booster/refcounted.h

//
//  Copyright (C) 2008-2012 Artyom Beilis (Tonkikh)
//
//  Distributed under the Boost Software License, Version 1.0. (See
//  accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)
//                                                                             
#ifndef BOOSTER_REFCOUNTED_H
#define BOOSTER_REFCOUNTED_H

#include <booster/atomic_counter.h>

namespace booster {

        class refcounted;
        void intrusive_ptr_add_ref(refcounted *ptr);
        void intrusive_ptr_release(refcounted *ptr);

        class refcounted {
        public:
                refcounted() :
                        refs_(0)
                {
                }

                virtual ~refcounted()
                {
                }

        private:
                friend void intrusive_ptr_add_ref(refcounted *);
                friend void intrusive_ptr_release(refcounted *);
        
                refcounted(refcounted const &other);
                refcounted const &operator=(refcounted const &other);
                atomic_counter refs_;
        };

        inline void intrusive_ptr_add_ref(refcounted *p)
        {
                ++p->refs_;
        }
        inline void intrusive_ptr_release(refcounted *p)
        {
                if(p && --p->refs_ == 0)
                        delete p;
        }

}


#endif