(svn r23880) -Add: A simple smart pointer.

src/core/alloc_type.hpp

@@ -180,4 +180,38 @@ public:
 	inline void operator delete[](void *ptr) { free(ptr); }
 };
 
+/**
+ * A smart pointer class that free()'s the pointer on destruction.
+ * @tparam T Storage type.
+ */
+template <typename T>
+class AutoFreePtr
+{
+	T *ptr; ///< Stored pointer.
+
+public:
+	AutoFreePtr(T *ptr) : ptr(ptr) {}
+	~AutoFreePtr() { free(this->ptr); }
+
+	/**
+	 * Take ownership of a new pointer and free the old one if needed.
+	 * @param ptr NEw pointer.
+	 */
+	inline void Assign(T *ptr)
+	{
+		free(this->ptr);
+		this->ptr = ptr;
+	}
+
+	/** Dereference pointer. */
+	inline T *operator ->() { return this->ptr; }
+	/** Dereference pointer. */
+	inline const T *operator ->() const { return this->ptr; }
+
+	/** Cast to underlaying regular pointer. */
+	inline operator T *() { return this->ptr; }
+	/** Cast to underlaying regular pointer. */
+	inline operator const T *() const { return this->ptr; }
+};
+
 #endif /* ALLOC_TYPE_HPP */