1 /* $NetBSD: ktime.h,v 1.9 2020/02/14 14:34:59 maya 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/kernel.h> 38 #include <sys/time.h> 39 40 #include <linux/jiffies.h> 41 #include <linux/time.h> 42 43 union ktime { 44 int64_t kt_nsec; 45 }; 46 47 typedef union ktime ktime_t; 48 49 static inline int64_t 50 ktime_to_ns(ktime_t kt) 51 { 52 return kt.kt_nsec; 53 } 54 55 static inline int64_t 56 ktime_to_us(ktime_t kt) 57 { 58 return ktime_to_ns(kt)/1000; 59 } 60 61 static inline ktime_t 62 ns_to_ktime(int64_t nsec) 63 { 64 return (ktime_t) { .kt_nsec = nsec }; 65 } 66 67 static inline ktime_t 68 ktime_add_ns(ktime_t kt, int64_t nsec) 69 { 70 return ns_to_ktime(ktime_to_ns(kt) + nsec); 71 } 72 73 static inline ktime_t 74 ktime_sub(ktime_t a, ktime_t b) 75 { 76 return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b)); 77 } 78 79 static inline ktime_t 80 ktime_sub_ns(ktime_t a, int64_t nsec) 81 { 82 return ns_to_ktime(ktime_to_ns(a) - nsec); 83 } 84 85 static inline struct timespec 86 ktime_to_timespec(ktime_t kt) 87 { 88 return ns_to_timespec(ktime_to_ns(kt)); 89 } 90 91 static inline struct timeval 92 ktime_to_timeval(ktime_t kt) 93 { 94 return ns_to_timeval(ktime_to_ns(kt)); 95 } 96 97 static inline ktime_t 98 timespec_to_ktime(struct timespec ts) 99 { 100 /* XXX Silently truncate? */ 101 return ns_to_ktime(1000000000*(int64_t)ts.tv_sec + ts.tv_nsec); 102 } 103 104 static inline ktime_t 105 ktime_get(void) 106 { 107 struct timespec ts; 108 109 nanouptime(&ts); 110 111 return timespec_to_ktime(ts); 112 } 113 114 static inline ktime_t 115 ktime_get_real(void) 116 { 117 struct timespec ts; 118 119 nanotime(&ts); 120 121 return timespec_to_ktime(ts); 122 } 123 124 static inline uint64_t 125 ktime_get_raw_ns(void) 126 { 127 128 /* XXX */ 129 return ktime_to_ns(ktime_get()); 130 } 131 132 static inline ktime_t 133 ktime_get_monotonic_offset(void) 134 { 135 struct timespec ts; 136 137 getnanoboottime(&ts); 138 139 return timespec_to_ktime(ts); 140 } 141 142 static inline ktime_t 143 ktime_mono_to_real(ktime_t kt) 144 { 145 struct timespec ts = ktime_to_timespec(kt); 146 struct timespec bts; 147 148 getnanoboottime(&bts); 149 timespecadd(&ts, &bts, &ts); 150 151 return timespec_to_ktime(ts); 152 } 153 154 static inline int64_t 155 ktime_us_delta(ktime_t a, ktime_t b) 156 { 157 return ktime_to_us(ktime_sub(a, b)); 158 } 159 160 static inline bool 161 time_in_range(unsigned long x, unsigned long a, unsigned long b) 162 { 163 return ((a <= x) && (x <= b)); 164 } 165 166 #endif /* _LINUX_KTIME_H_ */ 167