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Standard library header <hazard_pointer> (C++26)

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Standard library headers
 

This header is part of the thread support library.

allows an object to be hazard-protectable
(class template) [edit]
single-writer multi-reader pointer that can be owned by at most one thread at any point of time
(class) [edit]

Functions

constructs a hazard pointer
(function) [edit]
specializes the std::swap algorithm
(function template) [edit]

[edit] Synopsis

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;
}

[edit] Class template 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
 };
}

[edit] Class 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;
 };
}
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