first comit

KArcCache/KArcCacheNode.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <memory>
+
+namespace KamaCache 
+{
+
+template<typename Key, typename Value>
+class ArcNode 
+{
+private:
+    Key key_;
+    Value value_;
+    size_t accessCount_;
+    std::weak_ptr<ArcNode> prev_;
+    std::shared_ptr<ArcNode> next_;
+
+public:
+    ArcNode() : accessCount_(1), next_(nullptr) {}
+    
+    ArcNode(Key key, Value value) 
+        : key_(key)
+        , value_(value)
+        , accessCount_(1)
+        , next_(nullptr) 
+    {}
+
+    // Getters
+    Key getKey() const { return key_; }
+    Value getValue() const { return value_; }
+    size_t getAccessCount() const { return accessCount_; }
+    
+    // Setters
+    void setValue(const Value& value) { value_ = value; }
+    void incrementAccessCount() { ++accessCount_; }
+
+    template<typename K, typename V> friend class ArcLruPart;
+    template<typename K, typename V> friend class ArcLfuPart;
+};
+
+} // namespace KamaCache