MCRefCountAccessor.h

#if !defined(__MCREFCOUNTACCESSOR_H_)
#define __MCREFCOUNTACCESSOR_H_

#ident "@(#)$Id: MCRefCountAccessor.h,v 1.7 2004/12/02 07:05:20 mike Exp $"

/*
 * Copyright Miba Consulting Ltd. (c) 2000-2003
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser 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
 *
 */

#include "mcllib/MCTypes.h"
#include "mcllib/MCRefCount.h"
#include "mcllib/MCThreadModel.h"

namespace mcllib
{
    class MCRefCountAccessorBase
    {
    protected:
        inline mcatomic_t getCnt(MCRefCount* pCtr) const
        {
            return(pCtr->m_cnt);
        }
        mcatomic_t safeIncCnt(MCRefCount* pCtr) const;
        mcatomic_t safeDecCnt(MCRefCount* pCtr) const;
        inline mcatomic_t unsafeIncCnt(MCRefCount* pCtr) const
        {
            return(++(pCtr->m_cnt));
        }
        inline mcatomic_t unsafeDecCnt(MCRefCount* pCtr) const
        {
            return(--(pCtr->m_cnt));
        }
    };

    template<MCThreadModel::EModel MODEL>
    class MCRefCountAccessorTmpl : public MCRefCountAccessorBase
    {
    public:
        mcatomic_t incCnt(MCRefCount* pCtr) const;
        mcatomic_t decCnt(MCRefCount* pCtr) const;
    };

    template<>
    class MCRefCountAccessorTmpl<MCThreadModel::THRMODELMULTI>
        : public MCRefCountAccessorBase
    {
    public:
        inline mcatomic_t incCnt(MCRefCount* pCtr) const
        {
            return(safeIncCnt(pCtr));
        }
        mcatomic_t decCnt(MCRefCount* pCtr) const
        {
            return(safeDecCnt(pCtr));
        }
    };
    typedef MCRefCountAccessorTmpl<MCThreadModel::THRMODELMULTI>
        MCRefCountAccessor;

    template<>
    class MCRefCountAccessorTmpl<MCThreadModel::THRMODELSINGLE>
        : public MCRefCountAccessorBase
    {
    public:
        inline mcatomic_t incCnt(MCRefCount* pCtr) const
        {
            return(unsafeIncCnt(pCtr));
        }
        mcatomic_t decCnt(MCRefCount* pCtr) const
        {
            return(unsafeDecCnt(pCtr));
        }
    };

    class MCRefCountGetter : public MCRefCountAccessor
    {
    public:
        MCRefCountGetter(MCRefCount* pRef);
        operator mcatomic_t();
    private:
        mcatomic_t m_cnt;
    };

};

#endif

---