std::pmr::polymorphic_allocator<T>::deallocate_bytes

 

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voidify (僅作說明*) 未初始化記憶體演算法 uninitialized_copy uninitialized_fill uninitialized_move (C++17) uninitialized_default_construct (C++17) uninitialized_value_construct (C++17) destroy (C++17) destroy_at (C++17) uninitialized_copy_n (C++11) uninitialized_fill_n uninitialized_move_n (C++17) uninitialized_default_construct_n (C++17) uninitialized_value_construct_n (C++17) destroy_n (C++17) construct_at (C++20) 受約束的未初始化 記憶體演算法 ranges::uninitialized_copy (C++20) ranges::uninitialized_fill (C++20) ranges::uninitialized_move (C++20) ranges::construct_at (C++20) ranges::destroy (C++20) ranges::destroy_n (C++20) ranges::destroy_at (C++20) ranges::uninitialized_copy_n (C++20) ranges::uninitialized_fill_n (C++20) ranges::uninitialized_move_n (C++20) ranges::uninitialized_default_construct (C++20) ranges::uninitialized_value_construct (C++20) ranges::uninitialized_default_construct_n (C++20)  ranges::uninitialized_value_construct_n (C++20) C 庫 malloc calloc realloc aligned_alloc (C++17) free

分配器 allocator allocator_traits (C++11) allocation_result (C++23) 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) 記憶體資源 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) 垃圾回收支援 declare_reachable (C++11)(直到 C++23) undeclare_reachable (C++11)(直到 C++23) declare_no_pointers (C++11)(直到 C++23) undeclare_no_pointers (C++11)(直到 C++23) pointer_safety (C++11)(直到 C++23) get_pointer_safety (C++11)(直到 C++23) 未初始化儲存 raw_storage_iterator (直到 C++20*) get_temporary_buffer (直到 C++20*) return_temporary_buffer (直到 C++20*) 顯式生命週期管理 start_lifetime_asstart_lifetime_as_array (C++23)(C++23)

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std::pmr::polymorphic_allocator

成員函式

polymorphic_allocator::polymorphic_allocator

polymorphic_allocator::allocate

polymorphic_allocator::deallocate

polymorphic_allocator::construct

polymorphic_allocator::destroy (C++20/26*)

polymorphic_allocator::allocate_bytes (C++20)

polymorphic_allocator::deallocate_bytes (C++20)

polymorphic_allocator::allocate_object (C++20)

polymorphic_allocator::deallocate_object (C++20)

polymorphic_allocator::new_object (C++20)

polymorphic_allocator::delete_object (C++20)

polymorphic_allocator::select_on_container_copy_construction

polymorphic_allocator::resource

非成員函式

operator==operator!= (until C++20)

 

void deallocate_bytes( void* p,                        std::size_t nbytes,                        std::size_t alignment = alignof(std::max_align_t) );		(C++20 起)

釋放 p 指向的儲存，該儲存必須是透過與 *resource() 比較相等的 std::pmr::memory_resource x，使用 x.allocate(nbytes, alignment) 分配的，通常是透過呼叫 allocate_bytes(nbytes, alignment)。

等價於 resource()->deallocate(p, nbytes, alignment);。

引數

p	-	指向要釋放的記憶體的指標
nbytes	-	最初分配的位元組數
alignment	-	最初分配的對齊方式

異常

不丟擲任何異常。

注意

此函式是為與完全特化分配器 std::pmr::polymorphic_allocator<> 一起使用而引入的，但它在任何特化中都可能有用。

參閱

deallocate_object (C++20)	釋放由 allocate_object 獲取的原始記憶體 (公共成員函式)
delete_object (C++20)	銷燬並釋放一個物件 (公共成員函式)
deallocate [靜態]	使用分配器釋放儲存 (std::allocator_traits<Alloc> 的公共靜態成員函式)
deallocate	釋放記憶體 (std::pmr::memory_resource 的公共成員函式)