VariableGuard.h

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//**************************************************************************/
// Copyright (c) 1998-2007 Autodesk, Inc.
// All rights reserved.
// 
// These coded instructions, statements, and computer programs contain
// unpublished proprietary information written by Autodesk, Inc., and are
// protected by Federal copyright law. They may not be disclosed to third
// parties or copied or duplicated in any form, in whole or in part, without
// the prior written consent of Autodesk, Inc.
//**************************************************************************/
// AUTHOR: Nicolas Desjardins
// DATE: 2007-05-24
//***************************************************************************/

#pragma once

#include "noncopyable.h"

namespace MaxSDK
{

    template<typename T> class VariableGuard : MaxSDK::Util::Noncopyable
    {
    public:

        VariableGuard(T& variable) :
                mVariable(variable),
                    mOriginalValue(variable)
                { }

                VariableGuard(T& variable, T value) :
                mVariable(variable),
                    mOriginalValue(variable)
                {
                    SetCurrentValue(value);
                }

                ~VariableGuard()
                {
                    mVariable = mOriginalValue;
                }

                T GetCurrentValue() const
                {
                    return mVariable;
                }

                void SetCurrentValue(T value)
                {
                    mVariable = value;
                }

    private:
        T& mVariable;
        T mOriginalValue;
    };

}