add atReferenceCounter (#137)

classes.cpp

@@ -139,6 +139,7 @@
 #include "player/CPlayerAngles.hpp"
 #include "player/CPlayerInfo.hpp"
 #include "rage/atArray.hpp"
+#include "rage/atReferenceCounter.hpp"
 #include "rage/atSingleton.hpp"
 #include "rage/joaat.hpp"
 #include "rage/rlGamerHandle.hpp"

rage/atReferenceCounter.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "../base/datBase.hpp"
+
+namespace rage
+{
+    class atReferenceCounter : public datBase
+    {
+    public:
+        atReferenceCounter() : m_ref_count(0) {}
+        
+        void AddReference() {
+            m_ref_count++;
+        }
+
+        void ReleaseReference() {
+            m_ref_count--;
+            if(m_ref_count == 0) {
+                delete this;
+            }
+        }
+
+        int GetReferenceCount() const {
+            return m_ref_count; 
+        }
+
+    private:
+        int m_ref_count;  // 0x0000
+    };
+}