Registering-unregistering threads

[solidstate1991]

I'm doing some audio-related work, and one thing I need is to 
unregister from (and maybe later temporarily re-register to) the 
GC, since it would cause some issues, and it would be nice if I 
still could use the GC during disk operations, etc.

Info on it is quite scarce and a bit confusing. If I unregister 
from the RT, will that mean it'll be GC independent, or will have 
other consequences too?