asio/detail/handler_cont_helpers.hpp

0001 //
0002 // detail/handler_cont_helpers.hpp
0003 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0004 //
0005 // Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009 //
0010
0011 #ifndef BOOST_ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP
0012 #define BOOST_ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP
0013
0014 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
0015 # pragma once
0016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
0017
0018 #include <boost/asio/detail/config.hpp>
0019 #include <boost/asio/detail/memory.hpp>
0020 #include <boost/asio/handler_continuation_hook.hpp>
0021
0022 #include <boost/asio/detail/push_options.hpp>
0023
0024 // Calls to asio_handler_is_continuation must be made from a namespace that
0025 // does not contain overloads of this function. This namespace is defined here
0026 // for that purpose.
0027 namespace boost_asio_handler_cont_helpers {
0028
0029 template <typename Context>
0030 inline bool is_continuation(Context& context)
0031 {
0032 #if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS)
0033   return false;
0034 #else
0035   using boost::asio::asio_handler_is_continuation;
0036   return asio_handler_is_continuation(
0037       boost::asio::detail::addressof(context));
0038 #endif
0039 }
0040
0041 } // namespace boost_asio_handler_cont_helpers
0042
0043 #include <boost/asio/detail/pop_options.hpp>
0044
0045 #endif // BOOST_ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP