std::pmr::new_delete_resource

 

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智能指针 unique_ptr (C++11) shared_ptr (C++11) weak_ptr (C++11) auto_ptr (C++17 前) owner_less (C++11) enable_shared_from_this (C++11) bad_weak_ptr (C++11) default_delete (C++11) out_ptr_t (C++23) inout_ptr_t (C++23) 分配器 allocator allocator_traits (C++11) allocation_result (C++23) allocate_at_least (C++23) allocator_arg_t (C++11) allocator_arg (C++11) uses_allocator (C++11) uses_allocator_construction_args (C++20) make_obj_using_allocator (C++20) uninitialized_construct_using_allocator (C++20) scoped_allocator_adaptor (C++11) pmr::polymorphic_allocator (C++17) 内存资源 pmr::memory_resource (C++17) pmr::get_default_resource (C++17) pmr::set_default_resource (C++17) pmr::new_delete_resource (C++17) pmr::null_memory_resource (C++17) pmr::synchronized_pool_resource (C++17) pmr::unsynchronized_pool_resource (C++17) pmr::monotonic_buffer_resource (C++17) pmr::pool_options (C++17) 未初始化存储 raw_storage_iterator (C++20 前) get_temporary_buffer (C++20 前) return_temporary_buffer (C++20 前)

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定义于头文件 <memory_resource>
std::pmr::memory_resource* new_delete_resource() noexcept;		(C++17 起)

返回指向使用全局 operator new 与 operator delete 分配内存的 memory_resource 的指针。

返回值

返回指针 p ，指向导出自 std::pmr::memory_resource 类型的静态存储期对象，它拥有下列属性：

• 其 allocate() 函数用 ::operator new 分配内存；
• 其 deallocate() 函数用 ::operator delete 解分配内存；
• 对于任何 memory_resource r ， p->is_equal(r) 返回 &r == p.

每次调用此函数时返回相同值。