AQS的原理

java thread 之AQS (重点)
http://www.cnblogs.com/nod0620/archive/2012/07/23/2605504.html

JAVA并发编程学习笔记之AQS源码分析（获取与释放）
http://blog.csdn.net/aesop_wubo/article/details/7555956

AQS的原理浅析
http://ifeve.com/java-special-troops-aqs/

深入浅出 Java Concurrency (7): 锁机制 part 2 AQS
http://www.blogjava.net/xylz/archive/2010/07/06/325390.html

Doug lee The java.util.concurrent Synchronizer Framework
http://gee.cs.oswego.edu/dl/papers/aqs.pdf