// // detail/null_tss_ptr.hpp // ~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2010 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/config.hpp> #if !defined(BOOST_HAS_THREADS) || defined(BOOST_ASIO_DISABLE_THREADS) #include <boost/asio/detail/noncopyable.hpp> #include <boost/asio/detail/push_options.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 #include <boost/asio/detail/pop_options.hpp> #endif // !defined(BOOST_HAS_THREADS) || defined(BOOST_ASIO_DISABLE_THREADS) #endif // BOOST_ASIO_DETAIL_NULL_TSS_PTR_HPP