Core

AwaitableCounter

A thread-safe counter that signals each time zero is crossed (in either direction) via a completion task. Can be used in hierarchies of counters.

EventQueueBase

An abstract base class that uses System.Threading.Channels to implement a single threaded consumer of events.

ExecutionQueue

A derivation of EventQueueBase. Events are IExecutable. Execute() is called for each event.

EventProcessor

A derivation of EventQueueBase. Events are passed to a provided implementation of IEventHandler.

StateMachine

A derivation of EventQueueBase. Each event and current state are passed to a provided implementation of IStateEventHandler which returns updated state.

Sequencer

Based on System.Threading.Channels, a scheduler that coordinates the execution of synchronous and asynchronous tasks using a hierarchical key that defines their relative concurrency. For example, if tasks are dispatched sequentially with the following hierarchical keys:

1. A
2. B
3. A.X
4. A.Y
5. A

then:

• tasks 1 and 2 will run in parallel;
• tasks 3 and 4 will both run in parallel after task 1 ends;
• task 5 will run after both tasks 3 and 4 end.