Mach操作系统进程间通讯机制的设计与实现

目的研制国产嵌入式实时操作系统ＣＯＳＩＸＶ２．０／ＲＴ开发平台，对基于面向对象技术Ｍａｃｈ操作系统进程间通信机制ＩＰＣ进行了分析，方法端口在ＭａｃｈＩＰＣ中占有极其重要的位置，它不仅是消息传递的通道，而且是Ｍａｃｈ系统中各种实体的一种抽象。从端口生成过程将端口划分为系统端口、特权端口．用户端口以及核心端口，分析了各类端口功能以及在系统中产生、运行、＊消亡的过程，分析了端口间消息通信ＩＰＣ。结果ＭａｃｈＩＰＣ广泛应用在Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ运行环境中，消息中打包、解包过程势必对ＩＰＣ的执行效率有制约作用。结论将部分系统调用函数改写，用陷入方式在核心直接实现，提高ＩＰＣ的执行效率，从而提高整个系统执行效率，以满足实时系统的设计目标。

The Design and Implementation of IPCMechanism in Mach Operating System

Aim To design the home -made embedded real time operating system COSIX V2.O/RT developing platform,the Mach operating system interprocess communication mech- anism based on object-oriented technique was analyzed. Methods Not only being the trans-mission channel,but also being the abstract of all the entity in the Mach operating system.ports play the most important role in Mach IPC(interprocess communication).Ports were de-vided into 4 types: system ports, privileged ports user ports and kernel ports.All these ports'creation,run and kill processes and the message transmission in IPC were analyzed.ResultsMach IPC has been widely used in Client/Server run environment.Packing and unpacking inmessage transmission must restrict the run efficiency of IPC Conclusion To enhance IPC runefficiency and at the same time enhance the operating system's run efficiency,some of thesystem calls should be rewritten and implemented with trapped mode in kernel.In the end the aim of designing real time operating system is achieved.