include/sys/time.h

   1 /*****************************************************************************\
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23 \*****************************************************************************/
  24
  25 #ifndef _SPL_TIME_H
  26 #define _SPL_TIME_H
  27
  28 #include <linux/module.h>
  29 #include <linux/time.h>
  30 #include <sys/types.h>
  31 #include <sys/timer.h>
  32
  33 #if defined(CONFIG_64BIT)
  34 #define TIME_MAX                        INT64_MAX
  35 #define TIME_MIN                        INT64_MIN
  36 #else
  37 #define TIME_MAX                        INT32_MAX
  38 #define TIME_MIN                        INT32_MIN
  39 #endif
  40
  41 #define SEC                             1
  42 #define MILLISEC                        1000
  43 #define MICROSEC                        1000000
  44 #define NANOSEC                         1000000000
  45
  46 #define MSEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MILLISEC))
  47 #define NSEC2MSEC(n)    ((n) / (NANOSEC / MILLISEC))
  48
  49 static const int hz = HZ;
  50
  51 #define TIMESPEC_OVERFLOW(ts)           \
  52         ((ts)->tv_sec < TIME_MIN || (ts)->tv_sec > TIME_MAX)
  53
  54 static inline void
  55 gethrestime(timestruc_t *now)
  56 {
  57         *now = current_kernel_time();
  58 }
  59
  60 static inline time_t
  61 gethrestime_sec(void)
  62 {
  63         struct timespec ts;
  64         ts = current_kernel_time();
  65         return (ts.tv_sec);
  66 }
  67
  68 static inline hrtime_t
  69 gethrtime(void)
  70 {
  71         struct timespec now;
  72         getrawmonotonic(&now);
  73         return (((hrtime_t)now.tv_sec * NSEC_PER_SEC) + now.tv_nsec);
  74 }
  75
  76 #endif  /* _SPL_TIME_H */