1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

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     7     Nokia Corporation - initial contribution.

     8 Contributors: 

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    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept xml:lang="en" id="GUID-BA9A7DF9-258A-5822-9115-E1102D609749"><title>Ownership of reference counting objects</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>A reference counting object, a <codeph>CObject</codeph> type, may be owned by another. This, in turn, may be owned by yet another. </p> <p>Ownership simply reflects a natural relationship. For example, a timer is owned by a thread and a thread is owned by a process. These objects are all instances of classes derived from <xref href="GUID-9230EF62-376A-389C-B720-7C1EDCB7EA97.dita"><apiname>CObject</apiname></xref>. </p> <p>A reference counting object assigns ownership of itself to another reference counting object using <xref href="GUID-9230EF62-376A-389C-B720-7C1EDCB7EA97.dita#GUID-9230EF62-376A-389C-B720-7C1EDCB7EA97/GUID-992FB670-72FC-31CA-9DE9-C7918169C022"><apiname>CObject::SetOwner()</apiname></xref>. For example: </p> <codeblock id="GUID-4D6F9852-44A4-5C3F-8B1B-1BBFA6B83C20" xml:space="preserve">

    13 ...

    14 class CMyobject : public CObject

    15     {

    16     ...

    17     };

    18 class CTheOwner : public CObject

    19     {

    20     ...

    21     }

    22 ...

    23 CMyobject*    owned;

    24 CTheOwner*    owner;

    25 ...

    26 owned->SetOwner(owner);

    27 </codeblock> </conbody></concept>