标准库头文件 <hazard_pointer> (C++26)
来自 cppreference.com
此头文件是 线程支持 库的一部分。
类 | ||
(C++26) |
允许对象受到危险保护 (类模板) | |
(C++26) |
单写多读指针,在任何时间点最多只能由一个线程拥有 (类) | |
函数 | ||
(C++26) |
构造一个危险指针 (函数) | |
专门用于 std::swap 算法 (函数模板) |
[编辑] 概要
namespace std { // hazard_pointer_obj_base template<class T, class D = default_delete<T>> class hazard_pointer_obj_base; // hazard_pointer class hazard_pointer; // make_hazard_pointer hazard_pointer make_hazard_pointer(); void swap(hazard_pointer&, hazard_pointer&) noexcept; }
[编辑] 类模板 std::hazard_pointer_obj_base
namespace std { template<class T, class D = default_delete<T>> class hazard_pointer_obj_base { public: void retire(D d = D()) noexcept; protected: hazard_pointer_obj_base() = default; hazard_pointer_obj_base(const hazard_pointer_obj_base&) = default; hazard_pointer_obj_base(hazard_pointer_obj_base&&) = default; hazard_pointer_obj_base& operator=(const hazard_pointer_obj_base&) = default; hazard_pointer_obj_base& operator=(hazard_pointer_obj_base&&) = default; ~hazard_pointer_obj_base() = default; private: D deleter; // exposition only }; }
[编辑] 类 std::hazard_pointer
namespace std { class hazard_pointer { public: hazard_pointer() noexcept; hazard_pointer(hazard_pointer&&) noexcept; hazard_pointer& operator=(hazard_pointer&&) noexcept; ~hazard_pointer(); bool empty() const noexcept; template<class T> T* protect(const atomic<T*>& src) noexcept; template<class T> bool try_protect(T*& ptr, const atomic<T*>& src) noexcept; template<class T> void reset_protection(const T* ptr) noexcept; void reset_protection(nullptr_t = nullptr) noexcept; void swap(hazard_pointer&) noexcept; }; }