With this type of lock, concurrent applications can read from or write to the locked table.
有了这一类型的锁，并发应用程序就可以读或写已锁定的表。
The reason this technique is called the "cheap read-write lock" is that you are using different synchronization mechanisms for reads and writes.
之所以将这种技术称之为 “开销较低的读-写锁” 是因为您使用了不同的同步机制进行读写操作。
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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