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author | Dimitry Andric <dim@FreeBSD.org> | 2023-12-18 20:30:12 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2024-04-06 20:11:55 +0000 |
commit | 5f757f3ff9144b609b3c433dfd370cc6bdc191ad (patch) | |
tree | 1b4e980b866cd26a00af34c0a653eb640bd09caf /contrib/llvm-project/libcxx/include/__algorithm/pstl_copy.h | |
parent | 3e1c8a35f741a5d114d0ba670b15191355711fe9 (diff) | |
parent | 312c0ed19cc5276a17bacf2120097bec4515b0f1 (diff) |
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__algorithm/pstl_copy.h')
-rw-r--r-- | contrib/llvm-project/libcxx/include/__algorithm/pstl_copy.h | 73 |
1 files changed, 65 insertions, 8 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/pstl_copy.h b/contrib/llvm-project/libcxx/include/__algorithm/pstl_copy.h index 83c712c35407..19f275a0d5d9 100644 --- a/contrib/llvm-project/libcxx/include/__algorithm/pstl_copy.h +++ b/contrib/llvm-project/libcxx/include/__algorithm/pstl_copy.h @@ -10,15 +10,19 @@ #define _LIBCPP___ALGORITHM_PSTL_COPY_H #include <__algorithm/copy_n.h> +#include <__algorithm/pstl_backend.h> +#include <__algorithm/pstl_frontend_dispatch.h> #include <__algorithm/pstl_transform.h> #include <__config> #include <__functional/identity.h> -#include <__iterator/iterator_traits.h> +#include <__iterator/concepts.h> #include <__type_traits/enable_if.h> #include <__type_traits/is_constant_evaluated.h> #include <__type_traits/is_execution_policy.h> #include <__type_traits/is_trivially_copyable.h> #include <__type_traits/remove_cvref.h> +#include <__utility/move.h> +#include <optional> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header @@ -30,26 +34,79 @@ _LIBCPP_BEGIN_NAMESPACE_STD // TODO: Use the std::copy/move shenanigans to forward to std::memmove +template <class> +void __pstl_copy(); + template <class _ExecutionPolicy, class _ForwardIterator, class _ForwardOutIterator, - enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0> + class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, + enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> +__copy(_ExecutionPolicy&& __policy, + _ForwardIterator&& __first, + _ForwardIterator&& __last, + _ForwardOutIterator&& __result) noexcept { + return std::__pstl_frontend_dispatch( + _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_copy, _RawPolicy), + [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _ForwardOutIterator __g_result) { + return std::__transform(__policy, __g_first, __g_last, __g_result, __identity()); + }, + std::move(__first), + std::move(__last), + std::move(__result)); +} + +template <class _ExecutionPolicy, + class _ForwardIterator, + class _ForwardOutIterator, + class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, + enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator copy(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _ForwardOutIterator __result) { - return std::transform(__policy, __first, __last, __result, __identity()); + auto __res = std::__copy(__policy, std::move(__first), std::move(__last), std::move(__result)); + if (!__res) + std::__throw_bad_alloc(); + return *std::move(__res); +} + +template <class> +void __pstl_copy_n(); + +template <class _ExecutionPolicy, + class _ForwardIterator, + class _ForwardOutIterator, + class _Size, + class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, + enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> __copy_n( + _ExecutionPolicy&& __policy, _ForwardIterator&& __first, _Size&& __n, _ForwardOutIterator&& __result) noexcept { + return std::__pstl_frontend_dispatch( + _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_copy_n, _RawPolicy), + [&__policy]( + _ForwardIterator __g_first, _Size __g_n, _ForwardOutIterator __g_result) -> optional<_ForwardIterator> { + if constexpr (__has_random_access_iterator_category_or_concept<_ForwardIterator>::value) + return std::__copy(__policy, std::move(__g_first), std::move(__g_first + __g_n), std::move(__g_result)); + else + return std::copy_n(__g_first, __g_n, __g_result); + }, + std::move(__first), + std::move(__n), + std::move(__result)); } template <class _ExecutionPolicy, class _ForwardIterator, class _ForwardOutIterator, class _Size, - enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0> + class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, + enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator copy_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _ForwardOutIterator __result) { - if constexpr (__has_random_access_iterator_category<_ForwardIterator>::value) - return std::copy(__policy, __first, __first + __n, __result); - else - return std::copy_n(__first, __n, __result); + auto __res = std::__copy_n(__policy, std::move(__first), std::move(__n), std::move(__result)); + if (!__res) + std::__throw_bad_alloc(); + return *std::move(__res); } _LIBCPP_END_NAMESPACE_STD |