draft proposal for ref counting in D

[deadalnix]

Yes and no.

You obviously need to scan TL heaps at some point. When doing so 
you'll have a set of root that allow you to scan shared/immutable 
heap. What is going on in the TL heap become irrelevant once you 
have the root. And getting the roots from the TL heap is another 
problem altogether (any kind of GC can be used for that, stop the 
world, where the world is thread local, or another concurrent GC, 
the important point being that it is an independent problem).