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std::atomic_ref<T>:: is_always_lock_free

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atomic_ref::is_always_lock_free
static constexpr bool is_always_lock_free = /*implementation-defined*/ ;
(C++20以降)

この atomic_ref 型に対する操作が常にロックフリーである場合は true に等しく、決してロックフリーでない場合、または時々ロックフリーである場合は false となります。

この定数の値は、メンバー関数 is_lock_free の結果と一致します。

関連項目

atomic_ref オブジェクトがロックフリーかどうかをチェックする
(公開メンバ関数)