95 lines
3.8 KiB
C++
95 lines
3.8 KiB
C++
/*
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* Copyright (c) 2016-2019 Arm Limited.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef ARM_COMPUTE_CLLUTALLOCATOR_H
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#define ARM_COMPUTE_CLLUTALLOCATOR_H
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#include "arm_compute/runtime/ILutAllocator.h"
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#include "arm_compute/core/CL/OpenCL.h"
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#include <cstdint>
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namespace arm_compute
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{
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/** Basic implementation of a CL memory LUT allocator. */
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class CLLutAllocator : public ILutAllocator
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{
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public:
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/** Default constructor. */
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CLLutAllocator();
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/** Default destructor. */
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~CLLutAllocator() = default;
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/** Prevent instances of this class from being copied (As this class contains pointers) */
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CLLutAllocator(const CLLutAllocator &) = delete;
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/** Prevent instances of this class from being copy assigned (As this class contains pointers) */
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const CLLutAllocator &operator=(const CLLutAllocator &) = delete;
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/** Interface to be implemented by the child class to return the pointer to the mapped data.
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*
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* @return pointer to the mapped data.
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*/
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uint8_t *data();
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/** Interface to be implemented by the child class to return the pointer to the CL data.
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*
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* @return pointer to the CL data.
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*/
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const cl::Buffer &cl_data() const;
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/** Enqueue a map operation of the allocated buffer on the given queue.
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*
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* @param[in,out] q The CL command queue to use for the mapping operation.
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* @param[in] blocking If true, then the mapping will be ready to use by the time
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* this method returns, else it is the caller's responsibility
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* to flush the queue and wait for the mapping operation to have completed before using the returned mapping pointer.
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*
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* @return The mapping address.
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*/
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uint8_t *map(cl::CommandQueue &q, bool blocking);
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/** Enqueue an unmap operation of the allocated buffer on the given queue.
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*
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* @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
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* the memory is accessed by the device.
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*
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* @param[in,out] q The CL command queue to use for the mapping operation.
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* @param[in] mapping The cpu mapping to unmap.
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*/
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void unmap(cl::CommandQueue &q, uint8_t *mapping);
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protected:
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/** Allocate num_elements() * sizeof(type()) of OpenCL memory. */
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void allocate() override;
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/** Call map() on the OpenCL buffer.
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*
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* @return A pointer to the beginning of the LUT's allocation.
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*/
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uint8_t *lock() override;
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/** Call unmap() on the OpenCL buffer. */
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void unlock() override;
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private:
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cl::Buffer _buffer; /**< OpenCL buffer containing the LUT data. */
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uint8_t *_mapping; /**< Pointer to the CPU mapping of the OpenCL buffer. */
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};
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}
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#endif /* ARM_COMPUTE_CLLUTALLOCATOR_H */
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