include/os/freebsd/spl/sys/time.h

   1 /*
   2  * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
   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, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #ifndef _OPENSOLARIS_SYS_TIME_H_
  28 #define _OPENSOLARIS_SYS_TIME_H_
  29 #pragma once
  30 #include_next <sys/time.h>
  31 #include <sys/debug.h>
  32 #ifndef _SYS_KERNEL_H_
  33 extern int hz;
  34 #endif
  35
  36 #define SEC             1
  37 #define MILLISEC        1000UL
  38 #define MICROSEC        1000000UL
  39 #define NANOSEC 1000000000UL
  40 #define TIME_MAX        LLONG_MAX
  41
  42 #define MSEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MILLISEC))
  43 #define NSEC2MSEC(n)    ((n) / (NANOSEC / MILLISEC))
  44
  45 #define USEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MICROSEC))
  46 #define NSEC2USEC(n)    ((n) / (NANOSEC / MICROSEC))
  47
  48 #define NSEC2SEC(n)     ((n) / (NANOSEC / SEC))
  49 #define SEC2NSEC(m)     ((hrtime_t)(m) * (NANOSEC / SEC))
  50
  51 typedef longlong_t      hrtime_t;
  52
  53 #if defined(__i386__) || defined(__powerpc__)
  54 #define TIMESPEC_OVERFLOW(ts)                                           \
  55         ((ts)->tv_sec < INT32_MIN || (ts)->tv_sec > INT32_MAX)
  56 #else
  57 #define TIMESPEC_OVERFLOW(ts)                                           \
  58         ((ts)->tv_sec < INT64_MIN || (ts)->tv_sec > INT64_MAX)
  59 #endif
  60
  61 #define SEC_TO_TICK(sec)        ((sec) * hz)
  62 #define NSEC_TO_TICK(nsec)      ((nsec) / (NANOSEC / hz))
  63
  64 static __inline hrtime_t
  65 gethrtime(void)
  66 {
  67         struct timespec ts;
  68         hrtime_t nsec;
  69
  70         nanouptime(&ts);
  71         nsec = ((hrtime_t)ts.tv_sec * NANOSEC) + ts.tv_nsec;
  72         return (nsec);
  73 }
  74
  75 #define gethrestime_sec()       (time_second)
  76 #define gethrestime(ts)         getnanotime(ts)
  77 #define gethrtime_waitfree()    gethrtime()
  78
  79 extern int nsec_per_tick;       /* nanoseconds per clock tick */
  80
  81 #define ddi_get_lbolt64()                               \
  82         (int64_t)(((getsbinuptime() >> 16) * hz) >> 16)
  83 #define ddi_get_lbolt()         (clock_t)ddi_get_lbolt64()
  84
  85 #else
  86
  87 static __inline hrtime_t
  88 gethrtime(void)
  89 {
  90         struct timespec ts;
  91         clock_gettime(CLOCK_UPTIME, &ts);
  92         return (((uint64_t)ts.tv_sec) * NANOSEC + ts.tv_nsec);
  93 }
  94 #endif  /* !_OPENSOLARIS_SYS_TIME_H_ */