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deadlock-freedom

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8 - Properties of Choreographies and Endpoint Projection
from Part II - Computation
Fabrizio Montesi, University of Southern Denmark
Book:

Introduction to Choreographies

Published online:

11 May 2023

Print publication:

25 May 2023, pp 156-176
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Summary

We study the properties of Recursive Choreographies and its related notion of EPP in depth. Endpoint projection is proven to guarantee choreography compliance and communication safety in this setting. Starvation-freedom does not hold anymore in general, due to the possibilities opened by general recursion in Recursive Choreographies, but it holds for the tail-recursive fragment of the language. Under some reasonable assumptions, the weaker property of deadlock-freedom holds for any implementation returned by EPP. That is, the EPP of a choreography never gets stuck.