| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___TYPE_TRAITS_IS_EXECUTION_POLICY_H |
| #define _LIBCPP___TYPE_TRAITS_IS_EXECUTION_POLICY_H |
| |
| #include <__config> |
| #include <__type_traits/remove_cvref.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class> |
| inline constexpr bool is_execution_policy_v = false; |
| |
| template <class> |
| inline constexpr bool __is_unsequenced_execution_policy_impl = false; |
| |
| template <class _Tp> |
| inline constexpr bool __is_unsequenced_execution_policy_v = |
| __is_unsequenced_execution_policy_impl<__remove_cvref_t<_Tp>>; |
| |
| template <class> |
| inline constexpr bool __is_parallel_execution_policy_impl = false; |
| |
| template <class _Tp> |
| inline constexpr bool __is_parallel_execution_policy_v = __is_parallel_execution_policy_impl<__remove_cvref_t<_Tp>>; |
| |
| namespace execution { |
| struct __disable_user_instantiations_tag { |
| explicit __disable_user_instantiations_tag() = default; |
| }; |
| } // namespace execution |
| |
| // TODO: Remove default argument once algorithms are using the new backend dispatching |
| template <class _ExecutionPolicy> |
| _LIBCPP_HIDE_FROM_ABI auto |
| __remove_parallel_policy(const _ExecutionPolicy& = _ExecutionPolicy{execution::__disable_user_instantiations_tag{}}); |
| |
| // Removes the "parallel" part of an execution policy. |
| // For example, turns par_unseq into unseq, and par into seq. |
| template <class _ExecutionPolicy> |
| using __remove_parallel_policy_t = decltype(std::__remove_parallel_policy<_ExecutionPolicy>()); |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER >= 17 |
| |
| #endif // _LIBCPP___TYPE_TRAITS_IS_EXECUTION_POLICY_H |