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Xiànchéng zhī jiān de hù chì suǒ, dāng xiànchéng zhī jiān suǒyòng de zīyuán xiāngtóng, yào tóngshí fǎngwèn, wèile fángzhǐ chōngtú, yào yòng hù chì suǒ.Mutex between threads, when the same resources between threads used to simultaneously access, in order to prevent conflict, to use mutex.