Index: openmp/libomptarget/include/Utilities.h
===================================================================
--- openmp/libomptarget/include/Utilities.h
+++ openmp/libomptarget/include/Utilities.h
@@ -19,6 +19,7 @@
 #include "Debug.h"
 
 #include <algorithm>
+#include <atomic>
 #include <cassert>
 #include <cstdint>
 #include <cstdlib>
@@ -129,6 +130,34 @@
 using StringEnvar = Envar<std::string>;
 using BoolEnvar = Envar<bool>;
 
+/// Utility class for thread-safe reference counting. Any class that needs
+/// objects' reference counting can inherit from this entity or have it as a
+/// class data member. Do not assume any memory order guarantees with other
+/// memory operations; the atomic updates of this class operate with relaxed
+/// memory order.
+template <typename Ty = uint32_t> struct RefCountTy {
+  /// Create a refcount object initialized to zero.
+  RefCountTy() : Refs(0) {}
+
+  ~RefCountTy() { assert(Refs == 0 && "Destroying with non-zero refcount"); }
+
+  /// Increase the reference count atomically.
+  void increaseRefCount() { Refs.fetch_add(1, std::memory_order_relaxed); }
+
+  /// Decrease the reference count and return whether it became zero. Decreasing
+  /// the counter in more units than it was previously increased results in
+  /// undefined behavior.
+  bool decreaseRefCount() {
+    Ty Prev = Refs.fetch_sub(1, std::memory_order_relaxed);
+    assert(Prev > 0 && "Invalid refcount");
+    return (Prev == 1);
+  }
+
+private:
+  /// The atomic reference counter.
+  std::atomic<Ty> Refs;
+};
+
 template <>
 inline bool StringParser::parse(const char *ValueStr, bool &Result) {
   std::string Value(ValueStr);