1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/graphics/windowing/windowserver/nonnga/remotegc/CacheBase.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,84 @@
     1.4 +// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#include "CacheBase.h"
    1.20 +
    1.21 +/**
    1.22 +Constructor
    1.23 +Initialized the iCachedItems array with granularity 8 and an offset to iHandle in TCacheEntry,
    1.24 +which will be used to find specific entries later.
    1.25 +*/
    1.26 +CCacheBase::CCacheBase() : iCachedItems(8, _FOFF(TCacheEntry, iHandle))
    1.27 +	{
    1.28 +	
    1.29 +	}
    1.30 +	
    1.31 +CCacheBase::~CCacheBase()
    1.32 +	{
    1.33 +	for(TInt i = 0; i < iCachedItems.Count(); i++)
    1.34 +		{
    1.35 +		delete iCachedItems[i].iCachedItem;
    1.36 +		iCachedItems[i].iCachedItem = NULL;
    1.37 +		}
    1.38 +		
    1.39 +	iCachedItems.Reset();	
    1.40 +	}
    1.41 +
    1.42 +/**
    1.43 +Begins an update of the cache.
    1.44 +*/
    1.45 +void CCacheBase::BeginUpdate()
    1.46 +	{
    1.47 +	// Sets all cached items to not used
    1.48 +	for(TInt i = 0; i < iCachedItems.Count(); i++)
    1.49 +		{
    1.50 +		iCachedItems[i].iIsUsed = EFalse;
    1.51 +		}		
    1.52 +	}
    1.53 +
    1.54 +/**
    1.55 +End an update of the cache.
    1.56 +*/
    1.57 +void CCacheBase::EndUpdate()
    1.58 +	{
    1.59 +	// Removes all cached items that are not used
    1.60 +	for(TInt i = 0; i < iCachedItems.Count(); i++)
    1.61 +		{
    1.62 +		if(!iCachedItems[i].iIsUsed)
    1.63 +			{
    1.64 +			delete iCachedItems[i].iCachedItem;
    1.65 +			iCachedItems.Remove(i--);
    1.66 +			}			
    1.67 +		}
    1.68 +	}
    1.69 +	
    1.70 +/**
    1.71 +Returns an item from the cache corresponding to a specific handle.
    1.72 +
    1.73 +@param aHandle A handle to match against an item in the cache.
    1.74 +@return The item that matches the handle provided as a parameter.
    1.75 +*/
    1.76 +const CBase* CCacheBase::Resolve(TInt aHandle)
    1.77 +	{
    1.78 +	TCacheEntry entry(aHandle);
    1.79 +	TInt index = iCachedItems.FindInUnsignedKeyOrder(entry);
    1.80 +	
    1.81 +	if(index != KErrNotFound)
    1.82 +		return iCachedItems[index].iCachedItem;		
    1.83 +	else
    1.84 +		return NULL;
    1.85 +	}
    1.86 +
    1.87 +