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get_execution_policy.hpp
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get_execution_policy.hpp
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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* Licensed under the Apache License Version 2.0 with LLVM Exceptions
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://llvm.org/LICENSE.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <unifex/execution_policy.hpp>
#include <unifex/tag_invoke.hpp>
#include <unifex/detail/prologue.hpp>
namespace unifex {
namespace _get_execution_policy {
struct _fn {
template(typename PolicyProvider) //
(requires tag_invocable<_fn, const PolicyProvider&>) //
constexpr auto
operator()(const PolicyProvider& provider) const noexcept
-> tag_invoke_result_t<_fn, const PolicyProvider&> {
return tag_invoke(_fn{}, provider);
}
template(typename PolicyProvider) //
(requires(!tag_invocable<_fn, const PolicyProvider&>)) //
constexpr sequenced_policy
operator()([[maybe_unused]] const PolicyProvider&) const noexcept {
return {};
}
};
} // namespace _get_execution_policy
inline constexpr _get_execution_policy::_fn get_execution_policy{};
} // namespace unifex
#include <unifex/detail/epilogue.hpp>