time.h revision 1.3.4.2
1 1.3.4.2 tls /* $NetBSD: time.h,v 1.3.4.2 2014/08/20 00:04:21 tls Exp $ */ 2 1.3.4.2 tls 3 1.3.4.2 tls /*- 4 1.3.4.2 tls * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.3.4.2 tls * All rights reserved. 6 1.3.4.2 tls * 7 1.3.4.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.3.4.2 tls * by Taylor R. Campbell. 9 1.3.4.2 tls * 10 1.3.4.2 tls * Redistribution and use in source and binary forms, with or without 11 1.3.4.2 tls * modification, are permitted provided that the following conditions 12 1.3.4.2 tls * are met: 13 1.3.4.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.3.4.2 tls * notice, this list of conditions and the following disclaimer. 15 1.3.4.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.4.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.3.4.2 tls * documentation and/or other materials provided with the distribution. 18 1.3.4.2 tls * 19 1.3.4.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3.4.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3.4.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3.4.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3.4.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3.4.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3.4.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3.4.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3.4.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3.4.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3.4.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.3.4.2 tls */ 31 1.3.4.2 tls 32 1.3.4.2 tls #ifndef _LINUX_TIME_H_ 33 1.3.4.2 tls #define _LINUX_TIME_H_ 34 1.3.4.2 tls 35 1.3.4.2 tls #include <sys/time.h> 36 1.3.4.2 tls 37 1.3.4.2 tls /* 38 1.3.4.2 tls * XXX get_seconds as implemented by Linux is a Y2038 bug waiting to 39 1.3.4.2 tls * happen on 32-bit systems because it returns unsigned long. Some 40 1.3.4.2 tls * callers in Linux (implicitly) convert the result to time_t, though. 41 1.3.4.2 tls * We'll pretend get_seconds returns time_t and make sure all our 42 1.3.4.2 tls * callers treat it as if it did. 43 1.3.4.2 tls */ 44 1.3.4.2 tls 45 1.3.4.2 tls static inline time_t 46 1.3.4.2 tls get_seconds(void) 47 1.3.4.2 tls { 48 1.3.4.2 tls return time_second; 49 1.3.4.2 tls } 50 1.3.4.2 tls 51 1.3.4.2 tls static inline void 52 1.3.4.2 tls getrawmonotonic(struct timespec *ts) 53 1.3.4.2 tls { 54 1.3.4.2 tls getnanouptime(ts); 55 1.3.4.2 tls } 56 1.3.4.2 tls 57 1.3.4.2 tls static inline void 58 1.3.4.2 tls do_gettimeofday(struct timeval *tv) 59 1.3.4.2 tls { 60 1.3.4.2 tls microtime(tv); 61 1.3.4.2 tls } 62 1.3.4.2 tls 63 1.3.4.2 tls static inline bool 64 1.3.4.2 tls timespec_valid(const struct timespec *ts) 65 1.3.4.2 tls { 66 1.3.4.2 tls if (ts->tv_sec < 0) 67 1.3.4.2 tls return false; 68 1.3.4.2 tls if (1000000000L <= ts->tv_nsec) 69 1.3.4.2 tls return false; 70 1.3.4.2 tls return true; 71 1.3.4.2 tls } 72 1.3.4.2 tls 73 1.3.4.2 tls static inline struct timespec 74 1.3.4.2 tls ns_to_timespec(const int64_t nsec) 75 1.3.4.2 tls { 76 1.3.4.2 tls struct timespec ts; 77 1.3.4.2 tls 78 1.3.4.2 tls ts.tv_sec = (nsec / 1000000000L); 79 1.3.4.2 tls ts.tv_nsec = (nsec % 1000000000L); 80 1.3.4.2 tls if (ts.tv_nsec < 0) { 81 1.3.4.2 tls ts.tv_sec -= 1; 82 1.3.4.2 tls ts.tv_nsec += 1000000000L; 83 1.3.4.2 tls } 84 1.3.4.2 tls 85 1.3.4.2 tls return ts; 86 1.3.4.2 tls } 87 1.3.4.2 tls 88 1.3.4.2 tls static inline int64_t 89 1.3.4.2 tls timespec_to_ns(const struct timespec *ts) 90 1.3.4.2 tls { 91 1.3.4.2 tls return (((int64_t)ts->tv_sec * 1000000000LL) + ts->tv_nsec); 92 1.3.4.2 tls } 93 1.3.4.2 tls 94 1.3.4.2 tls static inline struct timeval 95 1.3.4.2 tls ns_to_timeval(int64_t nsec) 96 1.3.4.2 tls { 97 1.3.4.2 tls struct timespec ts; 98 1.3.4.2 tls struct timeval tv; 99 1.3.4.2 tls 100 1.3.4.2 tls ts = ns_to_timespec(nsec); 101 1.3.4.2 tls TIMESPEC_TO_TIMEVAL(&tv, &ts); 102 1.3.4.2 tls 103 1.3.4.2 tls return tv; 104 1.3.4.2 tls } 105 1.3.4.2 tls 106 1.3.4.2 tls static inline int64_t 107 1.3.4.2 tls timeval_to_ns(struct timeval *tv) 108 1.3.4.2 tls { 109 1.3.4.2 tls return (((int64_t)tv->tv_sec * 1000000000UL) + (tv->tv_usec * 1000ul)); 110 1.3.4.2 tls } 111 1.3.4.2 tls 112 1.3.4.2 tls static inline struct timespec 113 1.3.4.2 tls timespec_sub(struct timespec a, struct timespec b) 114 1.3.4.2 tls { 115 1.3.4.2 tls struct timespec d; 116 1.3.4.2 tls 117 1.3.4.2 tls timespecsub(&a, &b, &d); 118 1.3.4.2 tls 119 1.3.4.2 tls return d; 120 1.3.4.2 tls } 121 1.3.4.2 tls 122 1.3.4.2 tls static inline void 123 1.3.4.2 tls set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec) 124 1.3.4.2 tls { 125 1.3.4.2 tls while (nsec >= 1000000000L) { 126 1.3.4.2 tls nsec -= 1000000000L; 127 1.3.4.2 tls sec += 1; 128 1.3.4.2 tls } 129 1.3.4.2 tls while (nsec < 0) { 130 1.3.4.2 tls nsec += 1000000000L; 131 1.3.4.2 tls sec -= 1; 132 1.3.4.2 tls } 133 1.3.4.2 tls ts->tv_sec = sec; 134 1.3.4.2 tls ts->tv_nsec = nsec; 135 1.3.4.2 tls } 136 1.3.4.2 tls 137 1.3.4.2 tls #endif /* _LINUX_TIME_H_ */ 138
Indexes created Thu Oct 02 14:10:14 GMT 2025