说明：  相对所谓的传统状态机编写方式来说，使用函数指针作为中间介质来进行间接调用的方式就是所谓的“指针法状态机”。 指针法状态机其本质与合作式调度器几乎就是同义词，或者说是调度器的一个“状态机”编程模式
(Relative to write so-called traditional state machine approach, using a function pointer as an intermediate medium for indirect way is to invoke the so-called "pointer Act state machine." Pointer law state machine by its very nature and cooperative scheduler is practically a synonym, or a scheduler "state machine" programming mode.)