Overall context of concurrent programming

Three core issues of concurrent programming

1. Division of labor ： How to efficiently disassemble tasks and assign them to threads
2. Sync ： How threads work together
3. Mutually exclusive ： Only one thread is allowed to access shared resources at the same time ---- Thread safety problem ： visibility 、 Order and atomicity

Compare with the real world

Jump out , Look at the panorama ; Go in , See the essence

![ Panorama ](https://img-blog.csdnimg.cn/0ad6c73a41cf4cc2ad41f76d65a12296.png)