<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html lang="en-us" xml:lang="en-us"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="security" content="public" /> <meta name="Robots" content="index,follow" /> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' /> <meta name="DC.Type" content="concept" /> <meta name="DC.Title" content="Wait for a thread to end" /> <meta name="abstract" content="When using threads, it is important to know when a thread has finished processing. Waiting for a thread to perform an action or an event to happen is called thread synchronization." /> <meta name="description" content="When using threads, it is important to know when a thread has finished processing. Waiting for a thread to perform an action or an event to happen is called thread synchronization." /> <meta name="DC.Relation" scheme="URI" content="rzahwtwoco.htm" /> <meta name="DC.Relation" scheme="URI" content="rzahwe14rx.htm" /> <meta name="DC.Relation" scheme="URI" content="rzahwex3rx.htm" /> <meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" /> <meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" /> <meta name="DC.Format" content="XHTML" /> <meta name="DC.Identifier" content="rzahwwat-watco" /> <meta name="DC.Language" content="en-us" /> <!-- All rights reserved. Licensed Materials Property of IBM --> <!-- US Government Users Restricted Rights --> <!-- Use, duplication or disclosure restricted by --> <!-- GSA ADP Schedule Contract with IBM Corp. --> <link rel="stylesheet" type="text/css" href="./ibmdita.css" /> <link rel="stylesheet" type="text/css" href="./ic.css" /> <title>Wait for a thread to end</title> </head> <body id="rzahwwat-watco"><a name="rzahwwat-watco"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">Wait for a thread to end</h1> <div><p>When using threads, it is important to know when a thread has finished processing. Waiting for a thread to perform an action or an event to happen is called thread synchronization.</p> <p>It is typically sufficient to wait for a thread to end. When the thread ends, the application is alerted that the work the thread was assigned is complete or the thread failed. If a status is set by the thread and is supported by your specific API set, you can use the status to determine whether the thread successfully completed its work.</p> <p>When a thread ends, the system reclaims its resources for reuse. You can also wait for a thread to end to reclaim more of the thread's resources for use by other threads.</p> <p>Waiting for a group of threads to end can also be a good way for a larger application, such as a server, to give large amounts of application work to "worker" threads and have a single "boss" thread coordinate the work of the subordinate threads. Your API set can directly support this kind of waiting.</p> </div> <div> <ul class="ullinks"> <li class="ulchildlink"><strong><a href="rzahwe14rx.htm">Example: Wait for threads in a Pthread program</a></strong><br /> This example shows a Pthread program starting several threads, waiting for them to finish, and checking their status after they complete.</li> <li class="ulchildlink"><strong><a href="rzahwex3rx.htm">Example: Wait for threads using Java</a></strong><br /> This example shows a Java™ program starting several threads, waiting for them to finish, and checking their status after completion.</li> </ul> <div class="familylinks"> <div class="parentlink"><strong>Parent topic:</strong> <a href="rzahwtwoco.htm" title="The concepts described here pertain to all programming languages.">i5/OS thread management</a></div> </div> </div> </body> </html>