define DST_EET 5 /* Eastern European dst */ 32 #define DST_CAN 6 /* Canada */ 33 34 /* 35 * Operations on timevals. 36 * 37 * NB: timercmp does not work for >= or <=. 38 */ 39 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 40 #define timercmp(tvp, uvp, cmp) \ 41 ((tvp)->tv_sec cmp (uvp)->tv_sec || \ 42 (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec) 43 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 44 45 /* 46 * Names of the interval timers, and structure 47 * defining a timer setting. 48 */ 49 #define ITIMER_REAL 0 50 #define ITIMER_VIRTUAL 1 51 #define ITIMER_PROF 2 52 53 struct itimerval { 54 struct timeval it_interval; /* timer interval */ 55 struct timeval it_value; /* current value */ 56 }; 57 58 /* 59 * Getkerninfo clock information structure 60 */ 61 struct clockinfo { 62 int hz; /* clock frequency */ 63 int tick; /* micro-seconds per hz tick */ 64 int phz; /* alternate clock frequency */ 65 int profhz; /* profiling clock frequency */ 66 }; 67 68 #ifndef KERNEL 69 #include <time.h> 70 71 #ifndef _POSIX_SOURCE 72 #include <sys/cdefs.h> 73 74 __BEGIN_DECLS 75 int adjtime __P((const struct timeval *, struct timeval *)); 76 int getitimer __P((int, struct itimerval *)); 77 int gettimeofday __P((struct timeval *, struct timezone *)); 78 int setitimer __P((int, const struct itimerval *, struct itimerval *)); 79 int settimeofday __P((const struct timeval *, const struct timezone *)); 80 int utimes __P((const char *, const struct timeval *)); 81 __END_DECLS 82 #endif /* !POSIX */ 83 84 #endif /* !KERNEL */ 85 86 #endif /* !_SYS_TIME_H_ */ 87