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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/use_future.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/use_future.hpp')
-rw-r--r--lib/asio/use_future.hpp159
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diff --git a/lib/asio/use_future.hpp b/lib/asio/use_future.hpp
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-//
-// use_future.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_USE_FUTURE_HPP
-#define ASIO_USE_FUTURE_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include "asio/detail/config.hpp"
-
-#if defined(ASIO_HAS_STD_FUTURE) \
- || defined(GENERATING_DOCUMENTATION)
-
-#include <memory>
-#include "asio/detail/type_traits.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-namespace detail {
-
-template <typename Function, typename Allocator>
-class packaged_token;
-
-template <typename Function, typename Allocator, typename Result>
-class packaged_handler;
-
-} // namespace detail
-
-/// Class used to specify that an asynchronous operation should return a future.
-/**
- * The use_future_t class is used to indicate that an asynchronous operation
- * should return a std::future object. A use_future_t object may be passed as a
- * handler to an asynchronous operation, typically using the special value @c
- * asio::use_future. For example:
- *
- * @code std::future<std::size_t> my_future
- * = my_socket.async_read_some(my_buffer, asio::use_future); @endcode
- *
- * The initiating function (async_read_some in the above example) returns a
- * future that will receive the result of the operation. If the operation
- * completes with an error_code indicating failure, it is converted into a
- * system_error and passed back to the caller via the future.
- */
-template <typename Allocator = std::allocator<void> >
-class use_future_t
-{
-public:
- /// The allocator type. The allocator is used when constructing the
- /// @c std::promise object for a given asynchronous operation.
- typedef Allocator allocator_type;
-
- /// Construct using default-constructed allocator.
- ASIO_CONSTEXPR use_future_t()
- {
- }
-
- /// Construct using specified allocator.
- explicit use_future_t(const Allocator& allocator)
- : allocator_(allocator)
- {
- }
-
-#if !defined(ASIO_NO_DEPRECATED)
- /// (Deprecated: Use rebind().) Specify an alternate allocator.
- template <typename OtherAllocator>
- use_future_t<OtherAllocator> operator[](const OtherAllocator& allocator) const
- {
- return use_future_t<OtherAllocator>(allocator);
- }
-#endif // !defined(ASIO_NO_DEPRECATED)
-
- /// Specify an alternate allocator.
- template <typename OtherAllocator>
- use_future_t<OtherAllocator> rebind(const OtherAllocator& allocator) const
- {
- return use_future_t<OtherAllocator>(allocator);
- }
-
- /// Obtain allocator.
- allocator_type get_allocator() const
- {
- return allocator_;
- }
-
- /// Wrap a function object in a packaged task.
- /**
- * The @c package function is used to adapt a function object as a packaged
- * task. When this adapter is passed as a completion token to an asynchronous
- * operation, the result of the function object is retuned via a std::future.
- *
- * @par Example
- *
- * @code std::future<std::size_t> fut =
- * my_socket.async_read_some(buffer,
- * use_future([](asio::error_code ec, std::size_t n)
- * {
- * return ec ? 0 : n;
- * }));
- * ...
- * std::size_t n = fut.get(); @endcode
- */
- template <typename Function>
-#if defined(GENERATING_DOCUMENTATION)
- unspecified
-#else // defined(GENERATING_DOCUMENTATION)
- detail::packaged_token<typename decay<Function>::type, Allocator>
-#endif // defined(GENERATING_DOCUMENTATION)
- operator()(ASIO_MOVE_ARG(Function) f) const;
-
-private:
- // Helper type to ensure that use_future can be constexpr default-constructed
- // even when std::allocator<void> can't be.
- struct std_allocator_void
- {
- ASIO_CONSTEXPR std_allocator_void()
- {
- }
-
- operator std::allocator<void>() const
- {
- return std::allocator<void>();
- }
- };
-
- typename conditional<
- is_same<std::allocator<void>, Allocator>::value,
- std_allocator_void, Allocator>::type allocator_;
-};
-
-/// A special value, similar to std::nothrow.
-/**
- * See the documentation for asio::use_future_t for a usage example.
- */
-#if defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
-constexpr use_future_t<> use_future;
-#elif defined(ASIO_MSVC)
-__declspec(selectany) use_future_t<> use_future;
-#endif
-
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#include "asio/impl/use_future.hpp"
-
-#endif // defined(ASIO_HAS_STD_FUTURE)
- // || defined(GENERATING_DOCUMENTATION)
-
-#endif // ASIO_USE_FUTURE_HPP