AQS源码

╰半橙微兮° 2023-10-06 08:27 9阅读 0赞

![在这里插入图片描述][20200509130408277.jpeg]

> addWaiter往队列里添加线程节点的CAS操作：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70]

> 尝试获取锁：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 1]

> VarHandle是指向某个变量的引用。  
> ①普通属性原子操作。②比反射快，直接操作二进制码

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 2]

> VarHandle可以对值进行CAS原子性操作：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 3]

[20200509130408277.jpeg]: https://img-blog.csdnimg.cn/20200509130408277.jpeg
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