1 /* 2 * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_KTIME_H_ 28 #define _LINUX_KTIME_H_ 29 30 #include <linux/time.h> 31 #include <linux/jiffies.h> 32 33 /* time values in nanoseconds */ 34 typedef s64 ktime_t; 35 36 static inline ktime_t 37 ktime_set(const s64 secs, const unsigned long nsecs) 38 { 39 return (secs * NSEC_PER_SEC) + (s64)nsecs; 40 } 41 42 static inline s64 43 ktime_to_us(const ktime_t kt) 44 { 45 return kt / NSEC_PER_USEC; 46 } 47 48 static inline s64 49 ktime_us_delta(const ktime_t later, const ktime_t earlier) 50 { 51 return later - earlier; 52 } 53 54 static inline int64_t ktime_to_ns(ktime_t kt) 55 { 56 return kt; 57 } 58 59 static inline struct timeval ktime_to_timeval(ktime_t kt) 60 { 61 return ns_to_timeval(kt); 62 } 63 64 static inline ktime_t ktime_add_ns(ktime_t kt, int64_t ns) 65 { 66 return kt + ns; 67 } 68 69 static inline ktime_t 70 ktime_add_ms(const ktime_t kt, const u64 ms) 71 { 72 return ktime_add_ns(kt, NSEC_PER_MSEC * ms); 73 } 74 75 static inline ktime_t ktime_sub_ns(ktime_t kt, int64_t ns) 76 { 77 return kt - ns; 78 } 79 80 static inline ktime_t ktime_get(void) 81 { 82 struct timespec ts; 83 84 nanouptime(&ts); 85 return (ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec; 86 } 87 88 static inline ktime_t 89 ktime_sub(ktime_t lhs, ktime_t rhs) 90 { 91 return lhs - rhs; 92 } 93 94 static inline ktime_t 95 ns_to_ktime(u64 ns) 96 { 97 return ns; 98 } 99 100 static inline bool 101 ktime_before(const ktime_t cmp1, const ktime_t cmp2) 102 { 103 return (cmp1 < cmp2); 104 } 105 106 static inline bool 107 ktime_after(const ktime_t cmp1, const ktime_t cmp2) 108 { 109 return (cmp1 > cmp2); 110 } 111 112 #define ktime_to_timespec64(kt) ns_to_timespec((kt)) 113 114 #include <linux/timekeeping.h> 115 116 #endif /* _LINUX_KTIME_H_ */ 117