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 typedef int64_t time64_t; 46 47 /* Copied from `include/time.h` (userland). */ 48 struct tm { 49 int tm_sec; /* seconds after the minute [0-60] */ 50 int tm_min; /* minutes after the hour [0-59] */ 51 int tm_hour; /* hours since midnight [0-23] */ 52 int tm_mday; /* day of the month [1-31] */ 53 int tm_mon; /* months since January [0-11] */ 54 int tm_year; /* years since 1900 */ 55 int tm_wday; /* days since Sunday [0-6] */ 56 int tm_yday; /* days since January 1 [0-365] */ 57 int tm_isdst; /* Daylight Savings Time flag */ 58 long tm_gmtoff; /* offset from UTC in seconds */ 59 char *tm_zone; /* timezone abbreviation */ 60 }; 61 62 static inline struct timeval 63 ns_to_timeval(const int64_t nsec) 64 { 65 struct timeval tv; 66 long rem; 67 68 if (nsec == 0) { 69 tv.tv_sec = 0; 70 tv.tv_usec = 0; 71 return (tv); 72 } 73 74 tv.tv_sec = nsec / NSEC_PER_SEC; 75 rem = nsec % NSEC_PER_SEC; 76 if (rem < 0) { 77 tv.tv_sec--; 78 rem += NSEC_PER_SEC; 79 } 80 tv.tv_usec = rem / 1000; 81 return (tv); 82 } 83 84 static inline int64_t 85 timeval_to_ns(const struct timeval *tv) 86 { 87 return ((int64_t)tv->tv_sec * NSEC_PER_SEC) + 88 tv->tv_usec * NSEC_PER_USEC; 89 } 90 91 #define getrawmonotonic(ts) nanouptime(ts) 92 93 static inline struct timespec 94 timespec_sub(struct timespec lhs, struct timespec rhs) 95 { 96 struct timespec ts; 97 98 timespecsub(&lhs, &rhs, &ts); 99 100 return ts; 101 } 102 103 static inline void 104 set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec) 105 { 106 /* XXX: this doesn't actually normalize anything */ 107 ts->tv_sec = sec; 108 ts->tv_nsec = nsec; 109 } 110 111 static inline int64_t 112 timespec_to_ns(const struct timespec *ts) 113 { 114 return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec); 115 } 116 117 static inline struct timespec 118 ns_to_timespec(const int64_t nsec) 119 { 120 struct timespec ts; 121 int32_t rem; 122 123 if (nsec == 0) { 124 ts.tv_sec = 0; 125 ts.tv_nsec = 0; 126 return (ts); 127 } 128 129 ts.tv_sec = nsec / NSEC_PER_SEC; 130 rem = nsec % NSEC_PER_SEC; 131 if (rem < 0) { 132 ts.tv_sec--; 133 rem += NSEC_PER_SEC; 134 } 135 ts.tv_nsec = rem; 136 return (ts); 137 } 138 139 #define ns_to_timespec64(_x) ns_to_timespec(_x) 140 141 static inline int 142 timespec_valid(const struct timespec *ts) 143 { 144 if (ts->tv_sec < 0 || ts->tv_sec > 100000000 || 145 ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000) 146 return (0); 147 return (1); 148 } 149 150 static inline unsigned long 151 get_seconds(void) 152 { 153 return time_uptime; 154 } 155 156 void linuxkpi_time64_to_tm(time64_t totalsecs, int offset, struct tm *result); 157 #define time64_to_tm(totalsecs, offset, result) \ 158 linuxkpi_time64_to_tm(totalsecs, offset, result) 159 160 #endif /* _LINUXKPI_LINUX_TIME_H_ */ 161