- /** Extend an Extensible class.
- *
- * @param key The key parameter is an arbitary string which identifies the extension data
- *
- * You must provide a key to store the data as via the parameter 'key', this single-parameter
- * version takes no 'data' parameter, this is used purely for boolean values.
- * The key will be inserted into the map with a NULL 'data' pointer. If the key already exists
- * then you may not insert it twice, Extensible::Extend will return false in this case.
- *
- * @return Returns true on success, false if otherwise
- */
- bool Extend(const std::string &key)
- {
- /* This will only add an item if it doesnt already exist,
- * the return value is a std::pair of an iterator to the
- * element, and a bool saying if it was actually inserted.
- */
- return this->Extension_Items.insert(std::make_pair(key, (char*)NULL)).second;
- }
+/** The base class for inspircd classes that support reference counting.
+ * Any objects that do not have a well-defined lifetime should inherit from
+ * this, and should be assigned to a reference<type> object to establish their
+ * lifetime.
+ *
+ * Reference objects should not hold circular references back to themselves,
+ * even indirectly; this will cause a memory leak because the count will never
+ * drop to zero.
+ *
+ * Using a normal pointer for the object is recommended if you can assure that
+ * at least one reference<> will remain as long as that pointer is used; this
+ * will avoid the slight overhead of changing the reference count.
+ */
+class CoreExport refcountbase
+{
+ mutable unsigned int refcount;
+ public:
+ refcountbase();
+ virtual ~refcountbase();
+ inline unsigned int GetReferenceCount() const { return refcount; }
+ static inline void* operator new(size_t, void* m) { return m; }
+ static void* operator new(size_t);
+ static void operator delete(void*);
+ inline void refcount_inc() const { refcount++; }
+ inline bool refcount_dec() const { refcount--; return !refcount; }
+ private:
+ // uncopyable
+ refcountbase(const refcountbase&);
+ void operator=(const refcountbase&);
+};