81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
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//
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// detail/handler_invoke_helpers.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff 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 ASIO_DETAIL_HANDLER_INVOKE_HELPERS_HPP
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#define ASIO_DETAIL_HANDLER_INVOKE_HELPERS_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include "asio/detail/memory.hpp"
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#include "asio/handler_invoke_hook.hpp"
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#include "asio/detail/push_options.hpp"
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// Calls to asio_handler_invoke must be made from a namespace that does not
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// contain overloads of this function. The asio_handler_invoke_helpers
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// namespace is defined here for that purpose.
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namespace asio_handler_invoke_helpers {
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#if defined(ASIO_NO_DEPRECATED)
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template <typename Function, typename Context>
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inline void error_if_hook_is_defined(Function& function, Context& context)
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{
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using asio::asio_handler_invoke;
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// If you get an error here it is because some of your handlers still
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// overload asio_handler_invoke, but this hook is no longer used.
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(void)static_cast<asio::asio_handler_invoke_is_no_longer_used>(
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asio_handler_invoke(function, asio::detail::addressof(context)));
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}
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#endif // defined(ASIO_NO_DEPRECATED)
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template <typename Function, typename Context>
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inline void invoke(Function& function, Context& context)
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{
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#if !defined(ASIO_HAS_HANDLER_HOOKS)
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Function tmp(function);
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tmp();
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#elif defined(ASIO_NO_DEPRECATED)
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// The asio_handler_invoke hook is no longer used to invoke the function.
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(void)&error_if_hook_is_defined<Function, Context>;
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(void)context;
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function();
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#else
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using asio::asio_handler_invoke;
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asio_handler_invoke(function, asio::detail::addressof(context));
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#endif
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}
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template <typename Function, typename Context>
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inline void invoke(const Function& function, Context& context)
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{
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#if !defined(ASIO_HAS_HANDLER_HOOKS)
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Function tmp(function);
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tmp();
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#elif defined(ASIO_NO_DEPRECATED)
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// The asio_handler_invoke hook is no longer used to invoke the function.
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(void)&error_if_hook_is_defined<const Function, Context>;
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(void)context;
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Function tmp(function);
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tmp();
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#else
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using asio::asio_handler_invoke;
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asio_handler_invoke(function, asio::detail::addressof(context));
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#endif
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}
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} // namespace asio_handler_invoke_helpers
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_DETAIL_HANDLER_INVOKE_HELPERS_HPP
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