Annotation of src/sys/sys/time.h, Revision 1.79
1.79 ! maya 1: /* $NetBSD: time.h,v 1.78 2017/01/17 13:13:07 maya Exp $ */
1.8 cgd 2:
1.1 cgd 3: /*
1.6 cgd 4: * Copyright (c) 1982, 1986, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 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.
1.40 agc 15: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 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: *
1.27 fvdl 31: * @(#)time.h 8.5 (Berkeley) 5/4/95
1.1 cgd 32: */
33:
34: #ifndef _SYS_TIME_H_
1.34 simonb 35: #define _SYS_TIME_H_
1.1 cgd 36:
1.38 bjh21 37: #include <sys/featuretest.h>
1.12 mycroft 38: #include <sys/types.h>
39:
1.1 cgd 40: /*
41: * Structure returned by gettimeofday(2) system call,
42: * and used in other calls.
43: */
44: struct timeval {
1.63 christos 45: time_t tv_sec; /* seconds */
46: suseconds_t tv_usec; /* and microseconds */
1.1 cgd 47: };
1.4 cgd 48:
1.70 kamil 49: #include <sys/timespec.h>
1.4 cgd 50:
1.54 kleink 51: #if defined(_NETBSD_SOURCE)
1.43 atatat 52: #define TIMEVAL_TO_TIMESPEC(tv, ts) do { \
1.17 jtc 53: (ts)->tv_sec = (tv)->tv_sec; \
54: (ts)->tv_nsec = (tv)->tv_usec * 1000; \
1.43 atatat 55: } while (/*CONSTCOND*/0)
56: #define TIMESPEC_TO_TIMEVAL(tv, ts) do { \
1.17 jtc 57: (tv)->tv_sec = (ts)->tv_sec; \
1.63 christos 58: (tv)->tv_usec = (suseconds_t)(ts)->tv_nsec / 1000; \
1.43 atatat 59: } while (/*CONSTCOND*/0)
1.1 cgd 60:
1.21 perry 61: /*
62: * Note: timezone is obsolete. All timezone handling is now in
63: * userland. Its just here for back compatibility.
64: */
1.1 cgd 65: struct timezone {
66: int tz_minuteswest; /* minutes west of Greenwich */
67: int tz_dsttime; /* type of dst correction */
68: };
69:
1.6 cgd 70: /* Operations on timevals. */
1.59 christos 71: #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0L
1.1 cgd 72: #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
1.6 cgd 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))
1.14 mycroft 77: #define timeradd(tvp, uvp, vvp) \
1.10 mycroft 78: do { \
1.14 mycroft 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; \
1.10 mycroft 84: } \
1.31 lukem 85: } while (/* CONSTCOND */ 0)
1.14 mycroft 86: #define timersub(tvp, uvp, vvp) \
1.10 mycroft 87: do { \
1.14 mycroft 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; \
1.20 jtc 93: } \
1.31 lukem 94: } while (/* CONSTCOND */ 0)
1.20 jtc 95:
1.61 yamt 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)
1.55 kardel 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:
1.68 riastrad 142: #define bintimecmp(bta, btb, cmp) \
143: (((bta)->sec == (btb)->sec) ? \
144: ((bta)->frac cmp (btb)->frac) : \
145: ((bta)->sec cmp (btb)->sec))
146:
1.55 kardel 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:
1.75 pgoyette 161: /*
1.76 pgoyette 162: * The magic numbers for converting ms/us/ns to fractions
1.75 pgoyette 163: */
164:
1.76 pgoyette 165: /* 1ms = (2^64) / 1000 */
166: #define BINTIME_SCALE_MS ((uint64_t)18446744073709551ULL)
167:
168: /* 1us = (2^64) / 1000000 */
169: #define BINTIME_SCALE_US ((uint64_t)18446744073709ULL)
170:
171: /* 1ns = (2^64) / 1000000000 */
172: #define BINTIME_SCALE_NS ((uint64_t)18446744073ULL)
173:
1.55 kardel 174: static __inline void
175: bintime2timespec(const struct bintime *bt, struct timespec *ts)
176: {
177:
1.60 yamt 178: ts->tv_sec = bt->sec;
1.55 kardel 179: ts->tv_nsec =
1.78 maya 180: (long)((1000000000ULL * (uint32_t)(bt->frac >> 32)) >> 32);
1.55 kardel 181: }
182:
183: static __inline void
184: timespec2bintime(const struct timespec *ts, struct bintime *bt)
185: {
186:
187: bt->sec = ts->tv_sec;
1.77 pgoyette 188: bt->frac = (uint64_t)ts->tv_nsec * BINTIME_SCALE_NS;
1.55 kardel 189: }
190:
191: static __inline void
192: bintime2timeval(const struct bintime *bt, struct timeval *tv)
193: {
194:
195: tv->tv_sec = bt->sec;
196: tv->tv_usec =
1.79 ! maya 197: (suseconds_t)((1000000ULL * (uint32_t)(bt->frac >> 32)) >> 32);
1.55 kardel 198: }
199:
200: static __inline void
201: timeval2bintime(const struct timeval *tv, struct bintime *bt)
202: {
203:
1.63 christos 204: bt->sec = tv->tv_sec;
1.77 pgoyette 205: bt->frac = (uint64_t)tv->tv_usec * BINTIME_SCALE_US;
1.55 kardel 206: }
1.68 riastrad 207:
208: static __inline struct bintime
209: ms2bintime(uint64_t ms)
210: {
1.69 riastrad 211: struct bintime bt;
1.68 riastrad 212:
1.71 christos 213: bt.sec = (time_t)(ms / 1000U);
1.77 pgoyette 214: bt.frac = (uint64_t)(ms % 1000U) * BINTIME_SCALE_MS;
1.69 riastrad 215:
216: return bt;
1.68 riastrad 217: }
218:
219: static __inline struct bintime
220: us2bintime(uint64_t us)
221: {
1.69 riastrad 222: struct bintime bt;
223:
1.71 christos 224: bt.sec = (time_t)(us / 1000000U);
1.77 pgoyette 225: bt.frac = (uint64_t)(us % 1000000U) * BINTIME_SCALE_US;
1.68 riastrad 226:
1.69 riastrad 227: return bt;
1.68 riastrad 228: }
229:
230: static __inline struct bintime
231: ns2bintime(uint64_t ns)
232: {
1.69 riastrad 233: struct bintime bt;
234:
1.71 christos 235: bt.sec = (time_t)(ns / 1000000000U);
1.77 pgoyette 236: bt.frac = (uint64_t)(ns % 1000000000U) * BINTIME_SCALE_NS;
1.68 riastrad 237:
1.69 riastrad 238: return bt;
1.68 riastrad 239: }
1.61 yamt 240: #endif /* !defined(_STANDALONE) */
1.55 kardel 241:
1.20 jtc 242: /* Operations on timespecs. */
1.59 christos 243: #define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
244: #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
1.20 jtc 245: #define timespeccmp(tsp, usp, cmp) \
246: (((tsp)->tv_sec == (usp)->tv_sec) ? \
247: ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
248: ((tsp)->tv_sec cmp (usp)->tv_sec))
249: #define timespecadd(tsp, usp, vsp) \
250: do { \
251: (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
252: (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
253: if ((vsp)->tv_nsec >= 1000000000L) { \
254: (vsp)->tv_sec++; \
255: (vsp)->tv_nsec -= 1000000000L; \
256: } \
1.31 lukem 257: } while (/* CONSTCOND */ 0)
1.20 jtc 258: #define timespecsub(tsp, usp, vsp) \
259: do { \
260: (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
261: (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
262: if ((vsp)->tv_nsec < 0) { \
263: (vsp)->tv_sec--; \
264: (vsp)->tv_nsec += 1000000000L; \
1.10 mycroft 265: } \
1.31 lukem 266: } while (/* CONSTCOND */ 0)
1.62 christos 267: #define timespec2ns(x) (((uint64_t)(x)->tv_sec) * 1000000000L + (x)->tv_nsec)
1.54 kleink 268: #endif /* _NETBSD_SOURCE */
1.1 cgd 269:
270: /*
271: * Names of the interval timers, and structure
272: * defining a timer setting.
1.65 christos 273: * NB: Must match the CLOCK_ constants below.
1.1 cgd 274: */
1.65 christos 275: #define ITIMER_REAL 0
276: #define ITIMER_VIRTUAL 1
277: #define ITIMER_PROF 2
278: #define ITIMER_MONOTONIC 3
1.1 cgd 279:
280: struct itimerval {
281: struct timeval it_interval; /* timer interval */
282: struct timeval it_value; /* current value */
1.5 cgd 283: };
284:
1.6 cgd 285: /*
1.35 thorpej 286: * Structure defined by POSIX.1b to be like a itimerval, but with
287: * timespecs. Used in the timer_*() system calls.
288: */
289: struct itimerspec {
290: struct timespec it_interval;
291: struct timespec it_value;
292: };
293:
1.34 simonb 294: #define CLOCK_REALTIME 0
295: #define CLOCK_VIRTUAL 1
296: #define CLOCK_PROF 2
297: #define CLOCK_MONOTONIC 3
1.74 christos 298: #define CLOCK_THREAD_CPUTIME_ID 0x20000000
1.72 christos 299: #define CLOCK_PROCESS_CPUTIME_ID 0x40000000
1.19 jtc 300:
1.64 drochner 301: #if defined(_NETBSD_SOURCE)
1.34 simonb 302: #define TIMER_RELTIME 0x0 /* relative timer */
1.64 drochner 303: #endif
1.34 simonb 304: #define TIMER_ABSTIME 0x1 /* absolute timer */
1.1 cgd 305:
1.15 jtc 306: #ifdef _KERNEL
1.55 kardel 307: #include <sys/timevar.h>
1.15 jtc 308: #else /* !_KERNEL */
1.23 drochner 309: #ifndef _STANDALONE
1.46 kleink 310: #if (_POSIX_C_SOURCE - 0) >= 200112L || \
311: (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
312: (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
313: #include <sys/select.h>
314: #endif
315:
1.54 kleink 316: #include <sys/cdefs.h>
1.1 cgd 317: #include <time.h>
318:
319: __BEGIN_DECLS
1.63 christos 320: #ifndef __LIBC12_SOURCE__
1.54 kleink 321: #if (_POSIX_C_SOURCE - 0) >= 200112L || \
322: defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
1.63 christos 323: int getitimer(int, struct itimerval *) __RENAME(__getitimer50);
324: int gettimeofday(struct timeval * __restrict, void *__restrict)
325: __RENAME(__gettimeofday50);
1.44 perry 326: int setitimer(int, const struct itimerval * __restrict,
1.63 christos 327: struct itimerval * __restrict) __RENAME(__setitimer50);
328: int utimes(const char *, const struct timeval [2]) __RENAME(__utimes50);
1.54 kleink 329: #endif /* _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE || _NETBSD_SOURCE */
330:
1.63 christos 331: #if defined(_NETBSD_SOURCE) || defined(HAVE_NBTOOL_CONFIG_H)
332: int adjtime(const struct timeval *, struct timeval *) __RENAME(__adjtime50);
333: int futimes(int, const struct timeval [2]) __RENAME(__futimes50);
334: int lutimes(const char *, const struct timeval [2]) __RENAME(__lutimes50);
1.44 perry 335: int settimeofday(const struct timeval * __restrict,
1.63 christos 336: const void *__restrict) __RENAME(__settimeofday50);
1.54 kleink 337: #endif /* _NETBSD_SOURCE */
1.63 christos 338: #endif /* __LIBC12_SOURCE__ */
1.1 cgd 339: __END_DECLS
1.23 drochner 340:
341: #endif /* !_STANDALONE */
1.15 jtc 342: #endif /* !_KERNEL */
1.1 cgd 343: #endif /* !_SYS_TIME_H_ */
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