Entwurf und Implementierung von CSSA - Beschreibung der Sprache, des Compilers und des Mehrrechnersimulationssystems : Teil A: Konzepte

Abstract

CSSA (Computing System for Societies of Agents) is an interactive programming language for asynchronous multiprocessor systems. Computations are done by concurrently working sequential modules, called agents which implement objects of data and control abstractions. Communication is done by passing messages to acquainted agents. The receiving agent creates an instance of an operation capability referred to in the message. Since agents can be created during the computation and acquaintances can be transmitted in messages the heterarchical agent-net may dynamically change. The CSSA-language has been successfully implemented for a multiprocessor simulation system running on a general purpose computer. This system allows the execution of CSSA-applications on a wide range of simulated multicomputer configurations. This volume gives an overview of the language concepts and design criteria of CSSA. Some major concepts of compiler construction used in the implementation are also discussed. A practical automatic error recovery method for LL(1)-parsers is described in the appendix. After a short description of the user-interface, the menuedriven program development system and the interactive debugger follows a detailed discussion of the multiprocessor simulation system. Other volumes of the CSSA-documentation-contain the language reference manual, the user's guide, programming examples and the system documentation.