[PATCH] D66313: Re-introduce the RWMutexImpl for macOS < 10.12

[Alex Lorenz via Phabricator via llvm-commits]

arphaman accepted this revision.
arphaman added a comment.
This revision is now accepted and ready to land.

It's not pretty, but it fixes the issue. We will need a better story for other partially available symbols when we'll be moving over to C++17.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D66313/new/

https://reviews.llvm.org/D66313