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ReentrantLock

网络可重入锁；重进入锁

ReentrantLock

ReentrantLock

ReentrantLock

可重入锁

什么是可重入锁（ReentrantLock）？当一个线程进入某个对象的一个synchronized的实例方法后，其它线程是否可进入此对象 …

重进入锁

Mercy Blog - BlogJava ... 3.1.1.1 核心- AbstractQueuedSynchronizer 3.1.1.2 重进入锁- ReentrantLock ...

1

However , the existence of these obvious benefits are not a good enough reason to always prefer ReentrantLock to synchronized .

但是，这些明显存在的好处，还不足以成为用 ReentrantLock 代替 synchronized 的理由。

2

You 'll see that atomic variables offer an additional improvement over ReentrantLock, which already had a big advantage over synchronization .

您将看到，虽然 ReentrantLock 拥有比同步更多的优点，但相对于 ReentrantLock ，原子变量提供了其他改进。

3

So the fact that ReentrantLocks are "unfair " by default is simply making explicit something that was true all along for synchronization .

所以，默认情况下 ReentrantLock 是 “不公平 ”的，这一事实只是把同步中一直是事件的东西表面化而已。

4

As a bonus, the implementation of ReentrantLock is far more scalable under contention than the current implementation of synchronized .

除此之外，与目前的 synchronized 实现相比，争用下的 ReentrantLock 实现更具可伸缩性。

5

Or even rewrite our existing synchronized code in terms of ReentrantLock?

或者甚至用 ReentrantLock 重写我们现有的 synchronized 代码？

6

The stated goal was to answer the question , "Which is faster, synchronization or ReentrantLock? "

此举的目的是回答以下问题：“哪一个更快，同步还是 ReentrantLock ？”

7

ReentrantLock, in turn, uses atomic variables to maintain the queue of threads waiting for the lock .

然后，ReentrantLock 使用原子变量来维护等待锁定的线程队列。

8

However , using the new ReentrantLock approach , you will see a blocked count of zero .

但是，使用新的 ReentrantLock 方式，会看到一个为 0 的阻塞计数。

9

Listing 1 . Protecting a block of code with ReentrantLock.

清单 1 .用 ReentrantLock 保护代码块。

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