| //===----------------------------------------------------------------------===// |
| // |
| // 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_FIND_H |
| #define _LIBCPP___ALGORITHM_PSTL_FIND_H |
| |
| #include <__algorithm/comp.h> |
| #include <__algorithm/find.h> |
| #include <__config> |
| #include <__pstl/internal/parallel_impl.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 _Tp, |
| enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI _ForwardIterator |
| find(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { |
| if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> && |
| __is_cpp17_random_access_iterator<_ForwardIterator>::value) { |
| return std::__terminate_on_exception([&] { |
| return __pstl::__internal::__parallel_find( |
| __pstl::__internal::__par_backend_tag{}, |
| __policy, |
| __first, |
| __last, |
| [&__policy, &__value](_ForwardIterator __brick_first, _ForwardIterator __brick_last) { |
| return std::find(std::__remove_parallel_policy(__policy), __brick_first, __brick_last, __value); |
| }, |
| less<>{}, |
| true); |
| }); |
| } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> && |
| __is_cpp17_random_access_iterator<_ForwardIterator>::value) { |
| using __diff_t = __iter_diff_t<_ForwardIterator>; |
| return __pstl::__unseq_backend::__simd_first( |
| __first, __diff_t(0), __last - __first, [&__value](_ForwardIterator __iter, __diff_t __i) { |
| return __iter[__i] == __value; |
| }); |
| } else { |
| return std::find(__first, __last, __value); |
| } |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Predicate, |
| enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI _ForwardIterator |
| find_if(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) { |
| if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> && |
| __is_cpp17_random_access_iterator<_ForwardIterator>::value) { |
| return std::__terminate_on_exception([&] { |
| return __pstl::__internal::__parallel_find( |
| __pstl::__internal::__par_backend_tag{}, |
| __policy, |
| __first, |
| __last, |
| [&__policy, &__pred](_ForwardIterator __brick_first, _ForwardIterator __brick_last) { |
| return std::find_if(std::__remove_parallel_policy(__policy), __brick_first, __brick_last, __pred); |
| }, |
| less<>{}, |
| true); |
| }); |
| } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> && |
| __is_cpp17_random_access_iterator<_ForwardIterator>::value) { |
| using __diff_t = __iter_diff_t<_ForwardIterator>; |
| return __pstl::__unseq_backend::__simd_first( |
| __first, __diff_t(0), __last - __first, [&__pred](_ForwardIterator __iter, __diff_t __i) { |
| return __pred(__iter[__i]); |
| }); |
| } else { |
| return std::find_if(__first, __last, __pred); |
| } |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Predicate, |
| enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI _ForwardIterator |
| find_if_not(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) { |
| return std::find_if(__policy, __first, __last, [&](__iter_reference<_ForwardIterator> __value) { |
| return !__pred(__value); |
| }); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| #endif // _LIBCPP___ALGORITHM_PSTL_FIND_H |