Freeing of memory (garbage collection)

[Daniel White]

Thanks for that reply. I wonder if extending automatic garbage
collection for malloced memory would be a good idea...

> Only stuff like dynamic 
> arrays, AAs and new'ed stuff gets cleaned up by the GC.

For the above types of allocating memory, is there a way to 'lock' a
variable and say to D, "don't free this memory until I allow you to",
and also for it to allow you to free it manually when/if need be?