We can just synchronise on all of the map data accesses, but
this means we need to be careful about ensuring that no
sync loads occur, otherwise we could block other threads for
long periods of time.
Namely, everything after FEATURES. By creating a dependency
chain indicating what chunks are in use, we can safely
schedule completely independent tasks in parallel. This
will allow the chunk system to scale beyond 10 threads
per world.
Currently this patch needs some more testing.
The simple solution is that we ignore entities/positions that are not
in the current region. Making retrieval of items in inventory
thread-safe is not going to happen.
This is so that it may be accessed concurrently
from many regions.
Additionally, make sure it does not leak memory by limiting
the number of entries it will cache.
Now, all of the sleep status changes are pushed to the global
tick thread. Had to modify the wake up all players routine
to use the task scheduler to ensure the player is woken up
on the right region context.
Fix erroring while crashing on the global tick thread due to
region field being null.
Now, the spawning should be running Vanilla logic; except
that it is calculated per region (which is what per player
was effectively achieving anyways).
Will be removed later once this is all public.
Fixed many issues with teleporting players on vehicles
while in the same region.
Additionaly, make sure dead players are dismounted - as
this logic was previously done by remove.
Re-add regiontodo.txt
Because game time is now on the global tick thread, we no longer
need adjustments for any block entity. But, just in case we do
updateTicks functions now.
