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 #define USEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MICROSEC))
  50 #define NSEC2USEC(n)    ((n) / (NANOSEC / MICROSEC))
  51
  52 #define NSEC2SEC(n)     ((n) / (NANOSEC / SEC))
  53 #define SEC2NSEC(m)     ((hrtime_t)(m) * (NANOSEC / SEC))
  54
  55 typedef longlong_t              hrtime_t;
  56 typedef struct timespec         timespec_t;
  57
  58 static const int hz = HZ;
  59
  60 #define TIMESPEC_OVERFLOW(ts)           \
  61         ((ts)->tv_sec < TIME_MIN || (ts)->tv_sec > TIME_MAX)
  62
  63 #if defined(HAVE_INODE_TIMESPEC64_TIMES)
  64 typedef struct timespec64       inode_timespec_t;
  65 #else
  66 typedef struct timespec         inode_timespec_t;
  67 #endif
  68
  69 static inline void
  70 gethrestime(inode_timespec_t *ts)
  71  {
  72 #if defined(HAVE_INODE_TIMESPEC64_TIMES)
  73         *ts = current_kernel_time64();
  74 #else
  75         *ts = current_kernel_time();
  76 #endif
  77 }
  78
  79 static inline time_t
  80 gethrestime_sec(void)
  81 {
  82         struct timespec ts;
  83         ts = current_kernel_time();
  84         return (ts.tv_sec);
  85 }
  86
  87 static inline hrtime_t
  88 gethrtime(void)
  89 {
  90         struct timespec ts;
  91         getrawmonotonic(&ts);
  92         return (((hrtime_t)ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec);
  93 }
  94
  95 #endif  /* _SPL_TIME_H */