| /* |
| * Copyright (c) 2022 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_MISC_ITERABLE_H |
| #define ARM_COMPUTE_MISC_ITERABLE_H |
| namespace arm_compute |
| { |
| namespace utils |
| { |
| namespace memory |
| { |
| namespace |
| { |
| /** Default polymorphic deep copy function, used by deep_unique_ptr |
| * |
| * @param ptr Potentially polymorphic object to be deep copied |
| * @return template <typename Base, typename Derived>* |
| */ |
| template <typename Base, typename Derived> |
| Base *default_polymorphic_copy(const Base *ptr) |
| { |
| static_assert(std::is_base_of<Base, Derived>::value, |
| "Derived is not a specialization of Base"); |
| if(ptr == nullptr) |
| { |
| return nullptr; |
| } |
| return new Derived(*static_cast<const Derived *>(ptr)); |
| } |
| } // namespace |
| |
| /** A deep-copying unique pointer that also supports polymorphic cloning behavior |
| * |
| * @note The == operator compares the dereferenced value instead of the pointer itself. |
| * |
| * @tparam Base Base type |
| */ |
| template <typename Base> |
| class deep_unique_ptr |
| { |
| public: |
| using CopyFunc = std::function<Base *(const Base *)>; |
| |
| deep_unique_ptr(std::nullptr_t val = nullptr) noexcept |
| : _val{ val }, |
| _copy{} |
| { |
| } |
| template <typename Derived, typename CopyFuncDerived> |
| deep_unique_ptr(Derived *value, const CopyFuncDerived ©) noexcept |
| : _val{ value }, |
| _copy{ std::move(copy) } |
| { |
| static_assert(std::is_base_of<Base, Derived>::value, |
| "Derived is not a specialization of Base"); |
| static_assert( |
| std::is_constructible<CopyFunc, CopyFuncDerived>::value, |
| "CopyFuncDerived is not valid for a copy functor"); |
| } |
| |
| deep_unique_ptr(const deep_unique_ptr<Base> &ptr) |
| : deep_unique_ptr(ptr.clone()) |
| { |
| } |
| deep_unique_ptr &operator=(const deep_unique_ptr<Base> &ptr) |
| { |
| deep_unique_ptr<Base> tmp(ptr); |
| swap(*this, tmp); |
| return *this; |
| } |
| |
| deep_unique_ptr(deep_unique_ptr<Base> &&ptr) = default; |
| deep_unique_ptr &operator=(deep_unique_ptr<Base> &&ptr) = default; |
| ~deep_unique_ptr() = default; |
| friend void swap(deep_unique_ptr &ptr0, deep_unique_ptr<Base> &ptr1) noexcept |
| { |
| using std::swap; |
| swap(ptr0._val, ptr1._val); |
| swap(ptr0._copy, ptr1._copy); |
| } |
| Base &operator*() noexcept |
| { |
| return *_val; |
| } |
| |
| const Base &operator*() const noexcept |
| { |
| return *_val; |
| } |
| |
| Base *operator->() noexcept |
| { |
| return _val.operator->(); |
| } |
| |
| const Base *operator->() const noexcept |
| { |
| return _val.operator->(); |
| } |
| |
| Base *get() noexcept |
| { |
| return _val.get(); |
| } |
| const Base *get() const noexcept |
| { |
| return _val.get(); |
| } |
| |
| explicit operator bool() const noexcept |
| { |
| return static_cast<bool>(_val); |
| } |
| |
| bool operator==(const deep_unique_ptr<Base> &rhs) const |
| { |
| if(rhs.get() == nullptr && _val == nullptr) |
| { |
| return true; |
| } |
| else if(rhs.get() == nullptr || _val == nullptr) |
| { |
| return false; |
| } |
| else |
| { |
| return (*_val == *rhs); |
| } |
| } |
| |
| private: |
| deep_unique_ptr clone() const |
| { |
| return { _copy(_val.get()), CopyFunc(_copy) }; |
| } |
| std::unique_ptr<Base> _val{ nullptr }; |
| CopyFunc _copy{}; |
| }; |
| |
| /** Utility function to create a polymorphic deep-copying unique pointer |
| * |
| * @tparam Base |
| * @tparam Derived |
| * @tparam CopyFunc |
| * @param temp |
| * @param copy |
| * @return deep_unique_ptr<Base> |
| */ |
| template <typename Base, typename Derived, typename CopyFunc> |
| deep_unique_ptr<Base> make_deep_unique(Derived &&temp, CopyFunc copy) |
| { |
| return |
| { |
| new Derived(std::move(temp)), |
| CopyFunc{ std::move(copy) } |
| }; |
| } |
| |
| template <typename Base, typename Derived> |
| deep_unique_ptr<Base> make_deep_unique(Derived &&temp) |
| { |
| static_assert(std::is_base_of<Base, Derived>::value, |
| "Derived is not a specialization of Base"); |
| |
| return make_deep_unique<Base, Derived>( |
| std::move(temp), default_polymorphic_copy<Base, Derived>); |
| } |
| |
| template <typename Base, typename Derived, typename... Args> |
| deep_unique_ptr<Base> make_deep_unique(Args &&... args) |
| { |
| static_assert(std::is_constructible<Derived, Args...>::value, |
| "Cannot instantiate Derived from arguments"); |
| |
| return make_deep_unique<Base, Derived>( |
| std::move(Derived{ std::forward<Args>(args)... })); |
| } |
| |
| } // namespace memory |
| } // namespace utils |
| } // namespace arm_compute |
| #endif // ARM_COMPUTE_MISC_ITERABLE_H |