Semaphore

概述

共享鎖，運(yùn)行多個(gè)線程同時(shí)臨界區(qū)

主要接口

public void acquire()
public void acquireUninterruptibly()
public boolean tryAcquire()
public boolean tryAcquire(long timeout, TimeUnit unit)
public void release() 

使用

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