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0929ab577d
This is an attempt to enforce better separation between ComputerThread
and ComputerExecutor. Both of these classes are pretty complex in their
own right, and the way the two bleed into each other makes it all the
more confusing!
This effectively splits the ComputerExecutor into two separate classes:
- ComputerScheduler.Executor (with the actual implementation inside
ComputerThread): This holds all the ComputerThread-related logic
which used to be in ComputerExecutor, including:
- before/after work hooks
- is-on-thread tracking
- virtual runtime computation
- ComputerScheduler.Worker: This encapsulates all the computer-related
behaviour. The actual implementation remains in ComputerExecutor.
The boundaries are still a little fuzzy here, and it's all definitely
more coupled then I'd like, but still an improvement!
There are several additional changes at the same time:
- TimeoutState has also been split up, to better define the boundary
between consumers (such as ComputerExecutor and ILuaMachine) and
controllers (ComputerThread).
The getters still live in TimeoutState, but the core logic lives in
ManagedTimeoutState.
- We no longer track cumulative time in the TimeoutState. Instead, we
allow varying the timeout of a computer. When a computer is paused,
we store the remaining time, and restore it when resuming again.
This also allows us give a longer timeout for computer
startup/shutdown, hopefully avoiding some of those class-not-found
issues we've seen.
- We try to make the state machine of how ComputerExecutors live on the
queue a little more explicit. This is very messy/confusing -
something I want to property test in the future.
I'm sure there's more to be done here, especially in ComputerExecutor,
but hopefully this makes future changes a little less intimidating.