just_the_locking_wrapper.h

 template <class T> class Locking
 {
     T _data;
     mutable std::recursive_mutex _mtx;
 
     /* Define call proxy here */
 
   public:
     template <class U> Locking(U &&data) : _data(std::forward<U>(data))
     {   
     }   
 
     CallProxy<T> operator->()
     {   
         _mtx.lock();
         return CallProxy<T>(&_data, _mtx);
     }   
 };