source: trunk/src/emx/include/sys/time.h@ 1490

Last change on this file since 1490 was 658, checked in by bird, 22 years ago

todo.
  • Property cvs2svn:cvs-rev set to 1.7
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 10.4 KB
Line 
1/*
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)time.h 8.5 (Berkeley) 5/4/95
34 * $FreeBSD: src/sys/sys/time.h,v 1.61 2003/02/23 10:18:31 phk Exp $
35 */
36
37/** @file
38 * FreeBSD 5.1
39 *
40 * @changed EMX isms
41 * @changed IBM TCP paranoia.
42 * @todo Implement futimes() and lutimes().
43 */
44
45#ifndef _SYS_TIME_H_
46#define _SYS_TIME_H_
47
48#include <sys/_timeval.h>
49#include <sys/types.h>
50#include <sys/timespec.h>
51
52#if !defined (_TIMEZONE) /* bird: EMX */
53#define _TIMEZONE /* bird: EMX */
54struct timezone {
55 int tz_minuteswest; /* minutes west of Greenwich */
56 int tz_dsttime; /* type of dst correction */
57};
58#endif /* bird: EMX */
59#define DST_NONE 0 /* not on dst */
60#define DST_USA 1 /* USA style dst */
61#define DST_AUST 2 /* Australian style dst */
62#define DST_WET 3 /* Western European dst */
63#define DST_MET 4 /* Middle European dst */
64#define DST_EET 5 /* Eastern European dst */
65#define DST_CAN 6 /* Canada */
66
67#if __BSD_VISIBLE
68struct bintime {
69 time_t sec;
70 uint64_t frac;
71};
72
73static __inline void
74bintime_addx(struct bintime *bt, uint64_t x)
75{
76 uint64_t u;
77
78 u = bt->frac;
79 bt->frac += x;
80 if (u > bt->frac)
81 bt->sec++;
82}
83
84static __inline void
85bintime_add(struct bintime *bt, struct bintime *bt2)
86{
87 uint64_t u;
88
89 u = bt->frac;
90 bt->frac += bt2->frac;
91 if (u > bt->frac)
92 bt->sec++;
93 bt->sec += bt2->sec;
94}
95
96static __inline void
97bintime_sub(struct bintime *bt, struct bintime *bt2)
98{
99 uint64_t u;
100
101 u = bt->frac;
102 bt->frac -= bt2->frac;
103 if (u < bt->frac)
104 bt->sec--;
105 bt->sec -= bt2->sec;
106}
107
108/*-
109 * Background information:
110 *
111 * When converting between timestamps on parallel timescales of differing
112 * resolutions it is historical and scientific practice to round down rather
113 * than doing 4/5 rounding.
114 *
115 * The date changes at midnight, not at noon.
116 *
117 * Even at 15:59:59.999999999 it's not four'o'clock.
118 *
119 * time_second ticks after N.999999999 not after N.4999999999
120 */
121
122static __inline void
123bintime2timespec(struct bintime *bt, struct timespec *ts)
124{
125
126 ts->tv_sec = bt->sec;
127 ts->tv_nsec = ((uint64_t)1000000000 * (uint32_t)(bt->frac >> 32)) >> 32;
128}
129
130static __inline void
131timespec2bintime(struct timespec *ts, struct bintime *bt)
132{
133
134 bt->sec = ts->tv_sec;
135 /* 18446744073 = int(2^64 / 1000000000) */
136 bt->frac = ts->tv_nsec * (uint64_t)18446744073LL;
137}
138
139static __inline void
140bintime2timeval(struct bintime *bt, struct timeval *tv)
141{
142
143 tv->tv_sec = bt->sec;
144 tv->tv_usec = ((uint64_t)1000000 * (uint32_t)(bt->frac >> 32)) >> 32;
145}
146
147static __inline void
148timeval2bintime(struct timeval *tv, struct bintime *bt)
149{
150
151 bt->sec = tv->tv_sec;
152 /* 18446744073709 = int(2^64 / 1000000) */
153 bt->frac = tv->tv_usec * (uint64_t)18446744073709LL;
154}
155#endif /* __BSD_VISIBLE */
156
157#ifdef _KERNEL
158
159/* Operations on timespecs */
160#define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
161#define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
162#define timespeccmp(tvp, uvp, cmp) \
163 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
164 ((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
165 ((tvp)->tv_sec cmp (uvp)->tv_sec))
166#define timespecadd(vvp, uvp) \
167 do { \
168 (vvp)->tv_sec += (uvp)->tv_sec; \
169 (vvp)->tv_nsec += (uvp)->tv_nsec; \
170 if ((vvp)->tv_nsec >= 1000000000) { \
171 (vvp)->tv_sec++; \
172 (vvp)->tv_nsec -= 1000000000; \
173 } \
174 } while (0)
175#define timespecsub(vvp, uvp) \
176 do { \
177 (vvp)->tv_sec -= (uvp)->tv_sec; \
178 (vvp)->tv_nsec -= (uvp)->tv_nsec; \
179 if ((vvp)->tv_nsec < 0) { \
180 (vvp)->tv_sec--; \
181 (vvp)->tv_nsec += 1000000000; \
182 } \
183 } while (0)
184
185/* Operations on timevals. */
186
187#define timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
188#define timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
189#define timevalcmp(tvp, uvp, cmp) \
190 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
191 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
192 ((tvp)->tv_sec cmp (uvp)->tv_sec))
193
194/* timevaladd and timevalsub are not inlined */
195
196#endif /* _KERNEL */
197
198#ifndef _KERNEL /* NetBSD/OpenBSD compatible interfaces */
199
200#define timerclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
201#define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
202#ifndef timercmp /* bird: TCP paranoia */
203#define timercmp(tvp, uvp, cmp) \
204 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
205 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
206 ((tvp)->tv_sec cmp (uvp)->tv_sec))
207#endif /* bird: TCP paranoia */
208#ifndef timeradd /* bird: TCP paranoia */
209#define timeradd(tvp, uvp, vvp) \
210 do { \
211 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
212 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
213 if ((vvp)->tv_usec >= 1000000) { \
214 (vvp)->tv_sec++; \
215 (vvp)->tv_usec -= 1000000; \
216 } \
217 } while (0)
218#endif /* bird: TCP paranoia */
219#ifndef timersub /* bird: TCP paranoia */
220#define timersub(tvp, uvp, vvp) \
221 do { \
222 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
223 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
224 if ((vvp)->tv_usec < 0) { \
225 (vvp)->tv_sec--; \
226 (vvp)->tv_usec += 1000000; \
227 } \
228 } while (0)
229#endif /* bird: TCP paranoia */
230#endif
231
232/*
233 * Names of the interval timers, and structure
234 * defining a timer setting.
235 */
236#define ITIMER_REAL 0
237#define ITIMER_VIRTUAL 1
238#define ITIMER_PROF 2
239
240#pragma pack(4) /* bird: IBM TCP paranoia */
241struct itimerval {
242 struct timeval it_interval; /* timer interval */
243 struct timeval it_value; /* current value */
244};
245#pragma pack() /* bird: IBM TCP paranoia */
246
247/*
248 * Getkerninfo clock information structure
249 */
250struct clockinfo {
251 int hz; /* clock frequency */
252 int tick; /* micro-seconds per hz tick */
253#if 0 /* bird: OS/2 TCP doesn't define this. */
254 int spare;
255#endif
256 int stathz; /* statistics clock frequency */
257 int profhz; /* profiling clock frequency */
258};
259
260/* CLOCK_REALTIME and TIMER_ABSTIME are supposed to be in time.h */
261
262#ifndef CLOCK_REALTIME
263#define CLOCK_REALTIME 0
264#endif
265#define CLOCK_VIRTUAL 1
266#define CLOCK_PROF 2
267#define CLOCK_MONOTONIC 4
268
269#define TIMER_RELTIME 0x0 /* relative timer */
270#ifndef TIMER_ABSTIME
271#define TIMER_ABSTIME 0x1 /* absolute timer */
272#endif
273
274#ifdef _KERNEL
275extern time_t time_second;
276extern time_t time_uptime;
277
278/*
279 * Functions for looking at our clock: [get]{bin,nano,micro}[up]time()
280 *
281 * Functions without the "get" prefix returns the best timestamp
282 * we can produce in the given format.
283 *
284 * "bin" == struct bintime == seconds + 64 bit fraction of seconds.
285 * "nano" == struct timespec == seconds + nanoseconds.
286 * "micro" == struct timeval == seconds + microseconds.
287 *
288 * Functions containing "up" returns time relative to boot and
289 * should be used for calculating time intervals.
290 *
291 * Functions without "up" returns GMT time.
292 *
293 * Functions with the "get" prefix returns a less precise result
294 * much faster than the functions without "get" prefix and should
295 * be used where a precision of 10 msec is acceptable or where
296 * performance is priority. (NB: "precision", _not_ "resolution" !)
297 *
298 */
299
300void binuptime(struct bintime *bt);
301void nanouptime(struct timespec *tsp);
302void microuptime(struct timeval *tvp);
303
304void bintime(struct bintime *bt);
305void nanotime(struct timespec *tsp);
306void microtime(struct timeval *tvp);
307
308void getbinuptime(struct bintime *bt);
309void getnanouptime(struct timespec *tsp);
310void getmicrouptime(struct timeval *tvp);
311
312void getbintime(struct bintime *bt);
313void getnanotime(struct timespec *tsp);
314void getmicrotime(struct timeval *tvp);
315
316/* Other functions */
317int itimerdecr(struct itimerval *itp, int usec);
318int itimerfix(struct timeval *tv);
319int ppsratecheck(struct timeval *, int *, int);
320int ratecheck(struct timeval *, const struct timeval *);
321void timevaladd(struct timeval *t1, struct timeval *t2);
322void timevalsub(struct timeval *t1, struct timeval *t2);
323int tvtohz(struct timeval *tv);
324#else /* !_KERNEL */
325#include <time.h>
326
327#include <sys/cdefs.h>
328
329__BEGIN_DECLS
330/*int adjtime(const struct timeval *, struct timeval *); bird: TCP */
331int futimes(int, const struct timeval *);
332/*int getitimer(int, struct itimerval *); bird: TCP */
333int gettimeofday(struct timeval *, struct timezone *);
334int lutimes(const char *, const struct timeval *);
335/*int setitimer(int, const struct itimerval *, struct itimerval *); bird: TCP */
336int settimeofday(const struct timeval *, const struct timezone *);
337int utimes(const char *, const struct timeval *);
338
339/* bird: TCP, moved some protos from above and down here. */
340#if !defined(TCPV40HDRS)
341#ifndef TCPCALL
342#define TCPCALL _System
343#endif
344int TCPCALL setitimer(int, const struct itimerval *, struct itimerval *);
345int TCPCALL adjtime(const struct timeval *, struct timeval *);
346int TCPCALL getitimer(int, struct itimerval *);
347#endif /* TCPV40HDRS */
348/* bird: TCP end */
349__END_DECLS
350
351#endif /* !_KERNEL */
352
353#endif /* !_SYS_TIME_H_ */
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