ReentrantReadWriteLock
2017-09-05 17:25
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ReentrantReadWriteLock介绍
ReentrantReadWriteLock是读写锁,它维护了一对相关的锁读取锁和
写入锁,一个用于读操作,另一个用于写操作
读取锁:用于只读操作,这它是“共享锁“,能同时被多个线程获取.
写入锁:用于写入操作,它是“独占锁”,写入锁只能被一个线程锁获取。
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