A Petri Net Based Modeling of Active Objects and Futures

Creators: de Boer, Frank; Bravetti, Mario; Lee, Matias; Zavattaro, Gianluigi

Others:: Centrum Wiskunde & Informatica (CWI); Foundations of Component-based Ubiquitous Systems (FOCUS) ; Inria Sophia Antipolis - Méditerranée (CRISAM) ; Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Dipartimento di Informatica - Scienza e Ingegneria [Bologna] (DISI) ; Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO); Universidad Nacional de Córdoba [Argentina]; Department of Computer Science and Engineering [Bologna] (DISI) ; Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO)

Description

We give two different notions of deadlock for systems based on active objects and futures. One is based on blocked objects and conforms with the classical definition of deadlock by Coffman, Jr. et al. The other one is an extended notion of deadlock based on blocked processes which is more general than the classical one. We introduce a technique to prove deadlock freedom of systems of active objects. To check deadlock freedom an abstract version of the program is translated into Petri nets. Extended deadlocks, and then also classical deadlock, can be detected via checking reachability of a distinct marking. Absence of deadlocks in the Petri net constitutes deadlock freedom of the concrete system.

Abstract

International audience

A Petri Net Based Modeling of Active Objects and Futures

Description

Abstract

Additional details