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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_CLLUTALLOCATOR_H
#define ARM_COMPUTE_CLLUTALLOCATOR_H
#include "arm_compute/runtime/ILutAllocator.h"
#include "arm_compute/core/CL/OpenCL.h"
#include <cstdint>
namespace arm_compute
{
/** Basic implementation of a CL memory LUT allocator. */
class CLLutAllocator : public ILutAllocator
{
public:
/** Default constructor. */
CLLutAllocator();
/** Default destructor. */
~CLLutAllocator() = default;
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLLutAllocator(const CLLutAllocator &) = delete;
/** Prevent instances of this class from being copy assigned (As this class contains pointers) */
const CLLutAllocator &operator=(const CLLutAllocator &) = delete;
/** Interface to be implemented by the child class to return the pointer to the mapped data.
*
* @return pointer to the mapped data.
*/
uint8_t *data();
/** Interface to be implemented by the child class to return the pointer to the CL data.
*
* @return pointer to the CL data.
*/
const cl::Buffer &cl_data() const;
/** Enqueue a map operation of the allocated buffer on the given queue.
*
* @param[in,out] q The CL command queue to use for the mapping operation.
* @param[in] blocking If true, then the mapping will be ready to use by the time
* this method returns, else it is the caller's responsibility
* to flush the queue and wait for the mapping operation to have completed before using the returned mapping pointer.
*
* @return The mapping address.
*/
uint8_t *map(cl::CommandQueue &q, bool blocking);
/** Enqueue an unmap operation of the allocated buffer on the given queue.
*
* @note This method simply enqueue the unmap operation, it is the caller's responsibility to flush the queue and make sure the unmap is finished before
* the memory is accessed by the device.
*
* @param[in,out] q The CL command queue to use for the mapping operation.
* @param[in] mapping The cpu mapping to unmap.
*/
void unmap(cl::CommandQueue &q, uint8_t *mapping);
protected:
/** Allocate num_elements() * sizeof(type()) of OpenCL memory. */
void allocate() override;
/** Call map() on the OpenCL buffer.
*
* @return A pointer to the beginning of the LUT's allocation.
*/
uint8_t *lock() override;
/** Call unmap() on the OpenCL buffer. */
void unlock() override;
private:
cl::Buffer _buffer; /**< OpenCL buffer containing the LUT data. */
uint8_t *_mapping; /**< Pointer to the CPU mapping of the OpenCL buffer. */
};
}
#endif /* ARM_COMPUTE_CLLUTALLOCATOR_H */
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