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authorMatthias P. Braendli <matthias.braendli@mpb.li>2019-08-13 10:29:39 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2019-08-13 10:29:39 +0200
commita5c50a4f262f0a880734623f79d4dc2f1aa8a0a2 (patch)
tree1772ef47d98a68245c3d04d95637e5b9c1040904 /lib/asio/async_result.hpp
parent69aba72f0883c5effb5c3c2991d0c5257deb7409 (diff)
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Pull in files from odr-mmbtools-common
Replace ASIO by simpler implementation, meaning that the telnet RC now only supports a single connection. Move Log, RC to lib/
Diffstat (limited to 'lib/asio/async_result.hpp')
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-//
-// async_result.hpp
-// ~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff 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)
-//
-
-#ifndef ASIO_ASYNC_RESULT_HPP
-#define ASIO_ASYNC_RESULT_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include "asio/detail/config.hpp"
-#include "asio/detail/type_traits.hpp"
-#include "asio/handler_type.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-
-/// An interface for customising the behaviour of an initiating function.
-/**
- * The async_result traits class is used for determining:
- *
- * @li the concrete completion handler type to be called at the end of the
- * asynchronous operation;
- *
- * @li the initiating function return type; and
- *
- * @li how the return value of the initiating function is obtained.
- *
- * The trait allows the handler and return types to be determined at the point
- * where the specific completion handler signature is known.
- *
- * This template may be specialised for user-defined completion token types.
- * The primary template assumes that the CompletionToken is the completion
- * handler.
- */
-#if defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
-template <typename CompletionToken, typename Signature>
-#else // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
-template <typename CompletionToken, typename Signature = void>
-#endif // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
-class async_result
-{
-public:
-#if defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- /// The concrete completion handler type for the specific signature.
- typedef CompletionToken completion_handler_type;
-
- /// The return type of the initiating function.
- typedef void return_type;
-#else // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- // For backward compatibility, determine the concrete completion handler type
- // by using the legacy handler_type trait.
- typedef typename handler_type<CompletionToken, Signature>::type
- completion_handler_type;
-
- // For backward compatibility, determine the initiating function return type
- // using the legacy single-parameter version of async_result.
- typedef typename async_result<completion_handler_type>::type return_type;
-#endif // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
-
- /// Construct an async result from a given handler.
- /**
- * When using a specalised async_result, the constructor has an opportunity
- * to initialise some state associated with the completion handler, which is
- * then returned from the initiating function.
- */
- explicit async_result(completion_handler_type& h)
-#if defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- // No data members to initialise.
-#else // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- : legacy_result_(h)
-#endif // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- {
- (void)h;
- }
-
- /// Obtain the value to be returned from the initiating function.
- return_type get()
- {
-#if defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- // Nothing to do.
-#else // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- return legacy_result_.get();
-#endif // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- }
-
-private:
- async_result(const async_result&) ASIO_DELETED;
- async_result& operator=(const async_result&) ASIO_DELETED;
-
-#if defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- // No data members.
-#else // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
- async_result<completion_handler_type> legacy_result_;
-#endif // defined(ASIO_NO_DEPRECATED) || defined(GENERATING_DOCUMENTATION)
-};
-
-#if !defined(ASIO_NO_DEPRECATED)
-
-/// (Deprecated: Use two-parameter version of async_result.) An interface for
-/// customising the behaviour of an initiating function.
-/**
- * This template may be specialised for user-defined handler types.
- */
-template <typename Handler>
-class async_result<Handler>
-{
-public:
- /// The return type of the initiating function.
- typedef void type;
-
- /// Construct an async result from a given handler.
- /**
- * When using a specalised async_result, the constructor has an opportunity
- * to initialise some state associated with the handler, which is then
- * returned from the initiating function.
- */
- explicit async_result(Handler&)
- {
- }
-
- /// Obtain the value to be returned from the initiating function.
- type get()
- {
- }
-};
-
-#endif // !defined(ASIO_NO_DEPRECATED)
-
-/// Helper template to deduce the handler type from a CompletionToken, capture
-/// a local copy of the handler, and then create an async_result for the
-/// handler.
-template <typename CompletionToken, typename Signature>
-struct async_completion
-{
- /// The real handler type to be used for the asynchronous operation.
- typedef typename asio::async_result<
- typename decay<CompletionToken>::type,
- Signature>::completion_handler_type completion_handler_type;
-
-#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
- /// Constructor.
- /**
- * The constructor creates the concrete completion handler and makes the link
- * between the handler and the asynchronous result.
- */
- explicit async_completion(CompletionToken& token)
- : completion_handler(static_cast<typename conditional<
- is_same<CompletionToken, completion_handler_type>::value,
- completion_handler_type&, CompletionToken&&>::type>(token)),
- result(completion_handler)
- {
- }
-#else // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
- explicit async_completion(typename decay<CompletionToken>::type& token)
- : completion_handler(token),
- result(completion_handler)
- {
- }
-
- explicit async_completion(const typename decay<CompletionToken>::type& token)
- : completion_handler(token),
- result(completion_handler)
- {
- }
-#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
-
- /// A copy of, or reference to, a real handler object.
-#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
- typename conditional<
- is_same<CompletionToken, completion_handler_type>::value,
- completion_handler_type&, completion_handler_type>::type completion_handler;
-#else // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
- completion_handler_type completion_handler;
-#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
-
- /// The result of the asynchronous operation's initiating function.
- async_result<typename decay<CompletionToken>::type, Signature> result;
-};
-
-namespace detail {
-
-template <typename CompletionToken, typename Signature>
-struct async_result_helper
- : async_result<typename decay<CompletionToken>::type, Signature>
-{
-};
-
-} // namespace detail
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#if defined(GENERATING_DOCUMENTATION)
-# define ASIO_INITFN_RESULT_TYPE(ct, sig) \
- void_or_deduced
-#elif defined(_MSC_VER) && (_MSC_VER < 1500)
-# define ASIO_INITFN_RESULT_TYPE(ct, sig) \
- typename ::asio::detail::async_result_helper< \
- ct, sig>::return_type
-#define ASIO_HANDLER_TYPE(ct, sig) \
- typename ::asio::detail::async_result_helper< \
- ct, sig>::completion_handler_type
-#else
-# define ASIO_INITFN_RESULT_TYPE(ct, sig) \
- typename ::asio::async_result< \
- typename ::asio::decay<ct>::type, sig>::return_type
-#define ASIO_HANDLER_TYPE(ct, sig) \
- typename ::asio::async_result< \
- typename ::asio::decay<ct>::type, sig>::completion_handler_type
-#endif
-
-#endif // ASIO_ASYNC_RESULT_HPP