標準ライブラリヘッダ <memory>

提供: cppreference.com

このヘッダは動的メモリ管理ライブラリの一部です。

std::atomic_is_lock_free(std::shared_ptr)std::atomic_load(std::shared_ptr)std::atomic_load_explicit(std::shared_ptr)std::atomic_store(std::shared_ptr)std::atomic_store_explicit(std::shared_ptr)std::atomic_exchange(std::shared_ptr)std::atomic_exchange_explicit(std::shared_ptr)std::atomic_compare_exchange_weak(std::shared_ptr)std::atomic_compare_exchange_strong(std::shared_ptr)std::atomic_compare_exchange_weak_explicit(std::shared_ptr)std::atomic_compare_exchange_strong_explicit(std::shared_ptr)

(C++20で非推奨)

std::shared_ptr に対するアトミック操作の特殊化
(関数テンプレート) [edit]

ニーブロイド
名前空間 `std::ranges` で定義
未初期化記憶域
uninitialized_copy (C++20)	メモリの未初期化領域に指定範囲のオブジェクトをコピーします (ニーブロイド) [edit]
uninitialized_copy_n (C++20)	メモリの未初期化領域に指定個数のオブジェクトをコピーします (ニーブロイド) [edit]
uninitialized_fill (C++20)	指定された範囲で定義されるメモリの未初期化領域にオブジェクトをコピーします (ニーブロイド) [edit]
uninitialized_fill_n (C++20)	指定された開始位置と個数で定義されるメモリの未初期化領域にオブジェクトをコピーします (ニーブロイド) [edit]
uninitialized_move (C++20)	メモリの未初期化領域に指定範囲のオブジェクトをムーブします (ニーブロイド) [edit]
uninitialized_move_n (C++20)	メモリの未初期化領域に指定個数のオブジェクトをムーブします (ニーブロイド) [edit]
uninitialized_default_construct (C++20)	指定された範囲で定義されるメモリの未初期化領域にデフォルト初期化でオブジェクトを構築します (ニーブロイド) [edit]
uninitialized_default_construct_n (C++20)	指定された開始位置と個数で定義されるメモリの未初期化領域にデフォルト初期化でオブジェクトを構築します (ニーブロイド) [edit]
uninitialized_value_construct (C++20)	指定された範囲で定義されるメモリの未初期化領域に値初期化でオブジェクトを構築します (ニーブロイド) [edit]
uninitialized_value_construct_n (C++20)	指定された開始位置と個数で定義されるメモリの未初期化領域に値初期化でオブジェクトを構築します (ニーブロイド) [edit]
destroy_at (C++20)	指定アドレスのオブジェクトを破棄します (ニーブロイド) [edit]
destroy (C++20)	指定範囲のオブジェクトを破棄します (ニーブロイド) [edit]
destroy_n (C++20)	指定個数のオブジェクトを破棄します (ニーブロイド) [edit]

[編集] 概要

namespace std {
  // pointer traits
  template<class Ptr> struct pointer_traits;
  template<class T> struct pointer_traits<T*>;
 
  // pointer conversion
  template<class T>
    constexpr T* to_address(T* p) noexcept;
  template<class Ptr>
    auto to_address(const Ptr& p) noexcept;
 
  // pointer safety
  enum class pointer_safety { relaxed, preferred, strict };
  void declare_reachable(void* p);
  template<class T>
    T* undeclare_reachable(T* p);
  void declare_no_pointers(char* p, size_t n);
  void undeclare_no_pointers(char* p, size_t n);
  pointer_safety get_pointer_safety() noexcept;
 
  // pointer alignment
  void* align(size_t alignment, size_t size, void*& ptr, size_t& space);
  template<size_t N, class T>
    [[nodiscard]] constexpr T* assume_aligned(T* ptr);
 
  // allocator argument tag
  struct allocator_arg_t { explicit allocator_arg_t() = default; };
  inline constexpr allocator_arg_t allocator_arg{};
 
  // uses_allocator
  template<class T, class Alloc> struct uses_allocator;
 
  // uses_allocator
  template<class T, class Alloc>
    inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value;
 
  // uses-allocator construction
  template<class T, class Alloc, class... Args>
    constexpr auto uses_allocator_construction_args(const Alloc& alloc, Args&&... args)
      noexcept -> /* see definition */;
  template<class T, class Alloc, class Tuple1, class Tuple2>
    constexpr auto uses_allocator_construction_args(
      const Alloc& alloc, piecewise_construct_t, Tuple1&& x, Tuple2&& y)
      noexcept -> /* see definition */;
  template<class T, class Alloc>
    constexpr auto uses_allocator_construction_args(const Alloc& alloc)
      noexcept -> /* see definition */;
  template<class T, class Alloc, class U, class V>
    constexpr auto uses_allocator_construction_args(const Alloc& alloc, U&& u, V&& v)
      noexcept -> /* see definition */;
  template<class T, class Alloc, class U, class V>
    constexpr auto uses_allocator_construction_args(const Alloc& alloc,
      const pair<U,V>& pr)
      noexcept -> /* see definition */;
  template<class T, class Alloc, class U, class V>
    constexpr auto uses_allocator_construction_args(const Alloc& alloc, pair<U,V>&& pr)
      noexcept -> /* see definition */;
  template<class T, class Alloc, class... Args>
    constexpr T make_obj_using_allocator(const Alloc& alloc, Args&&... args);
  template<class T, class Alloc, class... Args>
    T* uninitialized_construct_using_allocator(T* p, const Alloc& alloc, Args&&... args);
 
  // allocator traits
  template<class Alloc> struct allocator_traits;
 
  // the default allocator
  template<class T> class allocator;
  template<class T, class U>
    bool operator==(const allocator<T>&, const allocator<U>&) noexcept;
  template<class T, class U>
    bool operator!=(const allocator<T>&, const allocator<U>&) noexcept;
 
  // specialized algorithms
  // special memory concepts
  template<class I>
    concept __NoThrowInputIterator = /* see definition */;   // exposition only
  template<class I>
    concept __NoThrowForwardIterator = /* see definition */; // exposition only
  template<class S, class I>
    concept __NoThrowSentinel = /* see definition */;        // exposition only
  template<class R>
    concept __NoThrowInputRange = /* see definition */;      // exposition only
  template<class R>
    concept __NoThrowForwardRange = /* see definition */;    // exposition only
 
  template<class T>
    constexpr T* addressof(T& r) noexcept;
  template<class T>
    const T* addressof(const T&&) = delete;
  template<class ForwardIt>
    void uninitialized_default_construct(ForwardIt first, ForwardIt last);
  template<class ExecutionPolicy, class ForwardIt>
    void uninitialized_default_construct(ExecutionPolicy&& exec,
                                         ForwardIt first, ForwardIt last);
  template<class ForwardIt, class Size>
    ForwardIt uninitialized_default_construct_n(ForwardIt first, Size n);
  template<class ExecutionPolicy, class ForwardIt, class Size>
    ForwardIt uninitialized_default_construct_n(ExecutionPolicy&& exec,
                                                      ForwardIt first, Size n);
 
  namespace ranges {
    template<__NoThrowForwardIterator I, __NoThrowSentinel<I> S>
      requires DefaultConstructible<iter_value_t<I>>
        I uninitialized_default_construct(I first, S last);
    template<__NoThrowForwardRange R>
      requires DefaultConstructible<iter_value_t<iterator_t<R>>>
        borrowed_iterator_t<R> uninitialized_default_construct(R&& r);
 
    template<__NoThrowForwardIterator I>
      requires DefaultConstructible<iter_value_t<I>>
        I uninitialized_default_construct_n(I first, iter_difference_t<I> n);
  }
 
  template<class ForwardIt>
    void uninitialized_value_construct(ForwardIt first, ForwardIt last);
  template<class ExecutionPolicy, class ForwardIt>
    void uninitialized_value_construct(ExecutionPolicy&& exec,
                                       ForwardIt first, ForwardIt last);
  template<class ForwardIt, class Size>
    ForwardIt uninitialized_value_construct_n(ForwardIt first, Size n);
  template<class ExecutionPolicy, class ForwardIt, class Size>
    ForwardIt uninitialized_value_construct_n(ExecutionPolicy&& exec,
                                              ForwardIt first, Size n);
 
  namespace ranges {
    template<__NoThrowForwardIterator I, __NoThrowSentinel<I> S>
      requires DefaultConstructible<iter_value_t<I>>
        I uninitialized_value_construct(I first, S last);
    template<__NoThrowForwardRange R>
      requires DefaultConstructible<iter_value_t<iterator_t<R>>>
        borrowed_iterator_t<R> uninitialized_value_construct(R&& r);
 
    template<__NoThrowForwardIterator I>
      requires DefaultConstructible<iter_value_t<I>>
        I uninitialized_value_construct_n(I first, iter_difference_t<I> n);
  }
 
  template<class InputIt, class ForwardIt>
    ForwardIt uninitialized_copy(InputIt first, InputIt last, ForwardIt result);
  template<class ExecutionPolicy, class InputIt, class ForwardIt>
    ForwardIt uninitialized_copy(ExecutionPolicy&& exec,
                                 InputIt first, InputIt last, ForwardIt result);
  template<class InputIt, class Size, class ForwardIt>
    ForwardIt uninitialized_copy_n(InputIt first, Size n, ForwardIt result);
  template<class ExecutionPolicy, class InputIt, class Size, class ForwardIt>
    ForwardIt uninitialized_copy_n(ExecutionPolicy&& exec,
                                   InputIt first, Size n, ForwardIt result);
 
  namespace ranges {
    template<class I, class O>
    using uninitialized_copy_result = copy_result<I, O>;
    template<InputIterator I, Sentinel<I> S1,
             __NoThrowForwardIterator O, __NoThrowSentinel<O> S2>
      requires Constructible<iter_value_t<O>, iter_reference_t<I>>
        uninitialized_copy_result<I, O>
          uninitialized_copy(I ifirst, S1 ilast, O ofirst, S2 olast);
    template<InputRange IR, __NoThrowForwardRange OR>
      requires
        Constructible<iter_value_t<iterator_t<OR>>, iter_reference_t<iterator_t<IR>>>
        uninitialized_copy_result<borrowed_iterator_t<IR>, borrowed_iterator_t<OR>>
          uninitialized_copy(IR&& input_range, OR&& output_range);
 
    template<class I, class O>
      using uninitialized_copy_n_result = uninitialized_copy_result<I, O>;
    template<InputIterator I, __NoThrowForwardIterator O, __NoThrowSentinel<O> S>
      requires Constructible<iter_value_t<O>, iter_reference_t<I>>
        uninitialized_copy_n_result<I, O>
          uninitialized_copy_n(I ifirst, iter_difference_t<I> n, O ofirst, S olast);
  }
 
  template<class InputIt, class ForwardIt>
    ForwardIt uninitialized_move(InputIt first, InputIt last, ForwardIt result);
  template<class ExecutionPolicy, class InputIt, class ForwardIt>
    ForwardIt uninitialized_move(ExecutionPolicy&& exec,
                                 InputIt first, InputIt last, ForwardIt result);
  template<class InputIt, class Size, class ForwardIt>
    pair<InputIt, ForwardIt> uninitialized_move_n(InputIt first, Size n,
                                                  ForwardIt result);
  template<class ExecutionPolicy, class InputIt, class Size, class ForwardIt>
    pair<InputIt, ForwardIt> uninitialized_move_n(ExecutionPolicy&& exec,
                                                  InputIt first, Size n,
                                                  ForwardIt result);
 
  namespace ranges {
    template<class I, class O>
      using uninitialized_move_result = uninitialized_copy_result<I, O>;
    template<InputIterator I, Sentinel<I> S1,
             __NoThrowForwardIterator O, __NoThrowSentinel<O> S2>
      requires Constructible<iter_value_t<O>, iter_rvalue_reference_t<I>>
        uninitialized_move_result<I, O>
          uninitialized_move(I ifirst, S1 ilast, O ofirst, S2 olast);
    template<InputRange IR, __NoThrowForwardRange OR>
      requires Constructible<iter_value_t<iterator_t<OR>>,
                             iter_rvalue_reference_t<iterator_t<IR>>>
        uninitialized_move_result<borrowed_iterator_t<IR>, borrowed_iterator_t<OR>>
          uninitialized_move(IR&& input_range, OR&& output_range);
 
    template<class I, class O>
      using uninitialized_move_n_result = uninitialized_copy_result<I, O>;
    template<InputIterator I,
             __NoThrowForwardIterator O, __NoThrowSentinel<O> S>
      requires Constructible<iter_value_t<O>, iter_rvalue_reference_t<I>>
        uninitialized_move_n_result<I, O>
          uninitialized_move_n(I ifirst, iter_difference_t<I> n, O ofirst, S olast);
  }
 
  template<class ForwardIt, class T>
    void uninitialized_fill(ForwardIt first, ForwardIt last, const T& x);
  template<class ExecutionPolicy, class ForwardIt, class T>
    void uninitialized_fill(ExecutionPolicy&& exec,
                            ForwardIt first, ForwardIt last, const T& x);
  template<class ForwardIt, class Size, class T>
    ForwardIt uninitialized_fill_n(ForwardIt first, Size n, const T& x);
  template<class ExecutionPolicy, class ForwardIt, class Size, class T>
    ForwardIt uninitialized_fill_n(ExecutionPolicy&& exec,
                                   ForwardIt first, Size n, const T& x);
 
  namespace ranges {
    template<__NoThrowForwardIterator I, __NoThrowSentinel<I> S, class T>
      requires Constructible<iter_value_t<I>, const T&>
        I uninitialized_fill(I first, S last, const T& x);
    template<__NoThrowForwardRange R, class T>
      requires Constructible<iter_value_t<iterator_t<R>>, const T&>
        borrowed_iterator_t<R> uninitialized_fill(R&& r, const T& x);
 
    template<__NoThrowForwardIterator I, class T>
      requires Constructible<iter_value_t<I>, const T&>
        I uninitialized_fill_n(I first, iter_difference_t<I> n, const T& x);
  }
 
  template<class T>
    void destroy_at(T* location);
  template<class ForwardIt>
    void destroy(ForwardIt first, ForwardIt last);
  template<class ExecutionPolicy, class ForwardIt>
    void destroy(ExecutionPolicy&& exec,
                 ForwardIt first, ForwardIt last);
  template<class ForwardIt, class Size>
    ForwardIt destroy_n(ForwardIt first, Size n);
  template<class ExecutionPolicy, class ForwardIt, class Size>
    ForwardIt destroy_n(ExecutionPolicy&& exec,
                        ForwardIt first, Size n);
 
  namespace ranges {
    template<Destructible T>
      void destroy_at(T* location) noexcept;
 
    template<__NoThrowInputIterator I, __NoThrowSentinel<I> S>
      requires Destructible<iter_value_t<I>>
        I destroy(I first, S last) noexcept;
    template<__NoThrowInputRange R>
      requires Destructible<iter_value_t<iterator_t<R>>
        borrowed_iterator_t<R> destroy(R&& r) noexcept;
 
    template<__NoThrowInputIterator I>
      requires Destructible<iter_value_t<I>>
        I destroy_n(I first, iter_difference_t<I> n) noexcept;
  }
 
  // class template unique_ptr
  template<class T> struct default_delete;
  template<class T> struct default_delete<T[]>;
  template<class T, class D = default_delete<T>> class unique_ptr;
  template<class T, class D> class unique_ptr<T[], D>;
 
  template<class T, class... Args>
    unique_ptr<T> make_unique(Args&&... args);                          // T is not array
  template<class T>
    unique_ptr<T> make_unique(size_t n);                                // T is U[]
  template<class T, class... Args>
    /* unspecified */ make_unique(Args&&...) = delete;                  // T is U[N]
 
  template<class T>
    unique_ptr<T> make_unique_for_overwrite();                           // T is not array
  template<class T>
    unique_ptr<T> make_unique_for_overwrite(size_t n);                   // T is U[]
  template<class T, class... Args>
    /* unspecified */ make_unique_for_overwrite(Args&&...) = delete;     // T is U[N]
 
  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);
 
  template<class E, class T, class Y, class D>
    basic_ostream<E, T>& operator<<(basic_ostream<E, T>& os, const unique_ptr<Y, D>& p);
 
  // class bad_weak_ptr
  class bad_weak_ptr;
 
  // class template shared_ptr
  template<class T> class shared_ptr;
 
  // shared_ptr creation
  template<class T, class... Args>
    shared_ptr<T> make_shared(Args&&... args);                          // T is not array
  template<class T, class A, class... Args>
    shared_ptr<T> allocate_shared(const A& a, Args&&... args);          // T is not array
 
  template<class T>
    shared_ptr<T> make_shared(size_t N);                                // T is U[]
  template<class T, class A>
    shared_ptr<T> allocate_shared(const A& a, size_t N);                // T is U[]
 
  template<class T>
    shared_ptr<T> make_shared();                                        // T is U[N]
  template<class T, class A>
    shared_ptr<T> allocate_shared(const A& a);                          // T is U[N]
 
  template<class T>
    shared_ptr<T> make_shared(size_t N, const remove_extent_t<T>& u);   // T is U[]
  template<class T, class A>
    shared_ptr<T> allocate_shared(const A& a, size_t N,
                                  const remove_extent_t<T>& u);         // T is U[]
 
  template<class T>
    shared_ptr<T> make_shared(const remove_extent_t<T>& u);                 // T is U[N]
  template<class T, class A>
    shared_ptr<T> allocate_shared(const A& a, const remove_extent_t<T>& u); // T is U[N]
 
  template<class T>
    shared_ptr<T> make_shared_for_overwrite();                           // T is not U[]
  template<class T, class A>
    shared_ptr<T> allocate_shared_for_overwrite(const A& a);             // T is not U[]
 
  template<class T>
    shared_ptr<T> make_shared_for_overwrite(size_t N);                   // T is U[]
  template<class T, class A>
    shared_ptr<T> allocate_shared_for_overwrite(const A& a, size_t N);   // T is U[]
 
  // shared_ptr comparisons
  template<class T, class U>
    bool operator==(const shared_ptr<T>& a, const shared_ptr<U>& b) noexcept;
  template<class T, class U>
    bool operator!=(const shared_ptr<T>& a, const shared_ptr<U>& b) noexcept;
  template<class T, class U>
    bool operator<(const shared_ptr<T>& a, const shared_ptr<U>& b) noexcept;
  template<class T, class U>
    bool operator>(const shared_ptr<T>& a, const shared_ptr<U>& b) noexcept;
  template<class T, class U>
    bool operator<=(const shared_ptr<T>& a, const shared_ptr<U>& b) noexcept;
  template<class T, class U>
    bool operator>=(const shared_ptr<T>& a, const shared_ptr<U>& 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(const shared_ptr<U>& r) noexcept;
  template<class T, class U>
    shared_ptr<T> static_pointer_cast(shared_ptr<U>&& r) noexcept;
  template<class T, class U>
    shared_ptr<T> dynamic_pointer_cast(const shared_ptr<U>& r) noexcept;
  template<class T, class U>
    shared_ptr<T> dynamic_pointer_cast(shared_ptr<U>&& r) noexcept;
  template<class T, class U>
    shared_ptr<T> const_pointer_cast(const shared_ptr<U>& r) noexcept;
  template<class T, class U>
    shared_ptr<T> const_pointer_cast(shared_ptr<U>&& r) noexcept;
  template<class T, class U>
    shared_ptr<T> reinterpret_pointer_cast(const shared_ptr<U>& r) noexcept;
  template<class T, class U>
    shared_ptr<T> reinterpret_pointer_cast(shared_ptr<U>&& r) noexcept;
 
  // shared_ptr get_deleter
  template<class D, class T>
    D* get_deleter(const shared_ptr<T>& p) noexcept;
 
  // shared_ptr I/O
  template<class E, class T, class Y>
    basic_ostream<E, T>& operator<<(basic_ostream<E, T>& os, const shared_ptr<Y>& p);
 
  // class template weak_ptr
  template<class T> class weak_ptr;
 
  // weak_ptr specialized algorithms
  template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept;
 
  // class template owner_less
  template<class T = void> struct owner_less;
 
  // class template enable_shared_from_this
  template<class T> class enable_shared_from_this;
 
  // 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>>;
 
  // atomic smart pointers
  template<class T> struct atomic;
  template<class T> struct atomic<shared_ptr<T>>;
  template<class T> struct atomic<weak_ptr<T>>;
 
  // shared_ptr atomic access
  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);
}

[編集] ヘルパーコンセプト

template<class I>
concept __NoThrowInputIterator = // exposition only
  InputIterator<I> &&
  is_lvalue_reference_v<iter_reference_t<I>> &&
  Same<remove_cvref_t<iter_reference_t<I>>, iter_value_t<I>>;
 
template<class S, class I>
concept __NoThrowSentinel = Sentinel<S, I>; // exposition only
 
template<class R>
concept __NoThrowInputRange = // exposition only
  Range<R> &&
  __NoThrowInputIterator<iterator_t<R>> &&
  __NoThrowSentinel<sentinel_t<R>, iterator_t<R>>;
 
template<class I>
concept __NoThrowForwardIterator = // exposition only
  __NoThrowInputIterator<I> &&
  ForwardIterator<I> &&
  __NoThrowSentinel<I, I>;
 
template<class R>
concept __NoThrowForwardRange = // exposition only
  __NoThrowInputRange<R> &&
  __NoThrowForwardIterator<iterator_t<R>>;

注: これらの名前は説明専用であり、インタフェースの一部ではありません。

[編集] クラステンプレート std::pointer_traits

namespace std {
  template <class Ptr> struct pointer_traits {
    using pointer = Ptr;
    using element_type = /* see definition */;
    using difference_type = /* see definition */;
    template <class U> using rebind = /* see definition */;
    static pointer pointer_to(/* see definition */ r);
  };
 
  template <class T> struct pointer_traits<T*> {
    using pointer = T*;
    using element_type = T;
    using difference_type = ptrdiff_t;
    template <class U> using rebind = U*;
    static constexpr pointer pointer_to(/* see definition */ r) noexcept;
  };
}

[編集] クラス std::allocator_arg_t

namespace std {
  struct allocator_arg_t { explicit allocator_arg_t() = default; };
  inline constexpr allocator_arg_t allocator_arg{};
}

[編集] クラステンプレート std::allocator_traits

namespace std {
  template<class Alloc> struct allocator_traits {
    using allocator_type     = Alloc;
 
    using value_type         = typename Alloc::value_type;
 
    using pointer            = /* see definition */;
    using const_pointer      = /* see definition */;
    using void_pointer       = /* see definition */;
    using const_void_pointer = /* see definition */;
 
    using difference_type    = /* see definition */;
    using size_type          = /* see definition */;
 
    using propagate_on_container_copy_assignment = /* see definition */;
    using propagate_on_container_move_assignment = /* see definition */;
    using propagate_on_container_swap            = /* see definition */;
    using is_always_equal                        = /* see definition */;
 
    template<class T> using rebind_alloc = /* see definition */;
    template<class T> using rebind_traits = allocator_traits<rebind_alloc<T>>;
 
    [[nodiscard]] static pointer allocate(Alloc& a, size_type n);
    [[nodiscard]] static pointer allocate(Alloc& a, size_type n, const_void_pointer hint);
 
    static void deallocate(Alloc& a, pointer p, size_type n);
 
    template<class T, class... Args>
      static void construct(Alloc& a, T* p, Args&&... args);
 
    template<class T>
      static void destroy(Alloc& a, T* p);
 
    static size_type max_size(const Alloc& a) noexcept;
 
    static Alloc select_on_container_copy_construction(const Alloc& rhs);
  };
}

[編集] クラステンプレート std::allocator

namespace std {
  template<class T> class allocator {
   public:
    using value_type                             = T;
    using size_type                              = size_t;
    using difference_type                        = ptrdiff_t;
    using propagate_on_container_move_assignment = true_type;
    using is_always_equal                        = true_type;
 
    constexpr allocator() noexcept;
    constexpr allocator(const allocator&) noexcept;
    template<class U> constexpr allocator(const allocator<U>&) noexcept;
    ~allocator();
    allocator& operator=(const allocator&) = default;
 
    [[nodiscard]] T* allocate(size_t n);
    void deallocate(T* p, size_t n);
  };
}

[編集] クラステンプレート std::default_delete

namespace std {
  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;
  };
 
  template<class T> struct default_delete<T[]> {
    constexpr default_delete() noexcept = default;
    template<class U> default_delete(const default_delete<U[]>&) noexcept;
    template<class U> void operator()(U* ptr) const;
  };
}

[編集] クラステンプレート std::unique_ptr

namespace std {
  template<class T, class D = default_delete<T>> class unique_ptr {
  public:
    using pointer      = /* see definition */;
    using element_type = T;
    using deleter_type = D;
 
    // constructors
    constexpr unique_ptr() noexcept;
    explicit unique_ptr(pointer p) noexcept;
    unique_ptr(pointer p, /* see definition */ d1) noexcept;
    unique_ptr(pointer p, /* see definition */ d2) noexcept;
    unique_ptr(unique_ptr&& u) noexcept;
    constexpr unique_ptr(nullptr_t) noexcept;
    template<class U, class E>
      unique_ptr(unique_ptr<U, E>&& u) noexcept;
 
    // 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
    add_lvalue_reference_t<T> 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;
 
    // disable copy from lvalue
    unique_ptr(const unique_ptr&) = delete;
    unique_ptr& operator=(const unique_ptr&) = delete;
  };
 
  template<class T, class D> class unique_ptr<T[], D> {
  public:
    using pointer      = /* see definition */;
    using element_type = T;
    using deleter_type = D;
 
    // constructors
    constexpr unique_ptr() noexcept;
    template<class U> explicit unique_ptr(U p) noexcept;
    template<class U> unique_ptr(U p, /* see definition */ d) noexcept;
    template<class U> unique_ptr(U p, /* see definition */ d) noexcept;
    unique_ptr(unique_ptr&& u) noexcept;
    template<class U, class E>
      unique_ptr(unique_ptr<U, E>&& u) noexcept;
    constexpr unique_ptr(nullptr_t) noexcept;
 
    // 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
    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;
    template<class U> void reset(U p) noexcept;
    void reset(nullptr_t = nullptr) noexcept;
    void swap(unique_ptr& u) noexcept;
 
    // disable copy from lvalue
    unique_ptr(const unique_ptr&) = delete;
    unique_ptr& operator=(const unique_ptr&) = delete;
  };
}

[編集] クラス std::bad_weak_ptr

namespace std {
  class bad_weak_ptr : public exception {
  public:
    bad_weak_ptr() noexcept;
  };
}

[編集] クラステンプレート std::shared_ptr

namespace std {
  template<class T> class shared_ptr {
  public:
    using element_type = remove_extent_t<T>;
    using weak_type    = weak_ptr<T>;
 
    // constructors
    constexpr shared_ptr() noexcept;
    constexpr shared_ptr(nullptr_t) noexcept : shared_ptr() { }
    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, element_type* p) noexcept;
    template<class Y>
      shared_ptr(shared_ptr<Y>&& r, element_type* 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, class D>
      shared_ptr(unique_ptr<Y, D>&& r);
 
    // 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) noexcept;
    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
    element_type* get() const noexcept;
    T& operator*() const noexcept;
    T* operator->() const noexcept;
    element_type& operator[](ptrdiff_t i) const;
    long use_count() const noexcept;
    explicit operator bool() const noexcept;
    template<class U>
      bool owner_before(const shared_ptr<U>& b) const noexcept;
    template<class U>
      bool owner_before(const weak_ptr<U>& 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>;
}

[編集] クラステンプレート std::weak_ptr

namespace std {
  template<class T> class weak_ptr {
  public:
    using element_type = remove_extent_t<T>;
 
    // constructors
    constexpr weak_ptr() noexcept;
    template<class Y>
      weak_ptr(const shared_ptr<Y>& r) noexcept;
    weak_ptr(const weak_ptr& r) noexcept;
    template<class Y>
      weak_ptr(const weak_ptr<Y>& r) noexcept;
    weak_ptr(weak_ptr&& r) noexcept;
    template<class Y>
      weak_ptr(weak_ptr<Y>&& r) noexcept;
 
    // destructor
    ~weak_ptr();
 
    // assignment
    weak_ptr& operator=(const weak_ptr& r) noexcept;
    template<class Y>
      weak_ptr& operator=(const weak_ptr<Y>& r) noexcept;
    template<class Y>
      weak_ptr& operator=(const shared_ptr<Y>& r) noexcept;
    weak_ptr& operator=(weak_ptr&& r) noexcept;
    template<class Y>
      weak_ptr& operator=(weak_ptr<Y>&& r) noexcept;
 
    // 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(const shared_ptr<U>& b) const noexcept;
    template<class U>
      bool owner_before(const weak_ptr<U>& b) const noexcept;
  };
 
  template<class T>
    weak_ptr(shared_ptr<T>) -> weak_ptr<T>;
}

[編集] クラステンプレート std::owner_less

namespace std {
  template<class T = void> struct owner_less;
 
  template<class T> struct owner_less<shared_ptr<T>> {
    bool operator()(const shared_ptr<T>&, const shared_ptr<T>&) const noexcept;
    bool operator()(const shared_ptr<T>&, const weak_ptr<T>&) const noexcept;
    bool operator()(const weak_ptr<T>&, const shared_ptr<T>&) const noexcept;
  };
 
  template<class T> struct owner_less<weak_ptr<T>> {
    bool operator()(const weak_ptr<T>&, const weak_ptr<T>&) const noexcept;
    bool operator()(const shared_ptr<T>&, const weak_ptr<T>&) const noexcept;
    bool operator()(const weak_ptr<T>&, const shared_ptr<T>&) const noexcept;
  };
 
  template<> struct owner_less<void> {
    template<class T, class U>
      bool operator()(const shared_ptr<T>&, const shared_ptr<U>&) const noexcept;
    template<class T, class U>
      bool operator()(const shared_ptr<T>&, const weak_ptr<U>&) const noexcept;
    template<class T, class U>
      bool operator()(const weak_ptr<T>&, const shared_ptr<U>&) const noexcept;
    template<class T, class U>
      bool operator()(const weak_ptr<T>&, const weak_ptr<U>&) const noexcept;
 
    using is_transparent = /* unspecified */;
  };
}

[編集] クラステンプレート std::enable_shared_from_this

namespace std {
  template<class T> class enable_shared_from_this {
  protected:
    constexpr enable_shared_from_this() noexcept;
    enable_shared_from_this(const enable_shared_from_this&) noexcept;
    enable_shared_from_this& operator=(const enable_shared_from_this&) noexcept;
    ~enable_shared_from_this();
 
  public:
    shared_ptr<T> shared_from_this();
    shared_ptr<T const> shared_from_this() const;
    weak_ptr<T> weak_from_this() noexcept;
    weak_ptr<T const> weak_from_this() const noexcept;
 
  private:
    mutable weak_ptr<T> weak_this;  // exposition only
  };
}

[編集] クラステンプレート std::atomic の std::shared_ptr に対する特殊化

namespace std {
  template<class T> struct atomic<shared_ptr<T>> {
    using value_type = shared_ptr<T>;
    static constexpr bool is_always_lock_free = /* implementation-defined */;
 
    bool is_lock_free() const noexcept;
    void store(shared_ptr<T> desired, memory_order order = memory_order::seq_cst) noexcept;
    shared_ptr<T> load(memory_order order = memory_order::seq_cst) const noexcept;
    operator shared_ptr<T>() const noexcept;
 
    shared_ptr<T> exchange(shared_ptr<T> desired,
                           memory_order order = memory_order::seq_cst) noexcept;
 
    bool compare_exchange_weak(shared_ptr<T>& expected, shared_ptr<T> desired,
                               memory_order success, memory_order failure) noexcept;
    bool compare_exchange_strong(shared_ptr<T>& expected, shared_ptr<T> desired,
                                 memory_order success, memory_order failure) noexcept;
 
    bool compare_exchange_weak(shared_ptr<T>& expected, shared_ptr<T> desired,
                               memory_order order = memory_order::seq_cst) noexcept;
    bool compare_exchange_strong(shared_ptr<T>& expected, shared_ptr<T> desired,
                                 memory_order order = memory_order::seq_cst) noexcept;
 
    constexpr atomic() noexcept = default;
    atomic(shared_ptr<T> desired) noexcept;
    atomic(const atomic&) = delete;
    void operator=(const atomic&) = delete;
    void operator=(shared_ptr<T> desired) noexcept;
 
  private:
    shared_ptr<T> p;            // exposition only
  };
}

[編集] クラステンプレート std::atomic の std::weak_ptr に対する特殊化

namespace std {
  template<class T> struct atomic<weak_ptr<T>> {
    using value_type = weak_ptr<T>;
    static constexpr bool is_always_lock_free = /* implementation-defined */;
 
    bool is_lock_free() const noexcept;
    void store(weak_ptr<T> desired, memory_order order = memory_order::seq_cst) noexcept;
    weak_ptr<T> load(memory_order order = memory_order::seq_cst) const noexcept;
    operator weak_ptr<T>() const noexcept;
 
    weak_ptr<T> exchange(weak_ptr<T> desired,
                         memory_order order = memory_order::seq_cst) noexcept;
 
    bool compare_exchange_weak(weak_ptr<T>& expected, weak_ptr<T> desired,
                               memory_order success, memory_order failure) noexcept;
    bool compare_exchange_strong(weak_ptr<T>& expected, weak_ptr<T> desired,
                                 memory_order success, memory_order failure) noexcept;
 
    bool compare_exchange_weak(weak_ptr<T>& expected, weak_ptr<T> desired,
                               memory_order order = memory_order::seq_cst) noexcept;
    bool compare_exchange_strong(weak_ptr<T>& expected, weak_ptr<T> desired,
                                 memory_order order = memory_order::seq_cst) noexcept;
 
    constexpr atomic() noexcept = default;
    atomic(weak_ptr<T> desired) noexcept;
    atomic(const atomic&) = delete;
    void operator=(const atomic&) = delete;
    void operator=(weak_ptr<T> desired) noexcept;
 
  private:
    weak_ptr<T> p;              // exposition only
  };
}

「https://ja.cppreference.com/mwiki/index.php?title=cpp/header/memory&oldid=49293」から取得

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フリースタンディング処理系とホスト処理系
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アルゴリズムライブラリ
数値演算ライブラリ
ローカライゼーションライブラリ
入出力ライブラリ
ファイルシステムライブラリ (C++17)
正規表現ライブラリ (C++11)
アトミック操作ライブラリ (C++11)
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名前空間

変種

表示

操作

標準ライブラリヘッダ <memory>

目次

クラス

ポインタ特性

ガベージコレクションサポート

アロケータ

未初期化記憶域

スマートポインタ

ヘルパークラス

関数

その他

ガベージコレクションサポート

未初期化記憶域

スマートポインタの非メンバ操作

ニーブロイド

未初期化記憶域

[編集] 概要

[編集] ヘルパーコンセプト

[編集] クラステンプレート std::pointer_traits

[編集] クラス std::allocator_arg_t

[編集] クラステンプレート std::allocator_traits

[編集] クラステンプレート std::allocator

[編集] クラステンプレート std::default_delete

[編集] クラステンプレート std::unique_ptr

[編集] クラス std::bad_weak_ptr

[編集] クラステンプレート std::shared_ptr

[編集] クラステンプレート std::weak_ptr

[編集] クラステンプレート std::owner_less

[編集] クラステンプレート std::enable_shared_from_this

[編集] クラステンプレート std::atomic の std::shared_ptr に対する特殊化

[編集] クラステンプレート std::atomic の std::weak_ptr に対する特殊化

案内

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