include/os/linux/spl/sys/callo.h

   1 /*
   2  *  Copyright (C) 2007-2013 Lawrence Livermore National Security, LLC.
   3  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   4  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   5  *  UCRL-CODE-235197
   6  *
   7  *  This file is part of the SPL, Solaris Porting Layer.
   8  *
   9  *  The SPL is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License as published by the
  11  *  Free Software Foundation; either version 2 of the License, or (at your
  12  *  option) any later version.
  13  *
  14  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  15  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17  *  for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License along
  20  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #ifndef _SPL_CALLO_H
  24 #define _SPL_CALLO_H
  25
  26 /*
  27  * Callout flags:
  28  *
  29  * CALLOUT_FLAG_ROUNDUP
  30  *      Roundup the expiration time to the next resolution boundary.
  31  *      If this flag is not specified, the expiration time is rounded down.
  32  * CALLOUT_FLAG_ABSOLUTE
  33  *      Normally, the expiration passed to the timeout API functions is an
  34  *      expiration interval. If this flag is specified, then it is
  35  *      interpreted as the expiration time itself.
  36  * CALLOUT_FLAG_HRESTIME
  37  *      Normally, callouts are not affected by changes to system time
  38  *      (hrestime). This flag is used to create a callout that is affected
  39  *      by system time. If system time changes, these timers must be
  40  *      handled in a special way (see callout.c). These are used by condition
  41  *      variables and LWP timers that need this behavior.
  42  * CALLOUT_FLAG_32BIT
  43  *      Legacy interfaces timeout() and realtime_timeout() pass this flag
  44  *      to timeout_generic() to indicate that a 32-bit ID should be allocated.
  45  */
  46 #define CALLOUT_FLAG_ROUNDUP            0x1
  47 #define CALLOUT_FLAG_ABSOLUTE           0x2
  48 #define CALLOUT_FLAG_HRESTIME           0x4
  49 #define CALLOUT_FLAG_32BIT              0x8
  50
  51 #endif  /* _SPL_CALLB_H */