sl@0: // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include "directgdidrawableref.h"
sl@0: 
sl@0: 
sl@0: /**
sl@0: Destructor. Checks that the reference count is zero to make sure all references to this object have
sl@0: been closed properly before it is destroyed.
sl@0: 
sl@0: @panic DGDIAdapter 44, if the reference count is not zero. The
sl@0: driver that created this object is responsible for decrementing the reference count.
sl@0:  */
sl@0: CDirectGdiDrawableRef::~CDirectGdiDrawableRef()
sl@0: 	{
sl@0: 	GRAPHICS_ASSERT_DEBUG(iRefCount == 0, EDirectGdiPanicDrawableRefDestructorError);
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Increments the reference count for this object.
sl@0: */
sl@0: void CDirectGdiDrawableRef::Open()
sl@0: 	{
sl@0: 	++iRefCount;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Decrements the reference count for this object. When the count reaches zero, it deletes itself.
sl@0: Therefore no operations should be called on an object of this type after calling DecRefCount().
sl@0: 
sl@0: @return The decremented open count.
sl@0: 
sl@0: @panic DGDIAdapter 30, when attempting to decrement a reference count that is zero or less.
sl@0:  */
sl@0: void CDirectGdiDrawableRef::Close()
sl@0: 	{
sl@0: 	GRAPHICS_ASSERT_DEBUG(iRefCount > 0, EDirectGdiPanicDrawableRefCountError);
sl@0: 	if (--iRefCount == 0)
sl@0: 		{
sl@0: 		delete this;
sl@0: 		}
sl@0: 	}