time.h revision 1.7
1 1.7 riastrad /* $NetBSD: time.h,v 1.7 2021/12/19 01:21:45 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_TIME_H_ 33 1.2 riastrad #define _LINUX_TIME_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/time.h> 36 1.2 riastrad 37 1.7 riastrad #include <linux/math64.h> 38 1.7 riastrad 39 1.6 riastrad #define timespec64 timespec /* take that, 2038 */ 40 1.6 riastrad 41 1.4 riastrad #define NSEC_PER_MSEC 1000000L 42 1.7 riastrad #define NSEC_PER_SEC 1000000000L 43 1.4 riastrad 44 1.2 riastrad /* 45 1.2 riastrad * XXX get_seconds as implemented by Linux is a Y2038 bug waiting to 46 1.2 riastrad * happen on 32-bit systems because it returns unsigned long. Some 47 1.2 riastrad * callers in Linux (implicitly) convert the result to time_t, though. 48 1.2 riastrad * We'll pretend get_seconds returns time_t and make sure all our 49 1.2 riastrad * callers treat it as if it did. 50 1.2 riastrad */ 51 1.2 riastrad 52 1.2 riastrad static inline time_t 53 1.2 riastrad get_seconds(void) 54 1.2 riastrad { 55 1.2 riastrad return time_second; 56 1.2 riastrad } 57 1.2 riastrad 58 1.2 riastrad static inline void 59 1.2 riastrad getrawmonotonic(struct timespec *ts) 60 1.2 riastrad { 61 1.2 riastrad getnanouptime(ts); 62 1.2 riastrad } 63 1.2 riastrad 64 1.3 riastrad static inline void 65 1.3 riastrad do_gettimeofday(struct timeval *tv) 66 1.3 riastrad { 67 1.3 riastrad microtime(tv); 68 1.3 riastrad } 69 1.3 riastrad 70 1.2 riastrad static inline bool 71 1.2 riastrad timespec_valid(const struct timespec *ts) 72 1.2 riastrad { 73 1.2 riastrad if (ts->tv_sec < 0) 74 1.2 riastrad return false; 75 1.2 riastrad if (1000000000L <= ts->tv_nsec) 76 1.2 riastrad return false; 77 1.2 riastrad return true; 78 1.2 riastrad } 79 1.2 riastrad 80 1.2 riastrad static inline struct timespec 81 1.2 riastrad ns_to_timespec(const int64_t nsec) 82 1.2 riastrad { 83 1.2 riastrad struct timespec ts; 84 1.2 riastrad 85 1.2 riastrad ts.tv_sec = (nsec / 1000000000L); 86 1.2 riastrad ts.tv_nsec = (nsec % 1000000000L); 87 1.2 riastrad if (ts.tv_nsec < 0) { 88 1.2 riastrad ts.tv_sec -= 1; 89 1.2 riastrad ts.tv_nsec += 1000000000L; 90 1.2 riastrad } 91 1.2 riastrad 92 1.2 riastrad return ts; 93 1.2 riastrad } 94 1.2 riastrad 95 1.2 riastrad static inline int64_t 96 1.2 riastrad timespec_to_ns(const struct timespec *ts) 97 1.2 riastrad { 98 1.2 riastrad return (((int64_t)ts->tv_sec * 1000000000LL) + ts->tv_nsec); 99 1.2 riastrad } 100 1.2 riastrad 101 1.3 riastrad static inline struct timeval 102 1.3 riastrad ns_to_timeval(int64_t nsec) 103 1.3 riastrad { 104 1.3 riastrad struct timespec ts; 105 1.3 riastrad struct timeval tv; 106 1.3 riastrad 107 1.3 riastrad ts = ns_to_timespec(nsec); 108 1.3 riastrad TIMESPEC_TO_TIMEVAL(&tv, &ts); 109 1.3 riastrad 110 1.3 riastrad return tv; 111 1.3 riastrad } 112 1.3 riastrad 113 1.3 riastrad static inline int64_t 114 1.5 riastrad timeval_to_ns(const struct timeval *tv) 115 1.3 riastrad { 116 1.3 riastrad return (((int64_t)tv->tv_sec * 1000000000UL) + (tv->tv_usec * 1000ul)); 117 1.3 riastrad } 118 1.3 riastrad 119 1.2 riastrad static inline struct timespec 120 1.2 riastrad timespec_sub(struct timespec a, struct timespec b) 121 1.2 riastrad { 122 1.2 riastrad struct timespec d; 123 1.2 riastrad 124 1.2 riastrad timespecsub(&a, &b, &d); 125 1.2 riastrad 126 1.2 riastrad return d; 127 1.2 riastrad } 128 1.2 riastrad 129 1.2 riastrad static inline void 130 1.2 riastrad set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec) 131 1.2 riastrad { 132 1.2 riastrad while (nsec >= 1000000000L) { 133 1.2 riastrad nsec -= 1000000000L; 134 1.2 riastrad sec += 1; 135 1.2 riastrad } 136 1.2 riastrad while (nsec < 0) { 137 1.2 riastrad nsec += 1000000000L; 138 1.2 riastrad sec -= 1; 139 1.2 riastrad } 140 1.2 riastrad ts->tv_sec = sec; 141 1.2 riastrad ts->tv_nsec = nsec; 142 1.2 riastrad } 143 1.2 riastrad 144 1.2 riastrad #endif /* _LINUX_TIME_H_ */ 145
Indexes created Thu Oct 02 14:10:14 GMT 2025