Semaphore mechanism solves process synchronization / mutex issues

Semaphore mechanism solves process synchronization / mutex issues //我知道CSDN有许多非中文母语的人阅读，为解决此问题，给出英文版本，并在图片下方非代码部分给出中文的英文注释。 //I know CSDN is read by many non-native Chinese speakers. In order to solve

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