include/vrvCore/DtWriteSettingsLock.h

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/******************************************************************************
** Copyright (c) 2009 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/
/******************************************************************************
** $RCSfile: DtWriteSettingsLock.h,v $ $Revision: 1.6 $ $State: Exp $
******************************************************************************/


#ifndef DtWriteSettingsLock_H_
#define DtWriteSettingsLock_H_

#include <vrvCore/vrvCore.h>
#include <vrvCore/DtSharedSettingsManager.h>

#include <boost/thread/shared_mutex.hpp>
#include <boost/thread/locks.hpp>

namespace makVrv
{
   class DtSharedSettingsManager;

   template <typename SettingsClass>
   class DtWriteSettingsLock
   {
   public:

      //Acquired an instance of the SettingsClass with a read lock.
      DtWriteSettingsLock(DtSharedSettingsManager& manager);

      //release the lock on the object.
      ~DtWriteSettingsLock();

      //Access the instance using pointer notation.
      inline SettingsClass* operator->() { return myObject; }

      //Access the instance using deref notation.
      inline SettingsClass& operator*() { return *myObject; }

   private:
      //Not copyable or assignable.
      DtWriteSettingsLock(const DtWriteSettingsLock&);
      DtWriteSettingsLock& operator=(const DtWriteSettingsLock&);

   private:
      DtSharedSettingsManager& myManager;
      SettingsClass* myObject;

      boost::shared_lock<boost::shared_mutex> myManagerLock;
      boost::unique_lock<boost::shared_mutex> myObjectLock;

   };
}

#define DtWriteSettingsLock_INL_
#include <vrvCore/DtWriteSettingsLock.inl>
#undef DtWriteSettingsLock_INL_

#endif