一种基于构件的嵌入式实时软件框架  

A Component-Based Real-Time Software Framework

作　　者：古幼鹏[1] 桑楠[1] 熊光泽[1] 覃志东[1] 

机构地区：[1]电子科技大学计算机科学与工程学院,成都610054

出　　处：《计算机科学》2004年第12期173-178,共6页Computer Science

基　　金：863基金(2003AA1Z2210);电子科技大学青年基金(L08010601YF020806)

摘　　要：嵌入式实时软件面临着规模大、复杂性高而开发周期相对较短,必须具备可定制和演化的能力等挑战,因此一个重用性高、扩展性和维护性好的软件框架显得非常必要。本文提出了一种基于构件的实时软件框架CBRTSF,它在其实时构件模型RTC的接口中显式定义了构件需要的服务——输入方法,并将接口中的每个方法赋予优先级特性。在此基础上,利用方法连接来描述构件间的交互,采用基于方法连接的可抢占优先级调度算法,从而得到一个全构件化的实时软件框架。最后,我们举了CBRTSF的一个应用例子,并将CBRTSF与相关研究工作进行了比较分析,说明了CBRTSF在满足系统实时性、重用性、扩展性和维护性方面具有较大的优势。Developing rapidly, customization and scalable ability are the requirements of real-time software. To satisfy these requirements, a class of component-based real-time software framework, called CBRTSF, is presented in this paper. First, we design a RTC (real-time component) model in which a method of interface was assigned priority. In RTC model, those methods that are used in a component but are provided by other components are also defined in the interface of this component. Then we introduce a scheduling algorithm that schedules methods of components according to their priority, and we define method links to express component interconnection. Finally, we conclude that CBRTSF has more advantages of software reusability, scalable ability and maintenance ability, compared with related work.

关 键 词：嵌入式实时软件 重用性 构件 优先级 接口 扩展性 软件框架 服务 开发周期 规模 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TP393[自动化与计算机技术—计算机科学与技术]