// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// 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_MEMORY_IMPL_H
#define _PSTL_MEMORY_IMPL_H

#include <iterator>

#include "pstl_config.h"
#include "unseq_backend_simd.h"

namespace __pstl {
namespace __internal {

//------------------------------------------------------------------------
// uninitialized_move
//------------------------------------------------------------------------

template <typename _ForwardIterator, typename _OutputIterator>
_OutputIterator __brick_uninitialized_move(
    _ForwardIterator __first,
    _ForwardIterator __last,
    _OutputIterator __result,
    /*vector=*/std::false_type) noexcept {
  using _ValueType = typename std::iterator_traits<_OutputIterator>::value_type;
  for (; __first != __last; ++__first, ++__result) {
    ::new (std::addressof(*__result)) _ValueType(std::move(*__first));
  }
  return __result;
}

template <typename _RandomAccessIterator, typename _OutputIterator>
_OutputIterator __brick_uninitialized_move(
    _RandomAccessIterator __first,
    _RandomAccessIterator __last,
    _OutputIterator __result,
    /*vector=*/std::true_type) noexcept {
  using __ValueType     = typename std::iterator_traits<_OutputIterator>::value_type;
  using _ReferenceType1 = typename std::iterator_traits<_RandomAccessIterator>::reference;
  using _ReferenceType2 = typename std::iterator_traits<_OutputIterator>::reference;

  return __unseq_backend::__simd_walk_2(
      __first, __last - __first, __result, [](_ReferenceType1 __x, _ReferenceType2 __y) {
        ::new (std::addressof(__y)) __ValueType(std::move(__x));
      });
}

template <typename _Iterator>
void __brick_destroy(_Iterator __first, _Iterator __last, /*vector*/ std::false_type) noexcept {
  using _ValueType = typename std::iterator_traits<_Iterator>::value_type;

  for (; __first != __last; ++__first)
    __first->~_ValueType();
}

template <typename _RandomAccessIterator>
void __brick_destroy(_RandomAccessIterator __first, _RandomAccessIterator __last, /*vector*/ std::true_type) noexcept {
  using _ValueType     = typename std::iterator_traits<_RandomAccessIterator>::value_type;
  using _ReferenceType = typename std::iterator_traits<_RandomAccessIterator>::reference;

  __unseq_backend::__simd_walk_1(__first, __last - __first, [](_ReferenceType __x) { __x.~_ValueType(); });
}

//------------------------------------------------------------------------
// uninitialized copy
//------------------------------------------------------------------------

template <typename _ForwardIterator, typename _OutputIterator>
_OutputIterator __brick_uninitialized_copy(
    _ForwardIterator __first,
    _ForwardIterator __last,
    _OutputIterator __result,
    /*vector=*/std::false_type) noexcept {
  using _ValueType = typename std::iterator_traits<_OutputIterator>::value_type;
  for (; __first != __last; ++__first, ++__result) {
    ::new (std::addressof(*__result)) _ValueType(*__first);
  }
  return __result;
}

template <typename _RandomAccessIterator, typename _OutputIterator>
_OutputIterator __brick_uninitialized_copy(
    _RandomAccessIterator __first,
    _RandomAccessIterator __last,
    _OutputIterator __result,
    /*vector=*/std::true_type) noexcept {
  using __ValueType     = typename std::iterator_traits<_OutputIterator>::value_type;
  using _ReferenceType1 = typename std::iterator_traits<_RandomAccessIterator>::reference;
  using _ReferenceType2 = typename std::iterator_traits<_OutputIterator>::reference;

  return __unseq_backend::__simd_walk_2(
      __first, __last - __first, __result, [](_ReferenceType1 __x, _ReferenceType2 __y) {
        ::new (std::addressof(__y)) __ValueType(__x);
      });
}

} // namespace __internal
} // namespace __pstl

#endif /* _PSTL_MEMORY_IMPL_H */
