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//===----------------------------------------------------------------------===//
//
// 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 <__functional/operations.h>
#include <__iterator/iterator_traits.h>
#include <__pstl/internal/execution_impl.h>
#include <__pstl/internal/parallel_impl.h>
#include <__pstl/internal/unseq_backend_simd.h>
#include <__type_traits/enable_if.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
|
