1552 lines
43 KiB
C++
1552 lines
43 KiB
C++
//
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// execution/blocking.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_EXECUTION_BLOCKING_HPP
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#define ASIO_EXECUTION_BLOCKING_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/type_traits.hpp"
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#include "asio/execution/execute.hpp"
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#include "asio/execution/executor.hpp"
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#include "asio/execution/scheduler.hpp"
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#include "asio/execution/sender.hpp"
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#include "asio/is_applicable_property.hpp"
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#include "asio/prefer.hpp"
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#include "asio/query.hpp"
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#include "asio/require.hpp"
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#include "asio/traits/query_free.hpp"
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#include "asio/traits/query_member.hpp"
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#include "asio/traits/query_static_constexpr_member.hpp"
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#include "asio/traits/static_query.hpp"
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#include "asio/traits/static_require.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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#if defined(GENERATING_DOCUMENTATION)
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namespace execution {
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/// A property to describe what guarantees an executor makes about the blocking
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/// behaviour of their execution functions.
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struct blocking_t
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{
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/// The blocking_t property applies to executors, senders, and schedulers.
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template <typename T>
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static constexpr bool is_applicable_property_v =
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is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
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/// The top-level blocking_t property cannot be required.
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static constexpr bool is_requirable = false;
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/// The top-level blocking_t property cannot be preferred.
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static constexpr bool is_preferable = false;
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/// The type returned by queries against an @c any_executor.
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typedef blocking_t polymorphic_query_result_type;
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/// A sub-property that indicates that invocation of an executor's execution
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/// function may block pending completion of one or more invocations of the
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/// submitted function object.
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struct possibly_t
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{
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/// The blocking_t::possibly_t property applies to executors, senders, and
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/// schedulers.
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template <typename T>
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static constexpr bool is_applicable_property_v =
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is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
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/// The blocking_t::possibly_t property can be required.
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static constexpr bool is_requirable = true;
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/// The blocking_t::possibly_t property can be preferred.
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static constexpr bool is_preferable = true;
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/// The type returned by queries against an @c any_executor.
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typedef blocking_t polymorphic_query_result_type;
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/// Default constructor.
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constexpr possibly_t();
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/// Get the value associated with a property object.
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/**
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* @returns possibly_t();
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*/
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static constexpr blocking_t value();
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};
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/// A sub-property that indicates that invocation of an executor's execution
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/// function shall block until completion of all invocations of the submitted
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/// function object.
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struct always_t
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{
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/// The blocking_t::always_t property applies to executors, senders, and
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/// schedulers.
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template <typename T>
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static constexpr bool is_applicable_property_v =
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is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
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/// The blocking_t::always_t property can be required.
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static constexpr bool is_requirable = true;
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/// The blocking_t::always_t property can be preferred.
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static constexpr bool is_preferable = false;
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/// The type returned by queries against an @c any_executor.
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typedef blocking_t polymorphic_query_result_type;
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/// Default constructor.
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constexpr always_t();
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/// Get the value associated with a property object.
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/**
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* @returns always_t();
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*/
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static constexpr blocking_t value();
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};
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/// A sub-property that indicates that invocation of an executor's execution
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/// function shall not block pending completion of the invocations of the
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/// submitted function object.
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struct never_t
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{
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/// The blocking_t::never_t property applies to executors, senders, and
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/// schedulers.
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template <typename T>
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static constexpr bool is_applicable_property_v =
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is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
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/// The blocking_t::never_t property can be required.
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static constexpr bool is_requirable = true;
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/// The blocking_t::never_t property can be preferred.
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static constexpr bool is_preferable = true;
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/// The type returned by queries against an @c any_executor.
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typedef blocking_t polymorphic_query_result_type;
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/// Default constructor.
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constexpr never_t();
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/// Get the value associated with a property object.
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/**
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* @returns never_t();
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*/
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static constexpr blocking_t value();
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};
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/// A special value used for accessing the blocking_t::possibly_t property.
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static constexpr possibly_t possibly;
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/// A special value used for accessing the blocking_t::always_t property.
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static constexpr always_t always;
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/// A special value used for accessing the blocking_t::never_t property.
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static constexpr never_t never;
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/// Default constructor.
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constexpr blocking_t();
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/// Construct from a sub-property value.
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constexpr blocking_t(possibly_t);
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/// Construct from a sub-property value.
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constexpr blocking_t(always_t);
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/// Construct from a sub-property value.
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constexpr blocking_t(never_t);
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/// Compare property values for equality.
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friend constexpr bool operator==(
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const blocking_t& a, const blocking_t& b) noexcept;
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/// Compare property values for inequality.
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friend constexpr bool operator!=(
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const blocking_t& a, const blocking_t& b) noexcept;
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};
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/// A special value used for accessing the blocking_t property.
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constexpr blocking_t blocking;
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} // namespace execution
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#else // defined(GENERATING_DOCUMENTATION)
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namespace execution {
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namespace detail {
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namespace blocking {
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template <int I> struct possibly_t;
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template <int I> struct always_t;
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template <int I> struct never_t;
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} // namespace blocking
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namespace blocking_adaptation {
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template <int I> struct allowed_t;
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template <typename Executor, typename Function>
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void blocking_execute(
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ASIO_MOVE_ARG(Executor) ex,
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ASIO_MOVE_ARG(Function) func);
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} // namespace blocking_adaptation
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template <int I = 0>
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struct blocking_t
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{
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#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
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template <typename T>
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ASIO_STATIC_CONSTEXPR(bool,
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is_applicable_property_v = (
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is_executor<T>::value
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|| conditional<
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is_executor<T>::value,
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false_type,
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is_sender<T>
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>::type::value
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|| conditional<
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is_executor<T>::value,
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false_type,
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is_scheduler<T>
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>::type::value));
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#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
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ASIO_STATIC_CONSTEXPR(bool, is_requirable = false);
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ASIO_STATIC_CONSTEXPR(bool, is_preferable = false);
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typedef blocking_t polymorphic_query_result_type;
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typedef detail::blocking::possibly_t<I> possibly_t;
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typedef detail::blocking::always_t<I> always_t;
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typedef detail::blocking::never_t<I> never_t;
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ASIO_CONSTEXPR blocking_t()
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: value_(-1)
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{
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}
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ASIO_CONSTEXPR blocking_t(possibly_t)
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: value_(0)
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{
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}
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ASIO_CONSTEXPR blocking_t(always_t)
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: value_(1)
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{
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}
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ASIO_CONSTEXPR blocking_t(never_t)
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: value_(2)
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{
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}
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template <typename T>
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struct proxy
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{
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#if defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
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struct type
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{
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template <typename P>
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auto query(ASIO_MOVE_ARG(P) p) const
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noexcept(
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noexcept(
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declval<typename conditional<true, T, P>::type>().query(
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ASIO_MOVE_CAST(P)(p))
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)
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)
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-> decltype(
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declval<typename conditional<true, T, P>::type>().query(
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ASIO_MOVE_CAST(P)(p))
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);
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};
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#else // defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
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typedef T type;
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#endif // defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
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};
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template <typename T>
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struct static_proxy
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{
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#if defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
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struct type
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{
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template <typename P>
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static constexpr auto query(ASIO_MOVE_ARG(P) p)
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noexcept(
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noexcept(
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conditional<true, T, P>::type::query(ASIO_MOVE_CAST(P)(p))
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)
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)
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-> decltype(
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conditional<true, T, P>::type::query(ASIO_MOVE_CAST(P)(p))
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)
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{
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return T::query(ASIO_MOVE_CAST(P)(p));
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}
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};
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#else // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
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typedef T type;
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#endif // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
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};
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template <typename T>
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struct query_member :
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traits::query_member<typename proxy<T>::type, blocking_t> {};
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template <typename T>
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struct query_static_constexpr_member :
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traits::query_static_constexpr_member<
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typename static_proxy<T>::type, blocking_t> {};
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#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
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&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
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template <typename T>
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static ASIO_CONSTEXPR
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typename query_static_constexpr_member<T>::result_type
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static_query()
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ASIO_NOEXCEPT_IF((
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query_static_constexpr_member<T>::is_noexcept))
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{
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return query_static_constexpr_member<T>::value();
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}
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template <typename T>
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static ASIO_CONSTEXPR
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typename traits::static_query<T, possibly_t>::result_type
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static_query(
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typename enable_if<
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!query_static_constexpr_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!query_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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traits::static_query<T, possibly_t>::is_valid
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>::type* = 0) ASIO_NOEXCEPT
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{
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return traits::static_query<T, possibly_t>::value();
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}
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template <typename T>
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static ASIO_CONSTEXPR
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typename traits::static_query<T, always_t>::result_type
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static_query(
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typename enable_if<
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!query_static_constexpr_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!query_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!traits::static_query<T, possibly_t>::is_valid
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>::type* = 0,
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typename enable_if<
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traits::static_query<T, always_t>::is_valid
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>::type* = 0) ASIO_NOEXCEPT
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{
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return traits::static_query<T, always_t>::value();
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}
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template <typename T>
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static ASIO_CONSTEXPR
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typename traits::static_query<T, never_t>::result_type
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static_query(
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typename enable_if<
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!query_static_constexpr_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!query_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!traits::static_query<T, possibly_t>::is_valid
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>::type* = 0,
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typename enable_if<
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!traits::static_query<T, always_t>::is_valid
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>::type* = 0,
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typename enable_if<
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traits::static_query<T, never_t>::is_valid
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>::type* = 0) ASIO_NOEXCEPT
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{
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return traits::static_query<T, never_t>::value();
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}
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template <typename E, typename T = decltype(blocking_t::static_query<E>())>
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static ASIO_CONSTEXPR const T static_query_v
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= blocking_t::static_query<E>();
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#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
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// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
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friend ASIO_CONSTEXPR bool operator==(
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const blocking_t& a, const blocking_t& b)
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{
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return a.value_ == b.value_;
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}
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friend ASIO_CONSTEXPR bool operator!=(
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const blocking_t& a, const blocking_t& b)
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{
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return a.value_ != b.value_;
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}
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struct convertible_from_blocking_t
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{
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ASIO_CONSTEXPR convertible_from_blocking_t(blocking_t) {}
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};
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template <typename Executor>
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friend ASIO_CONSTEXPR blocking_t query(
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const Executor& ex, convertible_from_blocking_t,
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typename enable_if<
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can_query<const Executor&, possibly_t>::value
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>::type* = 0)
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#if !defined(__clang__) // Clang crashes if noexcept is used here.
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#if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified.
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, blocking_t<>::possibly_t>::value))
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#else // defined(ASIO_MSVC)
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, possibly_t>::value))
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#endif // defined(ASIO_MSVC)
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#endif // !defined(__clang__)
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{
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return asio::query(ex, possibly_t());
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}
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template <typename Executor>
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friend ASIO_CONSTEXPR blocking_t query(
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const Executor& ex, convertible_from_blocking_t,
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typename enable_if<
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!can_query<const Executor&, possibly_t>::value
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>::type* = 0,
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typename enable_if<
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can_query<const Executor&, always_t>::value
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>::type* = 0)
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#if !defined(__clang__) // Clang crashes if noexcept is used here.
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#if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified.
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, blocking_t<>::always_t>::value))
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#else // defined(ASIO_MSVC)
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, always_t>::value))
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#endif // defined(ASIO_MSVC)
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#endif // !defined(__clang__)
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{
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return asio::query(ex, always_t());
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}
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template <typename Executor>
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friend ASIO_CONSTEXPR blocking_t query(
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const Executor& ex, convertible_from_blocking_t,
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typename enable_if<
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!can_query<const Executor&, possibly_t>::value
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>::type* = 0,
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typename enable_if<
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!can_query<const Executor&, always_t>::value
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>::type* = 0,
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typename enable_if<
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can_query<const Executor&, never_t>::value
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>::type* = 0)
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#if !defined(__clang__) // Clang crashes if noexcept is used here.
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#if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified.
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, blocking_t<>::never_t>::value))
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#else // defined(ASIO_MSVC)
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, never_t>::value))
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#endif // defined(ASIO_MSVC)
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#endif // !defined(__clang__)
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{
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return asio::query(ex, never_t());
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}
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ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(possibly_t, possibly);
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ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(always_t, always);
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ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(never_t, never);
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#if !defined(ASIO_HAS_CONSTEXPR)
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static const blocking_t instance;
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#endif // !defined(ASIO_HAS_CONSTEXPR)
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private:
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int value_;
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};
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#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
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&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
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template <int I> template <typename E, typename T>
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const T blocking_t<I>::static_query_v;
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#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
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// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
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#if !defined(ASIO_HAS_CONSTEXPR)
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template <int I>
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const blocking_t<I> blocking_t<I>::instance;
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#endif
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template <int I>
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const typename blocking_t<I>::possibly_t blocking_t<I>::possibly;
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template <int I>
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const typename blocking_t<I>::always_t blocking_t<I>::always;
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template <int I>
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const typename blocking_t<I>::never_t blocking_t<I>::never;
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namespace blocking {
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template <int I = 0>
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struct possibly_t
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{
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#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
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template <typename T>
|
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ASIO_STATIC_CONSTEXPR(bool,
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is_applicable_property_v = (
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is_executor<T>::value
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|| conditional<
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is_executor<T>::value,
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false_type,
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|
is_sender<T>
|
|
>::type::value
|
|
|| conditional<
|
|
is_executor<T>::value,
|
|
false_type,
|
|
is_scheduler<T>
|
|
>::type::value));
|
|
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
|
|
ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
|
|
typedef blocking_t<I> polymorphic_query_result_type;
|
|
|
|
ASIO_CONSTEXPR possibly_t()
|
|
{
|
|
}
|
|
|
|
template <typename T>
|
|
struct query_member :
|
|
traits::query_member<
|
|
typename blocking_t<I>::template proxy<T>::type, possibly_t> {};
|
|
|
|
template <typename T>
|
|
struct query_static_constexpr_member :
|
|
traits::query_static_constexpr_member<
|
|
typename blocking_t<I>::template static_proxy<T>::type, possibly_t> {};
|
|
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
template <typename T>
|
|
static ASIO_CONSTEXPR
|
|
typename query_static_constexpr_member<T>::result_type
|
|
static_query()
|
|
ASIO_NOEXCEPT_IF((
|
|
query_static_constexpr_member<T>::is_noexcept))
|
|
{
|
|
return query_static_constexpr_member<T>::value();
|
|
}
|
|
|
|
template <typename T>
|
|
static ASIO_CONSTEXPR possibly_t static_query(
|
|
typename enable_if<
|
|
!query_static_constexpr_member<T>::is_valid
|
|
>::type* = 0,
|
|
typename enable_if<
|
|
!query_member<T>::is_valid
|
|
>::type* = 0,
|
|
typename enable_if<
|
|
!traits::query_free<T, possibly_t>::is_valid
|
|
>::type* = 0,
|
|
typename enable_if<
|
|
!can_query<T, always_t<I> >::value
|
|
>::type* = 0,
|
|
typename enable_if<
|
|
!can_query<T, never_t<I> >::value
|
|
>::type* = 0) ASIO_NOEXCEPT
|
|
{
|
|
return possibly_t();
|
|
}
|
|
|
|
template <typename E, typename T = decltype(possibly_t::static_query<E>())>
|
|
static ASIO_CONSTEXPR const T static_query_v
|
|
= possibly_t::static_query<E>();
|
|
#endif // defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
static ASIO_CONSTEXPR blocking_t<I> value()
|
|
{
|
|
return possibly_t();
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const possibly_t&, const possibly_t&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const possibly_t&, const possibly_t&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const possibly_t&, const always_t<I>&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const possibly_t&, const always_t<I>&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const possibly_t&, const never_t<I>&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const possibly_t&, const never_t<I>&)
|
|
{
|
|
return true;
|
|
}
|
|
};
|
|
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
template <int I> template <typename E, typename T>
|
|
const T possibly_t<I>::static_query_v;
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
template <typename Executor>
|
|
class adapter
|
|
{
|
|
public:
|
|
adapter(int, const Executor& e) ASIO_NOEXCEPT
|
|
: executor_(e)
|
|
{
|
|
}
|
|
|
|
adapter(const adapter& other) ASIO_NOEXCEPT
|
|
: executor_(other.executor_)
|
|
{
|
|
}
|
|
|
|
#if defined(ASIO_HAS_MOVE)
|
|
adapter(adapter&& other) ASIO_NOEXCEPT
|
|
: executor_(ASIO_MOVE_CAST(Executor)(other.executor_))
|
|
{
|
|
}
|
|
#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
|
|
|
|
template <int I>
|
|
static ASIO_CONSTEXPR always_t<I> query(
|
|
blocking_t<I>) ASIO_NOEXCEPT
|
|
{
|
|
return always_t<I>();
|
|
}
|
|
|
|
template <int I>
|
|
static ASIO_CONSTEXPR always_t<I> query(
|
|
possibly_t<I>) ASIO_NOEXCEPT
|
|
{
|
|
return always_t<I>();
|
|
}
|
|
|
|
template <int I>
|
|
static ASIO_CONSTEXPR always_t<I> query(
|
|
always_t<I>) ASIO_NOEXCEPT
|
|
{
|
|
return always_t<I>();
|
|
}
|
|
|
|
template <int I>
|
|
static ASIO_CONSTEXPR always_t<I> query(
|
|
never_t<I>) ASIO_NOEXCEPT
|
|
{
|
|
return always_t<I>();
|
|
}
|
|
|
|
template <typename Property>
|
|
typename enable_if<
|
|
can_query<const Executor&, Property>::value,
|
|
typename query_result<const Executor&, Property>::type
|
|
>::type query(const Property& p) const
|
|
ASIO_NOEXCEPT_IF((
|
|
is_nothrow_query<const Executor&, Property>::value))
|
|
{
|
|
return asio::query(executor_, p);
|
|
}
|
|
|
|
template <int I>
|
|
typename enable_if<
|
|
can_require<const Executor&, possibly_t<I> >::value,
|
|
typename require_result<const Executor&, possibly_t<I> >::type
|
|
>::type require(possibly_t<I>) const ASIO_NOEXCEPT
|
|
{
|
|
return asio::require(executor_, possibly_t<I>());
|
|
}
|
|
|
|
template <int I>
|
|
typename enable_if<
|
|
can_require<const Executor&, never_t<I> >::value,
|
|
typename require_result<const Executor&, never_t<I> >::type
|
|
>::type require(never_t<I>) const ASIO_NOEXCEPT
|
|
{
|
|
return asio::require(executor_, never_t<I>());
|
|
}
|
|
|
|
template <typename Property>
|
|
typename enable_if<
|
|
can_require<const Executor&, Property>::value,
|
|
adapter<typename decay<
|
|
typename require_result<const Executor&, Property>::type
|
|
>::type>
|
|
>::type require(const Property& p) const
|
|
ASIO_NOEXCEPT_IF((
|
|
is_nothrow_require<const Executor&, Property>::value))
|
|
{
|
|
return adapter<typename decay<
|
|
typename require_result<const Executor&, Property>::type
|
|
>::type>(0, asio::require(executor_, p));
|
|
}
|
|
|
|
template <typename Property>
|
|
typename enable_if<
|
|
can_prefer<const Executor&, Property>::value,
|
|
adapter<typename decay<
|
|
typename prefer_result<const Executor&, Property>::type
|
|
>::type>
|
|
>::type prefer(const Property& p) const
|
|
ASIO_NOEXCEPT_IF((
|
|
is_nothrow_prefer<const Executor&, Property>::value))
|
|
{
|
|
return adapter<typename decay<
|
|
typename prefer_result<const Executor&, Property>::type
|
|
>::type>(0, asio::prefer(executor_, p));
|
|
}
|
|
|
|
template <typename Function>
|
|
typename enable_if<
|
|
execution::can_execute<const Executor&, Function>::value
|
|
>::type execute(ASIO_MOVE_ARG(Function) f) const
|
|
{
|
|
blocking_adaptation::blocking_execute(
|
|
executor_, ASIO_MOVE_CAST(Function)(f));
|
|
}
|
|
|
|
friend bool operator==(const adapter& a, const adapter& b) ASIO_NOEXCEPT
|
|
{
|
|
return a.executor_ == b.executor_;
|
|
}
|
|
|
|
friend bool operator!=(const adapter& a, const adapter& b) ASIO_NOEXCEPT
|
|
{
|
|
return a.executor_ != b.executor_;
|
|
}
|
|
|
|
private:
|
|
Executor executor_;
|
|
};
|
|
|
|
template <int I = 0>
|
|
struct always_t
|
|
{
|
|
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
template <typename T>
|
|
ASIO_STATIC_CONSTEXPR(bool,
|
|
is_applicable_property_v = (
|
|
is_executor<T>::value
|
|
|| conditional<
|
|
is_executor<T>::value,
|
|
false_type,
|
|
is_sender<T>
|
|
>::type::value
|
|
|| conditional<
|
|
is_executor<T>::value,
|
|
false_type,
|
|
is_scheduler<T>
|
|
>::type::value));
|
|
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
|
|
ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_preferable = false);
|
|
typedef blocking_t<I> polymorphic_query_result_type;
|
|
|
|
ASIO_CONSTEXPR always_t()
|
|
{
|
|
}
|
|
|
|
template <typename T>
|
|
struct query_member :
|
|
traits::query_member<
|
|
typename blocking_t<I>::template proxy<T>::type, always_t> {};
|
|
|
|
template <typename T>
|
|
struct query_static_constexpr_member :
|
|
traits::query_static_constexpr_member<
|
|
typename blocking_t<I>::template static_proxy<T>::type, always_t> {};
|
|
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
template <typename T>
|
|
static ASIO_CONSTEXPR
|
|
typename query_static_constexpr_member<T>::result_type
|
|
static_query()
|
|
ASIO_NOEXCEPT_IF((
|
|
query_static_constexpr_member<T>::is_noexcept))
|
|
{
|
|
return query_static_constexpr_member<T>::value();
|
|
}
|
|
|
|
template <typename E, typename T = decltype(always_t::static_query<E>())>
|
|
static ASIO_CONSTEXPR const T static_query_v
|
|
= always_t::static_query<E>();
|
|
#endif // defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
static ASIO_CONSTEXPR blocking_t<I> value()
|
|
{
|
|
return always_t();
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const always_t&, const always_t&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const always_t&, const always_t&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const always_t&, const possibly_t<I>&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const always_t&, const possibly_t<I>&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const always_t&, const never_t<I>&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const always_t&, const never_t<I>&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
template <typename Executor>
|
|
friend adapter<Executor> require(
|
|
const Executor& e, const always_t&,
|
|
typename enable_if<
|
|
is_executor<Executor>::value
|
|
>::type* = 0,
|
|
typename enable_if<
|
|
traits::static_require<
|
|
const Executor&,
|
|
blocking_adaptation::allowed_t<0>
|
|
>::is_valid
|
|
>::type* = 0)
|
|
{
|
|
return adapter<Executor>(0, e);
|
|
}
|
|
};
|
|
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
template <int I> template <typename E, typename T>
|
|
const T always_t<I>::static_query_v;
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
template <int I>
|
|
struct never_t
|
|
{
|
|
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
template <typename T>
|
|
ASIO_STATIC_CONSTEXPR(bool,
|
|
is_applicable_property_v = (
|
|
is_executor<T>::value
|
|
|| conditional<
|
|
is_executor<T>::value,
|
|
false_type,
|
|
is_sender<T>
|
|
>::type::value
|
|
|| conditional<
|
|
is_executor<T>::value,
|
|
false_type,
|
|
is_scheduler<T>
|
|
>::type::value));
|
|
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
|
|
ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
|
|
typedef blocking_t<I> polymorphic_query_result_type;
|
|
|
|
ASIO_CONSTEXPR never_t()
|
|
{
|
|
}
|
|
|
|
template <typename T>
|
|
struct query_member :
|
|
traits::query_member<
|
|
typename blocking_t<I>::template proxy<T>::type, never_t> {};
|
|
|
|
template <typename T>
|
|
struct query_static_constexpr_member :
|
|
traits::query_static_constexpr_member<
|
|
typename blocking_t<I>::template static_proxy<T>::type, never_t> {};
|
|
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
template <typename T>
|
|
static ASIO_CONSTEXPR
|
|
typename query_static_constexpr_member<T>::result_type
|
|
static_query()
|
|
ASIO_NOEXCEPT_IF((
|
|
query_static_constexpr_member<T>::is_noexcept))
|
|
{
|
|
return query_static_constexpr_member<T>::value();
|
|
}
|
|
|
|
template <typename E, typename T = decltype(never_t::static_query<E>())>
|
|
static ASIO_CONSTEXPR const T static_query_v
|
|
= never_t::static_query<E>();
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
static ASIO_CONSTEXPR blocking_t<I> value()
|
|
{
|
|
return never_t();
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const never_t&, const never_t&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const never_t&, const never_t&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const never_t&, const possibly_t<I>&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const never_t&, const possibly_t<I>&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const never_t&, const always_t<I>&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const never_t&, const always_t<I>&)
|
|
{
|
|
return true;
|
|
}
|
|
};
|
|
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
template <int I> template <typename E, typename T>
|
|
const T never_t<I>::static_query_v;
|
|
#endif // defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
} // namespace blocking
|
|
} // namespace detail
|
|
|
|
typedef detail::blocking_t<> blocking_t;
|
|
|
|
#if defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
|
|
constexpr blocking_t blocking;
|
|
#else // defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
|
|
namespace { static const blocking_t& blocking = blocking_t::instance; }
|
|
#endif
|
|
|
|
} // namespace execution
|
|
|
|
#if !defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
|
|
template <typename T>
|
|
struct is_applicable_property<T, execution::blocking_t>
|
|
: integral_constant<bool,
|
|
execution::is_executor<T>::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_sender<T>
|
|
>::type::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_scheduler<T>
|
|
>::type::value>
|
|
{
|
|
};
|
|
|
|
template <typename T>
|
|
struct is_applicable_property<T, execution::blocking_t::possibly_t>
|
|
: integral_constant<bool,
|
|
execution::is_executor<T>::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_sender<T>
|
|
>::type::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_scheduler<T>
|
|
>::type::value>
|
|
{
|
|
};
|
|
|
|
template <typename T>
|
|
struct is_applicable_property<T, execution::blocking_t::always_t>
|
|
: integral_constant<bool,
|
|
execution::is_executor<T>::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_sender<T>
|
|
>::type::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_scheduler<T>
|
|
>::type::value>
|
|
{
|
|
};
|
|
|
|
template <typename T>
|
|
struct is_applicable_property<T, execution::blocking_t::never_t>
|
|
: integral_constant<bool,
|
|
execution::is_executor<T>::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_sender<T>
|
|
>::type::value
|
|
|| conditional<
|
|
execution::is_executor<T>::value,
|
|
false_type,
|
|
execution::is_scheduler<T>
|
|
>::type::value>
|
|
{
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
|
|
namespace traits {
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
|
|
|
|
template <typename T>
|
|
struct query_free_default<T, execution::blocking_t,
|
|
typename enable_if<
|
|
can_query<T, execution::blocking_t::possibly_t>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_query<T, execution::blocking_t::possibly_t>::value));
|
|
|
|
typedef execution::blocking_t result_type;
|
|
};
|
|
|
|
template <typename T>
|
|
struct query_free_default<T, execution::blocking_t,
|
|
typename enable_if<
|
|
!can_query<T, execution::blocking_t::possibly_t>::value
|
|
&& can_query<T, execution::blocking_t::always_t>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_query<T, execution::blocking_t::always_t>::value));
|
|
|
|
typedef execution::blocking_t result_type;
|
|
};
|
|
|
|
template <typename T>
|
|
struct query_free_default<T, execution::blocking_t,
|
|
typename enable_if<
|
|
!can_query<T, execution::blocking_t::possibly_t>::value
|
|
&& !can_query<T, execution::blocking_t::always_t>::value
|
|
&& can_query<T, execution::blocking_t::never_t>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_query<T, execution::blocking_t::never_t>::value));
|
|
|
|
typedef execution::blocking_t result_type;
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
|| !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t,
|
|
typename enable_if<
|
|
execution::detail::blocking_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef typename execution::detail::blocking_t<0>::
|
|
query_static_constexpr_member<T>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return execution::blocking_t::query_static_constexpr_member<T>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t,
|
|
typename enable_if<
|
|
!execution::detail::blocking_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
&& !execution::detail::blocking_t<0>::
|
|
query_member<T>::is_valid
|
|
&& traits::static_query<T, execution::blocking_t::possibly_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef typename traits::static_query<T,
|
|
execution::blocking_t::possibly_t>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return traits::static_query<T, execution::blocking_t::possibly_t>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t,
|
|
typename enable_if<
|
|
!execution::detail::blocking_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
&& !execution::detail::blocking_t<0>::
|
|
query_member<T>::is_valid
|
|
&& !traits::static_query<T, execution::blocking_t::possibly_t>::is_valid
|
|
&& traits::static_query<T, execution::blocking_t::always_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef typename traits::static_query<T,
|
|
execution::blocking_t::always_t>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return traits::static_query<T, execution::blocking_t::always_t>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t,
|
|
typename enable_if<
|
|
!execution::detail::blocking_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
&& !execution::detail::blocking_t<0>::
|
|
query_member<T>::is_valid
|
|
&& !traits::static_query<T, execution::blocking_t::possibly_t>::is_valid
|
|
&& !traits::static_query<T, execution::blocking_t::always_t>::is_valid
|
|
&& traits::static_query<T, execution::blocking_t::never_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef typename traits::static_query<T,
|
|
execution::blocking_t::never_t>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return traits::static_query<T, execution::blocking_t::never_t>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t::possibly_t,
|
|
typename enable_if<
|
|
execution::detail::blocking::possibly_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef typename execution::detail::blocking::possibly_t<0>::
|
|
query_static_constexpr_member<T>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return execution::detail::blocking::possibly_t<0>::
|
|
query_static_constexpr_member<T>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t::possibly_t,
|
|
typename enable_if<
|
|
!execution::detail::blocking::possibly_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
&& !execution::detail::blocking::possibly_t<0>::
|
|
query_member<T>::is_valid
|
|
&& !traits::query_free<T, execution::blocking_t::possibly_t>::is_valid
|
|
&& !can_query<T, execution::blocking_t::always_t>::value
|
|
&& !can_query<T, execution::blocking_t::never_t>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef execution::blocking_t::possibly_t result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return result_type();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t::always_t,
|
|
typename enable_if<
|
|
execution::detail::blocking::always_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef typename execution::detail::blocking::always_t<0>::
|
|
query_static_constexpr_member<T>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return execution::detail::blocking::always_t<0>::
|
|
query_static_constexpr_member<T>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::blocking_t::never_t,
|
|
typename enable_if<
|
|
execution::detail::blocking::never_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef typename execution::detail::blocking::never_t<0>::
|
|
query_static_constexpr_member<T>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return execution::detail::blocking::never_t<0>::
|
|
query_static_constexpr_member<T>::value();
|
|
}
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
|
// || !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)
|
|
|
|
template <typename T>
|
|
struct static_require<T, execution::blocking_t::possibly_t,
|
|
typename enable_if<
|
|
static_query<T, execution::blocking_t::possibly_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid =
|
|
(is_same<typename static_query<T,
|
|
execution::blocking_t::possibly_t>::result_type,
|
|
execution::blocking_t::possibly_t>::value));
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_require<T, execution::blocking_t::always_t,
|
|
typename enable_if<
|
|
static_query<T, execution::blocking_t::always_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid =
|
|
(is_same<typename static_query<T,
|
|
execution::blocking_t::always_t>::result_type,
|
|
execution::blocking_t::always_t>::value));
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_require<T, execution::blocking_t::never_t,
|
|
typename enable_if<
|
|
static_query<T, execution::blocking_t::never_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid =
|
|
(is_same<typename static_query<T,
|
|
execution::blocking_t::never_t>::result_type,
|
|
execution::blocking_t::never_t>::value));
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_REQUIRE_FREE_TRAIT)
|
|
|
|
template <typename T>
|
|
struct require_free_default<T, execution::blocking_t::always_t,
|
|
typename enable_if<
|
|
is_same<T, typename decay<T>::type>::value
|
|
&& execution::is_executor<T>::value
|
|
&& traits::static_require<
|
|
const T&,
|
|
execution::detail::blocking_adaptation::allowed_t<0>
|
|
>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
|
|
typedef execution::detail::blocking::adapter<T> result_type;
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_REQUIRE_FREE_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_EQUALITY_COMPARABLE_TRAIT)
|
|
|
|
template <typename Executor>
|
|
struct equality_comparable<
|
|
execution::detail::blocking::adapter<Executor> >
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_EQUALITY_COMPARABLE_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_EXECUTE_MEMBER_TRAIT)
|
|
|
|
template <typename Executor, typename Function>
|
|
struct execute_member<
|
|
execution::detail::blocking::adapter<Executor>, Function>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
|
|
typedef void result_type;
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_EXECUTE_MEMBER_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
|
|
|
|
template <typename Executor, int I>
|
|
struct query_static_constexpr_member<
|
|
execution::detail::blocking::adapter<Executor>,
|
|
execution::detail::blocking_t<I> >
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
typedef execution::blocking_t::always_t result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value() ASIO_NOEXCEPT
|
|
{
|
|
return result_type();
|
|
}
|
|
};
|
|
|
|
template <typename Executor, int I>
|
|
struct query_static_constexpr_member<
|
|
execution::detail::blocking::adapter<Executor>,
|
|
execution::detail::blocking::always_t<I> >
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
typedef execution::blocking_t::always_t result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value() ASIO_NOEXCEPT
|
|
{
|
|
return result_type();
|
|
}
|
|
};
|
|
|
|
template <typename Executor, int I>
|
|
struct query_static_constexpr_member<
|
|
execution::detail::blocking::adapter<Executor>,
|
|
execution::detail::blocking::possibly_t<I> >
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
typedef execution::blocking_t::always_t result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value() ASIO_NOEXCEPT
|
|
{
|
|
return result_type();
|
|
}
|
|
};
|
|
|
|
template <typename Executor, int I>
|
|
struct query_static_constexpr_member<
|
|
execution::detail::blocking::adapter<Executor>,
|
|
execution::detail::blocking::never_t<I> >
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
typedef execution::blocking_t::always_t result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value() ASIO_NOEXCEPT
|
|
{
|
|
return result_type();
|
|
}
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
|
|
|
|
template <typename Executor, typename Property>
|
|
struct query_member<
|
|
execution::detail::blocking::adapter<Executor>, Property,
|
|
typename enable_if<
|
|
can_query<const Executor&, Property>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_query<Executor, Property>::value));
|
|
typedef typename query_result<Executor, Property>::type result_type;
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_REQUIRE_MEMBER_TRAIT)
|
|
|
|
template <typename Executor, int I>
|
|
struct require_member<
|
|
execution::detail::blocking::adapter<Executor>,
|
|
execution::detail::blocking::possibly_t<I>,
|
|
typename enable_if<
|
|
can_require<
|
|
const Executor&,
|
|
execution::detail::blocking::possibly_t<I>
|
|
>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_require<const Executor&,
|
|
execution::detail::blocking::possibly_t<I> >::value));
|
|
typedef typename require_result<const Executor&,
|
|
execution::detail::blocking::possibly_t<I> >::type result_type;
|
|
};
|
|
|
|
template <typename Executor, int I>
|
|
struct require_member<
|
|
execution::detail::blocking::adapter<Executor>,
|
|
execution::detail::blocking::never_t<I>,
|
|
typename enable_if<
|
|
can_require<
|
|
const Executor&,
|
|
execution::detail::blocking::never_t<I>
|
|
>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_require<const Executor&,
|
|
execution::detail::blocking::never_t<I> >::value));
|
|
typedef typename require_result<const Executor&,
|
|
execution::detail::blocking::never_t<I> >::type result_type;
|
|
};
|
|
|
|
template <typename Executor, typename Property>
|
|
struct require_member<
|
|
execution::detail::blocking::adapter<Executor>, Property,
|
|
typename enable_if<
|
|
can_require<const Executor&, Property>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_require<Executor, Property>::value));
|
|
typedef execution::detail::blocking::adapter<typename decay<
|
|
typename require_result<Executor, Property>::type
|
|
>::type> result_type;
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_REQUIRE_MEMBER_TRAIT)
|
|
|
|
#if !defined(ASIO_HAS_DEDUCED_PREFER_MEMBER_TRAIT)
|
|
|
|
template <typename Executor, typename Property>
|
|
struct prefer_member<
|
|
execution::detail::blocking::adapter<Executor>, Property,
|
|
typename enable_if<
|
|
can_prefer<const Executor&, Property>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_prefer<Executor, Property>::value));
|
|
typedef execution::detail::blocking::adapter<typename decay<
|
|
typename prefer_result<Executor, Property>::type
|
|
>::type> result_type;
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_PREFER_MEMBER_TRAIT)
|
|
|
|
} // namespace traits
|
|
|
|
#endif // defined(GENERATING_DOCUMENTATION)
|
|
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // ASIO_EXECUTION_BLOCKING_HPP
|