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

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

     3 <!-- This component and the accompanying materials are made available under the terms of the License 

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

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE concept

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

    12 <concept id="GUID-4C406E49-7726-5620-AAAA-84C33DADAF4B" xml:lang="en"><title>Opening

    13 a handle to an existing global Kernel object</title><shortdesc>This document describes how to find a global kernel object by using

    14 a handle.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    15 <p>A handle can be opened on an existing global Kernel object.</p>

    16 <p>Global Kernel objects are explicitly named by their creators; the technique

    17 for finding these objects involves using a search pattern to search for objects

    18 with matching full names. The <codeph>TFindHandleBase</codeph> provides the

    19 basic behavior.</p>

    20 <p>In practice, each specific type has its own class derived from <codeph>TFindHandleBase</codeph>,

    21 for example, semaphores have <codeph>TFindSemaphore</codeph>, mutexes have <codeph>TFindMutex</codeph> and

    22 so on.</p>

    23 <p>For example, the following code fragment searches for the first global

    24 semaphore whose full name ends with the characters "day" and opens a thread-relative

    25 handle on that semaphore:</p>

    26 <codeblock id="GUID-C1C801A9-4B15-5369-8007-17BB7DC3E0A9" xml:space="preserve">_LIT(KDay,"*day");

    27 ...

    28 TFindSemaphore finder(KDay);       // derived from TFindHandleBase

    29 TFullName      theName;

    30 RSemaphore     theSem;             // derived from RHandleBase

    31 ...

    32 if ((finder.Next(thename))==KErrNone)

    33     {

    34        theSem.Open(finder,EOwnerThread);

    35        ...

    36        }

    37 ...

    38 </codeblock>

    39 </conbody></concept>