1 | /* $NetBSD: time.h,v 1.73 2016/07/07 06:55:44 msaitoh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1982, 1986, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. Neither the name of the University nor the names of its contributors |
16 | * may be used to endorse or promote products derived from this software |
17 | * without specific prior written permission. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 | * SUCH DAMAGE. |
30 | * |
31 | * @(#)time.h 8.5 (Berkeley) 5/4/95 |
32 | */ |
33 | |
34 | #ifndef _SYS_TIME_H_ |
35 | #define _SYS_TIME_H_ |
36 | |
37 | #include <sys/featuretest.h> |
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 | time_t tv_sec; /* seconds */ |
46 | suseconds_t tv_usec; /* and microseconds */ |
47 | }; |
48 | |
49 | #include <sys/timespec.h> |
50 | |
51 | #if defined(_NETBSD_SOURCE) |
52 | #define TIMEVAL_TO_TIMESPEC(tv, ts) do { \ |
53 | (ts)->tv_sec = (tv)->tv_sec; \ |
54 | (ts)->tv_nsec = (tv)->tv_usec * 1000; \ |
55 | } while (/*CONSTCOND*/0) |
56 | #define TIMESPEC_TO_TIMEVAL(tv, ts) do { \ |
57 | (tv)->tv_sec = (ts)->tv_sec; \ |
58 | (tv)->tv_usec = (suseconds_t)(ts)->tv_nsec / 1000; \ |
59 | } while (/*CONSTCOND*/0) |
60 | |
61 | /* |
62 | * Note: timezone is obsolete. All timezone handling is now in |
63 | * userland. Its just here for back compatibility. |
64 | */ |
65 | struct timezone { |
66 | int tz_minuteswest; /* minutes west of Greenwich */ |
67 | int tz_dsttime; /* type of dst correction */ |
68 | }; |
69 | |
70 | /* Operations on timevals. */ |
71 | #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0L |
72 | #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) |
73 | #define timercmp(tvp, uvp, cmp) \ |
74 | (((tvp)->tv_sec == (uvp)->tv_sec) ? \ |
75 | ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ |
76 | ((tvp)->tv_sec cmp (uvp)->tv_sec)) |
77 | #define timeradd(tvp, uvp, vvp) \ |
78 | do { \ |
79 | (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ |
80 | (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ |
81 | if ((vvp)->tv_usec >= 1000000) { \ |
82 | (vvp)->tv_sec++; \ |
83 | (vvp)->tv_usec -= 1000000; \ |
84 | } \ |
85 | } while (/* CONSTCOND */ 0) |
86 | #define timersub(tvp, uvp, vvp) \ |
87 | do { \ |
88 | (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ |
89 | (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ |
90 | if ((vvp)->tv_usec < 0) { \ |
91 | (vvp)->tv_sec--; \ |
92 | (vvp)->tv_usec += 1000000; \ |
93 | } \ |
94 | } while (/* CONSTCOND */ 0) |
95 | |
96 | /* |
97 | * hide bintime for _STANDALONE because this header is used for hpcboot.exe, |
98 | * which is built with compilers which don't recognize LL suffix. |
99 | * http://mail-index.NetBSD.org/tech-userlevel/2008/02/27/msg000181.html |
100 | */ |
101 | #if !defined(_STANDALONE) |
102 | struct bintime { |
103 | time_t sec; |
104 | uint64_t frac; |
105 | }; |
106 | |
107 | static __inline void |
108 | bintime_addx(struct bintime *bt, uint64_t x) |
109 | { |
110 | uint64_t u; |
111 | |
112 | u = bt->frac; |
113 | bt->frac += x; |
114 | if (u > bt->frac) |
115 | bt->sec++; |
116 | } |
117 | |
118 | static __inline void |
119 | bintime_add(struct bintime *bt, const struct bintime *bt2) |
120 | { |
121 | uint64_t u; |
122 | |
123 | u = bt->frac; |
124 | bt->frac += bt2->frac; |
125 | if (u > bt->frac) |
126 | bt->sec++; |
127 | bt->sec += bt2->sec; |
128 | } |
129 | |
130 | static __inline void |
131 | bintime_sub(struct bintime *bt, const struct bintime *bt2) |
132 | { |
133 | uint64_t u; |
134 | |
135 | u = bt->frac; |
136 | bt->frac -= bt2->frac; |
137 | if (u < bt->frac) |
138 | bt->sec--; |
139 | bt->sec -= bt2->sec; |
140 | } |
141 | |
142 | #define bintimecmp(bta, btb, cmp) \ |
143 | (((bta)->sec == (btb)->sec) ? \ |
144 | ((bta)->frac cmp (btb)->frac) : \ |
145 | ((bta)->sec cmp (btb)->sec)) |
146 | |
147 | /*- |
148 | * Background information: |
149 | * |
150 | * When converting between timestamps on parallel timescales of differing |
151 | * resolutions it is historical and scientific practice to round down rather |
152 | * than doing 4/5 rounding. |
153 | * |
154 | * The date changes at midnight, not at noon. |
155 | * |
156 | * Even at 15:59:59.999999999 it's not four'o'clock. |
157 | * |
158 | * time_second ticks after N.999999999 not after N.4999999999 |
159 | */ |
160 | |
161 | static __inline void |
162 | bintime2timespec(const struct bintime *bt, struct timespec *ts) |
163 | { |
164 | |
165 | ts->tv_sec = bt->sec; |
166 | ts->tv_nsec = |
167 | (long)(((uint64_t)1000000000 * (uint32_t)(bt->frac >> 32)) >> 32); |
168 | } |
169 | |
170 | static __inline void |
171 | timespec2bintime(const struct timespec *ts, struct bintime *bt) |
172 | { |
173 | |
174 | bt->sec = ts->tv_sec; |
175 | /* 18446744073 = int(2^64 / 1000000000) */ |
176 | bt->frac = (uint64_t)ts->tv_nsec * (uint64_t)18446744073ULL; |
177 | } |
178 | |
179 | static __inline void |
180 | bintime2timeval(const struct bintime *bt, struct timeval *tv) |
181 | { |
182 | |
183 | tv->tv_sec = bt->sec; |
184 | tv->tv_usec = |
185 | (suseconds_t)(((uint64_t)1000000 * (uint32_t)(bt->frac >> 32)) >> 32); |
186 | } |
187 | |
188 | static __inline void |
189 | timeval2bintime(const struct timeval *tv, struct bintime *bt) |
190 | { |
191 | |
192 | bt->sec = tv->tv_sec; |
193 | /* 18446744073709 = int(2^64 / 1000000) */ |
194 | bt->frac = (uint64_t)tv->tv_usec * (uint64_t)18446744073709ULL; |
195 | } |
196 | |
197 | static __inline struct bintime |
198 | ms2bintime(uint64_t ms) |
199 | { |
200 | struct bintime bt; |
201 | |
202 | bt.sec = (time_t)(ms / 1000U); |
203 | bt.frac = (((ms % 1000U) >> 32)/1000U) >> 32; |
204 | |
205 | return bt; |
206 | } |
207 | |
208 | static __inline struct bintime |
209 | us2bintime(uint64_t us) |
210 | { |
211 | struct bintime bt; |
212 | |
213 | bt.sec = (time_t)(us / 1000000U); |
214 | bt.frac = (((us % 1000000U) >> 32)/1000000U) >> 32; |
215 | |
216 | return bt; |
217 | } |
218 | |
219 | static __inline struct bintime |
220 | ns2bintime(uint64_t ns) |
221 | { |
222 | struct bintime bt; |
223 | |
224 | bt.sec = (time_t)(ns / 1000000000U); |
225 | bt.frac = (((ns % 1000000000U) >> 32)/1000000000U) >> 32; |
226 | |
227 | return bt; |
228 | } |
229 | #endif /* !defined(_STANDALONE) */ |
230 | |
231 | /* Operations on timespecs. */ |
232 | #define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L) |
233 | #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec) |
234 | #define timespeccmp(tsp, usp, cmp) \ |
235 | (((tsp)->tv_sec == (usp)->tv_sec) ? \ |
236 | ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \ |
237 | ((tsp)->tv_sec cmp (usp)->tv_sec)) |
238 | #define timespecadd(tsp, usp, vsp) \ |
239 | do { \ |
240 | (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \ |
241 | (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \ |
242 | if ((vsp)->tv_nsec >= 1000000000L) { \ |
243 | (vsp)->tv_sec++; \ |
244 | (vsp)->tv_nsec -= 1000000000L; \ |
245 | } \ |
246 | } while (/* CONSTCOND */ 0) |
247 | #define timespecsub(tsp, usp, vsp) \ |
248 | do { \ |
249 | (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \ |
250 | (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \ |
251 | if ((vsp)->tv_nsec < 0) { \ |
252 | (vsp)->tv_sec--; \ |
253 | (vsp)->tv_nsec += 1000000000L; \ |
254 | } \ |
255 | } while (/* CONSTCOND */ 0) |
256 | #define timespec2ns(x) (((uint64_t)(x)->tv_sec) * 1000000000L + (x)->tv_nsec) |
257 | #endif /* _NETBSD_SOURCE */ |
258 | |
259 | /* |
260 | * Names of the interval timers, and structure |
261 | * defining a timer setting. |
262 | * NB: Must match the CLOCK_ constants below. |
263 | */ |
264 | #define ITIMER_REAL 0 |
265 | #define ITIMER_VIRTUAL 1 |
266 | #define ITIMER_PROF 2 |
267 | #define ITIMER_MONOTONIC 3 |
268 | |
269 | struct itimerval { |
270 | struct timeval it_interval; /* timer interval */ |
271 | struct timeval it_value; /* current value */ |
272 | }; |
273 | |
274 | /* |
275 | * Structure defined by POSIX.1b to be like a itimerval, but with |
276 | * timespecs. Used in the timer_*() system calls. |
277 | */ |
278 | struct itimerspec { |
279 | struct timespec it_interval; |
280 | struct timespec it_value; |
281 | }; |
282 | |
283 | #define CLOCK_REALTIME 0 |
284 | #define CLOCK_VIRTUAL 1 |
285 | #define CLOCK_PROF 2 |
286 | #define CLOCK_MONOTONIC 3 |
287 | #define CLOCK_THREAD_CPUTIME_ID 0x80000000 |
288 | #define CLOCK_PROCESS_CPUTIME_ID 0x40000000 |
289 | |
290 | #if defined(_NETBSD_SOURCE) |
291 | #define TIMER_RELTIME 0x0 /* relative timer */ |
292 | #endif |
293 | #define TIMER_ABSTIME 0x1 /* absolute timer */ |
294 | |
295 | #ifdef _KERNEL |
296 | #include <sys/timevar.h> |
297 | #else /* !_KERNEL */ |
298 | #ifndef _STANDALONE |
299 | #if (_POSIX_C_SOURCE - 0) >= 200112L || \ |
300 | (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ |
301 | (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) |
302 | #include <sys/select.h> |
303 | #endif |
304 | |
305 | #include <sys/cdefs.h> |
306 | #include <time.h> |
307 | |
308 | __BEGIN_DECLS |
309 | #ifndef __LIBC12_SOURCE__ |
310 | #if (_POSIX_C_SOURCE - 0) >= 200112L || \ |
311 | defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) |
312 | int getitimer(int, struct itimerval *) __RENAME(__getitimer50); |
313 | int gettimeofday(struct timeval * __restrict, void *__restrict) |
314 | __RENAME(__gettimeofday50); |
315 | int setitimer(int, const struct itimerval * __restrict, |
316 | struct itimerval * __restrict) __RENAME(__setitimer50); |
317 | int utimes(const char *, const struct timeval [2]) __RENAME(__utimes50); |
318 | #endif /* _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE || _NETBSD_SOURCE */ |
319 | |
320 | #if defined(_NETBSD_SOURCE) || defined(HAVE_NBTOOL_CONFIG_H) |
321 | int adjtime(const struct timeval *, struct timeval *) __RENAME(__adjtime50); |
322 | int futimes(int, const struct timeval [2]) __RENAME(__futimes50); |
323 | int lutimes(const char *, const struct timeval [2]) __RENAME(__lutimes50); |
324 | int settimeofday(const struct timeval * __restrict, |
325 | const void *__restrict) __RENAME(__settimeofday50); |
326 | #endif /* _NETBSD_SOURCE */ |
327 | #endif /* __LIBC12_SOURCE__ */ |
328 | __END_DECLS |
329 | |
330 | #endif /* !_STANDALONE */ |
331 | #endif /* !_KERNEL */ |
332 | #endif /* !_SYS_TIME_H_ */ |
333 | |