Read-Write Lock mode expansion

https://blog.csdn.net/tanga842428/article/details/52789801

 

http://www.cnblogs.com/gongchengshidemeng/p/9420096.html

 

https://www.cnblogs.com/shan1393/p/9017450.html

 

https://blog.csdn.net/jr_soft/article/details/46516015 implement a cache system with read-write lock