Locking occurs on two levels (see Listing 7) : The list has a read-write lock, while individual nodes contain a mutex.

在两个级别上执行锁定(见清单7)：链表有一个读写锁，各个节点包含一个互斥锁。

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The mutex API provides five functions: three are used for locking, one for unlocking, and another for testing a mutex.

互斥锁api提供了5个函数：其中3个用于锁定，一个用于解锁，另一个用于测试互斥锁。

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To help minimize mutex allocation and locking time, the JVM manages a global lock cache and a per-thread lock cache where each cache contains unallocated pthread_mutexes.

为了帮助实现互斥锁分配和锁定时间的最小化，JVM 管理一个全局锁缓存和一个单线程锁缓存，其中每个缓存包含了未分配的 pthread_mutex。

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