mozilla/rust — pull request #6387 by brson (2013-05-10 06:57:26+00:00)
Title: Cleanup unsafe synchronization primitives in core

r?

* Move `SharedMutableState`, `LittleLock`, and `Exclusive` from `core::unstable` to `core::unstable::sync`
* Modernize the `SharedMutableState` interface with methods
* Rename `SharedMutableState` to `UnsafeAtomicRcBox` to match `RcBox`.