Adding Recursion to Dpi

  • Authors:

  • Samuel Hym;Matthew Hennessy

  • Affiliations:

  • PPS, Université Paris 7 & CNRS;Department of Informatics, University of Sussex

  • Venue:
  • Electronic Notes in Theoretical Computer Science (ENTCS)
  • Year:
  • 2006

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Abstract

Dpi is a distributed version of the pi-calculus, in which processes are explicitly located, and a migration construct may be used for moving between locations. We argue that adding a recursion operator to the language increases significantly its descriptive power. But typing recursive processes requires the use of potentially infinite types. We show that the capability-based typing system of Dpi can be extended to co-inductive types so that recursive processes can be successfully supported. We also show that, as in the pi-calculus, recursion can be implemented via iteration. This translation improves on the standard ones by being compositional but still comes with a significant migration overhead in our distributed setting.