Abstract
This paper presents a real time distributed operating system modeled as an abstract machine which provides all distributed processes with the same set of application services. The proposed executive, KerDX, is dedicated to embedded systems, designed according to the kernel + agencies approach of SCEPTRE standard and complies with the OSI application layer structure standard (IS09545). KerDX supports 3 classes of services: 1) services realized according to the client/server model defined in MMS standard; 2) services which realization requires the cooperating processes to invoke specific services manipulating the same object (event, mailbox…); 3) direct inter-process communication based on the rendez-vous concept. This paper is concerned with the last 2 classes. First, we give the specification of Event Management services in which 3 classes of events are defined, then we present our communication mechanism, Kernet, an extension of Hoare's CSP and supporting ADA's rendez-vous concept. A generic approach is proposed by splitting the rendez-vous into its 2 elementary phases (establishment and conclusion).
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