1 /*- 2 * Copyright (c) 2014-2015 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 * $FreeBSD$ 27 */ 28 #ifndef _LINUX_TIME_H_ 29 #define _LINUX_TIME_H_ 30 31 #define NSEC_PER_USEC 1000L 32 #define NSEC_PER_MSEC 1000000L 33 #define NSEC_PER_SEC 1000000000L 34 35 #include <sys/time.h> 36 #include <sys/stdint.h> 37 38 static inline struct timeval 39 ns_to_timeval(const int64_t nsec) 40 { 41 struct timeval tv; 42 long rem; 43 44 if (nsec == 0) { 45 tv.tv_sec = 0; 46 tv.tv_usec = 0; 47 return (tv); 48 } 49 50 tv.tv_sec = nsec / NSEC_PER_SEC; 51 rem = nsec % NSEC_PER_SEC; 52 if (rem < 0) { 53 tv.tv_sec--; 54 rem += NSEC_PER_SEC; 55 } 56 tv.tv_usec = rem / 1000; 57 return (tv); 58 } 59 60 static inline int64_t 61 timeval_to_ns(const struct timeval *tv) 62 { 63 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) + 64 tv->tv_usec * NSEC_PER_USEC; 65 } 66 67 #define getrawmonotonic(ts) nanouptime(ts) 68 69 static inline struct timespec 70 timespec_sub(struct timespec lhs, struct timespec rhs) 71 { 72 struct timespec ts; 73 74 ts.tv_sec = lhs.tv_sec; 75 ts.tv_nsec = lhs.tv_nsec; 76 timespecsub(&ts, &rhs); 77 78 return ts; 79 } 80 81 static inline void 82 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec) 83 { 84 /* XXX: this doesn't actually normalize anything */ 85 ts->tv_sec = sec; 86 ts->tv_nsec = nsec; 87 } 88 89 static inline int64_t 90 timespec_to_ns(const struct timespec *ts) 91 { 92 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec); 93 } 94 95 static inline struct timespec 96 ns_to_timespec(const int64_t nsec) 97 { 98 struct timespec ts; 99 int32_t rem; 100 101 if (nsec == 0) { 102 ts.tv_sec = 0; 103 ts.tv_nsec = 0; 104 return (ts); 105 } 106 107 ts.tv_sec = nsec / NSEC_PER_SEC; 108 rem = nsec % NSEC_PER_SEC; 109 if (rem < 0) { 110 ts.tv_sec--; 111 rem += NSEC_PER_SEC; 112 } 113 ts.tv_nsec = rem; 114 return (ts); 115 } 116 117 static inline int 118 timespec_valid(const struct timespec *ts) 119 { 120 if (ts->tv_sec < 0 || ts->tv_sec > 100000000 || 121 ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000) 122 return (0); 123 return (1); 124 } 125 126 static inline unsigned long 127 get_seconds(void) 128 { 129 return time_uptime; 130 } 131 132 #endif /* _LINUX_TIME_H_ */ 133