LO / SO Amalgamation : A Technique for Constructing Programming Languages under Object - Oriented Operating Systems

This paper proposes a technique for constructing programming languages under object-oriented operating systems. Such operating systems consist of independent modules, so one can build exible systems and applications. However, traditional object-oriented operating systems provide users with system's object model (system object), so that programming language designers have to map their object model (language object) onto the system object model. In our proposed technique, called LO/SO amalgamation, language objects and system objects can be treated in a uniform fashion. So, it is now possible to specify system objects by using the rich programming environment supported by programming languages. Furthermore, message passing between two types of objects can be implemented e ciently by using our technique. In this paper, we present the concept of LO/SO amalgamation, and an evaluation of our prototype language, Apertos ConcurrentSmalltalk (ACST), which incorporates LO/SO amalgamation.