说明：  vxworks 由浅入深的介绍，完全由作者在深刻理解vxworks的基础上的抽象描述，简洁易懂，无论对初学者还是有一定经验的开发者都有参考价值。
(VxWorks easy-to-digest introduction, entirely by the author in a deep understanding of the basis of VxWorks abstract description, concise and understandable, both for beginners or have some experience in the development have a reference value.)