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- //
- // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- // Official repository: https://github.com/boostorg/beast
- //
- #ifndef BOOST_BEAST_DETAIL_GET_IO_CONTEXT_HPP
- #define BOOST_BEAST_DETAIL_GET_IO_CONTEXT_HPP
- #include <boost/beast/core/stream_traits.hpp>
- #include <boost/asio/executor.hpp>
- #include <boost/asio/io_context.hpp>
- #include <boost/asio/strand.hpp>
- #include <memory>
- #include <type_traits>
- namespace boost {
- namespace beast {
- namespace detail {
- //------------------------------------------------------------------------------
- inline
- net::io_context*
- get_io_context(net::io_context& ioc)
- {
- return std::addressof(ioc);
- }
- inline
- net::io_context*
- get_io_context(net::io_context::executor_type const& ex)
- {
- return std::addressof(ex.context());
- }
- inline
- net::io_context*
- get_io_context(net::strand<
- net::io_context::executor_type> const& ex)
- {
- return std::addressof(
- ex.get_inner_executor().context());
- }
- template<class Executor>
- net::io_context*
- get_io_context(net::strand<Executor> const& ex)
- {
- return get_io_context(ex.get_inner_executor());
- }
- template<
- class T,
- class = typename std::enable_if<
- std::is_same<T, net::executor>::value>::type>
- net::io_context*
- get_io_context(T const& ex)
- {
- auto p = ex.template target<typename
- net::io_context::executor_type>();
- if(! p)
- return nullptr;
- return std::addressof(p->context());
- }
- inline
- net::io_context*
- get_io_context(...)
- {
- return nullptr;
- }
- //------------------------------------------------------------------------------
- template<class T>
- net::io_context*
- get_io_context_impl(T& t, std::true_type)
- {
- return get_io_context(
- t.get_executor());
- }
- template<class T>
- net::io_context*
- get_io_context_impl(T const&, std::false_type)
- {
- return nullptr;
- }
- // Returns the io_context*, or nullptr, for any object.
- template<class T>
- net::io_context*
- get_io_context(T& t)
- {
- return get_io_context_impl(t,
- has_get_executor<T>{});
- }
- } // detail
- } // beast
- } // boost
- #endif
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