1//
2// detail/shared_ptr.hpp
3// ~~~~~~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6//
7// Distributed under the Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9//
10
11#ifndef BOOST_ASIO_DETAIL_SHARED_PTR_HPP
12#define BOOST_ASIO_DETAIL_SHARED_PTR_HPP
13
14#if defined(_MSC_VER) && (_MSC_VER >= 1200)
15# pragma once
16#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
17
18#include <boost/asio/detail/config.hpp>
19
20#if defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
21# include <memory>
22#else // defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
23# include <boost/shared_ptr.hpp>
24#endif // defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
25
26namespace boost {
27namespace asio {
28namespace detail {
29
30#if defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
31using std::shared_ptr;
32#else // defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
33using boost::shared_ptr;
34#endif // defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
35
36} // namespace detail
37} // namespace asio
38} // namespace boost
39
40#endif // BOOST_ASIO_DETAIL_SHARED_PTR_HPP
41

source code of boost/boost/asio/detail/shared_ptr.hpp