order of atom var

最新推荐文章于 2025-12-06 19:00:36 发布

原创最新推荐文章于 2025-12-06 19:00:36 发布 · 79 阅读

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文章解释了std::memory_order_acquire在存储操作中的效果等同于std::memory_order_relaxed，因为前者只影响加载，而存储操作不涉及。反之，std::memory_order_release在加载操作时等同于std::memory_order_relaxed，因它只控制存储。作者对某些开发者不能理解这个简单的规则表示疑惑。

remember this :

std::memory_order_acquire with a store operation is equivalent to std::memory_order_relaxed

std::memory_order_release with a load operation is equivalent to std::memory_order_relaxed

In practice, using std::memory_order_acquire with a store operation is equivalent to std::memory_order_relaxed because std::memory_order_acquire only orders loads but a store operation doesn’t load anything. Similarly, using std::memory_order_release with a load operation is equivalent to std::memory_order_relaxed because std::memory_order_release only orders stores but a load operation doesn’t store anything.

not know why so many or almost all motherfxcker "big tech guy" can not say the very simple rule.