| /* |
| * Copyright (c) 2018 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/ToolchainSupport.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; |
| } |
| 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__ */ |