868 lines
25 KiB
C++
868 lines
25 KiB
C++
//
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// execution/outstanding_work.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_OUTSTANDING_WORK_HPP
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#define ASIO_EXECUTION_OUTSTANDING_WORK_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/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/query.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 whether task submission is likely in the future.
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struct outstanding_work_t
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{
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/// The outstanding_work_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 top-level outstanding_work_t property cannot be required.
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static constexpr bool is_requirable = false;
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/// The top-level outstanding_work_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 outstanding_work_t polymorphic_query_result_type;
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/// A sub-property that indicates that the executor does not represent likely
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/// future submission of a function object.
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struct untracked_t
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{
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/// The outstanding_work_t::untracked_t property applies to executors,
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/// 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 outstanding_work_t::untracked_t property can be required.
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static constexpr bool is_requirable = true;
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/// The outstanding_work_t::untracked_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 outstanding_work_t polymorphic_query_result_type;
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/// Default constructor.
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constexpr untracked_t();
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/// Get the value associated with a property object.
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/**
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* @returns untracked_t();
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*/
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static constexpr outstanding_work_t value();
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};
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/// A sub-property that indicates that the executor represents likely
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/// future submission of a function object.
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struct tracked_t
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{
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/// The outstanding_work_t::untracked_t property applies to executors,
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/// 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 outstanding_work_t::tracked_t property can be required.
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static constexpr bool is_requirable = true;
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/// The outstanding_work_t::tracked_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 outstanding_work_t polymorphic_query_result_type;
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/// Default constructor.
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constexpr tracked_t();
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/// Get the value associated with a property object.
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/**
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* @returns tracked_t();
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*/
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static constexpr outstanding_work_t value();
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};
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/// A special value used for accessing the outstanding_work_t::untracked_t
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/// property.
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static constexpr untracked_t untracked;
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/// A special value used for accessing the outstanding_work_t::tracked_t
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/// property.
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static constexpr tracked_t tracked;
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/// Default constructor.
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constexpr outstanding_work_t();
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/// Construct from a sub-property value.
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constexpr outstanding_work_t(untracked_t);
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/// Construct from a sub-property value.
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constexpr outstanding_work_t(tracked_t);
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/// Compare property values for equality.
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friend constexpr bool operator==(
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const outstanding_work_t& a, const outstanding_work_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 outstanding_work_t& a, const outstanding_work_t& b) noexcept;
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};
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/// A special value used for accessing the outstanding_work_t property.
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constexpr outstanding_work_t outstanding_work;
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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 outstanding_work {
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template <int I> struct untracked_t;
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template <int I> struct tracked_t;
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} // namespace outstanding_work
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template <int I = 0>
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struct outstanding_work_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 outstanding_work_t polymorphic_query_result_type;
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typedef detail::outstanding_work::untracked_t<I> untracked_t;
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typedef detail::outstanding_work::tracked_t<I> tracked_t;
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ASIO_CONSTEXPR outstanding_work_t()
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: value_(-1)
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{
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}
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ASIO_CONSTEXPR outstanding_work_t(untracked_t)
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: value_(0)
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{
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}
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ASIO_CONSTEXPR outstanding_work_t(tracked_t)
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: value_(1)
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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, outstanding_work_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, outstanding_work_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, untracked_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, untracked_t>::is_valid
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>::type* = 0) ASIO_NOEXCEPT
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{
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return traits::static_query<T, untracked_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, tracked_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, untracked_t>::is_valid
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>::type* = 0,
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typename enable_if<
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traits::static_query<T, tracked_t>::is_valid
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>::type* = 0) ASIO_NOEXCEPT
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{
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return traits::static_query<T, tracked_t>::value();
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}
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template <typename E,
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typename T = decltype(outstanding_work_t::static_query<E>())>
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static ASIO_CONSTEXPR const T static_query_v
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= outstanding_work_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 outstanding_work_t& a, const outstanding_work_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 outstanding_work_t& a, const outstanding_work_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_outstanding_work_t
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{
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ASIO_CONSTEXPR convertible_from_outstanding_work_t(outstanding_work_t)
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{
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}
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};
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template <typename Executor>
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friend ASIO_CONSTEXPR outstanding_work_t query(
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const Executor& ex, convertible_from_outstanding_work_t,
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typename enable_if<
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can_query<const Executor&, untracked_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&,
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outstanding_work_t<>::untracked_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&, untracked_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, untracked_t());
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}
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template <typename Executor>
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friend ASIO_CONSTEXPR outstanding_work_t query(
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const Executor& ex, convertible_from_outstanding_work_t,
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typename enable_if<
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!can_query<const Executor&, untracked_t>::value
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>::type* = 0,
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typename enable_if<
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can_query<const Executor&, tracked_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&,
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outstanding_work_t<>::tracked_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&, tracked_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, tracked_t());
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}
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ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(untracked_t, untracked);
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ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(tracked_t, tracked);
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#if !defined(ASIO_HAS_CONSTEXPR)
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static const outstanding_work_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 outstanding_work_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 outstanding_work_t<I> outstanding_work_t<I>::instance;
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#endif
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template <int I>
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const typename outstanding_work_t<I>::untracked_t
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outstanding_work_t<I>::untracked;
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template <int I>
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const typename outstanding_work_t<I>::tracked_t
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outstanding_work_t<I>::tracked;
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namespace outstanding_work {
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template <int I = 0>
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struct untracked_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 = true);
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ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
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typedef outstanding_work_t<I> polymorphic_query_result_type;
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ASIO_CONSTEXPR untracked_t()
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{
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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<
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typename outstanding_work_t<I>::template proxy<T>::type, untracked_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 outstanding_work_t<I>::template static_proxy<T>::type,
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untracked_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 untracked_t 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::query_free<T, untracked_t>::is_valid
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>::type* = 0,
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typename enable_if<
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!can_query<T, tracked_t<I> >::value
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>::type* = 0) ASIO_NOEXCEPT
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{
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return untracked_t();
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}
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template <typename E, typename T = decltype(untracked_t::static_query<E>())>
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static ASIO_CONSTEXPR const T static_query_v
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= untracked_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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static ASIO_CONSTEXPR outstanding_work_t<I> value()
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{
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return untracked_t();
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}
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friend ASIO_CONSTEXPR bool operator==(
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const untracked_t&, const untracked_t&)
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{
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return true;
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}
|
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friend ASIO_CONSTEXPR bool operator!=(
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const untracked_t&, const untracked_t&)
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{
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return false;
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}
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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 untracked_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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template <int I = 0>
|
|
struct tracked_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 outstanding_work_t<I> polymorphic_query_result_type;
|
|
|
|
ASIO_CONSTEXPR tracked_t()
|
|
{
|
|
}
|
|
|
|
template <typename T>
|
|
struct query_member :
|
|
traits::query_member<
|
|
typename outstanding_work_t<I>::template proxy<T>::type, tracked_t> {};
|
|
|
|
template <typename T>
|
|
struct query_static_constexpr_member :
|
|
traits::query_static_constexpr_member<
|
|
typename outstanding_work_t<I>::template static_proxy<T>::type,
|
|
tracked_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(tracked_t::static_query<E>())>
|
|
static ASIO_CONSTEXPR const T static_query_v
|
|
= tracked_t::static_query<E>();
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
static ASIO_CONSTEXPR outstanding_work_t<I> value()
|
|
{
|
|
return tracked_t();
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator==(
|
|
const tracked_t&, const tracked_t&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
|
const tracked_t&, const tracked_t&)
|
|
{
|
|
return false;
|
|
}
|
|
};
|
|
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
template <int I> template <typename E, typename T>
|
|
const T tracked_t<I>::static_query_v;
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
|
|
|
} // namespace outstanding_work
|
|
} // namespace detail
|
|
|
|
typedef detail::outstanding_work_t<> outstanding_work_t;
|
|
|
|
#if defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
|
|
constexpr outstanding_work_t outstanding_work;
|
|
#else // defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
|
|
namespace { static const outstanding_work_t&
|
|
outstanding_work = outstanding_work_t::instance; }
|
|
#endif
|
|
|
|
} // namespace execution
|
|
|
|
#if !defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
|
|
|
template <typename T>
|
|
struct is_applicable_property<T, execution::outstanding_work_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::outstanding_work_t::untracked_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::outstanding_work_t::tracked_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::outstanding_work_t,
|
|
typename enable_if<
|
|
can_query<T, execution::outstanding_work_t::untracked_t>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_query<T, execution::outstanding_work_t::untracked_t>::value));
|
|
|
|
typedef execution::outstanding_work_t result_type;
|
|
};
|
|
|
|
template <typename T>
|
|
struct query_free_default<T, execution::outstanding_work_t,
|
|
typename enable_if<
|
|
!can_query<T, execution::outstanding_work_t::untracked_t>::value
|
|
&& can_query<T, execution::outstanding_work_t::tracked_t>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
|
(is_nothrow_query<T, execution::outstanding_work_t::tracked_t>::value));
|
|
|
|
typedef execution::outstanding_work_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::outstanding_work_t,
|
|
typename enable_if<
|
|
execution::detail::outstanding_work_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::outstanding_work_t<0>::
|
|
query_static_constexpr_member<T>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return execution::detail::outstanding_work_t<0>::
|
|
query_static_constexpr_member<T>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::outstanding_work_t,
|
|
typename enable_if<
|
|
!execution::detail::outstanding_work_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
&& !execution::detail::outstanding_work_t<0>::
|
|
query_member<T>::is_valid
|
|
&& traits::static_query<T,
|
|
execution::outstanding_work_t::untracked_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::outstanding_work_t::untracked_t>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return traits::static_query<T,
|
|
execution::outstanding_work_t::untracked_t>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::outstanding_work_t,
|
|
typename enable_if<
|
|
!execution::detail::outstanding_work_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
&& !execution::detail::outstanding_work_t<0>::
|
|
query_member<T>::is_valid
|
|
&& !traits::static_query<T,
|
|
execution::outstanding_work_t::untracked_t>::is_valid
|
|
&& traits::static_query<T,
|
|
execution::outstanding_work_t::tracked_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::outstanding_work_t::tracked_t>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return traits::static_query<T,
|
|
execution::outstanding_work_t::tracked_t>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::outstanding_work_t::untracked_t,
|
|
typename enable_if<
|
|
execution::detail::outstanding_work::untracked_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::outstanding_work::untracked_t<0>::
|
|
query_static_constexpr_member<T>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return execution::detail::outstanding_work::untracked_t<0>::
|
|
query_static_constexpr_member<T>::value();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::outstanding_work_t::untracked_t,
|
|
typename enable_if<
|
|
!execution::detail::outstanding_work::untracked_t<0>::
|
|
query_static_constexpr_member<T>::is_valid
|
|
&& !execution::detail::outstanding_work::untracked_t<0>::
|
|
query_member<T>::is_valid
|
|
&& !traits::query_free<T,
|
|
execution::outstanding_work_t::untracked_t>::is_valid
|
|
&& !can_query<T, execution::outstanding_work_t::tracked_t>::value
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
|
|
|
typedef execution::outstanding_work_t::untracked_t result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return result_type();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_query<T, execution::outstanding_work_t::tracked_t,
|
|
typename enable_if<
|
|
execution::detail::outstanding_work::tracked_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::outstanding_work::tracked_t<0>::
|
|
query_static_constexpr_member<T>::result_type result_type;
|
|
|
|
static ASIO_CONSTEXPR result_type value()
|
|
{
|
|
return execution::detail::outstanding_work::tracked_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::outstanding_work_t::untracked_t,
|
|
typename enable_if<
|
|
static_query<T, execution::outstanding_work_t::untracked_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid =
|
|
(is_same<typename static_query<T,
|
|
execution::outstanding_work_t::untracked_t>::result_type,
|
|
execution::outstanding_work_t::untracked_t>::value));
|
|
};
|
|
|
|
template <typename T>
|
|
struct static_require<T, execution::outstanding_work_t::tracked_t,
|
|
typename enable_if<
|
|
static_query<T, execution::outstanding_work_t::tracked_t>::is_valid
|
|
>::type>
|
|
{
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid =
|
|
(is_same<typename static_query<T,
|
|
execution::outstanding_work_t::tracked_t>::result_type,
|
|
execution::outstanding_work_t::tracked_t>::value));
|
|
};
|
|
|
|
#endif // !defined(ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)
|
|
|
|
} // namespace traits
|
|
|
|
#endif // defined(GENERATING_DOCUMENTATION)
|
|
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // ASIO_EXECUTION_OUTSTANDING_WORK_HPP
|