intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 27 insertions, 0 deletions

diff --git a/library/cpp/messagebus/use_count_checker.h b/library/cpp/messagebus/use_count_checker.h
new file mode 100644
index 0000000000..70bef6fa8a
--- /dev/null
+++ b/library/cpp/messagebus/use_count_checker.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <util/generic/refcount.h>
+
+class TUseCountChecker {
+private:
+    TAtomicCounter Counter;
+
+public:
+    TUseCountChecker();
+    ~TUseCountChecker();
+    void Inc();
+    void Dec();
+};
+
+class TUseCountHolder {
+private:
+    TUseCountChecker* CurrentChecker;
+
+public:
+    TUseCountHolder();
+    explicit TUseCountHolder(TUseCountChecker* currentChecker);
+    TUseCountHolder& operator=(TUseCountHolder that);
+    ~TUseCountHolder();
+    void Swap(TUseCountHolder&);
+    void Reset();
+};