[libcxx-commits] [libcxx] [libcxx] Implementation of P1831R1 (PR #101439)

[Mark de Wever via libcxx-commits]

================
@@ -27,6 +27,19 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+#if _LIBCPP_STD_VER >= 20
+#  define _LIBCPP_DEPRECATED_NOT_ALWAYS_LOCK_FREE                                                                      \
+    [[deprecated("volatile atomic operations are deprecated when std::atomic<T>::is_always_lock_free is false")]]
+#else
+#  define _LIBCPP_DEPRECATED_NOT_ALWAYS_LOCK_FREE
+#endif
+
+template <class _Tp, bool always_lock_free>
----------------
mordante wrote:

```suggestion
template <class _Tp, bool __always_lock_free>
```

https://github.com/llvm/llvm-project/pull/101439