Some other languages realize a simple variant of the Actor model: the body of an object is executed sequentially and assignments may be used within the body but messages are buffered and may not be received during "intermediate" states of an object.
If an asynchronous communication model is used, as in the primitive Actor model (see section entitled "The Actor Model"), then customers representing return addresses must be explicitly supplied.
These computers realize an idealized actor machine with fine-grain concurrent structure inherent in the functional form of an actor's behavior; in turn the Actor model is well-suited to programming them (for example, see ).
We shall concentrate on constructs that are unique to the Actor model. The translation uses, for each syntactic category, a mapping [*] from the Actor grammar to PPC process-terms.
In the actor model the create primitive is endowed with an implicit capability of generating globally unique actor addresses on a purely local basis.
As we mentioned before, the guarantee of message delivery in the Actor model forms a type of fairness assumption .
The Actor model is one of the earliest proposed paradigms of object-based concurrent computation.
In contrast with all the related work on Actors, our approach gives a comprehensive process-algebraic interpretation of all the basic features of the Actor Model for the first time.