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 8.2 (Berkeley) 07/10/94 8 */ 9 10 #ifndef _SYS_TIME_H_ 11 #define _SYS_TIME_H_ 12 13 #include <sys/types.h> 14 15 /* 16 * Structure returned by gettimeofday(2) system call, 17 * and used in other calls. 18 */ 19 struct timeval { 20 int32_t tv_sec; /* seconds */ 21 int32_t tv_usec; /* and microseconds */ 22 }; 23 24 /* 25 * Structure defined by POSIX.4 to be like a timeval. 26 */ 27 struct timespec { 28 int32_t ts_sec; /* seconds */ 29 int32_t ts_nsec; /* and nanoseconds */ 30 }; 31 32 #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ 33 (ts)->ts_sec = (tv)->tv_sec; \ 34 (ts)->ts_nsec = (tv)->tv_usec * 1000; \ 35 } 36 #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ 37 (tv)->tv_sec = (ts)->ts_sec; \ 38 (tv)->tv_usec = (ts)->ts_nsec / 1000; \ 39 } 40 41 struct timezone { 42 int tz_minuteswest; /* minutes west of Greenwich */ 43 int tz_dsttime; /* type of dst correction */ 44 }; 45 #define DST_NONE 0 /* not on dst */ 46 #define DST_USA 1 /* USA style dst */ 47 #define DST_AUST 2 /* Australian style dst */ 48 #define DST_WET 3 /* Western European dst */ 49 #define DST_MET 4 /* Middle European dst */ 50 #define DST_EET 5 /* Eastern European dst */ 51 #define DST_CAN 6 /* Canada */ 52 53 /* Operations on timevals. */ 54 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 55 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 56 #define timercmp(tvp, uvp, cmp) \ 57 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 58 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 59 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 60 61 /* 62 * Names of the interval timers, and structure 63 * defining a timer setting. 64 */ 65 #define ITIMER_REAL 0 66 #define ITIMER_VIRTUAL 1 67 #define ITIMER_PROF 2 68 69 struct itimerval { 70 struct timeval it_interval; /* timer interval */ 71 struct timeval it_value; /* current value */ 72 }; 73 74 /* 75 * Getkerninfo clock information structure 76 */ 77 struct clockinfo { 78 int hz; /* clock frequency */ 79 int tick; /* micro-seconds per hz tick */ 80 int stathz; /* statistics clock frequency */ 81 int profhz; /* profiling clock frequency */ 82 }; 83 84 #ifndef KERNEL 85 #include <time.h> 86 87 #ifndef _POSIX_SOURCE 88 #include <sys/cdefs.h> 89 90 __BEGIN_DECLS 91 int adjtime __P((const struct timeval *, struct timeval *)); 92 int getitimer __P((int, struct itimerval *)); 93 int gettimeofday __P((struct timeval *, struct timezone *)); 94 int setitimer __P((int, const struct itimerval *, struct itimerval *)); 95 int settimeofday __P((const struct timeval *, const struct timezone *)); 96 int utimes __P((const char *, const struct timeval *)); 97 __END_DECLS 98 #endif /* !POSIX */ 99 100 #endif /* !KERNEL */ 101 102 #endif /* !_SYS_TIME_H_ */ 103