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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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