new trunk (base for 1.5)

windows build only

Foundation/include/Poco/RefCountedObject.h

@@ -0,0 +1,109 @@
+//
+// RefCountedObject.h
+//
+// $Id: //poco/1.4/Foundation/include/Poco/RefCountedObject.h#1 $
+//
+// Library: Foundation
+// Package: Core
+// Module:  RefCountedObject
+//
+// Definition of the RefCountedObject class.
+//
+// Copyright (c) 2004-2009, 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/AtomicCounter.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 AtomicCounter _counter;
+};
+
+
+//
+// inlines
+//
+inline int RefCountedObject::referenceCount() const
+{
+	return _counter.value();
+}
+
+
+inline void RefCountedObject::duplicate() const
+{
+	++_counter;
+}
+
+
+inline void RefCountedObject::release() const
+{
+	if (--_counter == 0) delete this;
+}
+
+
+} // namespace Poco
+
+
+#endif // Foundation_RefCountedObject_INCLUDED