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