1 files changed, 38 insertions, 0 deletions
diff --git a/tests/unit_tests/unit_tests_utils.h b/tests/unit_tests/unit_tests_utils.h
new file mode 100644
index 000000000..9eebb7ed9
--- /dev/null
+++ b/tests/unit_tests/unit_tests_utils.h
@@ -0,0 +1,38 @@
+// Copyright (c) 2012-2013 The Cryptonote developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#pragma once
+
+#include <atomic>
+
+namespace unit_test
+{
+  class call_counter
+  {
+  public:
+    call_counter()
+      : m_counter(0)
+    {
+    }
+
+    void inc() volatile
+    {
+      // memory_order_relaxed is enough for call counter
+      m_counter.fetch_add(1, std::memory_order_relaxed);
+    }
+
+    size_t get() volatile const
+    {
+      return m_counter.load(std::memory_order_relaxed);
+    }
+
+    void reset() volatile
+    {
+      m_counter.store(0, std::memory_order_relaxed);
+    }
+
+  private:
+    std::atomic<size_t> m_counter;
+  };
+}