Rendezvous with ADA

Abstract

A fragment of ADA abstracting the communication and synchronization part is studied. An operational semantics for this fragment is given, emphasizing the justice and fairness aspects of the selection mechanisms. An appropriate notion of fairness is shown to be equivalent to the explicit entry-queues proposed in the reference manual. Proof rules for invariance and liveness properties are given and illustrated on an example. The proof rules are based on temporal logic.