Added SmartHandle.h

include/SmartHandle.h

@@ -0,0 +1,91 @@
+#ifndef SMARTHANDLE_H
+#define SMARTHANDLE_H
+
+/**
+ * Smart handle is like a smart pointer. It simply deletes the object on destruction using a custom deleter
+ * It differs from `std::unique_ptr` by that it doesn't expect a pointer
+ */
+template <typename T, typename Deleter>
+class SmartHandle
+{
+public:
+    typedef T value_type;
+    typedef Deleter deleter_function;
+private:
+    T _value;
+    Deleter _deleter;
+    bool _doDelete;
+    void _delete();
+public:
+    SmartHandle();
+    SmartHandle(T value, Deleter deleter);
+    SmartHandle(const SmartHandle& orig) = delete;
+    SmartHandle& operator=(const SmartHandle& orig) = delete;
+    SmartHandle(SmartHandle&& src);
+    ~SmartHandle();
+    T get() const;
+    void reset();
+    void reset(T value, Deleter deleter);
+};
+
+template <typename T, typename Deleter>
+SmartHandle<T,Deleter>::SmartHandle()
+{
+    this->_doDelete = 0;
+}
+
+template <typename T, typename Deleter>
+SmartHandle<T,Deleter>::SmartHandle(T value, Deleter deleter)
+{
+    this->_doDelete = 0;
+    this->reset(value,deleter);
+}
+
+template<typename T, typename Deleter>
+SmartHandle<T,Deleter>::SmartHandle(SmartHandle&& src)
+{
+    this->reset(src._value,src._deleter);
+    src._doDelete = 0;
+}
+
+template <typename T, typename Deleter>
+void SmartHandle<T,Deleter>::reset(T value, Deleter deleter)
+{
+    if(this->_doDelete) {
+        this->_delete();
+    }
+    this->_value   = value;
+    this->_deleter = deleter;
+    this->_doDelete = 1;
+}
+
+template <typename T, typename Deleter>
+void SmartHandle<T,Deleter>::reset()
+{
+    if(this->_doDelete) {
+        this->_delete();
+    }
+}
+
+template <typename T, typename Deleter>
+T SmartHandle<T,Deleter>::get() const
+{
+    return _value;
+}
+
+template <typename T, typename Deleter>
+void SmartHandle<T,Deleter>::_delete()
+{
+    _deleter(_value);
+    this->_doDelete = 0;
+}
+
+template <typename T, typename Deleter>
+SmartHandle<T,Deleter>::~SmartHandle()
+{
+    if(this->_doDelete) {
+        _delete();
+    }
+}
+
+#endif // SMARTHANDLE_H