Study Cards on state, events, event
New events cannot interrupt the processing of the current event and must be stored (in an EVENT POOL) until the state machine becomes idle again.
What this means is that each state machine continues processing until it reaches a WAIT POINT, when it is eligible to accept new events.
Once a wait point is reached, the events in the EVENT POOL are evaluated to see if the state machine is currently waiting on them for some transition. (The pool is usually thought of as an EVENT QUEUE).
It then stops at the next wait point, where the cycle continues again.
The sequence of behaviors between wait points is called a State Machine STEP.
They will need to be resent to the state machines for them to be considered.
The order the events are examined from the pool is not specified, though the pool is usually considered an EVENT QUEUE.
However, because completion events have priority, they will be dispatched ahead of any other events in the pool.
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