valatile https://blog.csdn.net/qq_29350001/article/details/54024070
https://blog.csdn.net/qq_43401808/article/details/86540962
https://blog.csdn.net/zjzto/article/details/52328241
C++11 原子操作
https://www.cnblogs.com/ittinybird/p/4830834.html
std::memory_order
https://en.cppreference.com/w/cpp/atomic/memory_order
无锁
https://www.ibm.com/developerworks/cn/aix/library/au-multithreaded_structures1/index.html?ca=drs-
