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<!DOCTYPE concept
  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept id="GUID-4C406E49-7726-5620-AAAA-84C33DADAF4B" xml:lang="en"><title>Opening
a handle to an existing global Kernel object</title><shortdesc>This document describes how to find a global kernel object by using
a handle.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>A handle can be opened on an existing global Kernel object.</p>
<p>Global Kernel objects are explicitly named by their creators; the technique
for finding these objects involves using a search pattern to search for objects
with matching full names. The <codeph>TFindHandleBase</codeph> provides the
basic behavior.</p>
<p>In practice, each specific type has its own class derived from <codeph>TFindHandleBase</codeph>,
for example, semaphores have <codeph>TFindSemaphore</codeph>, mutexes have <codeph>TFindMutex</codeph> and
so on.</p>
<p>For example, the following code fragment searches for the first global
semaphore whose full name ends with the characters "day" and opens a thread-relative
handle on that semaphore:</p>
<codeblock id="GUID-C1C801A9-4B15-5369-8007-17BB7DC3E0A9" xml:space="preserve">_LIT(KDay,"*day");
...
TFindSemaphore finder(KDay);       // derived from TFindHandleBase
TFullName      theName;
RSemaphore     theSem;             // derived from RHandleBase
...
if ((finder.Next(thename))==KErrNone)
    {
       theSem.Open(finder,EOwnerThread);
       ...
       }
...
</codeblock>
</conbody></concept>