Engine directory for ticket #1

Engine/lib/collada/include/dae/daeSmartRef.h

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+/*
+ * Copyright 2006 Sony Computer Entertainment Inc.
+ *
+ * Licensed under the SCEA Shared Source License, Version 1.0 (the "License"); you may not use this 
+ * file except in compliance with the License. You may obtain a copy of the License at:
+ * http://research.scea.com/scea_shared_source_license.html
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License 
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
+ * implied. See the License for the specific language governing permissions and limitations under the 
+ * License. 
+ */
+
+#ifndef __DAE_SMARTREF_H__
+#define __DAE_SMARTREF_H__
+
+#include <assert.h>
+#include <dae/daeRefCountedObj.h>
+
+/**
+ * The @c daeSmartRef template class automates reference counting for
+ * objects derived from @c daeRefCountedObj.
+ */
+template<class T> class daeSmartRef
+{
+public:
+	/**
+	 * Constructor
+	 */
+	inline daeSmartRef() : _ptr(NULL) { }
+
+	/**
+	 * Destructor
+	 */
+	inline ~daeSmartRef() {
+		checkedRelease(_ptr);
+	}
+
+	/**
+	 * Copy Constructor that will convert from one template to the other.
+	 * @param smartRef a daeSmartRef to the object to copy from.
+	 */
+	template<class U>
+	inline daeSmartRef(const daeSmartRef<U>& smartRef) : _ptr(smartRef.cast()) {
+		checkedRef(_ptr);
+	}
+
+	/**
+	 * Function that returns a pointer to object being reference counted.
+	 * @return the object being reference counted.
+	 */
+	inline T* cast() const { return _ptr; }
+
+	/**
+	 * Copy Constructor.
+	 * @param smartRef a daeSmartRef of the same template type to copy from
+	 */
+	inline daeSmartRef(const daeSmartRef<T>& smartRef) : _ptr(smartRef._ptr) {
+		checkedRef(_ptr);
+	}
+
+	/**
+	 * Constructor
+	 * @param ptr a pointer to an object of the same template type.
+	 */
+	inline daeSmartRef(T* ptr) : _ptr(ptr) {
+		checkedRef(_ptr);
+	}
+
+	/**
+	 * Overloaded assignment operator which will convert between template types.
+	 * @param smartRef a daeSmartRef to the object to copy from.
+	 * @return Returns a reference to this object.
+	 */
+	template<class U>
+	inline const daeSmartRef<T>& operator=(const daeSmartRef<U>& smartRef) {
+		T* ptr = smartRef.cast();
+		checkedRef(ptr);
+		checkedRelease(_ptr);
+		_ptr = ptr;
+		return *this; }
+
+	/**
+	 * Overloaded assignment operator.
+	 * @param other a daeSmartRef to the object to copy from.  Must be of the same template type.
+	 * @return Returns a reference to this object.
+	 */
+	inline const daeSmartRef<T>& operator=(const daeSmartRef<T>& other) {
+		T* ptr = other._ptr;
+		checkedRef(ptr);
+		checkedRelease(_ptr);
+		_ptr = ptr;
+		return *this; }
+
+	/**
+	 * Overloaded assignment operator.
+	 * @param ptr a pointer to the object to copy from.  Must be of the same template type.
+	 * @return Returns a reference to this object.
+	 */
+	inline const daeSmartRef<T>& operator=(T* ptr) {
+		checkedRef(ptr);
+		checkedRelease(_ptr);
+		_ptr = ptr;
+		return *this; }
+
+	/**
+	 * Overloaded member selection operator.
+	 * @return a pointer of the template class to the object.
+	 */
+	inline T* operator->() const {
+		assert (_ptr != (T*)NULL); return _ptr; }
+
+	/**
+	 * Overloaded cast operator.
+	 * @return a pointer of the template class to the object.
+	 */
+	inline operator T*() const {
+		return _ptr; }
+	
+	/**
+	 * Static cast function.
+	 * @param smartRef a smartRef to cast from
+	 * @return a pointer to an object of this template class
+	 */
+	template<class U>
+	inline static T* staticCast(const daeSmartRef<U>& smartRef) {
+		return static_cast<T*>(smartRef.cast()); }
+
+private:
+	/* The pointer to the element which is being reference counted */
+	T* _ptr;
+};
+
+#endif // __DAE_SMARTREF_H__
+
+
+
+
+