std::experimental::atomic_weak_ptr<T>::is_lock_free

bool is_lock_free() const noexcept;

检查此类型的所有对象的原子操作是否为无锁的。

(无)

true 如果此类型的对象的原子操作是无锁的，则为 true，false 否则为 false。

(C++20 中已弃用)(C++26 中已移除)

为 std::shared_ptr 特化原子操作
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atomic_weak_ptr::atomic_weak_ptr
atomic_weak_ptr::operator=
atomic_weak_ptr::is_lock_free
atomic_weak_ptr::store
atomic_weak_ptr::load
atomic_weak_ptr::operator weak_ptr<T>
atomic_weak_ptr::exchange
atomic_weak_ptr::compare_exchange_weakatomic_weak_ptr::compare_exchange_strong