include/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  *  For details, see <http://zfsonlinux.org/>.
   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_CALLO_H
  25 #define _SPL_CALLO_H
  26
  27 /*
  28  * Callout flags:
  29  *
  30  * CALLOUT_FLAG_ROUNDUP
  31  *      Roundup the expiration time to the next resolution boundary.
  32  *      If this flag is not specified, the expiration time is rounded down.
  33  * CALLOUT_FLAG_ABSOLUTE
  34  *      Normally, the expiration passed to the timeout API functions is an
  35  *      expiration interval. If this flag is specified, then it is
  36  *      interpreted as the expiration time itself.
  37  * CALLOUT_FLAG_HRESTIME
  38  *      Normally, callouts are not affected by changes to system time
  39  *      (hrestime). This flag is used to create a callout that is affected
  40  *      by system time. If system time changes, these timers must be
  41  *      handled in a special way (see callout.c). These are used by condition
  42  *      variables and LWP timers that need this behavior.
  43  * CALLOUT_FLAG_32BIT
  44  *      Legacy interfaces timeout() and realtime_timeout() pass this flag
  45  *      to timeout_generic() to indicate that a 32-bit ID should be allocated.
  46  */
  47 #define CALLOUT_FLAG_ROUNDUP            0x1
  48 #define CALLOUT_FLAG_ABSOLUTE           0x2
  49 #define CALLOUT_FLAG_HRESTIME           0x4
  50 #define CALLOUT_FLAG_32BIT              0x8
  51
  52 #endif  /* _SPL_CALLB_H */