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//
// Copyright © 2019-2023 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#pragma once
#include <armnn/backends/TensorHandle.hpp>
#include "RefMemoryManager.hpp"
namespace armnn
{
class RefTensorHandleDecorator;
// An implementation of ITensorHandle with simple "bump the pointer" memory-management behaviour
class RefTensorHandle : public ITensorHandle
{
public:
RefTensorHandle(const TensorInfo& tensorInfo, std::shared_ptr<RefMemoryManager>& memoryManager);
RefTensorHandle(const TensorInfo& tensorInfo);
RefTensorHandle(const TensorInfo& tensorInfo, const RefTensorHandle& parent);
~RefTensorHandle();
virtual void Manage() override;
virtual void Allocate() override;
virtual ITensorHandle* GetParent() const override
{
return nullptr;
}
virtual const void* Map(bool /* blocking = true */) const override;
using ITensorHandle::Map;
virtual void Unmap() const override
{}
TensorShape GetStrides() const override
{
return GetUnpaddedTensorStrides(m_TensorInfo);
}
TensorShape GetShape() const override
{
return m_TensorInfo.GetShape();
}
const TensorInfo& GetTensorInfo() const
{
return m_TensorInfo;
}
virtual MemorySourceFlags GetImportFlags() const override;
virtual bool Import(void* memory, MemorySource source) override;
virtual bool CanBeImported(void* memory, MemorySource source) override;
virtual std::shared_ptr<ITensorHandle> DecorateTensorHandle(const TensorInfo& tensorInfo) override;
private:
// Only used for testing
void CopyOutTo(void*) const override;
void CopyInFrom(const void*) override;
void* GetPointer() const;
RefTensorHandle(const RefTensorHandle& other) = delete; // noncopyable
RefTensorHandle& operator=(const RefTensorHandle& other) = delete; //noncopyable
TensorInfo m_TensorInfo;
mutable std::shared_ptr<RefMemoryManager> m_MemoryManager;
RefMemoryManager::Pool* m_Pool;
mutable void* m_UnmanagedMemory;
void* m_ImportedMemory;
std::vector<std::shared_ptr<RefTensorHandleDecorator>> m_Decorated;
};
class RefTensorHandleDecorator : public RefTensorHandle
{
public:
RefTensorHandleDecorator(const TensorInfo& tensorInfo, const RefTensorHandle& parent);
~RefTensorHandleDecorator() = default;
virtual void Manage() override;
virtual void Allocate() override;
virtual ITensorHandle* GetParent() const override
{
return nullptr;
}
virtual const void* Map(bool /* blocking = true */) const override;
using ITensorHandle::Map;
virtual void Unmap() const override
{}
TensorShape GetStrides() const override
{
return GetUnpaddedTensorStrides(m_TensorInfo);
}
TensorShape GetShape() const override
{
return m_TensorInfo.GetShape();
}
const TensorInfo& GetTensorInfo() const
{
return m_TensorInfo;
}
virtual MemorySourceFlags GetImportFlags() const override;
virtual bool Import(void* memory, MemorySource source) override;
virtual bool CanBeImported(void* memory, MemorySource source) override;
virtual std::shared_ptr<ITensorHandle> DecorateTensorHandle(const TensorInfo& tensorInfo) override;
/// Map the tensor data for access. Must be paired with call to Unmap().
/// \param blocking hint to block the calling thread until all other accesses are complete. (backend dependent)
/// \return pointer to the first element of the mapped data.
void* Map(bool blocking=true)
{
return const_cast<void*>(static_cast<const ITensorHandle*>(this)->Map(blocking));
}
/// Unmap the tensor data that was previously mapped with call to Map().
void Unmap()
{
return static_cast<const ITensorHandle*>(this)->Unmap();
}
/// Testing support to be able to verify and set tensor data content
void CopyOutTo(void* /* memory */) const override
{};
void CopyInFrom(const void* /* memory */) override
{};
/// Unimport externally allocated memory
void Unimport() override
{};
private:
TensorInfo m_TensorInfo;
const RefTensorHandle& m_Parent;
};
}
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