intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 31 insertions, 0 deletions

diff --git a/library/cpp/messagebus/use_after_free_checker.h b/library/cpp/messagebus/use_after_free_checker.h
new file mode 100644
index 0000000000..590b076156
--- /dev/null
+++ b/library/cpp/messagebus/use_after_free_checker.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <util/system/platform.h>
+#include <util/system/types.h>
+
+class TUseAfterFreeChecker {
+private:
+    ui64 Magic;
+
+public:
+    TUseAfterFreeChecker();
+    ~TUseAfterFreeChecker();
+    void CheckNotFreed() const;
+};
+
+// check twice: in constructor and in destructor
+class TUseAfterFreeCheckerGuard {
+private:
+    const TUseAfterFreeChecker& Check;
+
+public:
+    TUseAfterFreeCheckerGuard(const TUseAfterFreeChecker& check)
+        : Check(check)
+    {
+        Check.CheckNotFreed();
+    }
+
+    ~TUseAfterFreeCheckerGuard() {
+        Check.CheckNotFreed();
+    }
+};