Owen Anderson c778e8bf21 Add an Atomic.h to the System library, for providing a platform independent API
to low-level sync operations.

The only one present at the moment is MemoryFence(), and only for the platforms
for which I could easily discern the proper way to do it.  If your favorite platform
isn't represented, patches are welcome!

llvm-svn: 71770
2009-05-14 05:54:36 +00:00
..
2009-02-08 22:47:39 +00:00
2009-03-31 17:30:15 +00:00
2009-04-09 00:33:08 +00:00
2009-02-08 22:48:07 +00:00