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