线程池的实现主要分为三部分，线程的创建、添加任务到线程池中、工作线程从任务队列中取出任务进行处理。 主要有两个类来实现，CTask,CThreadPool-Implementation of thread pool is divided into three parts, thread creation, add the task to the thread pool, work out a thread from the task queue task for processing. Th