//

// null_tss_ptr.hpp

// ~~~~~~~~~~~~~~~~

//

// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)

//

// 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 BOOST_ASIO_DETAIL_NULL_TSS_PTR_HPP

#define BOOST_ASIO_DETAIL_NULL_TSS_PTR_HPP



#if defined(_MSC_VER) && (_MSC_VER >= 1200)

# pragma once

#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)



#include <boost/asio/detail/push_options.hpp>



#include <boost/asio/detail/push_options.hpp>

#include <boost/config.hpp>

#include <boost/asio/detail/pop_options.hpp>



#if !defined(BOOST_HAS_THREADS)



#include <boost/asio/detail/noncopyable.hpp>



namespace boost {

namespace asio {

namespace detail {



template <typename T>

class null_tss_ptr

  : private noncopyable

{

public:

  // Constructor.

  null_tss_ptr()

    : value_(0)

  {

  }



  // Destructor.

  ~null_tss_ptr()

  {

  }



  // Get the value.

  operator T*() const

  {

    return value_;

  }



  // Set the value.

  void operator=(T* value)

  {

    value_ = value;

  }



private:

  T* value_;

};



} // namespace detail

} // namespace asio

} // namespace boost



#endif // !defined(BOOST_HAS_THREADS)



#include <boost/asio/detail/pop_options.hpp>



#endif // BOOST_ASIO_DETAIL_NULL_TSS_PTR_HPP

