| // -*- C++ -*- |
| //===-------------------------- memory ------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP_MEMORY |
| #define _LIBCPP_MEMORY |
| |
| /* |
| memory synopsis |
| |
| namespace std |
| { |
| |
| struct allocator_arg_t { }; |
| inline constexpr allocator_arg_t allocator_arg = allocator_arg_t(); |
| |
| template <class T, class Alloc> struct uses_allocator; |
| |
| template <class Ptr> |
| struct pointer_traits |
| { |
| typedef Ptr pointer; |
| typedef <details> element_type; |
| typedef <details> difference_type; |
| |
| template <class U> using rebind = <details>; |
| |
| static pointer pointer_to(<details>); |
| }; |
| |
| template <class T> |
| struct pointer_traits<T*> |
| { |
| typedef T* pointer; |
| typedef T element_type; |
| typedef ptrdiff_t difference_type; |
| |
| template <class U> using rebind = U*; |
| |
| static pointer pointer_to(<details>) noexcept; // constexpr in C++20 |
| }; |
| |
| template <class T> constexpr T* to_address(T* p) noexcept; // C++20 |
| template <class Ptr> constexpr auto to_address(const Ptr& p) noexcept; // C++20 |
| |
| template <class Alloc> |
| struct allocator_traits |
| { |
| typedef Alloc allocator_type; |
| typedef typename allocator_type::value_type |
| value_type; |
| |
| typedef Alloc::pointer | value_type* pointer; |
| typedef Alloc::const_pointer |
| | pointer_traits<pointer>::rebind<const value_type> |
| const_pointer; |
| typedef Alloc::void_pointer |
| | pointer_traits<pointer>::rebind<void> |
| void_pointer; |
| typedef Alloc::const_void_pointer |
| | pointer_traits<pointer>::rebind<const void> |
| const_void_pointer; |
| typedef Alloc::difference_type |
| | pointer_traits<pointer>::difference_type |
| difference_type; |
| typedef Alloc::size_type |
| | make_unsigned<difference_type>::type |
| size_type; |
| typedef Alloc::propagate_on_container_copy_assignment |
| | false_type propagate_on_container_copy_assignment; |
| typedef Alloc::propagate_on_container_move_assignment |
| | false_type propagate_on_container_move_assignment; |
| typedef Alloc::propagate_on_container_swap |
| | false_type propagate_on_container_swap; |
| typedef Alloc::is_always_equal |
| | is_empty is_always_equal; |
| |
| template <class T> using rebind_alloc = Alloc::rebind<T>::other | Alloc<T, Args...>; |
| template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>; |
| |
| static pointer allocate(allocator_type& a, size_type n); // constexpr and [[nodiscard]] in C++20 |
| static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // constexpr and [[nodiscard]] in C++20 |
| |
| static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; // constexpr in C++20 |
| |
| template <class T, class... Args> |
| static void construct(allocator_type& a, T* p, Args&&... args); // constexpr in C++20 |
| |
| template <class T> |
| static void destroy(allocator_type& a, T* p); // constexpr in C++20 |
| |
| static size_type max_size(const allocator_type& a); // noexcept in C++14, constexpr in C++20 |
| static allocator_type select_on_container_copy_construction(const allocator_type& a); // constexpr in C++20 |
| }; |
| |
| template <> |
| class allocator<void> // removed in C++20 |
| { |
| public: |
| typedef void* pointer; |
| typedef const void* const_pointer; |
| typedef void value_type; |
| |
| template <class _Up> struct rebind {typedef allocator<_Up> other;}; |
| }; |
| |
| template <class T> |
| class allocator |
| { |
| public: |
| typedef size_t size_type; |
| typedef ptrdiff_t difference_type; |
| typedef T* pointer; // deprecated in C++17, removed in C++20 |
| typedef const T* const_pointer; // deprecated in C++17, removed in C++20 |
| typedef typename add_lvalue_reference<T>::type |
| reference; // deprecated in C++17, removed in C++20 |
| typedef typename add_lvalue_reference<const T>::type |
| const_reference; // deprecated in C++17, removed in C++20 |
| |
| typedef T value_type; |
| |
| template <class U> struct rebind {typedef allocator<U> other;}; // deprecated in C++17, removed in C++20 |
| |
| typedef true_type propagate_on_container_move_assignment; |
| typedef true_type is_always_equal; |
| |
| constexpr allocator() noexcept; // constexpr in C++20 |
| constexpr allocator(const allocator&) noexcept; // constexpr in C++20 |
| template <class U> |
| constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20 |
| ~allocator(); // constexpr in C++20 |
| pointer address(reference x) const noexcept; // deprecated in C++17, removed in C++20 |
| const_pointer address(const_reference x) const noexcept; // deprecated in C++17, removed in C++20 |
| T* allocate(size_t n, const void* hint); // deprecated in C++17, removed in C++20 |
| T* allocate(size_t n); // constexpr in C++20 |
| void deallocate(T* p, size_t n) noexcept; // constexpr in C++20 |
| size_type max_size() const noexcept; // deprecated in C++17, removed in C++20 |
| template<class U, class... Args> |
| void construct(U* p, Args&&... args); // deprecated in C++17, removed in C++20 |
| template <class U> |
| void destroy(U* p); // deprecated in C++17, removed in C++20 |
| }; |
| |
| template <class T, class U> |
| bool operator==(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20 |
| |
| template <class T, class U> |
| bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20 |
| |
| template <class OutputIterator, class T> |
| class raw_storage_iterator // deprecated in C++17, removed in C++20 |
| : public iterator<output_iterator_tag, void, void, void, void> // until C++17 |
| { |
| public: |
| typedef output_iterator_tag iterator_category; |
| typedef void value_type; |
| typedef void difference_type; // until C++20 |
| typedef ptrdiff_t difference_type; // since C++20 |
| typedef void pointer; |
| typedef void reference; |
| |
| explicit raw_storage_iterator(OutputIterator x); |
| raw_storage_iterator& operator*(); |
| raw_storage_iterator& operator=(const T& element); |
| raw_storage_iterator& operator++(); |
| raw_storage_iterator operator++(int); |
| }; |
| |
| template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept; |
| template <class T> void return_temporary_buffer(T* p) noexcept; |
| |
| template <class T> T* addressof(T& r) noexcept; |
| template <class T> T* addressof(const T&& r) noexcept = delete; |
| |
| template <class InputIterator, class ForwardIterator> |
| ForwardIterator |
| uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result); |
| |
| template <class InputIterator, class Size, class ForwardIterator> |
| ForwardIterator |
| uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); |
| |
| template <class ForwardIterator, class T> |
| void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); |
| |
| template <class ForwardIterator, class Size, class T> |
| ForwardIterator |
| uninitialized_fill_n(ForwardIterator first, Size n, const T& x); |
| |
| template <class T, class ...Args> |
| constexpr T* construct_at(T* location, Args&& ...args); // since C++20 |
| |
| template <class T> |
| void destroy_at(T* location); // constexpr in C++20 |
| |
| template <class ForwardIterator> |
| void destroy(ForwardIterator first, ForwardIterator last); // constexpr in C++20 |
| |
| template <class ForwardIterator, class Size> |
| ForwardIterator destroy_n(ForwardIterator first, Size n); // constexpr in C++20 |
| |
| template <class InputIterator, class ForwardIterator> |
| ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result); |
| |
| template <class InputIterator, class Size, class ForwardIterator> |
| pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result); |
| |
| template <class ForwardIterator> |
| void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); |
| |
| template <class ForwardIterator, class Size> |
| ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); |
| |
| template <class ForwardIterator> |
| void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); |
| |
| template <class ForwardIterator, class Size> |
| ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); |
| |
| template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17 |
| |
| template<class X> |
| class auto_ptr // deprecated in C++11, removed in C++17 |
| { |
| public: |
| typedef X element_type; |
| |
| explicit auto_ptr(X* p =0) throw(); |
| auto_ptr(auto_ptr&) throw(); |
| template<class Y> auto_ptr(auto_ptr<Y>&) throw(); |
| auto_ptr& operator=(auto_ptr&) throw(); |
| template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw(); |
| auto_ptr& operator=(auto_ptr_ref<X> r) throw(); |
| ~auto_ptr() throw(); |
| |
| typename add_lvalue_reference<X>::type operator*() const throw(); |
| X* operator->() const throw(); |
| X* get() const throw(); |
| X* release() throw(); |
| void reset(X* p =0) throw(); |
| |
| auto_ptr(auto_ptr_ref<X>) throw(); |
| template<class Y> operator auto_ptr_ref<Y>() throw(); |
| template<class Y> operator auto_ptr<Y>() throw(); |
| }; |
| |
| template <class T> |
| struct default_delete |
| { |
| constexpr default_delete() noexcept = default; |
| template <class U> default_delete(const default_delete<U>&) noexcept; |
| |
| void operator()(T*) const noexcept; |
| }; |
| |
| template <class T> |
| struct default_delete<T[]> |
| { |
| constexpr default_delete() noexcept = default; |
| void operator()(T*) const noexcept; |
| template <class U> void operator()(U*) const = delete; |
| }; |
| |
| template <class T, class D = default_delete<T>> |
| class unique_ptr |
| { |
| public: |
| typedef see below pointer; |
| typedef T element_type; |
| typedef D deleter_type; |
| |
| // constructors |
| constexpr unique_ptr() noexcept; |
| explicit unique_ptr(pointer p) noexcept; |
| unique_ptr(pointer p, see below d1) noexcept; |
| unique_ptr(pointer p, see below d2) noexcept; |
| unique_ptr(unique_ptr&& u) noexcept; |
| unique_ptr(nullptr_t) noexcept : unique_ptr() { } |
| template <class U, class E> |
| unique_ptr(unique_ptr<U, E>&& u) noexcept; |
| template <class U> |
| unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17 |
| |
| // destructor |
| ~unique_ptr(); |
| |
| // assignment |
| unique_ptr& operator=(unique_ptr&& u) noexcept; |
| template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; |
| unique_ptr& operator=(nullptr_t) noexcept; |
| |
| // observers |
| typename add_lvalue_reference<T>::type operator*() const; |
| pointer operator->() const noexcept; |
| pointer get() const noexcept; |
| deleter_type& get_deleter() noexcept; |
| const deleter_type& get_deleter() const noexcept; |
| explicit operator bool() const noexcept; |
| |
| // modifiers |
| pointer release() noexcept; |
| void reset(pointer p = pointer()) noexcept; |
| void swap(unique_ptr& u) noexcept; |
| }; |
| |
| template <class T, class D> |
| class unique_ptr<T[], D> |
| { |
| public: |
| typedef implementation-defined pointer; |
| typedef T element_type; |
| typedef D deleter_type; |
| |
| // constructors |
| constexpr unique_ptr() noexcept; |
| explicit unique_ptr(pointer p) noexcept; |
| unique_ptr(pointer p, see below d) noexcept; |
| unique_ptr(pointer p, see below d) noexcept; |
| unique_ptr(unique_ptr&& u) noexcept; |
| unique_ptr(nullptr_t) noexcept : unique_ptr() { } |
| |
| // destructor |
| ~unique_ptr(); |
| |
| // assignment |
| unique_ptr& operator=(unique_ptr&& u) noexcept; |
| unique_ptr& operator=(nullptr_t) noexcept; |
| |
| // observers |
| T& operator[](size_t i) const; |
| pointer get() const noexcept; |
| deleter_type& get_deleter() noexcept; |
| const deleter_type& get_deleter() const noexcept; |
| explicit operator bool() const noexcept; |
| |
| // modifiers |
| pointer release() noexcept; |
| void reset(pointer p = pointer()) noexcept; |
| void reset(nullptr_t) noexcept; |
| template <class U> void reset(U) = delete; |
| void swap(unique_ptr& u) noexcept; |
| }; |
| |
| template <class T, class D> |
| void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; |
| |
| template <class T1, class D1, class T2, class D2> |
| bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); |
| template <class T1, class D1, class T2, class D2> |
| bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); |
| template <class T1, class D1, class T2, class D2> |
| bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); |
| template <class T1, class D1, class T2, class D2> |
| bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); |
| template <class T1, class D1, class T2, class D2> |
| bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); |
| template <class T1, class D1, class T2, class D2> |
| bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); |
| |
| template <class T, class D> |
| bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; |
| template <class T, class D> |
| bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; |
| template <class T, class D> |
| bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; |
| template <class T, class D> |
| bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; |
| |
| template <class T, class D> |
| bool operator<(const unique_ptr<T, D>& x, nullptr_t); |
| template <class T, class D> |
| bool operator<(nullptr_t, const unique_ptr<T, D>& y); |
| template <class T, class D> |
| bool operator<=(const unique_ptr<T, D>& x, nullptr_t); |
| template <class T, class D> |
| bool operator<=(nullptr_t, const unique_ptr<T, D>& y); |
| template <class T, class D> |
| bool operator>(const unique_ptr<T, D>& x, nullptr_t); |
| template <class T, class D> |
| bool operator>(nullptr_t, const unique_ptr<T, D>& y); |
| template <class T, class D> |
| bool operator>=(const unique_ptr<T, D>& x, nullptr_t); |
| template <class T, class D> |
| bool operator>=(nullptr_t, const unique_ptr<T, D>& y); |
| |
| class bad_weak_ptr |
| : public std::exception |
| { |
| bad_weak_ptr() noexcept; |
| }; |
| |
| template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14 |
| template<class T> unique_ptr<T> make_unique(size_t n); // C++14 |
| template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N] |
| |
| template<class E, class T, class Y, class D> |
| basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p); |
| |
| template<class T> |
| class shared_ptr |
| { |
| public: |
| typedef T element_type; |
| typedef weak_ptr<T> weak_type; // C++17 |
| |
| // constructors: |
| constexpr shared_ptr() noexcept; |
| template<class Y> explicit shared_ptr(Y* p); |
| template<class Y, class D> shared_ptr(Y* p, D d); |
| template<class Y, class D, class A> shared_ptr(Y* p, D d, A a); |
| template <class D> shared_ptr(nullptr_t p, D d); |
| template <class D, class A> shared_ptr(nullptr_t p, D d, A a); |
| template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept; |
| shared_ptr(const shared_ptr& r) noexcept; |
| template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept; |
| shared_ptr(shared_ptr&& r) noexcept; |
| template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept; |
| template<class Y> explicit shared_ptr(const weak_ptr<Y>& r); |
| template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17 |
| template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r); |
| shared_ptr(nullptr_t) : shared_ptr() { } |
| |
| // destructor: |
| ~shared_ptr(); |
| |
| // assignment: |
| shared_ptr& operator=(const shared_ptr& r) noexcept; |
| template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept; |
| shared_ptr& operator=(shared_ptr&& r) noexcept; |
| template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r); |
| template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17 |
| template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r); |
| |
| // modifiers: |
| void swap(shared_ptr& r) noexcept; |
| void reset() noexcept; |
| template<class Y> void reset(Y* p); |
| template<class Y, class D> void reset(Y* p, D d); |
| template<class Y, class D, class A> void reset(Y* p, D d, A a); |
| |
| // observers: |
| T* get() const noexcept; |
| T& operator*() const noexcept; |
| T* operator->() const noexcept; |
| long use_count() const noexcept; |
| bool unique() const noexcept; |
| explicit operator bool() const noexcept; |
| template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; |
| template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; |
| }; |
| |
| template<class T> |
| shared_ptr(weak_ptr<T>) -> shared_ptr<T>; |
| template<class T, class D> |
| shared_ptr(unique_ptr<T, D>) -> shared_ptr<T>; |
| |
| // shared_ptr comparisons: |
| template<class T, class U> |
| bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; |
| template<class T, class U> |
| bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; |
| template<class T, class U> |
| bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; |
| template<class T, class U> |
| bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; |
| template<class T, class U> |
| bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; |
| template<class T, class U> |
| bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; |
| |
| template <class T> |
| bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept; |
| template <class T> |
| bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept; |
| template <class T> |
| bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept; |
| template <class T> |
| bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept; |
| template <class T> |
| bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept; |
| template <class T> |
| bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; |
| template <class T> |
| bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; |
| template <class T> |
| bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; |
| template <class T> |
| bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; |
| template <class T> |
| bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; |
| template <class T> |
| bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; |
| template <class T> |
| bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; |
| |
| // shared_ptr specialized algorithms: |
| template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept; |
| |
| // shared_ptr casts: |
| template<class T, class U> |
| shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept; |
| template<class T, class U> |
| shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept; |
| template<class T, class U> |
| shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept; |
| |
| // shared_ptr I/O: |
| template<class E, class T, class Y> |
| basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p); |
| |
| // shared_ptr get_deleter: |
| template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept; |
| |
| template<class T, class... Args> |
| shared_ptr<T> make_shared(Args&&... args); |
| template<class T, class A, class... Args> |
| shared_ptr<T> allocate_shared(const A& a, Args&&... args); |
| |
| template<class T> |
| class weak_ptr |
| { |
| public: |
| typedef T element_type; |
| |
| // constructors |
| constexpr weak_ptr() noexcept; |
| template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept; |
| weak_ptr(weak_ptr const& r) noexcept; |
| template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept; |
| weak_ptr(weak_ptr&& r) noexcept; // C++14 |
| template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14 |
| |
| // destructor |
| ~weak_ptr(); |
| |
| // assignment |
| weak_ptr& operator=(weak_ptr const& r) noexcept; |
| template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept; |
| template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept; |
| weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14 |
| template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14 |
| |
| // modifiers |
| void swap(weak_ptr& r) noexcept; |
| void reset() noexcept; |
| |
| // observers |
| long use_count() const noexcept; |
| bool expired() const noexcept; |
| shared_ptr<T> lock() const noexcept; |
| template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; |
| template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; |
| }; |
| |
| template<class T> |
| weak_ptr(shared_ptr<T>) -> weak_ptr<T>; |
| |
| // weak_ptr specialized algorithms: |
| template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept; |
| |
| // class owner_less: |
| template<class T> struct owner_less; |
| |
| template<class T> |
| struct owner_less<shared_ptr<T> > |
| : binary_function<shared_ptr<T>, shared_ptr<T>, bool> |
| { |
| typedef bool result_type; |
| bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept; |
| bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; |
| bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; |
| }; |
| |
| template<class T> |
| struct owner_less<weak_ptr<T> > |
| : binary_function<weak_ptr<T>, weak_ptr<T>, bool> |
| { |
| typedef bool result_type; |
| bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept; |
| bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; |
| bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; |
| }; |
| |
| template <> // Added in C++14 |
| struct owner_less<void> |
| { |
| template <class _Tp, class _Up> |
| bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; |
| template <class _Tp, class _Up> |
| bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; |
| template <class _Tp, class _Up> |
| bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; |
| template <class _Tp, class _Up> |
| bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; |
| |
| typedef void is_transparent; |
| }; |
| |
| template<class T> |
| class enable_shared_from_this |
| { |
| protected: |
| constexpr enable_shared_from_this() noexcept; |
| enable_shared_from_this(enable_shared_from_this const&) noexcept; |
| enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept; |
| ~enable_shared_from_this(); |
| public: |
| shared_ptr<T> shared_from_this(); |
| shared_ptr<T const> shared_from_this() const; |
| }; |
| |
| template<class T> |
| bool atomic_is_lock_free(const shared_ptr<T>* p); |
| template<class T> |
| shared_ptr<T> atomic_load(const shared_ptr<T>* p); |
| template<class T> |
| shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo); |
| template<class T> |
| void atomic_store(shared_ptr<T>* p, shared_ptr<T> r); |
| template<class T> |
| void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); |
| template<class T> |
| shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r); |
| template<class T> |
| shared_ptr<T> |
| atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); |
| template<class T> |
| bool |
| atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); |
| template<class T> |
| bool |
| atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); |
| template<class T> |
| bool |
| atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v, |
| shared_ptr<T> w, memory_order success, |
| memory_order failure); |
| template<class T> |
| bool |
| atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, |
| shared_ptr<T> w, memory_order success, |
| memory_order failure); |
| // Hash support |
| template <class T> struct hash; |
| template <class T, class D> struct hash<unique_ptr<T, D> >; |
| template <class T> struct hash<shared_ptr<T> >; |
| |
| template <class T, class Alloc> |
| inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value; |
| |
| // Pointer safety |
| enum class pointer_safety { relaxed, preferred, strict }; // since C++11 |
| void declare_reachable(void *p); // since C++11 |
| template <class T> T *undeclare_reachable(T *p); // since C++11 |
| void declare_no_pointers(char *p, size_t n); // since C++11 |
| void undeclare_no_pointers(char *p, size_t n); // since C++11 |
| pointer_safety get_pointer_safety() noexcept; // since C++11 |
| |
| void* align(size_t alignment, size_t size, void*& ptr, size_t& space); |
| |
| } // std |
| |
| */ |
| |
| #include <__config> |
| #include <__functional_base> |
| #include <__memory/addressof.h> |
| #include <__memory/allocation_guard.h> |
| #include <__memory/allocator.h> |
| #include <__memory/allocator_arg_t.h> |
| #include <__memory/allocator_traits.h> |
| #include <__memory/compressed_pair.h> |
| #include <__memory/construct_at.h> |
| #include <__memory/pointer_safety.h> |
| #include <__memory/pointer_traits.h> |
| #include <__memory/raw_storage_iterator.h> |
| #include <__memory/shared_ptr.h> |
| #include <__memory/temporary_buffer.h> |
| #include <__memory/uninitialized_algorithms.h> |
| #include <__memory/unique_ptr.h> |
| #include <__memory/uses_allocator.h> |
| #include <compare> |
| #include <cstddef> |
| #include <cstdint> |
| #include <cstring> |
| #include <iosfwd> |
| #include <iterator> |
| #include <new> |
| #include <stdexcept> |
| #include <tuple> |
| #include <type_traits> |
| #include <typeinfo> |
| #include <utility> |
| #include <version> |
| |
| #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) |
| # include <__memory/auto_ptr.h> |
| #endif |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Alloc, class _Ptr> |
| _LIBCPP_INLINE_VISIBILITY |
| void __construct_forward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) { |
| static_assert(__is_cpp17_move_insertable<_Alloc>::value, |
| "The specified type does not meet the requirements of Cpp17MoveInsertable"); |
| typedef allocator_traits<_Alloc> _Traits; |
| for (; __begin1 != __end1; ++__begin1, (void)++__begin2) { |
| _Traits::construct(__a, _VSTD::__to_address(__begin2), |
| #ifdef _LIBCPP_NO_EXCEPTIONS |
| _VSTD::move(*__begin1) |
| #else |
| _VSTD::move_if_noexcept(*__begin1) |
| #endif |
| ); |
| } |
| } |
| |
| template <class _Alloc, class _Tp, typename enable_if< |
| (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) && |
| is_trivially_move_constructible<_Tp>::value |
| >::type> |
| _LIBCPP_INLINE_VISIBILITY |
| void __construct_forward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) { |
| ptrdiff_t _Np = __end1 - __begin1; |
| if (_Np > 0) { |
| _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); |
| __begin2 += _Np; |
| } |
| } |
| |
| template <class _Alloc, class _Iter, class _Ptr> |
| _LIBCPP_INLINE_VISIBILITY |
| void __construct_range_forward(_Alloc& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) { |
| typedef allocator_traits<_Alloc> _Traits; |
| for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) { |
| _Traits::construct(__a, _VSTD::__to_address(__begin2), *__begin1); |
| } |
| } |
| |
| template <class _Alloc, class _Source, class _Dest, |
| class _RawSource = typename remove_const<_Source>::type, |
| class _RawDest = typename remove_const<_Dest>::type, |
| class = |
| typename enable_if< |
| is_trivially_copy_constructible<_Dest>::value && |
| is_same<_RawSource, _RawDest>::value && |
| (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Dest*, _Source&>::value) |
| >::type> |
| _LIBCPP_INLINE_VISIBILITY |
| void __construct_range_forward(_Alloc&, _Source* __begin1, _Source* __end1, _Dest*& __begin2) { |
| ptrdiff_t _Np = __end1 - __begin1; |
| if (_Np > 0) { |
| _VSTD::memcpy(const_cast<_RawDest*>(__begin2), __begin1, _Np * sizeof(_Dest)); |
| __begin2 += _Np; |
| } |
| } |
| |
| template <class _Alloc, class _Ptr> |
| _LIBCPP_INLINE_VISIBILITY |
| void __construct_backward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) { |
| static_assert(__is_cpp17_move_insertable<_Alloc>::value, |
| "The specified type does not meet the requirements of Cpp17MoveInsertable"); |
| typedef allocator_traits<_Alloc> _Traits; |
| while (__end1 != __begin1) { |
| _Traits::construct(__a, _VSTD::__to_address(__end2 - 1), |
| #ifdef _LIBCPP_NO_EXCEPTIONS |
| _VSTD::move(*--__end1) |
| #else |
| _VSTD::move_if_noexcept(*--__end1) |
| #endif |
| ); |
| --__end2; |
| } |
| } |
| |
| template <class _Alloc, class _Tp, class = typename enable_if< |
| (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) && |
| is_trivially_move_constructible<_Tp>::value |
| >::type> |
| _LIBCPP_INLINE_VISIBILITY |
| void __construct_backward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) { |
| ptrdiff_t _Np = __end1 - __begin1; |
| __end2 -= _Np; |
| if (_Np > 0) |
| _VSTD::memcpy(static_cast<void*>(__end2), static_cast<void const*>(__begin1), _Np * sizeof(_Tp)); |
| } |
| |
| struct __destruct_n |
| { |
| private: |
| size_t __size_; |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT |
| {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT |
| {} |
| |
| _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT |
| {++__size_;} |
| _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT |
| {} |
| |
| _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT |
| {__size_ = __s;} |
| _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT |
| {} |
| public: |
| _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT |
| : __size_(__s) {} |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VISIBILITY void __incr() _NOEXCEPT |
| {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT |
| {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT |
| {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} |
| }; |
| |
| _LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); |
| |
| // --- Helper for container swap -- |
| template <typename _Alloc> |
| _LIBCPP_INLINE_VISIBILITY |
| void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) |
| #if _LIBCPP_STD_VER >= 14 |
| _NOEXCEPT |
| #else |
| _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) |
| #endif |
| { |
| using _VSTD::swap; |
| swap(__a1, __a2); |
| } |
| |
| template <typename _Alloc> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} |
| |
| template <typename _Alloc> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void __swap_allocator(_Alloc & __a1, _Alloc & __a2) |
| #if _LIBCPP_STD_VER >= 14 |
| _NOEXCEPT |
| #else |
| _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) |
| #endif |
| { |
| _VSTD::__swap_allocator(__a1, __a2, |
| integral_constant<bool, allocator_traits<_Alloc>::propagate_on_container_swap::value>()); |
| } |
| |
| template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > |
| struct __noexcept_move_assign_container : public integral_constant<bool, |
| _Traits::propagate_on_container_move_assignment::value |
| #if _LIBCPP_STD_VER > 14 |
| || _Traits::is_always_equal::value |
| #else |
| && is_nothrow_move_assignable<_Alloc>::value |
| #endif |
| > {}; |
| |
| |
| template <class _Tp, class _Alloc> |
| struct __temp_value { |
| typedef allocator_traits<_Alloc> _Traits; |
| |
| typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; |
| _Alloc &__a; |
| |
| _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } |
| _Tp & get() { return *__addr(); } |
| |
| template<class... _Args> |
| _LIBCPP_NO_CFI |
| __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { |
| _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), |
| _VSTD::forward<_Args>(__args)...); |
| } |
| |
| ~__temp_value() { _Traits::destroy(__a, __addr()); } |
| }; |
| |
| template<typename _Alloc, typename = void, typename = void> |
| struct __is_allocator : false_type {}; |
| |
| template<typename _Alloc> |
| struct __is_allocator<_Alloc, |
| typename __void_t<typename _Alloc::value_type>::type, |
| typename __void_t<decltype(declval<_Alloc&>().allocate(size_t(0)))>::type |
| > |
| : true_type {}; |
| |
| // __builtin_new_allocator -- A non-templated helper for allocating and |
| // deallocating memory using __builtin_operator_new and |
| // __builtin_operator_delete. It should be used in preference to |
| // `std::allocator<T>` to avoid additional instantiations. |
| struct __builtin_new_allocator { |
| struct __builtin_new_deleter { |
| typedef void* pointer_type; |
| |
| _LIBCPP_CONSTEXPR explicit __builtin_new_deleter(size_t __size, size_t __align) |
| : __size_(__size), __align_(__align) {} |
| |
| void operator()(void* p) const _NOEXCEPT { |
| _VSTD::__libcpp_deallocate(p, __size_, __align_); |
| } |
| |
| private: |
| size_t __size_; |
| size_t __align_; |
| }; |
| |
| typedef unique_ptr<void, __builtin_new_deleter> __holder_t; |
| |
| static __holder_t __allocate_bytes(size_t __s, size_t __align) { |
| return __holder_t(_VSTD::__libcpp_allocate(__s, __align), |
| __builtin_new_deleter(__s, __align)); |
| } |
| |
| static void __deallocate_bytes(void* __p, size_t __s, |
| size_t __align) _NOEXCEPT { |
| _VSTD::__libcpp_deallocate(__p, __s, __align); |
| } |
| |
| template <class _Tp> |
| _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE |
| static __holder_t __allocate_type(size_t __n) { |
| return __allocate_bytes(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); |
| } |
| |
| template <class _Tp> |
| _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE |
| static void __deallocate_type(void* __p, size_t __n) _NOEXCEPT { |
| __deallocate_bytes(__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); |
| } |
| }; |
| |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 |
| # include <__pstl_memory> |
| #endif |
| |
| #endif // _LIBCPP_MEMORY |