69 lines
2.6 KiB
HTML
69 lines
2.6 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Initial thread is special, cannot pthread_exit()</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- NETMG2 SCRIPT A converted by B2H R4.1 (346) (CMS) by HOLTJM at -->
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<!-- RCHVMW2 on 29 Jan 1999 at 10:01:37 -->
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<!--File Edited November 2001 -->
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<!--End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<!-- Java sync-link -->
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<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
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</script>
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<h2>Initial thread is special, cannot pthread_exit()</h2>
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<p>The initial thread in an i5/OS process is special because of these
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characteristics:</p>
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<ul>
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<li>If the initial thread calls <strong>pthread_exit()</strong>, the process
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terminates.</li>
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<li>If the initial thread is the target of a <strong>pthread_cancel()</strong>
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request that is acted upon, the process terminates.</li>
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<li>If the initial thread terminates through any other action, the process
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terminates.</li>
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<li>Many i5/OS APIs and commands target jobs. Some of those APIs target
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resources that are allocated to threads for retrieval or modification. If this
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is the case, the resources that displayed, modified, or retrieved may be the
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resources owned by the initial thread.
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<p>For example, the CL command <strong>WRKACTJOB</strong> allows you to display
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information such as the call stack for a job. Since a job does not have a call
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stack and the call stack is thread scoped, the call stack of the initial thread
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is displayed when you choose to display the call stack of a job.</p>
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<p>Other APIs or CL commands that operate against jobs have undergone similar
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changes. See the specific documentation for the API or CL command of
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concern.</p>
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</li>
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</ul>
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center">
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<a href="rzah4mst.htm">Pthread APIs</a> |
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<a href="aplist.htm">APIs by category</a></td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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