Bridging CSP and C++ with Selective Formalism and Executable Specifications

Authors:
W. B. Gardner
Affiliations:
-
Venue:
MEMOCODE '03 Proceedings of the First ACM and IEEE International Conference on Formal Methods and Models for Co-Design
Year:
2003

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Abstract

CSP (Communicating Sequential Processes) is a usefulalgebraic notation for creating a hierarchical behaviouralspecification for concurrent systems, due to its formalinterprocess synchronization and communication semantics.CSP specifications are amenable to simulation andformal verification by model-checking tools. To overcomethe drawback that CSP is neither a full-featured nor popularprogramming language, an approach called "selectiveformalism" allows the use of CSP to be limited to specifyingthe control portion of a system, while the rest of itsfunctionality is supplied in the form of C++ modules.These are activated through association with abstractevents in the CSP specification. The target system is constructedusing a framework called CSP++, which automaticallytranslates CSP specifications into C++, therebymaking CSP directly executable. Thus a bridge is built thatallows a formal method to be combined with a popularprogramming language. It is believed that this methodologycan be extended to hardware/software codesign.