std::thread, std::mutex, lambda表达式

std::thread
https://www.runoob.com/w3cnote/cpp-std-thread.html

std::mutex
https://www.cnblogs.com/exciting/p/11163623.html
https://www.jianshu.com/p/8bd389d4ed83

lambda表达式
https://www.cnblogs.com/HDK2016/p/11183341.html