1 /* $NetBSD: ktime.h,v 1.2 2014/03/18 18:20:43 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 union ktime { 40 int64_t kt_nsec; 41 struct { 42 #if _BYTE_ORDER == _BIG_ENDIAN 43 int32_t ktsn_sec; 44 int32_t ktsn_nsec; 45 #else 46 int32_t ktsn_nsec; 47 int32_t ktsn_sec; 48 #endif 49 } kt_sec_nsec; 50 }; 51 52 typedef union ktime ktime_t; 53 54 static inline int64_t 55 ktime_to_ns(ktime_t kt) 56 { 57 return kt.kt_nsec; 58 } 59 60 static inline ktime_t 61 ns_to_ktime(int64_t nsec) 62 { 63 ktime_t kt; 64 65 kt.kt_nsec = nsec; 66 67 return kt; 68 } 69 70 static inline ktime_t 71 ktime_sub(ktime_t a, ktime_t b) 72 { 73 return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b)); 74 } 75 76 static inline ktime_t 77 ktime_sub_ns(ktime_t a, int64_t nsec) 78 { 79 return ns_to_ktime(ktime_to_ns(a) - nsec); 80 } 81 82 static inline int64_t 83 timespec_to_ns(struct timespec *t) 84 { 85 return (t->tv_sec * 1000000000ul) + t->tv_nsec; 86 } 87 88 static inline int64_t 89 timeval_to_ns(struct timeval *tv) 90 { 91 return (tv->tv_sec * 1000000000ul) + (tv->tv_usec * 1000ul); 92 } 93 94 static inline struct timespec 95 ns_to_timespec(int64_t nsec) 96 { 97 struct timespec t; 98 99 t.tv_sec = (nsec / 1000000000ul); 100 t.tv_nsec = (nsec % 1000000000ul); 101 102 return t; 103 } 104 105 static inline struct timeval 106 ns_to_timeval(int64_t nsec) 107 { 108 struct timespec ts; 109 struct timeval tv; 110 111 ts = ns_to_timespec(nsec); 112 TIMESPEC_TO_TIMEVAL(&tv, &ts); 113 114 return tv; 115 } 116 117 static inline struct timespec 118 ktime_to_timespec(ktime_t kt) 119 { 120 return ns_to_timespec(ktime_to_ns(kt)); 121 } 122 123 static inline struct timeval 124 ktime_to_timeval(ktime_t kt) 125 { 126 return ns_to_timeval(ktime_to_ns(kt)); 127 } 128 129 static inline ktime_t 130 ktime_get(void) 131 { 132 struct timespec ts; 133 ktime_t kt; 134 135 /* XXX nanotime or nanouptime? */ 136 nanouptime(&ts); 137 138 /* XXX Silently truncate? */ 139 kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL; 140 kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec; 141 142 return kt; 143 } 144 145 static inline ktime_t 146 ktime_get_monotonic_offset(void) 147 { 148 return ns_to_ktime(0); /* XXX Obviously wrong! Revisit. */ 149 } 150 151 #endif /* _LINUX_KTIME_H_ */ 152