1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)time.h 8.1 (Berkeley) 06/02/93 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 /* 23 * Structure defined by POSIX.4 to be like a timeval. 24 */ 25 struct timespec { 26 long ts_sec; /* seconds */ 27 long ts_nsec; /* and nanoseconds */ 28 }; 29 30 #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ 31 (ts)->ts_sec = (tv)->tv_sec; \ 32 (ts)->ts_nsec = (tv)->tv_usec * 1000; \ 33 } 34 #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ 35 (tv)->tv_sec = (ts)->ts_sec; \ 36 (tv)->tv_usec = (ts)->ts_nsec / 1000; \ 37 } 38 39 struct timezone { 40 int tz_minuteswest; /* minutes west of Greenwich */ 41 int tz_dsttime; /* type of dst correction */ 42 }; 43 #define DST_NONE 0 /* not on dst */ 44 #define DST_USA 1 /* USA style dst */ 45 #define DST_AUST 2 /* Australian style dst */ 46 #define DST_WET 3 /* Western European dst */ 47 #define DST_MET 4 /* Middle European dst */ 48 #define DST_EET 5 /* Eastern European dst */ 49 #define DST_CAN 6 /* Canada */ 50 51 /* Operations on timevals. */ 52 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 53 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 54 #define timercmp(tvp, uvp, cmp) \ 55 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 56 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 57 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 58 59 /* 60 * Names of the interval timers, and structure 61 * defining a timer setting. 62 */ 63 #define ITIMER_REAL 0 64 #define ITIMER_VIRTUAL 1 65 #define ITIMER_PROF 2 66 67 struct itimerval { 68 struct timeval it_interval; /* timer interval */ 69 struct timeval it_value; /* current value */ 70 }; 71 72 /* 73 * Getkerninfo clock information structure 74 */ 75 struct clockinfo { 76 int hz; /* clock frequency */ 77 int tick; /* micro-seconds per hz tick */ 78 int stathz; /* statistics clock frequency */ 79 int profhz; /* profiling clock frequency */ 80 }; 81 82 #ifndef KERNEL 83 #include <time.h> 84 85 #ifndef _POSIX_SOURCE 86 #include <sys/cdefs.h> 87 88 __BEGIN_DECLS 89 int adjtime __P((const struct timeval *, struct timeval *)); 90 int getitimer __P((int, struct itimerval *)); 91 int gettimeofday __P((struct timeval *, struct timezone *)); 92 int setitimer __P((int, const struct itimerval *, struct itimerval *)); 93 int settimeofday __P((const struct timeval *, const struct timezone *)); 94 int utimes __P((const char *, const struct timeval *)); 95 __END_DECLS 96 #endif /* !POSIX */ 97 98 #endif /* !KERNEL */ 99 100 #endif /* !_SYS_TIME_H_ */ 101