llvm-project

3c97829d - [libc] Add Darwin mutex support via os_sync primitives (#167722)

[libc] Add Darwin mutex support via os_sync primitives (#167722) This patch implements the generic mutex and raw_mutex interfaces on macOS. A new Futex class is provided that relies on os_sync_wait and os_sync_wake to emulate futex‑like wait and wake semantics. The OS‑specific part is moved into futex_utils, which now contains the Darwin implementation.