DoKReverseIndexer.h

/*
 * Copyright 2020 IFPEN-CEA
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#pragma once
 
#include <unordered_map>
 
#include <alien/utils/Precomp.h>
 
#include <alien/kernels/dok/IReverseIndexer.h>
 
namespace Alien
{
//! ReverseIndexer based on a HashTable
class ALIEN_EXPORT DoKReverseIndexer : public IReverseIndexer
{
 public:
  DoKReverseIndexer()
  : m_map()
  {}
  virtual ~DoKReverseIndexer() = default;
 
  std::optional<Index> operator[](Offset off) const override;
 
  void record(Offset off, Index i) override;
 
  Int32 size() const override { return static_cast<Int32>(m_map.size()); }
 
 private:
  typedef std::unordered_map<Offset, Index> HashTable;
  HashTable m_map;
};
 
} // namespace Alien