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The Computer Journal 1994 37(5):399-406; doi:10.1093/comjnl/37.5.399
© 1994 by British Computer Society
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Interference Control in Superpascal—A Block-Structured Parallel Language

P. B. Hansen *

School of Computer and Information Science, Syracuse University, Syracuse, NY 13244, USA

Process interference due to shared variables is a serious problem in parallel programs written in insecure programming languages. The only effective remedy has been known since the 1970s: a parallel programming language must be designed to permit detection of process interference during compilation. This sound principle has seldom been adopted and enforced consistently for block-structured parallel languages. This paper discusses syntactic control of interference in SuperPascal, a block-structured programming language for parallel scientific computing. SuperPascal omits the insecure concepts of Pascal, and adds parallel statements and synchronous communication channels. Restrictions on the use of variables permit a single-pass compiler to check that parallel processes are disjoint, even if they use procedures with global variables.

Received November 1993. revised May 1994.

* School of Computer and Information Science, Syracuse University, Syracuse, NY 13244, USA


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