Barrier is available as:
This model illustrates a design pattern with rendezvous called a "barrier synchronization." In this example, the two Ramps are sending increasing sequences of integers to the Displays. However, the transfer is constrained to occur only when both the Barrier actor and the Sleep actor read inputs. Thus, a multi-way rendezvous between the two Ramp actors, the two Display actors, the Barrier actor, and the Sleep actor constrains the two transfers to the Display actors to occur simultaneously. The Sleep actor will sleep a random amount of time after reading its input, and during that time will not accept additional inputs. Thus, after the first two (why two?) transfers to the Display actors the time between transfers is controlled by the Sleep actor.