| 1 | /* $NetBSD: time.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2013 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Taylor R. Campbell. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #ifndef _LINUX_TIME_H_ |
| 33 | #define _LINUX_TIME_H_ |
| 34 | |
| 35 | #include <sys/time.h> |
| 36 | |
| 37 | /* |
| 38 | * XXX get_seconds as implemented by Linux is a Y2038 bug waiting to |
| 39 | * happen on 32-bit systems because it returns unsigned long. Some |
| 40 | * callers in Linux (implicitly) convert the result to time_t, though. |
| 41 | * We'll pretend get_seconds returns time_t and make sure all our |
| 42 | * callers treat it as if it did. |
| 43 | */ |
| 44 | |
| 45 | static inline time_t |
| 46 | get_seconds(void) |
| 47 | { |
| 48 | return time_second; |
| 49 | } |
| 50 | |
| 51 | static inline void |
| 52 | getrawmonotonic(struct timespec *ts) |
| 53 | { |
| 54 | getnanouptime(ts); |
| 55 | } |
| 56 | |
| 57 | static inline void |
| 58 | do_gettimeofday(struct timeval *tv) |
| 59 | { |
| 60 | microtime(tv); |
| 61 | } |
| 62 | |
| 63 | static inline bool |
| 64 | timespec_valid(const struct timespec *ts) |
| 65 | { |
| 66 | if (ts->tv_sec < 0) |
| 67 | return false; |
| 68 | if (1000000000L <= ts->tv_nsec) |
| 69 | return false; |
| 70 | return true; |
| 71 | } |
| 72 | |
| 73 | static inline struct timespec |
| 74 | ns_to_timespec(const int64_t nsec) |
| 75 | { |
| 76 | struct timespec ts; |
| 77 | |
| 78 | ts.tv_sec = (nsec / 1000000000L); |
| 79 | ts.tv_nsec = (nsec % 1000000000L); |
| 80 | if (ts.tv_nsec < 0) { |
| 81 | ts.tv_sec -= 1; |
| 82 | ts.tv_nsec += 1000000000L; |
| 83 | } |
| 84 | |
| 85 | return ts; |
| 86 | } |
| 87 | |
| 88 | static inline int64_t |
| 89 | timespec_to_ns(const struct timespec *ts) |
| 90 | { |
| 91 | return (((int64_t)ts->tv_sec * 1000000000LL) + ts->tv_nsec); |
| 92 | } |
| 93 | |
| 94 | static inline struct timeval |
| 95 | ns_to_timeval(int64_t nsec) |
| 96 | { |
| 97 | struct timespec ts; |
| 98 | struct timeval tv; |
| 99 | |
| 100 | ts = ns_to_timespec(nsec); |
| 101 | TIMESPEC_TO_TIMEVAL(&tv, &ts); |
| 102 | |
| 103 | return tv; |
| 104 | } |
| 105 | |
| 106 | static inline int64_t |
| 107 | timeval_to_ns(struct timeval *tv) |
| 108 | { |
| 109 | return (((int64_t)tv->tv_sec * 1000000000UL) + (tv->tv_usec * 1000ul)); |
| 110 | } |
| 111 | |
| 112 | static inline struct timespec |
| 113 | timespec_sub(struct timespec a, struct timespec b) |
| 114 | { |
| 115 | struct timespec d; |
| 116 | |
| 117 | timespecsub(&a, &b, &d); |
| 118 | |
| 119 | return d; |
| 120 | } |
| 121 | |
| 122 | static inline void |
| 123 | set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec) |
| 124 | { |
| 125 | while (nsec >= 1000000000L) { |
| 126 | nsec -= 1000000000L; |
| 127 | sec += 1; |
| 128 | } |
| 129 | while (nsec < 0) { |
| 130 | nsec += 1000000000L; |
| 131 | sec -= 1; |
| 132 | } |
| 133 | ts->tv_sec = sec; |
| 134 | ts->tv_nsec = nsec; |
| 135 | } |
| 136 | |
| 137 | #endif /* _LINUX_TIME_H_ */ |
| 138 | |