| 1 | /* $NetBSD: ktime.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_KTIME_H_ |
| 33 | #define _LINUX_KTIME_H_ |
| 34 | |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/endian.h> |
| 37 | #include <sys/time.h> |
| 38 | |
| 39 | #include <linux/time.h> |
| 40 | |
| 41 | union ktime { |
| 42 | int64_t kt_nsec; |
| 43 | struct { |
| 44 | #if _BYTE_ORDER == _BIG_ENDIAN |
| 45 | int32_t ktsn_sec; |
| 46 | int32_t ktsn_nsec; |
| 47 | #else |
| 48 | int32_t ktsn_nsec; |
| 49 | int32_t ktsn_sec; |
| 50 | #endif |
| 51 | } kt_sec_nsec; |
| 52 | }; |
| 53 | |
| 54 | typedef union ktime ktime_t; |
| 55 | |
| 56 | static inline ktime_t |
| 57 | ktime_add_ns(ktime_t kt, int64_t nsec) |
| 58 | { |
| 59 | return (ktime_t) { .kt_nsec = (kt.kt_nsec + nsec) }; |
| 60 | } |
| 61 | |
| 62 | static inline int64_t |
| 63 | ktime_to_ns(ktime_t kt) |
| 64 | { |
| 65 | return kt.kt_nsec; |
| 66 | } |
| 67 | |
| 68 | static inline ktime_t |
| 69 | ns_to_ktime(int64_t nsec) |
| 70 | { |
| 71 | ktime_t kt; |
| 72 | |
| 73 | kt.kt_nsec = nsec; |
| 74 | |
| 75 | return kt; |
| 76 | } |
| 77 | |
| 78 | static inline ktime_t |
| 79 | ktime_sub(ktime_t a, ktime_t b) |
| 80 | { |
| 81 | return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b)); |
| 82 | } |
| 83 | |
| 84 | static inline ktime_t |
| 85 | ktime_sub_ns(ktime_t a, int64_t nsec) |
| 86 | { |
| 87 | return ns_to_ktime(ktime_to_ns(a) - nsec); |
| 88 | } |
| 89 | |
| 90 | static inline struct timespec |
| 91 | ktime_to_timespec(ktime_t kt) |
| 92 | { |
| 93 | return ns_to_timespec(ktime_to_ns(kt)); |
| 94 | } |
| 95 | |
| 96 | static inline struct timeval |
| 97 | ktime_to_timeval(ktime_t kt) |
| 98 | { |
| 99 | return ns_to_timeval(ktime_to_ns(kt)); |
| 100 | } |
| 101 | |
| 102 | static inline ktime_t |
| 103 | ktime_get(void) |
| 104 | { |
| 105 | struct timespec ts; |
| 106 | ktime_t kt; |
| 107 | |
| 108 | /* XXX nanotime or nanouptime? */ |
| 109 | nanouptime(&ts); |
| 110 | |
| 111 | /* XXX Silently truncate? */ |
| 112 | kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL; |
| 113 | kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec; |
| 114 | |
| 115 | return kt; |
| 116 | } |
| 117 | |
| 118 | static inline ktime_t |
| 119 | ktime_get_monotonic_offset(void) |
| 120 | { |
| 121 | return ns_to_ktime(0); /* XXX Obviously wrong! Revisit. */ |
| 122 | } |
| 123 | |
| 124 | static inline bool |
| 125 | time_in_range(unsigned long x, unsigned long a, unsigned long b) |
| 126 | { |
| 127 | return ((a <= x) && (x <= b)); |
| 128 | } |
| 129 | |
| 130 | #endif /* _LINUX_KTIME_H_ */ |
| 131 | |