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<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>
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<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>
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