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 #ifndef _LINUXKPI_LINUX_TIME_H_ 27 #define _LINUXKPI_LINUX_TIME_H_ 28 29 #define MSEC_PER_SEC 1000L 30 31 #define NSEC_PER_USEC 1000L 32 #define NSEC_PER_MSEC 1000000L 33 #define NSEC_PER_SEC 1000000000L 34 35 #define USEC_PER_MSEC 1000L 36 #define USEC_PER_SEC 1000000L 37 38 #define timespec64 timespec 39 40 #include <sys/time.h> 41 #include <sys/stdint.h> 42 43 #include <linux/math64.h> 44 45 static inline struct timeval 46 ns_to_timeval(const int64_t nsec) 47 { 48 struct timeval tv; 49 long rem; 50 51 if (nsec == 0) { 52 tv.tv_sec = 0; 53 tv.tv_usec = 0; 54 return (tv); 55 } 56 57 tv.tv_sec = nsec / NSEC_PER_SEC; 58 rem = nsec % NSEC_PER_SEC; 59 if (rem < 0) { 60 tv.tv_sec--; 61 rem += NSEC_PER_SEC; 62 } 63 tv.tv_usec = rem / 1000; 64 return (tv); 65 } 66 67 static inline int64_t 68 timeval_to_ns(const struct timeval *tv) 69 { 70 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) + 71 tv->tv_usec * NSEC_PER_USEC; 72 } 73 74 #define getrawmonotonic(ts) nanouptime(ts) 75 76 static inline struct timespec 77 timespec_sub(struct timespec lhs, struct timespec rhs) 78 { 79 struct timespec ts; 80 81 timespecsub(&lhs, &rhs, &ts); 82 83 return ts; 84 } 85 86 static inline void 87 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec) 88 { 89 /* XXX: this doesn't actually normalize anything */ 90 ts->tv_sec = sec; 91 ts->tv_nsec = nsec; 92 } 93 94 static inline int64_t 95 timespec_to_ns(const struct timespec *ts) 96 { 97 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec); 98 } 99 100 static inline struct timespec 101 ns_to_timespec(const int64_t nsec) 102 { 103 struct timespec ts; 104 int32_t rem; 105 106 if (nsec == 0) { 107 ts.tv_sec = 0; 108 ts.tv_nsec = 0; 109 return (ts); 110 } 111 112 ts.tv_sec = nsec / NSEC_PER_SEC; 113 rem = nsec % NSEC_PER_SEC; 114 if (rem < 0) { 115 ts.tv_sec--; 116 rem += NSEC_PER_SEC; 117 } 118 ts.tv_nsec = rem; 119 return (ts); 120 } 121 122 #define ns_to_timespec64(_x) ns_to_timespec(_x) 123 124 static inline int 125 timespec_valid(const struct timespec *ts) 126 { 127 if (ts->tv_sec < 0 || ts->tv_sec > 100000000 || 128 ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000) 129 return (0); 130 return (1); 131 } 132 133 static inline unsigned long 134 get_seconds(void) 135 { 136 return time_uptime; 137 } 138 139 #endif /* _LINUXKPI_LINUX_TIME_H_ */ 140