多线程
A straightforward way to implement multithreaded applications is to associate a lightweight process with each thread. 一种实现多线程程序最直接的方法就是用一个轻进程关联每个线程。
Synchronization provides a compromise between the unstructured nature of multithreaded programming and the structured order of synchronous processing. 同步可以在多线程编程的非结构化特性与同步处理的结构化顺序之间进行平衡。
