214 lines
6.5 KiB
HTML
214 lines
6.5 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>pthread_test_exit_np()--Test Thread Exit Status</title>
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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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<!-- Begin Header Records ========================================== -->
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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 --><!--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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<a name="Top_Of_Page"></a>
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<h2>pthread_test_exit_np()--Test Thread Exit Status</h2>
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<div class="box" style="width: 50%;">
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<br>
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Syntax:
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<pre> #include <pthread.h>
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#include <sched.h>
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int pthread_test_exit_np(void **status); </pre>
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Service Program Name: QP0WPTHR<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE <br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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Signal Safe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The pthread_test_exit_np() function returns the current state of the thread along with its exit status.</p>
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<p>If the thread is currently processing an exit condition due to a call to <strong>pthread_exit</strong>() or cancellation due to being the target of a <strong>pthread_cancel</strong>(), <strong>pthread_test_exit_np</strong>() returns <strong>PTHREAD_STATUS_EXIT_NP</strong> and sets the exit status pointed to by the status parameter to be the current thread exit status.</p>
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<p>If the thread is currently running and is not running cancellation cleanup handlers or data destructors while terminating, <strong>pthread_test_exit_np()</strong> returns <strong>PTHREAD_STATUS_ACTIVE_NP</strong>, and does not return the exit status.</p>
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<p><strong>Note:</strong> This function is not portable.</p>
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<br>
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<h3>Authorities and Locks</h3>
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<p>None.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt><strong>status</strong></dt>
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<dd>Pointer to the parameter to receive the exit status if <em>PTHREAD_STATUS_EXIT_NP</em> is returned</dd>
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</dl>
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<br>
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<h3>Return Value</h3>
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<dl>
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<dt><strong>PTHREAD_STATUS_ACTIVE_NP</strong></dt>
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<dd>The thread is currently not exiting.<br><br></dd>
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<dt><strong>PTHREAD_STATUS_EXIT_NP</strong></dt>
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<dd>The thread is currently exiting.<br><br></dd>
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<dt><strong>value</strong></dt>
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<dd><strong>pthread_test_exit_np()</strong> was not successful. <em>value</em> is set to indicate the error condition.</dd>
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</dl>
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<br>
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<h3>Error Conditions</h3>
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<p>If <strong>pthread_test_exit_np()</strong> was not successful, the error condition returned usually indicates one of the following errors. Under some conditions, the value returned could indicate an error other than those listed here.</p>
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<dl>
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<dt><em>[EINVAL]</em></dt>
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<dd><p>The values specified for the argument are not correct.</p></dd>
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</dl>
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<br>
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<h3>Related Information</h3>
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<ul>
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<li>The <<strong>pthread.h</strong>> header file. See <a href="rzah4hed.htm">Header files for Pthread functions</a>.<br><br></li>
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<li><a href="users_39.htm">pthread_cancel()</a>--Cancel Thread<br><br></li>
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<li><a href="users_18.htm">pthread_exit()</a>--Terminate Calling Thread</li>
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</ul>
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<br>
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<h3>Example</h3>
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<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
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for information pertaining to code examples.</p>
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<pre>#define _MULTI_THREADED
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#include <pthread.h>
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#include <stdio.h>
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#include "check.h"
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int checkStatusFailed1=0;
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int missedHandler1=1;
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int thread1Status=42;
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void cleanupHandler1(void *arg)
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{
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int rc;
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void *status;
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printf("Thread 1 - cleanup handler\n");
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missedHandler1=0;
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rc = pthread_test_exit_np(&status);
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if (rc != PTHREAD_STATUS_EXIT_NP) {
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printf("Thread 1 - returned %d instead "
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"of PTHREAD_STATUS_EXIT_NP\n", rc);
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checkStatusFailed1 = 1;
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return;
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}
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if (__INT(status) != thread1Status) {
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printf("Thread 1 - status = %d\n"
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"Thread 1 - expected %d\n",
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__INT(status), thread1Status);
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checkStatusFailed1=1;
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}
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printf("Thread 1 - correctly got PTHREAD_STATUS_EXIT_NP "
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"and thread exit status of %d\n", thread1Status);
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}
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void *thread1func(void *parm)
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{
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printf("Thread 1 - Entered\n");
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pthread_cleanup_push(cleanupHandler1, NULL);
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pthread_exit(__VOID(thread1Status));
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pthread_cleanup_pop(0);
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return __VOID(0);
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}
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int main(int argc, char **argv)
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{
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pthread_t thread;
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int rc=0;
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void *status;
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printf("Enter Testcase - %s\n", argv[0]);
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rc = pthread_test_exit_np(&status);
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if (rc != PTHREAD_STATUS_ACTIVE_NP) {
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printf("We should always be in an ACTIVE status here! rc=%d\n",
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rc);
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exit(1);
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}
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printf("Create the pthread_exit thread\n");
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rc = pthread_create(&thread, NULL, thread1func, NULL);
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checkResults("pthread_create()\n", rc);
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rc = pthread_join(thread, &status);
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checkResults("pthread_join()\n", rc);
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if (__INT(status) != thread1Status) {
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printf("Wrong status from thread 1\n");
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}
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if (checkStatusFailed1 || missedHandler1) {
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printf("The thread did not complete its test correctly! "
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" check=%d, missed=%d\n",
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checkStatusFailed1, missedHandler1);
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exit(1);
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}
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printf("Main completed\n");
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return 0;
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}</pre>
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<p><strong>Output:</strong></p>
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<pre>Enter Testcase - QP0WTEST/TPTEXIT0
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Create the pthread_exit thread
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Thread 1 - Entered
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Thread 1 - cleanup handler
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Thread 1 - correctly got PTHREAD_STATUS_EXIT_NP and thread exit status of 42
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Main completed</pre>
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<hr>
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API introduced: V4R3
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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"><a href="#Top_Of_Page">Top</a> |
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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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