// // RefCountedObject.h // // $Id: //poco/svn/Foundation/include/Poco/RefCountedObject.h#2 $ // // Library: Foundation // Package: Core // Module: RefCountedObject // // Definition of the RefCountedObject class. // // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. // and Contributors. // // Permission is hereby granted, free of charge, to any person or organization // obtaining a copy of the software and accompanying documentation covered by // this license (the "Software") to use, reproduce, display, distribute, // execute, and transmit the Software, and to prepare derivative works of the // Software, and to permit third-parties to whom the Software is furnished to // do so, all subject to the following: // // The copyright notices in the Software and this entire statement, including // the above license grant, this restriction and the following disclaimer, // must be included in all copies of the Software, in whole or in part, and // all derivative works of the Software, unless such copies or derivative // works are solely in the form of machine-executable object code generated by // a source language processor. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. // #ifndef Foundation_RefCountedObject_INCLUDED #define Foundation_RefCountedObject_INCLUDED #include "Poco/Foundation.h" #include "Poco/Mutex.h" namespace Poco { class Foundation_API RefCountedObject /// A base class for objects that employ /// reference counting based garbage collection. /// /// Reference-counted objects inhibit construction /// by copying and assignment. { public: RefCountedObject(); /// Creates the RefCountedObject. /// The initial reference count is one. void duplicate() const; /// Increments the object's reference count. void release() const; /// Decrements the object's reference count /// and deletes the object if the count /// reaches zero. int referenceCount() const; /// Returns the reference count. protected: virtual ~RefCountedObject(); /// Destroys the RefCountedObject. private: RefCountedObject(const RefCountedObject&); RefCountedObject& operator = (const RefCountedObject&); mutable int _rc; mutable FastMutex _rcMutex; }; // // inlines // inline int RefCountedObject::referenceCount() const { return _rc; } } // namespace Poco #endif // Foundation_RefCountedObject_INCLUDED