%T A Unifying Theory of True Concurrency Based on CSP and Lazy Observation
%A Marc L. Smith
%E Jan F. Broenink, Herman Roebbers, Johan P. E. Sunter, Peter H. Welch, David C. Wood
%B Communicating Process Architectures 2005
%X What if the CSP observer were lazy? This paper considers the
consequences of altering the behavior of the CSP observer.
Specifically, what implications would this new behavior have
on CSP&\[sh]8217;s traces? Laziness turns out to be a
useful metaphor. We show how laziness permits transforming
CSP into a model of true concurrency (i.e., non\-interleaved
trace semantics). Furthermore, the notion of a lazy observer
supports tenets of view\-centric reasoning (VCR): parallel
events (i.e., true concurrency), multiple observers (i.e.,
different views), and the possibility of imperfect
observation. We know from the study of programming languages
that laziness is not necessarily a negative quality; it
provides the possibility of greater expression and power in
the programswe write. Similarly, within the context of the
Unifying Theories of Programming, a model of true
concurrency&\[sh]8212; VCR &\[sh]8212; becomes
possible by permitting (even encouraging) the CSP observer
to be lazy.
If you have any comments on this database, including inaccuracies, requests to remove or add information, or suggestions for improvement, the WoTUG web team are happy to hear of them. We will do our best to resolve problems to everyone's satisfaction.
Copyright for the papers presented in this database normally resides with the authors; please contact them directly for more information. Addresses are normally presented in the full paper.
Pages © WoTUG, or the indicated author. All Rights Reserved.
Comments on these web pages should be addressed to: www at wotug.org