1//
2// detail/fenced_block.hpp
3// ~~~~~~~~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2024 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_FENCED_BLOCK_HPP
12#define BOOST_ASIO_DETAIL_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/config.hpp>
19
20#if !defined(BOOST_ASIO_HAS_THREADS) \
21 || defined(BOOST_ASIO_DISABLE_FENCED_BLOCK)
22# include <boost/asio/detail/null_fenced_block.hpp>
23#else
24# include <boost/asio/detail/std_fenced_block.hpp>
25#endif
26
27namespace boost {
28namespace asio {
29namespace detail {
30
31#if !defined(BOOST_ASIO_HAS_THREADS) \
32 || defined(BOOST_ASIO_DISABLE_FENCED_BLOCK)
33typedef null_fenced_block fenced_block;
34#else
35typedef std_fenced_block fenced_block;
36#endif
37
38} // namespace detail
39} // namespace asio
40} // namespace boost
41
42#endif // BOOST_ASIO_DETAIL_FENCED_BLOCK_HPP
43

source code of boost/libs/asio/include/boost/asio/detail/fenced_block.hpp