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