| /* |
| * Copyright (c) 2017-2020 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_SUPPORT_MEMORYSUPPORT |
| #define ARM_COMPUTE_SUPPORT_MEMORYSUPPORT |
| |
| #include <memory> |
| |
| namespace arm_compute |
| { |
| namespace support |
| { |
| namespace cpp11 |
| { |
| // std::align is missing in GCC 4.9 |
| // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57350 |
| inline void *align(std::size_t alignment, std::size_t size, void *&ptr, std::size_t &space) |
| { |
| std::uintptr_t pn = reinterpret_cast<std::uintptr_t>(ptr); |
| std::uintptr_t aligned = (pn + alignment - 1) & -alignment; |
| std::size_t padding = aligned - pn; |
| if(space < size + padding) |
| { |
| return nullptr; |
| } |
| |
| space -= padding; |
| |
| return ptr = reinterpret_cast<void *>(aligned); |
| } |
| } //namespace cpp11 |
| namespace cpp14 |
| { |
| /** make_unique is missing in CPP11. Re-implement it according to the standard proposal. */ |
| |
| /**<Template for single object */ |
| template <class T> |
| struct _Unique_if |
| { |
| typedef std::unique_ptr<T> _Single_object; /**< Single object type */ |
| }; |
| |
| /** Template for array */ |
| template <class T> |
| struct _Unique_if<T[]> |
| { |
| typedef std::unique_ptr<T[]> _Unknown_bound; /**< Array type */ |
| }; |
| |
| /** Template for array with known bounds (to throw an error). |
| * |
| * @note this is intended to never be hit. |
| */ |
| template <class T, size_t N> |
| struct _Unique_if<T[N]> |
| { |
| typedef void _Known_bound; /**< Should never be used */ |
| }; |
| |
| /** Construct a single object and return a unique pointer to it. |
| * |
| * @param[in] args Constructor arguments. |
| * |
| * @return a unique pointer to the new object. |
| */ |
| template <class T, class... Args> |
| typename _Unique_if<T>::_Single_object |
| make_unique(Args &&... args) |
| { |
| return std::unique_ptr<T>(new T(std::forward<Args>(args)...)); |
| } |
| |
| /** Construct an array of objects and return a unique pointer to it. |
| * |
| * @param[in] n Array size |
| * |
| * @return a unique pointer to the new array. |
| */ |
| template <class T> |
| typename _Unique_if<T>::_Unknown_bound |
| make_unique(size_t n) |
| { |
| typedef typename std::remove_extent<T>::type U; |
| return std::unique_ptr<T>(new U[n]()); |
| } |
| |
| /** It is invalid to attempt to make_unique an array with known bounds. */ |
| template <class T, class... Args> |
| typename _Unique_if<T>::_Known_bound |
| make_unique(Args &&...) = delete; |
| } // namespace cpp14 |
| } // namespace support |
| } // namespace arm_compute |
| #endif /* ARM_COMPUTE_SUPPORT_MEMORYSUPPORT */ |