1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #include "directgdidrawableref.h"

    17 

    18 

    19 /**

    20 Destructor. Checks that the reference count is zero to make sure all references to this object have

    21 been closed properly before it is destroyed.

    22 

    23 @panic DGDIAdapter 44, if the reference count is not zero. The

    24 driver that created this object is responsible for decrementing the reference count.

    25  */

    26 CDirectGdiDrawableRef::~CDirectGdiDrawableRef()

    27 	{

    28 	GRAPHICS_ASSERT_DEBUG(iRefCount == 0, EDirectGdiPanicDrawableRefDestructorError);

    29 	}

    30 

    31 /**

    32 Increments the reference count for this object.

    33 */

    34 void CDirectGdiDrawableRef::Open()

    35 	{

    36 	++iRefCount;

    37 	}

    38 

    39 /**

    40 Decrements the reference count for this object. When the count reaches zero, it deletes itself.

    41 Therefore no operations should be called on an object of this type after calling DecRefCount().

    42 

    43 @return The decremented open count.

    44 

    45 @panic DGDIAdapter 30, when attempting to decrement a reference count that is zero or less.

    46  */

    47 void CDirectGdiDrawableRef::Close()

    48 	{

    49 	GRAPHICS_ASSERT_DEBUG(iRefCount > 0, EDirectGdiPanicDrawableRefCountError);

    50 	if (--iRefCount == 0)

    51 		{

    52 		delete this;

    53 		}

    54 	}