1 /* 2 * Copyright (c) 2014-2017 François Tigeot 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_TIME_H_ 28 #define _LINUX_TIME_H_ 29 30 #define USEC_PER_MSEC 1000L 31 #define USEC_PER_SEC 1000000L 32 33 #define NSEC_PER_USEC 1000L 34 #define NSEC_PER_MSEC 1000000L 35 #define NSEC_PER_SEC 1000000000L 36 37 #include <linux/cache.h> 38 #include <linux/math64.h> 39 40 #include <sys/time.h> 41 42 static inline struct timeval 43 ns_to_timeval(const int64_t nsec) 44 { 45 struct timeval tv; 46 long rem; 47 48 if (nsec == 0) { 49 tv.tv_sec = 0; 50 tv.tv_usec = 0; 51 return (tv); 52 } 53 54 tv.tv_sec = nsec / NSEC_PER_SEC; 55 rem = nsec % NSEC_PER_SEC; 56 if (rem < 0) { 57 tv.tv_sec--; 58 rem += NSEC_PER_SEC; 59 } 60 tv.tv_usec = rem / 1000; 61 return (tv); 62 } 63 64 static inline int64_t 65 timeval_to_ns(const struct timeval *tv) 66 { 67 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) + 68 tv->tv_usec * NSEC_PER_USEC; 69 } 70 71 #define getrawmonotonic(ts) nanouptime(ts) 72 73 static inline struct timespec 74 timespec_sub(struct timespec lhs, struct timespec rhs) 75 { 76 struct timespec ts; 77 78 timespecsub(&lhs, &rhs, &ts); 79 80 return ts; 81 } 82 83 static inline void 84 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec) 85 { 86 /* XXX: this doesn't actually normalize anything */ 87 ts->tv_sec = sec; 88 ts->tv_nsec = nsec; 89 } 90 91 static inline int64_t 92 timespec_to_ns(const struct timespec *ts) 93 { 94 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec); 95 } 96 97 static inline struct timespec 98 ns_to_timespec(const int64_t nsec) 99 { 100 struct timespec ts; 101 int32_t rem; 102 103 if (nsec == 0) { 104 ts.tv_sec = 0; 105 ts.tv_nsec = 0; 106 return (ts); 107 } 108 109 ts.tv_sec = nsec / NSEC_PER_SEC; 110 rem = nsec % NSEC_PER_SEC; 111 if (rem < 0) { 112 ts.tv_sec--; 113 rem += NSEC_PER_SEC; 114 } 115 ts.tv_nsec = rem; 116 return (ts); 117 } 118 119 static inline int 120 timespec_valid(const struct timespec *ts) 121 { 122 if (ts->tv_sec < 0 || ts->tv_sec > 100000000 || 123 ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000) 124 return (0); 125 return (1); 126 } 127 128 static inline unsigned long 129 get_seconds(void) 130 { 131 return time_uptime; 132 } 133 134 #endif /* _LINUX_TIME_H_ */ 135