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/*
* Copyright (c) 2018-2019 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_GRAPH_IDEVICEBACKEND_H
#define ARM_COMPUTE_GRAPH_IDEVICEBACKEND_H
#include "arm_compute/graph/ITensorHandle.h"
#include "arm_compute/graph/Types.h"
#include "arm_compute/runtime/IFunction.h"
#include "arm_compute/runtime/IMemoryManager.h"
#include "arm_compute/runtime/IWeightsManager.h"
#include <memory>
namespace arm_compute
{
namespace graph
{
// Forward declarations
class Graph;
class GraphContext;
class Tensor;
class INode;
namespace backends
{
/** Device backend interface */
class IDeviceBackend
{
public:
/** Virtual Destructor */
virtual ~IDeviceBackend() = default;
/** Initializes the backend */
virtual void initialize_backend() = 0;
/** Setups the given graph context
*
* @param[in,out] ctx Graph context
*/
virtual void setup_backend_context(GraphContext &ctx) = 0;
/** Release the backend specific resources associated to a given graph context
*
* @param[in,out] ctx Graph context
*/
virtual void release_backend_context(GraphContext &ctx) = 0;
/** Checks if an instantiated backend is actually supported
*
* @return True if the backend is supported else false
*/
virtual bool is_backend_supported() = 0;
/** Gets a backend memory allocator
*
* @return Backend memory allocator
*/
virtual IAllocator *backend_allocator() = 0;
/** Create a backend Tensor
*
* @param[in] tensor The tensor we want to create a backend tensor for
*
* @return Backend tensor handle
*/
virtual std::unique_ptr<ITensorHandle> create_tensor(const Tensor &tensor) = 0;
/** Create a backend Sub-Tensor
*
* @param[in] parent Parent sub-tensor handle
* @param[in] shape Shape of the sub-tensor
* @param[in] coords Starting coordinates of the sub-tensor
* @param[in] extend_parent Extends parent shape if true
*
* @return Backend sub-tensor handle
*/
virtual std::unique_ptr<ITensorHandle> create_subtensor(ITensorHandle *parent, TensorShape shape, Coordinates coords, bool extend_parent) = 0;
/** Configure a backend Node
*
* @note This creates an appropriate configured backend function for the given node
*
* @param[in] node The node we want to configure
* @param[in] ctx Context to use
*
* @return Backend execution function
*/
virtual std::unique_ptr<arm_compute::IFunction> configure_node(INode &node, GraphContext &ctx) = 0;
/** Validate a node
*
* @param[in] node The node we want to validate
*
* @return An error status
*/
virtual Status validate_node(INode &node) = 0;
/** Create a backend memory manager given its affinity
*
* @param[in] affinity Memory Manager affinity
*
* @return Memory manager
*/
virtual std::shared_ptr<arm_compute::IMemoryManager> create_memory_manager(MemoryManagerAffinity affinity) = 0;
/** Create a backend weights manager
*
* @return Weights manager
*/
virtual std::shared_ptr<arm_compute::IWeightsManager> create_weights_manager() = 0;
};
} // namespace backends
} // namespace graph
} // namespace arm_compute
#endif //ARM_COMPUTE_GRAPH_IDEVICEBACKEND_H
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