Java and contracting (JUC) provides many concurrent tool, which, we are familiar with many concurrent tools, such as ReentrangLock, Semaphore, they are used to achieve a common base class - AbstractQueuedSynchronizer , referred to AQS. AQS is used to build a frame lock and a synchronizer, using AQS can be constructed simply and efficiently a large number of widely synchronizer, such as we mentioned ReentrantLock, Semaphore, such as other ReentrantReadWriteLock, SynchronousQueue, FutureTask like are It is based on the AQS. Of course, we ourselves can be very easily configured easily to meet our own needs synchronizer use AQS.
In this chapter we will explore together under the magical stuff, understand and analyze their implementation principle
The basic implementation principle