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std::atomic_ref<T>:: is_lock_free

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atomic_ref::is_lock_free
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Constants
bool is_lock_free ( ) const noexcept ;
(C++20 起)

检查此对象的原子操作是否无锁。

目录

参数

(无)

返回值

true 表示该对象的原子操作是无锁的， false 则表示相反情况。

注释

除 std::atomic_flag 外的所有原子类型，均可通过互斥锁或其他锁定操作实现，而非必须使用无锁的原子CPU指令。原子类型也允许 有时 具备无锁特性，例如在特定架构中若仅对齐内存访问本身是原子的，则同类型的未对齐对象必须使用锁机制。

C++标准建议（但不强制要求）无锁原子操作同时也是地址无关的，即适用于使用共享内存的进程间通信。

示例

本节内容不完整
原因：缺少示例

参见

[static]
指示该类型始终是无锁的
(公开静态成员常量)