50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
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//
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// Copyright (c) 2019-2024 Ruben Perez Hidalgo (rubenperez038 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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#ifndef BOOST_MYSQL_DETAIL_ANY_RESUMABLE_REF_HPP
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#define BOOST_MYSQL_DETAIL_ANY_RESUMABLE_REF_HPP
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#include <boost/mysql/detail/next_action.hpp>
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#include <cstddef>
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#include <type_traits>
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namespace boost {
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namespace mysql {
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namespace detail {
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class any_resumable_ref
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{
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template <class T>
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static next_action do_resume(void* self, error_code ec, std::size_t bytes_transferred)
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{
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return static_cast<T*>(self)->resume(ec, bytes_transferred);
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}
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using fn_t = next_action (*)(void*, error_code, std::size_t);
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void* algo_{};
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fn_t fn_{};
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public:
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template <class T, class = typename std::enable_if<!std::is_same<T, any_resumable_ref>::value>::type>
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explicit any_resumable_ref(T& op) noexcept : algo_(&op), fn_(&do_resume<T>)
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{
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}
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next_action resume(error_code ec, std::size_t bytes_transferred)
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{
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return fn_(algo_, ec, bytes_transferred);
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}
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};
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} // namespace detail
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} // namespace mysql
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} // namespace boost
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#endif
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