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- //
- // impl/defer.hpp
- // ~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 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_IMPL_DEFER_HPP
- #define ASIO_IMPL_DEFER_HPP
-
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
- #include "asio/detail/config.hpp"
- #include "asio/associated_allocator.hpp"
- #include "asio/associated_executor.hpp"
- #include "asio/detail/work_dispatcher.hpp"
-
- #include "asio/detail/push_options.hpp"
-
- namespace asio {
- namespace detail {
-
- struct initiate_defer
- {
- template <typename CompletionHandler>
- void operator()(ASIO_MOVE_ARG(CompletionHandler) handler) const
- {
- typedef typename decay<CompletionHandler>::type DecayedHandler;
-
- typename associated_executor<DecayedHandler>::type ex(
- (get_associated_executor)(handler));
-
- typename associated_allocator<DecayedHandler>::type alloc(
- (get_associated_allocator)(handler));
-
- ex.defer(ASIO_MOVE_CAST(CompletionHandler)(handler), alloc);
- }
-
- template <typename CompletionHandler, typename Executor>
- void operator()(ASIO_MOVE_ARG(CompletionHandler) handler,
- ASIO_MOVE_ARG(Executor) ex) const
- {
- typedef typename decay<CompletionHandler>::type DecayedHandler;
-
- typename associated_allocator<DecayedHandler>::type alloc(
- (get_associated_allocator)(handler));
-
- ex.defer(detail::work_dispatcher<DecayedHandler>(
- ASIO_MOVE_CAST(CompletionHandler)(handler)), alloc);
- }
- };
-
- } // namespace detail
-
- template <typename CompletionToken>
- ASIO_INITFN_RESULT_TYPE(CompletionToken, void()) defer(
- ASIO_MOVE_ARG(CompletionToken) token)
- {
- return async_initiate<CompletionToken, void()>(
- detail::initiate_defer(), token);
- }
-
- template <typename Executor, typename CompletionToken>
- ASIO_INITFN_RESULT_TYPE(CompletionToken, void()) defer(
- const Executor& ex, ASIO_MOVE_ARG(CompletionToken) token,
- typename enable_if<is_executor<Executor>::value>::type*)
- {
- return async_initiate<CompletionToken, void()>(
- detail::initiate_defer(), token, ex);
- }
-
- template <typename ExecutionContext, typename CompletionToken>
- inline ASIO_INITFN_RESULT_TYPE(CompletionToken, void()) defer(
- ExecutionContext& ctx, ASIO_MOVE_ARG(CompletionToken) token,
- typename enable_if<is_convertible<
- ExecutionContext&, execution_context&>::value>::type*)
- {
- return (defer)(ctx.get_executor(),
- ASIO_MOVE_CAST(CompletionToken)(token));
- }
-
- } // namespace asio
-
- #include "asio/detail/pop_options.hpp"
-
- #endif // ASIO_IMPL_DEFER_HPP
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