[PATCH] D19271: Change CALL_ONCE_INITIALIZATION implementation to use static initialization

[Reid Kleckner via llvm-commits]

rnk added a comment.

If we're going to suffer ifdefs, we should just use InitOnceExecuteOnce on the Windows side. I trust it more than this code.

We try not to let LLVM headers transitively pollute the world with windows.h macros, so we would need to have our own definitions of `union _RTL_RUN_ONCE` and the `InitOnceExecuteOnce` prototype.


http://reviews.llvm.org/D19271