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/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
*
* 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.
*/
#ifndef __NEURUN_UTIL_OBJECT_MANAGER_H__
#define __NEURUN_UTIL_OBJECT_MANAGER_H__
#include <unordered_map>
#include <memory>
namespace neurun
{
namespace util
{
/**
* @brief Class that owns objects and maps them with indices as a handle for them
*
*/
template <typename Index, typename Object> class ObjectManager
{
public:
ObjectManager() : _index_count{0u} {}
public:
/**
* @brief Create an object with args and put it in the container with a new Index for that
*
* @param[in] args Arguments for creating Operand object
* @return Created index that is associated to the object
*/
template <class... Args> Index emplace(Args &&... args)
{
auto index = generateIndex();
_objects.emplace(index, nnfw::cpp14::make_unique<Object>(std::forward<Args>(args)...));
return index;
}
/**
* @brief Put object in the container with a new Index for that
*
* @param[in] object Object to be pushed
* @return Created index that is associated to the object
*/
Index push(std::unique_ptr<Object> &&object)
{
auto index = generateIndex();
_objects.emplace(index, std::move(object));
return index;
}
/**
* @brief Remove the object that is associated with the given index
*
* @param[in] index Index of the object to be removed
* @return N/A
*/
void remove(const Index &index) { _objects.erase(index); };
/**
* @brief Get the object that is associated with the given index
*
* @param[in] index Index of the object to be returned
* @return Object
*/
const Object &at(const Index &index) const { return *(_objects.at(index)); }
/**
* @brief Get the object that is associated with the given index
*
* @param[in] index Index of the object to be returned
* @return Object
*/
Object &at(const Index &index) { return *(_objects.at(index)); }
/**
* @brief Get the object that is associated with the given index
*
* @param[in] index Index of the object to be returned
* @return true if such entry exists otherwise false
*/
bool exist(const Index &index) const
{
auto it = _objects.find(index);
return it != _objects.end();
}
/**
* @brief Iterate over the container with given function
*
* @param[in] fn Function to be run for every container entry
* @return N/A
*/
void iterate(const std::function<void(const Index &, const Object &)> &fn) const
{
for (const auto &e : _objects)
{
fn(e.first, *e.second);
}
}
/**
* @brief Iterate over the container with given function
*
* @param[in] fn Function to be run for every container entry
* @return N/A
*/
void iterate(const std::function<void(const Index &, Object &)> &fn)
{
// TODO Remove this workaround
// This implementation is a workaround in case of adding operands while iteration
std::list<Index> l;
for (auto &e : _objects)
{
l.push_back(e.first);
}
for (auto index : l)
{
fn(index, *_objects[index]);
}
}
private:
Index generateIndex() { return Index{_index_count++}; }
private:
std::unordered_map<Index, std::unique_ptr<Object>> _objects;
uint32_t _index_count;
};
} // namespace util
} // namespace neurun
#endif // __NEURUN_UTIL_OBJECT_MANAGER_H__
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