booster/copy_ptr.h

//
//  Copyright (C) 2009-2012 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_UTIL_COPY_PTR_H
#define BOOSTER_UTIL_COPY_PTR_H

namespace booster { 

        template<typename T>
        class copy_ptr {
                T *ptr_;
        public:
                copy_ptr() : ptr_(0) {}
                explicit copy_ptr(T *v) : ptr_(v) {}
                copy_ptr(copy_ptr const &other) :
                        ptr_(other.ptr_ ? new T(*other.ptr_) : 0)
                {
                }
                copy_ptr const &operator=(copy_ptr const &other)
                {
                        if(this != &other) {
                                copy_ptr tmp(other);
                                swap(tmp);
                        }
                        return *this;
                }
                ~copy_ptr() {
                        if(ptr_) delete ptr_;
                }

                T const *get() const { return ptr_; }
                T *get() { return ptr_; }

                T const &operator *() const { return *ptr_; }
                T &operator *() { return *ptr_; }
                T const *operator->() const { return ptr_; }
                T *operator->() { return ptr_; }
                T *release() { T *tmp=ptr_; ptr_=0; return tmp; }
                void reset(T *p=0)
                {
                        if(ptr_) delete ptr_;
                        ptr_=p;
                }
                void swap(copy_ptr &other)
                {
                        T *tmp=other.ptr_;
                        other.ptr_=ptr_;
                        ptr_=tmp;
                }
        };

} // booster

#endif