Java-SSM框架相关的面试题收集和整理 | 干货面试教程总结与分享

什么是自旋锁和互斥锁？

由于CLH锁是一种自旋锁，那么我们先来看看自旋锁是什么？

**self-rotation lock is essentially a mutual exclusion lock. The distinction lies in that threads unable to acquire the lock will remain in a busy-waiting state indefinitely until the lock is released. In this state, waiting threads do not enter a sleep mode but instead waste CPU cycles in an endless loop. Consequently, self-rotation locks are most suitable for scenarios where the expected acquisition time of the lock is brief.

本文提到了自旋lock机制后，我们不妨顺便探讨一下互斥lock的概念。其中，在多态对象模型中使用较多的是self lock机制（即self-locking），其核心思想是：当一个对象 instance 在被其他 instance 夺取时（即同