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std::atomic_ref<T>:: required_alignment

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Constants
atomic_ref::required_alignment
static constexpr std:: size_t required_alignment = /*implementation-defined*/ ;
(C++20 起)

required_alignment 的值是原子引用所引用对象所需的对齐要求，该值至少为 alignof ( T ) 。

注释

硬件可能要求被 atomic_ref<T> 引用的对象比其他 T 对象具有更严格的对齐要求，并且对 atomic_ref 的操作是否无锁可能取决于被引用对象的对齐方式。