1: /* $OpenBSD: time.h,v 1.11 2000/10/10 13:36:48 itojun Exp $ */
2: /* $NetBSD: time.h,v 1.18 1996/04/23 10:29:33 mycroft Exp $ */
3:
4: /*
5: * Copyright (c) 1982, 1986, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)time.h 8.2 (Berkeley) 7/10/94
33: */
34:
35: #ifndef _SYS_TIME_H_
36: #define _SYS_TIME_H_
37:
38: #include <sys/types.h>
39:
40: /*
41: * Structure returned by gettimeofday(2) system call,
42: * and used in other calls.
43: */
44: struct timeval {
45: long tv_sec; /* seconds */
46: long tv_usec; /* and microseconds */
47: };
48:
49: /*
50: * Structure defined by POSIX.1b to be like a timeval.
51: */
52: struct timespec {
53: time_t tv_sec; /* seconds */
54: long tv_nsec; /* and nanoseconds */
55: };
56:
57: #define TIMEVAL_TO_TIMESPEC(tv, ts) { \
58: (ts)->tv_sec = (tv)->tv_sec; \
59: (ts)->tv_nsec = (tv)->tv_usec * 1000; \
60: }
61: #define TIMESPEC_TO_TIMEVAL(tv, ts) { \
62: (tv)->tv_sec = (ts)->tv_sec; \
63: (tv)->tv_usec = (ts)->tv_nsec / 1000; \
64: }
65:
66: struct timezone {
67: int tz_minuteswest; /* minutes west of Greenwich */
68: int tz_dsttime; /* type of dst correction */
69: };
70: #define DST_NONE 0 /* not on dst */
71: #define DST_USA 1 /* USA style dst */
72: #define DST_AUST 2 /* Australian style dst */
73: #define DST_WET 3 /* Western European dst */
74: #define DST_MET 4 /* Middle European dst */
75: #define DST_EET 5 /* Eastern European dst */
76: #define DST_CAN 6 /* Canada */
77:
78: /* Operations on timevals. */
79: #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
80: #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
81: #define timercmp(tvp, uvp, cmp) \
82: (((tvp)->tv_sec == (uvp)->tv_sec) ? \
83: ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
84: ((tvp)->tv_sec cmp (uvp)->tv_sec))
85: #define timeradd(tvp, uvp, vvp) \
86: do { \
87: (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
88: (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
89: if ((vvp)->tv_usec >= 1000000) { \
90: (vvp)->tv_sec++; \
91: (vvp)->tv_usec -= 1000000; \
92: } \
93: } while (0)
94: #define timersub(tvp, uvp, vvp) \
95: do { \
96: (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
97: (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
98: if ((vvp)->tv_usec < 0) { \
99: (vvp)->tv_sec--; \
100: (vvp)->tv_usec += 1000000; \
101: } \
102: } while (0)
103:
104: /* Operations on timespecs. */
105: #define timespecclear(tsp) (tsp)->tv_sec = (tsp)->tv_nsec = 0
106: #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
107: #define timespeccmp(tsp, usp, cmp) \
108: (((tsp)->tv_sec == (usp)->tv_sec) ? \
109: ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
110: ((tsp)->tv_sec cmp (usp)->tv_sec))
111: #define timespecadd(tsp, usp, vsp) \
112: do { \
113: (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
114: (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
115: if ((vsp)->tv_nsec >= 1000000000L) { \
116: (vsp)->tv_sec++; \
117: (vsp)->tv_nsec -= 1000000000L; \
118: } \
119: } while (0)
120: #define timespecsub(tsp, usp, vsp) \
121: do { \
122: (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
123: (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
124: if ((vsp)->tv_nsec < 0) { \
125: (vsp)->tv_sec--; \
126: (vsp)->tv_nsec += 1000000000L; \
127: } \
128: } while (0)
129:
130: /*
131: * Names of the interval timers, and structure
132: * defining a timer setting.
133: */
134: #define ITIMER_REAL 0
135: #define ITIMER_VIRTUAL 1
136: #define ITIMER_PROF 2
137:
138: struct itimerval {
139: struct timeval it_interval; /* timer interval */
140: struct timeval it_value; /* current value */
141: };
142:
143: /*
144: * Getkerninfo clock information structure
145: */
146: struct clockinfo {
147: int hz; /* clock frequency */
148: int tick; /* micro-seconds per hz tick */
149: int tickadj; /* clock skew rate for adjtime() */
150: int stathz; /* statistics clock frequency */
151: int profhz; /* profiling clock frequency */
152: };
153:
154: #define CLOCK_REALTIME 0
155: #define CLOCK_VIRTUAL 1
156: #define CLOCK_PROF 2
157:
158: #define TIMER_RELTIME 0x0 /* relative timer */
159: #define TIMER_ABSTIME 0x1 /* absolute timer */
160:
161: /* --- stuff got cut here - niels --- */
162:
163: #endif /* !_SYS_TIME_H_ */
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