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// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32\euser\us_ref.cpp
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//
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//
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#include "us_std.h"
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/**
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Frees the memory holding the contained object.
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*/
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EXPORT_C void RRefBase::Free()
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{
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if (iPtr)
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{
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if (--iPtr[-1]==0)
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User::Free(iPtr-1);
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iPtr=NULL;
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}
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}
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/**
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Creates a copy of an object, which is to be contained by
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this reference object.
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@param aPtr A pointer to memory holding a copy of the object.
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@param aSize The size of the memory required to hold the object.
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*/
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EXPORT_C void RRefBase::DoAlloc(const TAny *aPtr,TInt aSize)
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{
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__ASSERT_ALWAYS(aSize>=0,Panic(ERefAllocSizeNegative));
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Free();
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iPtr=(TInt *)User::Alloc(aSize+sizeof(TInt));
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if (iPtr!=NULL)
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{
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iPtr++;
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iPtr[-1]=1;
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Mem::Copy(iPtr,aPtr,aSize);
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}
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}
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/**
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Creates a copy of an object, which is to be contained by
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this reference object, and leaves on error.
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@param aPtr A pointer to memory holding a copy of the object.
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@param aSize The size of the memory required to hold the object.
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*/
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EXPORT_C void RRefBase::DoAllocL(const TAny *aPtr,TInt aSize)
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{
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DoAlloc(aPtr,aSize);
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User::LeaveIfNull(iPtr);
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}
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/**
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Provides an implementation for the RRef class copy
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constructor and assignment operator.
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@param aRef The reference object to be copied.
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@see RRef
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*/
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EXPORT_C void RRefBase::Copy(const RRefBase &aRef)
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{
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if (this!=(&aRef))
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{
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Free();
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iPtr=aRef.iPtr;
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iPtr[-1]++;
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}
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}
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