time.h

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    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 _LINUXKPI_LINUX_TIME_H_
   29 #define _LINUXKPI_LINUX_TIME_H_
   30 
   31 #define MSEC_PER_SEC    1000L
   32 
   33 #define NSEC_PER_USEC   1000L
   34 #define NSEC_PER_MSEC   1000000L
   35 #define NSEC_PER_SEC    1000000000L
   36 
   37 #define USEC_PER_MSEC   1000L
   38 #define USEC_PER_SEC    1000000L
   39 
   40 #define timespec64 timespec
   41 
   42 #include <sys/time.h>
   43 #include <sys/stdint.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 static inline int
  123 timespec_valid(const struct timespec *ts)
  124 {
  125         if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
  126             ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
  127                 return (0);
  128         return (1);
  129 }
  130 
  131 static inline unsigned long
  132 get_seconds(void)
  133 {
  134         return time_uptime;
  135 }
  136 
  137 #endif /* _LINUXKPI_LINUX_TIME_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/compat/linuxkpi/common/include/linux/time.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/time.h