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://github.com/behlendorf/spl/>.
  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 /*
  29  * Structure returned by gettimeofday(2) system call,
  30  * and used in other calls.
  31  */
  32 #include <linux/module.h>
  33 #include <linux/time.h>
  34 #include <sys/types.h>
  35 #include <sys/timer.h>
  36
  37 #if defined(CONFIG_64BIT)
  38 #define TIME_MAX                        INT64_MAX
  39 #define TIME_MIN                        INT64_MIN
  40 #else
  41 #define TIME_MAX                        INT32_MAX
  42 #define TIME_MIN                        INT32_MIN
  43 #endif
  44
  45 #define SEC                             1
  46 #define MILLISEC                        1000
  47 #define MICROSEC                        1000000
  48 #define NANOSEC                         1000000000
  49
  50 /* Already defined in include/linux/time.h */
  51 #undef CLOCK_THREAD_CPUTIME_ID
  52 #undef CLOCK_REALTIME
  53 #undef CLOCK_MONOTONIC
  54 #undef CLOCK_PROCESS_CPUTIME_ID
  55
  56 typedef enum clock_type {
  57         __CLOCK_REALTIME0 =             0,      /* obsolete; same as CLOCK_REALTIME */
  58         CLOCK_VIRTUAL =                 1,      /* thread's user-level CPU clock */
  59         CLOCK_THREAD_CPUTIME_ID =       2,      /* thread's user+system CPU clock */
  60         CLOCK_REALTIME =                3,      /* wall clock */
  61         CLOCK_MONOTONIC =               4,      /* high resolution monotonic clock */
  62         CLOCK_PROCESS_CPUTIME_ID =      5,      /* process's user+system CPU clock */
  63         CLOCK_HIGHRES =                 CLOCK_MONOTONIC,        /* alternate name */
  64         CLOCK_PROF =                    CLOCK_THREAD_CPUTIME_ID,/* alternate name */
  65 } clock_type_t;
  66
  67 #define hz                                      \
  68 ({                                              \
  69         ASSERT(HZ >= 100 && HZ <= MICROSEC);    \
  70         HZ;                                     \
  71 })
  72
  73 extern void __gethrestime(timestruc_t *);
  74 extern int __clock_gettime(clock_type_t, timespec_t *);
  75 extern hrtime_t __gethrtime(void);
  76
  77 #define gethrestime(ts)                 __gethrestime(ts)
  78 #define clock_gettime(fl, tp)           __clock_gettime(fl, tp)
  79 #define gethrtime()                     __gethrtime()
  80
  81 static __inline__ time_t
  82 gethrestime_sec(void)
  83 {
  84         timestruc_t now;
  85
  86         __gethrestime(&now);
  87         return now.tv_sec;
  88 }
  89
  90 #define TIMESPEC_OVERFLOW(ts)           \
  91         ((ts)->tv_sec < TIME_MIN || (ts)->tv_sec > TIME_MAX)
  92
  93 #endif  /* _SPL_TIME_H */