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Diffstat (limited to '3rdparty/asio/include/asio/execution/occupancy.hpp')
-rw-r--r-- | 3rdparty/asio/include/asio/execution/occupancy.hpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/3rdparty/asio/include/asio/execution/occupancy.hpp b/3rdparty/asio/include/asio/execution/occupancy.hpp new file mode 100644 index 00000000000..c986c88113d --- /dev/null +++ b/3rdparty/asio/include/asio/execution/occupancy.hpp @@ -0,0 +1,184 @@ +// +// execution/occupancy.hpp +// ~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2024 Christopher M. Kohlhoff (chris at kohlhoff dot com) +// +// Distributed under the Boost Software License, Version 1.0. (See accompanying +// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +// + +#ifndef ASIO_EXECUTION_OCCUPANCY_HPP +#define ASIO_EXECUTION_OCCUPANCY_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include "asio/detail/config.hpp" +#include "asio/detail/type_traits.hpp" +#include "asio/execution/executor.hpp" +#include "asio/is_applicable_property.hpp" +#include "asio/traits/query_static_constexpr_member.hpp" +#include "asio/traits/static_query.hpp" + +#include "asio/detail/push_options.hpp" + +namespace asio { + +#if defined(GENERATING_DOCUMENTATION) + +namespace execution { + +/// A property that gives an estimate of the number of execution agents that +/// should occupy the associated execution context. +struct occupancy_t +{ + /// The occupancy_t property applies to executors. + template <typename T> + static constexpr bool is_applicable_property_v = is_executor_v<T>; + + /// The occupancy_t property cannot be required. + static constexpr bool is_requirable = false; + + /// The occupancy_t property cannot be preferred. + static constexpr bool is_preferable = false; + + /// The type returned by queries against an @c any_executor. + typedef std::size_t polymorphic_query_result_type; +}; + +/// A special value used for accessing the occupancy_t property. +constexpr occupancy_t occupancy; + +} // namespace execution + +#else // defined(GENERATING_DOCUMENTATION) + +namespace execution { +namespace detail { + +template <int I = 0> +struct occupancy_t +{ +#if defined(ASIO_HAS_VARIABLE_TEMPLATES) + template <typename T> + static constexpr bool is_applicable_property_v = is_executor<T>::value; +#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES) + + static constexpr bool is_requirable = false; + static constexpr bool is_preferable = false; + typedef std::size_t polymorphic_query_result_type; + + constexpr occupancy_t() + { + } + + template <typename T> + struct static_proxy + { +#if defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) + struct type + { + template <typename P> + static constexpr auto query(P&& p) + noexcept( + noexcept( + conditional_t<true, T, P>::query(static_cast<P&&>(p)) + ) + ) + -> decltype( + conditional_t<true, T, P>::query(static_cast<P&&>(p)) + ) + { + return T::query(static_cast<P&&>(p)); + } + }; +#else // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) + typedef T type; +#endif // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) + }; + + template <typename T> + struct query_static_constexpr_member : + traits::query_static_constexpr_member< + typename static_proxy<T>::type, occupancy_t> {}; + +#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ + && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) + template <typename T> + static constexpr typename query_static_constexpr_member<T>::result_type + static_query() + noexcept(query_static_constexpr_member<T>::is_noexcept) + { + return query_static_constexpr_member<T>::value(); + } + + template <typename E, typename T = decltype(occupancy_t::static_query<E>())> + static constexpr const T static_query_v = occupancy_t::static_query<E>(); +#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) + // && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) +}; + +#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ + && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) +template <int I> template <typename E, typename T> +const T occupancy_t<I>::static_query_v; +#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) + // && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) + +} // namespace detail + +typedef detail::occupancy_t<> occupancy_t; + +constexpr occupancy_t occupancy; + +} // namespace execution + +#if !defined(ASIO_HAS_VARIABLE_TEMPLATES) + +template <typename T> +struct is_applicable_property<T, execution::occupancy_t> + : integral_constant<bool, execution::is_executor<T>::value> +{ +}; + +#endif // !defined(ASIO_HAS_VARIABLE_TEMPLATES) + +namespace traits { + +#if !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ + || !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) + +template <typename T> +struct static_query<T, execution::occupancy_t, + enable_if_t< + execution::detail::occupancy_t<0>:: + query_static_constexpr_member<T>::is_valid + >> +{ + static constexpr bool is_valid = true; + static constexpr bool is_noexcept = true; + + typedef typename execution::detail::occupancy_t<0>:: + query_static_constexpr_member<T>::result_type result_type; + + static constexpr result_type value() + { + return execution::detail::occupancy_t<0>:: + query_static_constexpr_member<T>::value(); + } +}; + +#endif // !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) + // || !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) + +} // namespace traits + +#endif // defined(GENERATING_DOCUMENTATION) + +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_EXECUTION_OCCUPANCY_HPP |