Natools

It's almost a break in abstraction, and it's unsafe to use when the reference can be accessed concurrently. However it might have some use in some context, to free the last reference when checked in a protected or thread-local context, to build a crude garbage collection system. file: [e77d1335d9] check-in: [610b834d9d] user: nat, branch: trunk, size: 5924 [annotate] [blame] [check-ins using] [diff]