ReentrantReadWriteLock

https://blog.csdn.net/zla85/article/details/77970152?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-2-77970152-blog-115026768.pc_relevant_multi_platform_whitelistv1&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-2-77970152-blog-115026768.pc_relevant_multi_platform_whitelistv1&utm_relevant_index=5