Module rustasim::engine

Drives the simulation

This module implements (almost) all that is needed for a conservative event-driven simulation.

The main ideas behind a conservative scheduling approach is to return all events to the actor in a monotonically increasing fashion. In order to do this without risking later on returning an event that would break causality, we need to wait to hear from all our neighbours. This sometimes causes a deadlock when two (or more) neighbours are waiting on each other.

In order to resolve the deadlock, one can send "null-messages". Essentially telling neighbours that we have nothing to do. Fundamentally this is an actor-level action: there is no way the simulation engine knows enough about the simulation model to know which neighbours have to hear from us, or how long in the future it is safe for them to advance. Therefore the engine returns a "Stalled" event type at which point the actor must update all relevant neighbours in order for the simulation to progress.

Structs

Event	Fully describes an event.
Merger	Manages the input queues and returns the next Event to be processed.

Enums

EventType

Event types and their associated data.