libstdc++-v3/include/pstl/glue_memory_impl.h

// -*- C++ -*-
//===-- glue_memory_impl.h ------------------------------------------------===//
//
// 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 _PSTL_GLUE_MEMORY_IMPL_H
#define _PSTL_GLUE_MEMORY_IMPL_H

#include "utils.h"
#include "algorithm_fwd.h"

namespace std
{

// [uninitialized.copy]

template <class _ExecutionPolicy, class _InputIterator, class _ForwardIterator>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
uninitialized_copy(_ExecutionPolicy&& __exec, _InputIterator __first, _InputIterator __last, _ForwardIterator __result)
{
    typedef typename iterator_traits<_InputIterator>::value_type _ValueType1;
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType2;
    typedef typename iterator_traits<_InputIterator>::reference _ReferenceType1;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType2;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::integral_constant < bool, std::is_trivial<_ValueType1>::value&& std::is_trivial<_ValueType2>::value > (),
        [&]() {
            return __pstl::__internal::__pattern_walk2_brick(
                std::forward<_ExecutionPolicy>(__exec), __first, __last, __result,
                [__is_vector](_InputIterator __begin, _InputIterator __end, _ForwardIterator __res) {
                    return __pstl::__internal::__brick_copy(__begin, __end, __res, __is_vector);
                },
                __is_parallel);
        },
        [&]() {
            return __pstl::__internal::__pattern_walk2(std::forward<_ExecutionPolicy>(__exec), __first, __last,
                                                       __result,
                                                       [](_ReferenceType1 __val1, _ReferenceType2 __val2) {
                                                           ::new (std::addressof(__val2)) _ValueType2(__val1);
                                                       },
                                                       __is_vector, __is_parallel);
        });
}

template <class _ExecutionPolicy, class _InputIterator, class _Size, class _ForwardIterator>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
uninitialized_copy_n(_ExecutionPolicy&& __exec, _InputIterator __first, _Size __n, _ForwardIterator __result)
{
    typedef typename iterator_traits<_InputIterator>::value_type _ValueType1;
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType2;
    typedef typename iterator_traits<_InputIterator>::reference _ReferenceType1;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType2;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::integral_constant < bool, std::is_trivial<_ValueType1>::value&& std::is_trivial<_ValueType2>::value > (),
        [&]() {
            return __pstl::__internal::__pattern_walk2_brick_n(
                std::forward<_ExecutionPolicy>(__exec), __first, __n, __result,
                [__is_vector](_InputIterator __begin, _Size __sz, _ForwardIterator __res) {
                    return __pstl::__internal::__brick_copy_n(__begin, __sz, __res, __is_vector);
                },
                __is_parallel);
        },
        [&]() {
            return __pstl::__internal::__pattern_walk2_n(std::forward<_ExecutionPolicy>(__exec), __first, __n, __result,
                                                         [](_ReferenceType1 __val1, _ReferenceType2 __val2) {
                                                             ::new (std::addressof(__val2)) _ValueType2(__val1);
                                                         },
                                                         __is_vector, __is_parallel);
        });
}

// [uninitialized.move]

template <class _ExecutionPolicy, class _InputIterator, class _ForwardIterator>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
uninitialized_move(_ExecutionPolicy&& __exec, _InputIterator __first, _InputIterator __last, _ForwardIterator __result)
{
    typedef typename iterator_traits<_InputIterator>::value_type _ValueType1;
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType2;
    typedef typename iterator_traits<_InputIterator>::reference _ReferenceType1;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType2;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::integral_constant < bool, std::is_trivial<_ValueType1>::value&& std::is_trivial<_ValueType2>::value > (),
        [&]() {
            return __pstl::__internal::__pattern_walk2_brick(
                std::forward<_ExecutionPolicy>(__exec), __first, __last, __result,
                [__is_vector](_InputIterator __begin, _InputIterator __end, _ForwardIterator __res) {
                    return __pstl::__internal::__brick_copy(__begin, __end, __res, __is_vector);
                },
                __is_parallel);
        },
        [&]() {
            return __pstl::__internal::__pattern_walk2(
                std::forward<_ExecutionPolicy>(__exec), __first, __last, __result,
                [](_ReferenceType1 __val1, _ReferenceType2 __val2) {
                    ::new (std::addressof(__val2)) _ValueType2(std::move(__val1));
                },
                __is_vector, __is_parallel);
        });
}

template <class _ExecutionPolicy, class _InputIterator, class _Size, class _ForwardIterator>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
uninitialized_move_n(_ExecutionPolicy&& __exec, _InputIterator __first, _Size __n, _ForwardIterator __result)
{
    typedef typename iterator_traits<_InputIterator>::value_type _ValueType1;
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType2;
    typedef typename iterator_traits<_InputIterator>::reference _ReferenceType1;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType2;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _InputIterator, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::integral_constant < bool, std::is_trivial<_ValueType1>::value&& std::is_trivial<_ValueType2>::value > (),
        [&]() {
            return __pstl::__internal::__pattern_walk2_brick_n(
                std::forward<_ExecutionPolicy>(__exec), __first, __n, __result,
                [__is_vector](_InputIterator __begin, _Size __sz, _ForwardIterator __res) {
                    return __pstl::__internal::__brick_copy_n(__begin, __sz, __res, __is_vector);
                },
                __is_parallel);
        },
        [&]() {
            return __pstl::__internal::__pattern_walk2_n(std::forward<_ExecutionPolicy>(__exec), __first, __n, __result,
                                                         [](_ReferenceType1 __val1, _ReferenceType2 __val2) {
                                                             ::new (std::addressof(__val2))
                                                                 _ValueType2(std::move(__val1));
                                                         },
                                                         __is_vector, __is_parallel);
        });
}

// [uninitialized.fill]

template <class _ExecutionPolicy, class _ForwardIterator, class _Tp>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void>
uninitialized_fill(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    __pstl::__internal::__invoke_if_else(
        std::is_arithmetic<_ValueType>(),
        [&]() {
            __pstl::__internal::__pattern_walk_brick(
                std::forward<_ExecutionPolicy>(__exec), __first, __last,
                [&__value, &__is_vector](_ForwardIterator __begin, _ForwardIterator __end) {
                    __pstl::__internal::__brick_fill(__begin, __end, _ValueType(__value), __is_vector);
                },
                __is_parallel);
        },
        [&]() {
            __pstl::__internal::__pattern_walk1(
                std::forward<_ExecutionPolicy>(__exec), __first, __last,
                [&__value](_ReferenceType __val) { ::new (std::addressof(__val)) _ValueType(__value); }, __is_vector,
                __is_parallel);
        });
}

template <class _ExecutionPolicy, class _ForwardIterator, class _Size, class _Tp>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
uninitialized_fill_n(_ExecutionPolicy&& __exec, _ForwardIterator __first, _Size __n, const _Tp& __value)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::is_arithmetic<_ValueType>(),
        [&]() {
            return __pstl::__internal::__pattern_walk_brick_n(
                std::forward<_ExecutionPolicy>(__exec), __first, __n,
                [&__value, &__is_vector](_ForwardIterator __begin, _Size __count) {
                    return __pstl::__internal::__brick_fill_n(__begin, __count, _ValueType(__value), __is_vector);
                },
                __is_parallel);
        },
        [&]() {
            return __pstl::__internal::__pattern_walk1_n(
                std::forward<_ExecutionPolicy>(__exec), __first, __n,
                [&__value](_ReferenceType __val) { ::new (std::addressof(__val)) _ValueType(__value); }, __is_vector,
                __is_parallel);
        });
}

// [specialized.destroy]

template <class _ExecutionPolicy, class _ForwardIterator>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void>
destroy(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    __pstl::__internal::__invoke_if_not(std::is_trivially_destructible<_ValueType>(), [&]() {
        __pstl::__internal::__pattern_walk1(std::forward<_ExecutionPolicy>(__exec), __first, __last,
                                            [](_ReferenceType __val) { __val.~_ValueType(); }, __is_vector,
                                            __is_parallel);
    });
}

template <class _ExecutionPolicy, class _ForwardIterator, class _Size>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
destroy_n(_ExecutionPolicy&& __exec, _ForwardIterator __first, _Size __n)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::is_trivially_destructible<_ValueType>(), [&]() { return std::next(__first, __n); },
        [&]() {
            return __pstl::__internal::__pattern_walk1_n(std::forward<_ExecutionPolicy>(__exec), __first, __n,
                                                         [](_ReferenceType __val) { __val.~_ValueType(); }, __is_vector,
                                                         __is_parallel);
        });
}

// [uninitialized.construct.default]

template <class _ExecutionPolicy, class _ForwardIterator>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void>
uninitialized_default_construct(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    __pstl::__internal::__invoke_if_not(std::is_trivial<_ValueType>(), [&]() {
        __pstl::__internal::__pattern_walk1(std::forward<_ExecutionPolicy>(__exec), __first, __last,
                                            [](_ReferenceType __val) { ::new (std::addressof(__val)) _ValueType; },
                                            __is_vector, __is_parallel);
    });
}

template <class _ExecutionPolicy, class _ForwardIterator, class _Size>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
uninitialized_default_construct_n(_ExecutionPolicy&& __exec, _ForwardIterator __first, _Size __n)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::is_trivial<_ValueType>(), [&]() { return std::next(__first, __n); },
        [&]() {
            return __pstl::__internal::__pattern_walk1_n(
                std::forward<_ExecutionPolicy>(__exec), __first, __n,
                [](_ReferenceType __val) { ::new (std::addressof(__val)) _ValueType; }, __is_vector, __is_parallel);
        });
}

// [uninitialized.construct.value]

template <class _ExecutionPolicy, class _ForwardIterator>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void>
uninitialized_value_construct(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    __pstl::__internal::__invoke_if_else(
        std::is_trivial<_ValueType>(),
        [&]() {
            __pstl::__internal::__pattern_walk_brick(std::forward<_ExecutionPolicy>(__exec), __first, __last,
                                                     [__is_vector](_ForwardIterator __begin, _ForwardIterator __end) {
                                                         __pstl::__internal::__brick_fill(__begin, __end, _ValueType(),
                                                                                          __is_vector);
                                                     },
                                                     __is_parallel);
        },
        [&]() {
            __pstl::__internal::__pattern_walk1(
                std::forward<_ExecutionPolicy>(__exec), __first, __last,
                [](_ReferenceType __val) { ::new (std::addressof(__val)) _ValueType(); }, __is_vector, __is_parallel);
        });
}

template <class _ExecutionPolicy, class _ForwardIterator, class _Size>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator>
uninitialized_value_construct_n(_ExecutionPolicy&& __exec, _ForwardIterator __first, _Size __n)
{
    typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
    typedef typename iterator_traits<_ForwardIterator>::reference _ReferenceType;

    const auto __is_parallel =
        __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);
    const auto __is_vector =
        __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec);

    return __pstl::__internal::__invoke_if_else(
        std::is_trivial<_ValueType>(),
        [&]() {
            return __pstl::__internal::__pattern_walk_brick_n(std::forward<_ExecutionPolicy>(__exec), __first, __n,
                                                              [__is_vector](_ForwardIterator __begin, _Size __count) {
                                                                  return __pstl::__internal::__brick_fill_n(
                                                                      __begin, __count, _ValueType(), __is_vector);
                                                              },
                                                              __is_parallel);
        },
        [&]() {
            return __pstl::__internal::__pattern_walk1_n(
                std::forward<_ExecutionPolicy>(__exec), __first, __n,
                [](_ReferenceType __val) { ::new (std::addressof(__val)) _ValueType(); }, __is_vector, __is_parallel);
        });
}

} // namespace std

#endif /* _PSTL_GLUE_MEMORY_IMPL_H */