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/*
* Copyright (c) 2020 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 __ONERT_BACKEND_ITENSOR_REGISTRY__
#define __ONERT_BACKEND_ITENSOR_REGISTRY__
#include <memory>
#include "ir/Index.h"
#include "backend/ITensor.h"
namespace onert
{
namespace backend
{
struct ITensorRegistry
{
/**
* @brief Deconstruct itself
*/
virtual ~ITensorRegistry() = default;
/**
* @brief Returns pointer of ITensor among native and migrant tensors
*
* Native Tensor is a tensor that is managed by this backend
* Migrant Tensor is a tensor that is imported from another backend
*
* @note Return tensor cannot be used longer than dynamic tensor manager
*/
virtual std::shared_ptr<ITensor> getITensor(const ir::OperandIndex &) = 0;
/**
* @brief Returns pointer of ITensor among native tensors
*
* Unlike @c getITensor , this function only searches from native tensors
*
* @note Returned tensor cannot be used longer than dynamic tensor manager
*/
virtual std::shared_ptr<ITensor> getNativeITensor(const ir::OperandIndex &) = 0;
};
} // namespace backend
} // namespace onert
#include "ir/OperandIndexMap.h"
#include "backend/IPortableTensor.h"
namespace onert
{
namespace backend
{
/**
* @brief TensorRegistry template class for the convenience of backend implementations
*
* If a backend uses @c IPortableTensor , and there is no special reason to implement @c
* ITensorRegistry on your own, you may just use this default implementation.
*
* @tparam T_Tensor Tensor type. Must be a subclass of @c onert::backend::IPortableTensor .
*/
template <typename T_Tensor> class PortableTensorRegistryTemplate : public ITensorRegistry
{
public:
std::shared_ptr<ITensor> getITensor(const ir::OperandIndex &ind) override
{
static_assert(std::is_base_of<ITensor, T_Tensor>::value, "T_Tensor must derive from ITensor.");
auto external_tensor = _migrant.find(ind);
if (external_tensor != _migrant.end())
return external_tensor->second;
return getNativeTensor(ind);
}
std::shared_ptr<ITensor> getNativeITensor(const ir::OperandIndex &ind) override
{
return getNativeTensor(ind);
}
std::shared_ptr<IPortableTensor> getPortableTensor(const ir::OperandIndex &ind)
{
auto external_tensor = _migrant.find(ind);
if (external_tensor != _migrant.end())
{
if (external_tensor->second)
return external_tensor->second;
}
return getNativeTensor(ind);
}
std::shared_ptr<T_Tensor> getNativeTensor(const ir::OperandIndex &ind)
{
auto tensor = _native.find(ind);
if (tensor != _native.end())
return tensor->second;
return nullptr;
}
bool setMigrantTensor(const ir::OperandIndex &ind, const std::shared_ptr<IPortableTensor> &tensor)
{
// TODO Uncomment this as two tensors for an index is not allowed.
// But now it is temporarily allowed as a workaround. External one hides Managed one.
// auto itr = _native.find(ind);
// if (itr != _native.end() && itr->second != nullptr && tensor != nullptr)
// throw std::runtime_error{
// "Tried to set an migrant tensor but an native tensor already exists."};
_migrant[ind] = tensor;
return true;
}
void setNativeTensor(const ir::OperandIndex &ind, const std::shared_ptr<T_Tensor> &tensor)
{
auto itr = _migrant.find(ind);
if (itr != _migrant.end() && itr->second != nullptr && tensor != nullptr)
throw std::runtime_error{
"Tried to set a native tensor but an migrant tensor already exists."};
_native[ind] = tensor;
}
const ir::OperandIndexMap<std::shared_ptr<T_Tensor>> &native_tensors() { return _native; }
const ir::OperandIndexMap<std::shared_ptr<IPortableTensor>> &migrant_tensors()
{
return _migrant;
}
private:
ir::OperandIndexMap<std::shared_ptr<IPortableTensor>> _migrant;
ir::OperandIndexMap<std::shared_ptr<T_Tensor>> _native;
};
} // namespace backend
} // namespace onert
#endif // __ONERT_BACKEND_ITENSOR_REGISTRY__
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