| //===----------------------------------------------------------------------===// |
| // |
| // 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___ALGORITHM_PSTL_FOR_EACH_H |
| #define _LIBCPP___ALGORITHM_PSTL_FOR_EACH_H |
| |
| #include <__algorithm/for_each.h> |
| #include <__algorithm/for_each_n.h> |
| #include <__config> |
| #include <__iterator/iterator_traits.h> |
| #include <__pstl/internal/parallel_backend.h> |
| #include <__pstl/internal/unseq_backend_simd.h> |
| #include <__type_traits/is_execution_policy.h> |
| #include <__type_traits/remove_cvref.h> |
| #include <__utility/terminate_on_exception.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Function, |
| enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI void |
| for_each(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Function __func) { |
| if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> && |
| __is_cpp17_random_access_iterator<_ForwardIterator>::value) { |
| std::__terminate_on_exception([&] { |
| __pstl::__par_backend::__parallel_for( |
| {}, |
| __policy, |
| __first, |
| __last, |
| [&__policy, __func](_ForwardIterator __brick_first, _ForwardIterator __brick_last) { |
| std::for_each(std::__remove_parallel_policy(__policy), __brick_first, __brick_last, __func); |
| }); |
| }); |
| } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> && |
| __is_cpp17_random_access_iterator<_ForwardIterator>::value) { |
| __pstl::__unseq_backend::__simd_walk_1(__first, __last - __first, __func); |
| } else { |
| std::for_each(__first, __last, __func); |
| } |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Size, |
| class _Function, |
| enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI void |
| for_each_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __size, _Function __func) { |
| if constexpr (__is_cpp17_random_access_iterator<_ForwardIterator>::value) { |
| std::for_each(__policy, __first, __first + __size, __func); |
| } else { |
| std::for_each_n(__first, __size, __func); |
| } |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| #endif // _LIBCPP___ALGORITHM_PSTL_FOR_EACH_H |