x86是否具有原子增量来保留存储的值? [英] Does x86 have an atomic increment that keeps the value that was stored?

问题描述

我发现了lock inc addr，但这并不能保留存储的值的副本，甚至在竞争写入之后也会在同一线程中立即读取它.

I have found lock inc addr but that doesn't keep a copy of the stored value around and even a read immediately after it in the same thread could come after a competing write.

我找到的最佳解决方案是load/inc/ cas 循环.

The best solution I have found is a load/inc/cas loop.

推荐答案

lock xadd是你的朋友.

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