Import libc++abi 10.0.1 release.

1 files changed, 30 insertions, 0 deletions

diff --git a/gnu/llvm/libcxxabi/src/include/atomic_support.h b/gnu/llvm/libcxxabi/src/include/atomic_support.h
index 6f9dbf43604..4ff45eb93ad 100644
--- a/gnu/llvm/libcxxabi/src/include/atomic_support.h
+++ b/gnu/llvm/libcxxabi/src/include/atomic_support.h
@@ -177,4 +177,34 @@ bool __libcpp_atomic_compare_exchange(_ValueType* __val,
 
 _LIBCPP_END_NAMESPACE_STD
 
+namespace {
+
+template <class IntType>
+class AtomicInt {
+public:
+  using MemoryOrder = std::__libcpp_atomic_order;
+
+  explicit AtomicInt(IntType *b) : b(b) {}
+  AtomicInt(AtomicInt const&) = delete;
+  AtomicInt& operator=(AtomicInt const&) = delete;
+
+  IntType load(MemoryOrder ord) {
+    return std::__libcpp_atomic_load(b, ord);
+  }
+  void store(IntType val, MemoryOrder ord) {
+    std::__libcpp_atomic_store(b, val, ord);
+  }
+  IntType exchange(IntType new_val, MemoryOrder ord) {
+    return std::__libcpp_atomic_exchange(b, new_val, ord);
+  }
+  bool compare_exchange(IntType *expected, IntType desired, MemoryOrder ord_success, MemoryOrder ord_failure) {
+    return std::__libcpp_atomic_compare_exchange(b, expected, desired, ord_success, ord_failure);
+  }
+
+private:
+  IntType *b;
+};
+
+} // end namespace
+
 #endif // ATOMIC_SUPPORT_H