[libc-commits] [libc] [libc] Add Darwin mutex support via os_sync primitives (PR #167722)

[Schrodinger ZHU Yifan via libc-commits]

https://github.com/SchrodingerZhu requested changes to this pull request.

Hi, as I said in my previous comment, some of my question may be due to confusion of the stacking layer. 

Thank you for the patch! Looking forward to get this landed. After your refactoring, I guess it will also make it easier for me to add the windows counter parts (using WaitOnAddress).

https://github.com/llvm/llvm-project/pull/167722