Add State Manager

[shayanhabibi]

This will contain the Ward container which can have flags set to allow certain behaviours to be applied and observed by other threads holding the Ward.

I have implemented the basic structure of the Ward object and a Pausable flag/function.

More to follow

[shayanhabibi]

@disruptek can I get you to review the clearImpl in loony and see what you think? Does the logic make sense?

I am primarily concerned about the edge cases where other threads are cooperatively updating the queue nodes, interfering with that, and somehow messing with their reclamations or making them get stuck in a loop.

But maybe thats not an issue? see what you think.

After that everything is ready. Just needs to test. You will now be able to:

• Pause push or pop. If you access the looq with a ward in all other situations, then you will have a backchannel available by simply directly popping off the queue etc.
• Resume push or pop.
• Clear the queue.
• You can create wards that share the same looq and flag switches, but can choose to observe/affect different/same ones.
• Wards are ref objects which either accesses atomics or the loonyqueue ref which is only interacted with via atomics too. Therefore it should be safe to access from all threads.

Todo:

• Documentation
• Tests