RWMutexNSPR.cpp

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/****************** <VPR heading BEGIN do not edit this line> *****************
 *
 * VR Juggler Portable Runtime
 *
 * Original Authors:
 *   Allen Bierbaum, Patrick Hartling, Kevin Meinert, Carolina Cruz-Neira
 *
 * -----------------------------------------------------------------
 * File:          $RCSfile$
 * Date modified: $Date: 2005-01-01 11:48:13 -0600 (Sat, 01 Jan 2005) $
 * Version:       $Revision: 16520 $
 * -----------------------------------------------------------------
 *
 ****************** <VPR heading END do not edit this line> ******************/

/*************** <auto-copyright.pl BEGIN do not edit this line> **************
 *
 * VR Juggler is (C) Copyright 1998-2005 by Iowa State University
 *
 * Original Authors:
 *   Allen Bierbaum, Christopher Just,
 *   Patrick Hartling, Kevin Meinert,
 *   Carolina Cruz-Neira, Albert Baker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 *************** <auto-copyright.pl END do not edit this line> ***************/

#include <vpr/vprConfig.h>

#include <vpr/md/NSPR/Sync/RWMutexNSPR.h>


namespace vpr
{

vpr::ReturnStatus RWMutexNSPR::tryAcquireRead()
{
   vpr::ReturnStatus retVal(vpr::ReturnStatus::Fail);

/*
   if (stateLock.acquire().success())
   {
      if (mRefCount == -1 || numWaitingWriters >0)
      {
         retVal.setCode(vpr::ReturnStatus::Fail);
      }
      else
      {
         mRefCount++;
         retVal.setCode(vpr::ReturnStatus::Succeed);
      }
      stateLock.release();
   }
*/
   return retVal;
}

vpr::ReturnStatus RWMutexNSPR::tryAcquireWrite()
{
   vpr::ReturnStatus retVal(vpr::ReturnStatus::Fail);

/*
   if (stateLock.acquire().success())
   {
      if ( mRefCount == 0 )
      {
         mRefCount = -1;
         retVal.setCode(vpr::ReturnStatus::Succeed);
      }
      stateLock.release();
   }
*/

   return retVal;
}

} // End of vpr namespace

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