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/*
* Copyright (c) 2016-2019 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_ILUTALLOCATOR_H
#define ARM_COMPUTE_ILUTALLOCATOR_H
#include "arm_compute/core/Types.h"
#include <cstddef>
#include <cstdint>
namespace arm_compute
{
/** Basic interface to allocate LUTs' */
class ILutAllocator
{
public:
/** Default constructor */
ILutAllocator();
/** Default virtual destructor */
virtual ~ILutAllocator() = default;
/** Allow instances of this class to be move constructed */
ILutAllocator(ILutAllocator &&) = default;
/** Allow instances of this class to be moved */
ILutAllocator &operator=(ILutAllocator &&) = default;
/** Allocate an LUT of the requested number of elements and data_type.
*
* @param[in] num_elements Number of elements of the LUT.
* @param[in] data_type Data type of each element.
*/
void init(size_t num_elements, DataType data_type);
/** Returns the total number of elements in the LUT.
*
* @return Total number of elements.
*/
size_t num_elements() const;
/** Returns the type of the LUT.
*
* @return The type of the LUT.
*/
DataType type() const;
/** Returns the total size in bytes of the LUT.
*
* @return Total size of the LUT in bytes.
*/
size_t size() const;
protected:
/** Interface to be implemented by the child class to allocate the LUT. */
virtual void allocate() = 0;
/** Interface to be implemented by the child class to lock the memory allocation for the CPU to access.
*
* @return Pointer to a CPU mapping of the memory
*/
virtual uint8_t *lock() = 0;
/** Interface to be implemented by the child class to unlock the memory allocation after the CPU is done accessing it. */
virtual void unlock() = 0;
private:
size_t _num_elements; /**< Number of elements allocated */
DataType _data_type; /**< Data type of LUT elements. */
};
}
#endif /* ARM_COMPUTE_ILUTALLOCATOR_H */
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