AQS

http://www.infoq.com/cn/articles/jdk1.8-abstractqueuedsynchronizer?utm_source=infoq&utm_campaign=user_page&utm_medium=link

http://www.infoq.com/cn/articles/java8-abstractqueuedsynchronizer?utm_source=infoq&utm_campaign=user_page&utm_medium=link

http://ifeve.com/introduce-abstractqueuedsynchronizer/

http://www.cnblogs.com/xingele0917/p/4284228.html

http://blog.csdn.net/guangcigeyun/article/details/8278361

http://www.cnblogs.com/uttu/archive/2013/02/07/2909059.html

http://www.molotang.com/articles/487.html

http://www.cnblogs.com/zhanjindong/p/java-concurrent-package-aqs-overview.html

http://www.acyouzi.com/2016/11/21/java-parallel-abstractqueuedsynchronizer/#关于-tryAcquire-tryRelease-的重写，以及公平锁

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