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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     4 "Eclipse Public License v1.0" which accompanies this distribution, 

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     6 <!-- Initial Contributors:

     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 id="GUID-1EDE641E-EF8C-542D-A7B3-7C496D41EF3D" xml:lang="en"><title>Thread

    13 and Process ID</title><shortdesc>Each thread and process is allocated an ID which is unique across

    14 all threads and processes.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    15 <p> The ID is allocated when the thread or process is created. The main motivation

    16 for the ID is to provide assistance for debuggers; it provides an easy way

    17 to identify threads and processes.</p>

    18 <p>In general, applications and servers can use IDs for thread and process

    19 identification or, indeed, for whatever purpose that suits them.</p>

    20 <p>While a thread ID is a property of the thread, it can be retrieved from

    21 the thread by calling <xref href="GUID-B0E661BC-4058-3256-B9C3-5A4FD52F6DE5.dita#GUID-B0E661BC-4058-3256-B9C3-5A4FD52F6DE5/GUID-4B001A02-9F18-376E-868E-A2BB69637ED5"><apiname>RThread::Id()</apiname></xref>. The ID is encapsulated

    22 by a <codeph>TThreadId</codeph> object that is returned by the function.</p>

    23 <p>The <codeph>TThreadId</codeph> class provides <codeph>==</codeph> and <codeph>!=</codeph> operators

    24 for comparing two thread IDs.</p>

    25 <p>The process ID is similar; it can be retrieved from the process by calling <xref href="GUID-9DD1EA2B-DC59-315C-8E9C-CE6D9461B695.dita#GUID-9DD1EA2B-DC59-315C-8E9C-CE6D9461B695/GUID-F35D5AF1-46CC-3F24-AFE6-4539EE470E3D"><apiname>RProcess::Id()</apiname></xref>,

    26 and is encapsulated by a <codeph>TProcessId</codeph> object returned by the

    27 function.</p>

    28 </conbody></concept>