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

[via libc-commits]

================
@@ -16,6 +16,28 @@
 namespace LIBC_NAMESPACE_DECL {
 namespace internal {
 
+/**
----------------
lntue wrote:

Can this comment use C++'s `//` to match other files' style?

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