include/sys/callb.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_CALLB_H
  26 #define _SPL_CALLB_H
  27
  28 #include <linux/module.h>
  29 #include <sys/mutex.h>
  30
  31 #define CALLB_CPR_ASSERT(cp)            ASSERT(MUTEX_HELD((cp)->cc_lockp));
  32
  33 typedef struct callb_cpr {
  34         kmutex_t        *cc_lockp;
  35 } callb_cpr_t;
  36
  37 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
  38         (cp)->cc_lockp = lockp;                                 \
  39 }
  40
  41 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
  42         CALLB_CPR_ASSERT(cp);                                   \
  43 }
  44
  45 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
  46         CALLB_CPR_ASSERT(cp);                                   \
  47 }
  48
  49 #define CALLB_CPR_EXIT(cp) {                                    \
  50         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
  51         mutex_exit((cp)->cc_lockp);                             \
  52 }
  53
  54 #endif  /* _SPL_CALLB_H */
  55