delete the copy-constructor for cache as copying it is undesired behaviour

offloading-cacher/cache.hpp

@@ -237,6 +237,8 @@ namespace dsacache {
         std::unique_ptr<CacheData> GetFromCache(uint8_t* src, const size_t size, const int dst_node);
 
     public:
+        Cache(const Cache& other) = delete;
+
         // initializes the cache with the two policy functions
         // only after this is it safe to use in a threaded environment
         void Init(CachePolicy* cache_policy_function, CopyPolicy* copy_policy_function);