ktime.h revision 1.3
1 1.3 riastrad /* $NetBSD: ktime.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_KTIME_H_ 33 1.2 riastrad #define _LINUX_KTIME_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/types.h> 36 1.2 riastrad #include <sys/endian.h> 37 1.2 riastrad #include <sys/time.h> 38 1.2 riastrad 39 1.3 riastrad #include <linux/time.h> 40 1.3 riastrad 41 1.2 riastrad union ktime { 42 1.2 riastrad int64_t kt_nsec; 43 1.2 riastrad struct { 44 1.2 riastrad #if _BYTE_ORDER == _BIG_ENDIAN 45 1.2 riastrad int32_t ktsn_sec; 46 1.2 riastrad int32_t ktsn_nsec; 47 1.2 riastrad #else 48 1.2 riastrad int32_t ktsn_nsec; 49 1.2 riastrad int32_t ktsn_sec; 50 1.2 riastrad #endif 51 1.2 riastrad } kt_sec_nsec; 52 1.2 riastrad }; 53 1.2 riastrad 54 1.2 riastrad typedef union ktime ktime_t; 55 1.2 riastrad 56 1.3 riastrad static inline ktime_t 57 1.3 riastrad ktime_add_ns(ktime_t kt, int64_t nsec) 58 1.3 riastrad { 59 1.3 riastrad return (ktime_t) { .kt_nsec = (kt.kt_nsec + nsec) }; 60 1.3 riastrad } 61 1.3 riastrad 62 1.2 riastrad static inline int64_t 63 1.2 riastrad ktime_to_ns(ktime_t kt) 64 1.2 riastrad { 65 1.2 riastrad return kt.kt_nsec; 66 1.2 riastrad } 67 1.2 riastrad 68 1.2 riastrad static inline ktime_t 69 1.2 riastrad ns_to_ktime(int64_t nsec) 70 1.2 riastrad { 71 1.2 riastrad ktime_t kt; 72 1.2 riastrad 73 1.2 riastrad kt.kt_nsec = nsec; 74 1.2 riastrad 75 1.2 riastrad return kt; 76 1.2 riastrad } 77 1.2 riastrad 78 1.2 riastrad static inline ktime_t 79 1.2 riastrad ktime_sub(ktime_t a, ktime_t b) 80 1.2 riastrad { 81 1.2 riastrad return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b)); 82 1.2 riastrad } 83 1.2 riastrad 84 1.2 riastrad static inline ktime_t 85 1.2 riastrad ktime_sub_ns(ktime_t a, int64_t nsec) 86 1.2 riastrad { 87 1.2 riastrad return ns_to_ktime(ktime_to_ns(a) - nsec); 88 1.2 riastrad } 89 1.2 riastrad 90 1.2 riastrad static inline struct timespec 91 1.2 riastrad ktime_to_timespec(ktime_t kt) 92 1.2 riastrad { 93 1.2 riastrad return ns_to_timespec(ktime_to_ns(kt)); 94 1.2 riastrad } 95 1.2 riastrad 96 1.2 riastrad static inline struct timeval 97 1.2 riastrad ktime_to_timeval(ktime_t kt) 98 1.2 riastrad { 99 1.2 riastrad return ns_to_timeval(ktime_to_ns(kt)); 100 1.2 riastrad } 101 1.2 riastrad 102 1.2 riastrad static inline ktime_t 103 1.2 riastrad ktime_get(void) 104 1.2 riastrad { 105 1.2 riastrad struct timespec ts; 106 1.2 riastrad ktime_t kt; 107 1.2 riastrad 108 1.2 riastrad /* XXX nanotime or nanouptime? */ 109 1.2 riastrad nanouptime(&ts); 110 1.2 riastrad 111 1.2 riastrad /* XXX Silently truncate? */ 112 1.2 riastrad kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL; 113 1.2 riastrad kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec; 114 1.2 riastrad 115 1.2 riastrad return kt; 116 1.2 riastrad } 117 1.2 riastrad 118 1.2 riastrad static inline ktime_t 119 1.2 riastrad ktime_get_monotonic_offset(void) 120 1.2 riastrad { 121 1.2 riastrad return ns_to_ktime(0); /* XXX Obviously wrong! Revisit. */ 122 1.2 riastrad } 123 1.2 riastrad 124 1.3 riastrad static inline bool 125 1.3 riastrad time_in_range(unsigned long x, unsigned long a, unsigned long b) 126 1.3 riastrad { 127 1.3 riastrad return ((a <= x) && (x <= b)); 128 1.3 riastrad } 129 1.3 riastrad 130 1.2 riastrad #endif /* _LINUX_KTIME_H_ */ 131
Indexes created Wed Sep 24 05:09:52 GMT 2025