include/os/linux/spl/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  *
  10  *  The SPL is free software; you can redistribute it and/or modify it
  11  *  under the terms of the GNU General Public License as published by the
  12  *  Free Software Foundation; either version 2 of the License, or (at your
  13  *  option) any later version.
  14  *
  15  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18  *  for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef _SPL_TIME_H
  25 #define _SPL_TIME_H
  26
  27 #include <linux/module.h>
  28 #include <linux/time.h>
  29 #include <sys/types.h>
  30 #include <sys/timer.h>
  31
  32 #if defined(CONFIG_64BIT)
  33 #define TIME_MAX                        INT64_MAX
  34 #define TIME_MIN                        INT64_MIN
  35 #else
  36 #define TIME_MAX                        INT32_MAX
  37 #define TIME_MIN                        INT32_MIN
  38 #endif
  39
  40 #define SEC                             1
  41 #define MILLISEC                        1000
  42 #define MICROSEC                        1000000
  43 #define NANOSEC                         1000000000
  44
  45 #define MSEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MILLISEC))
  46 #define NSEC2MSEC(n)    ((n) / (NANOSEC / MILLISEC))
  47
  48 #define USEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MICROSEC))
  49 #define NSEC2USEC(n)    ((n) / (NANOSEC / MICROSEC))
  50
  51 #define NSEC2SEC(n)     ((n) / (NANOSEC / SEC))
  52 #define SEC2NSEC(m)     ((hrtime_t)(m) * (NANOSEC / SEC))
  53
  54 static const int hz = HZ;
  55
  56 typedef longlong_t              hrtime_t;
  57 typedef struct timespec         timespec_t;
  58
  59 #define TIMESPEC_OVERFLOW(ts)           \
  60         ((ts)->tv_sec < TIME_MIN || (ts)->tv_sec > TIME_MAX)
  61
  62 #if defined(HAVE_INODE_TIMESPEC64_TIMES)
  63 typedef struct timespec64       inode_timespec_t;
  64 #else
  65 typedef struct timespec         inode_timespec_t;
  66 #endif
  67
  68 /* Include for Lustre compatibility */
  69 #define timestruc_t     inode_timespec_t
  70
  71 static inline void
  72 gethrestime(inode_timespec_t *ts)
  73 {
  74 #if defined(HAVE_INODE_TIMESPEC64_TIMES)
  75
  76 #if defined(HAVE_KTIME_GET_COARSE_REAL_TS64)
  77         ktime_get_coarse_real_ts64(ts);
  78 #else
  79         *ts = current_kernel_time64();
  80 #endif /* HAVE_KTIME_GET_COARSE_REAL_TS64 */
  81
  82 #else
  83         *ts = current_kernel_time();
  84 #endif
  85 }
  86
  87 static inline uint64_t
  88 gethrestime_sec(void)
  89 {
  90 #if defined(HAVE_INODE_TIMESPEC64_TIMES)
  91 #if defined(HAVE_KTIME_GET_COARSE_REAL_TS64)
  92         inode_timespec_t ts;
  93         ktime_get_coarse_real_ts64(&ts);
  94 #else
  95         inode_timespec_t ts = current_kernel_time64();
  96 #endif  /* HAVE_KTIME_GET_COARSE_REAL_TS64 */
  97
  98 #else
  99         inode_timespec_t ts = current_kernel_time();
 100 #endif
 101         return (ts.tv_sec);
 102 }
 103
 104 static inline hrtime_t
 105 gethrtime(void)
 106 {
 107 #if defined(HAVE_KTIME_GET_RAW_TS64)
 108         struct timespec64 ts;
 109         ktime_get_raw_ts64(&ts);
 110 #else
 111         struct timespec ts;
 112         getrawmonotonic(&ts);
 113 #endif
 114         return (((hrtime_t)ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec);
 115 }
 116
 117 #endif  /* _SPL_TIME_H */