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基于redis的分布式锁实现 | Aoho's Blog

 6 years ago
source link: http://blueskykong.com/2018/01/06/redislock/?
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neoserver,ios ssh client
分布式锁很久之前有讲过并发编程中的锁并发编程的锁机制:synchronized和lock。在单进程的系统中,当存在多个线程可以同时改变某个变量时,就需要对变量或代码块做同步,使其在修改这种变量时能够线性执行消除并发修改变量。而同步的本质是通过锁来实现的。为了实现多个线程在一个时刻同一个代码块只能有一个线程可执行,那么需要在某个地方做个标记,这个标记必须每个线程都能看到,当标记不存在时可以设置该标记

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