如何实现互斥体？ [英] How are mutexes implemented?

问题描述

对于特定应用程序，某些实现是否比其他实现更好？

Are some implementations better than others for specific applications? Is there anything to earn by rolling out your own?

推荐答案

查看测试和设置机器指令维基百科，这暗示了原子操作如何在机器级实现。我可以想象大多数语言级的互斥实现依赖于机器级的支持，如Test-and-set。

Check out the description of the Test-and-set machine instruction on Wikipedia, which alludes to how atomic operations are achieved at the machine level. I can imagine most language-level mutex implementations rely on machine-level support such as Test-and-set.

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