1 // 2 // detail/handler_cont_helpers.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 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_HANDLER_CONT_HELPERS_HPP 12 #define BOOST_ASIO_DETAIL_HANDLER_CONT_HELPERS_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 #include <boost/asio/detail/addressof.hpp> 20 #include <boost/asio/handler_continuation_hook.hpp> 21 22 #include <boost/asio/detail/push_options.hpp> 23 24 // Calls to asio_handler_is_continuation must be made from a namespace that 25 // does not contain overloads of this function. This namespace is defined here 26 // for that purpose. 27 namespace boost_asio_handler_cont_helpers { 28 29 template <typename Context> is_continuation(Context & context)30inline bool is_continuation(Context& context) 31 { 32 #if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS) 33 return false; 34 #else 35 using boost::asio::asio_handler_is_continuation; 36 return asio_handler_is_continuation( 37 boost::asio::detail::addressof(context)); 38 #endif 39 } 40 41 } // namespace boost_asio_handler_cont_helpers 42 43 #include <boost/asio/detail/pop_options.hpp> 44 45 #endif // BOOST_ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP 46