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/*
* Copyright (c) 2018-2020 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_RUNTIME_MEMORY_REGION_H
#define ARM_COMPUTE_RUNTIME_MEMORY_REGION_H
#include "arm_compute/runtime/IMemoryRegion.h"
#include "arm_compute/core/Error.h"
#include "support/MemorySupport.h"
#include <cstddef>
namespace arm_compute
{
/** Memory region CPU implementation */
class MemoryRegion final : public IMemoryRegion
{
public:
/** Constructor
*
* @param[in] size Region size
* @param[in] alignment Alignment in bytes of the base pointer. Defaults to 0
*/
MemoryRegion(size_t size, size_t alignment = 0)
: IMemoryRegion(size), _mem(nullptr), _ptr(nullptr)
{
if(size != 0)
{
// Allocate backing memory
size_t space = size + alignment;
_mem = std::shared_ptr<uint8_t>(new uint8_t[space](), [](uint8_t *ptr)
{
delete[] ptr;
});
_ptr = _mem.get();
// Calculate alignment offset
if(alignment != 0)
{
void *aligned_ptr = _mem.get();
support::cpp11::align(alignment, size, aligned_ptr, space);
_ptr = aligned_ptr;
}
}
}
MemoryRegion(void *ptr, size_t size)
: IMemoryRegion(size), _mem(nullptr), _ptr(nullptr)
{
if(size != 0)
{
_ptr = ptr;
}
}
/** Prevent instances of this class from being copied (As this class contains pointers) */
MemoryRegion(const MemoryRegion &) = delete;
/** Default move constructor */
MemoryRegion(MemoryRegion &&) = default;
/** Prevent instances of this class from being copied (As this class contains pointers) */
MemoryRegion &operator=(const MemoryRegion &) = delete;
/** Default move assignment operator */
MemoryRegion &operator=(MemoryRegion &&) = default;
// Inherited methods overridden :
void *buffer() final
{
return _ptr;
}
const void *buffer() const final
{
return _ptr;
}
std::unique_ptr<IMemoryRegion> extract_subregion(size_t offset, size_t size) final
{
if(_ptr != nullptr && (offset < _size) && (_size - offset >= size))
{
return support::cpp14::make_unique<MemoryRegion>(static_cast<uint8_t *>(_ptr) + offset, size);
}
else
{
return nullptr;
}
}
protected:
std::shared_ptr<uint8_t> _mem;
void *_ptr;
};
} // namespace arm_compute
#endif /* ARM_COMPUTE_RUNTIME_MEMORY_REGION_H */
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