1 // 2 // detail/null_fenced_block.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2019 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_NULL_FENCED_BLOCK_HPP 12 #define BOOST_ASIO_DETAIL_NULL_FENCED_BLOCK_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/noncopyable.hpp> 19 20 #include <boost/asio/detail/push_options.hpp> 21 22 namespace boost { 23 namespace asio { 24 namespace detail { 25 26 class null_fenced_block 27 : private noncopyable 28 { 29 public: 30 enum half_or_full_t { half, full }; 31 32 // Constructor. null_fenced_block(half_or_full_t)33 explicit null_fenced_block(half_or_full_t) 34 { 35 } 36 37 // Destructor. ~null_fenced_block()38 ~null_fenced_block() 39 { 40 } 41 }; 42 43 } // namespace detail 44 } // namespace asio 45 } // namespace boost 46 47 #include <boost/asio/detail/pop_options.hpp> 48 49 #endif // BOOST_ASIO_DETAIL_NULL_FENCED_BLOCK_HPP 50