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 ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP 12 #define ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP 13 14 15 #include "asio/detail/config.hpp" 16 #include "asio/detail/addressof.hpp" 17 #include "asio/handler_continuation_hook.hpp" 18 19 #include "asio/detail/push_options.hpp" 20 21 // Calls to asio_handler_is_continuation must be made from a namespace that 22 // does not contain overloads of this function. This namespace is defined here 23 // for that purpose. 24 namespace asio_handler_cont_helpers { 25 26 template <typename Context> is_continuation(Context & context)27inline bool is_continuation(Context& context) 28 { 29 #if !defined(ASIO_HAS_HANDLER_HOOKS) 30 return false; 31 #else 32 using asio::asio_handler_is_continuation; 33 return asio_handler_is_continuation( 34 asio::detail::addressof(context)); 35 #endif 36 } 37 38 } // namespace asio_handler_cont_helpers 39 40 #include "asio/detail/pop_options.hpp" 41 42 #endif // ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP 43