206 lines
5.4 KiB
HTML
206 lines
5.4 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
|
||
|
|
<title>pthread_attr_setinheritsched()--Set Thread Attribute Inherit Scheduling
|
||
|
|
Attributes</title>
|
||
|
|
<!-- 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. -->
|
||
|
|
<!-- Begin Header Records ========================================== -->
|
||
|
|
<!-- NETMG2 SCRIPT A converted by B2H R4.1 (346) (CMS) by HOLTJM at -->
|
||
|
|
<!-- RCHVMW2 on 29 Jan 1999 at 10:01:37 -->
|
||
|
|
<!--File Edited November 2001 -->
|
||
|
|
<!--End Header Records -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<!-- Java sync-link -->
|
||
|
|
<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<a name="Top_Of_Page"></a>
|
||
|
|
|
||
|
|
<h2>pthread_attr_setinheritsched()--Set Thread Attribute Inherit Scheduling
|
||
|
|
Attributes</h2>
|
||
|
|
|
||
|
|
<div class="box" style="width: 60%;">
|
||
|
|
<br>
|
||
|
|
Syntax:
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
#include <pthread.h>
|
||
|
|
#include <sched.h>
|
||
|
|
int pthread_attr_setinheritsched(pthread_attr_t *attr,
|
||
|
|
int *inheritsched);
|
||
|
|
</pre>
|
||
|
|
Service Program Name: QP0WPTHR<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Default Public Authority: *USE <br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Threadsafe: Yes<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Signal Safe: Yes<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>The pthread_attr_setinheritsched() function sets the <em>inheritsched</em>
|
||
|
|
attribute in the thread attributes object specified. The <em>inheritsched</em>
|
||
|
|
attribute should be one of <strong>PTHREAD_EXPLICIT_SCHED</strong> or
|
||
|
|
<strong>PTHREAD_INHERIT_SCHED</strong>. The default inheritsched attribute is
|
||
|
|
<strong>PTHREAD_EXPLICIT_SCHED</strong>, with a default priority of zero.</p>
|
||
|
|
|
||
|
|
<p>Use the <em>inheritsched</em> attribute to inherit or explicitly specify the
|
||
|
|
scheduling attributes when creating new threads.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Authorities and Locks</h3>
|
||
|
|
|
||
|
|
<p>None.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Parameters</h3>
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><strong>attr</strong></dt>
|
||
|
|
|
||
|
|
<dd>(Input) Address of thread creation attributes</dd>
|
||
|
|
|
||
|
|
<dt><strong>inheritsched</strong></dt>
|
||
|
|
|
||
|
|
<dd>(Output) Address of the variable to receive the inheritsched attribute</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Return Value</h3>
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><strong>0</strong></dt>
|
||
|
|
|
||
|
|
<dd>pthread_attr_setinheritsched() was successful</dd>
|
||
|
|
|
||
|
|
<dt><strong>value</strong></dt>
|
||
|
|
|
||
|
|
<dd>pthread_attr_setinheritsched() was not successful. <em>value</em> is set to
|
||
|
|
indicate the error condition</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Error Conditions</h3>
|
||
|
|
|
||
|
|
<p>If <strong>pthread_attr_setinheritsched()</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>
|
||
|
|
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><em>[EINVAL]</em></dt>
|
||
|
|
|
||
|
|
<dd><p>The value specified for the argument is not correct.</p></dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Related Information</h3>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li>The <<strong>pthread.h</strong>> header file. See <a href=
|
||
|
|
"rzah4hed.htm">Header files for Pthread functions</a>.<br><br></li>
|
||
|
|
|
||
|
|
<li><a href="users_g7.htm">pthread_attr_getinheritsched()</a>--Get Thread Attribute
|
||
|
|
Object Inherit Scheduling Attributes<br><br></li>
|
||
|
|
|
||
|
|
<li><a href="users_g8.htm">pthread_attr_getschedparam()</a>--Get Thread Attributes
|
||
|
|
Object Scheduling Parameters</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Example</h3>
|
||
|
|
<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
|
||
|
|
for information pertaining to code examples.</p>
|
||
|
|
<pre>
|
||
|
|
#define _MULTI_THREADED
|
||
|
|
#include <pthread.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <except.h>
|
||
|
|
#include "check.h"
|
||
|
|
|
||
|
|
void showInheritSched(pthread_attr_t *attr) {
|
||
|
|
int rc;
|
||
|
|
int inheritsched;
|
||
|
|
rc = pthread_attr_getinheritsched(attr, &inheritsched);
|
||
|
|
checkResults("pthread_attr_getinheritsched()\n", rc);
|
||
|
|
|
||
|
|
switch(inheritsched) {
|
||
|
|
case PTHREAD_EXPLICIT_SCHED:
|
||
|
|
printf("Inherit Sched - PTHREAD_EXPLICIT_SCHED\n");
|
||
|
|
break;
|
||
|
|
case PTHREAD_INHERIT_SCHED:
|
||
|
|
printf("Inherit Sched - PTHREAD_INHERIT_SCHED\n");
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
printf("Invalid inheritsched attribute!\n");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
pthread_t thread;
|
||
|
|
int rc=0;
|
||
|
|
pthread_attr_t attr;
|
||
|
|
char c;
|
||
|
|
void *status;
|
||
|
|
|
||
|
|
printf("Enter Testcase - %s\n", argv[0]);
|
||
|
|
|
||
|
|
rc = pthread_attr_init(&attr);
|
||
|
|
checkResults("pthread_attr_init()\n", rc);
|
||
|
|
|
||
|
|
showInheritSched(&attr);
|
||
|
|
|
||
|
|
rc = pthread_attr_setinheritsched(&attr, PTHREAD_INHERIT_SCHED);
|
||
|
|
checkResults("pthread_attr_setinheritsched()\n", rc);
|
||
|
|
|
||
|
|
showInheritSched(&attr);
|
||
|
|
|
||
|
|
rc = pthread_attr_destroy(&attr);
|
||
|
|
checkResults("pthread_attr_destroy()\n", rc);
|
||
|
|
|
||
|
|
printf("Main completed\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p><strong>Output:</strong></p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
Enter Testcase - QP0WTEST/TPSIS0
|
||
|
|
Inherit Sched - PTHREAD_EXPLICIT_SCHED
|
||
|
|
Inherit Sched - PTHREAD_INHERIT_SCHED
|
||
|
|
Main completed
|
||
|
|
</pre>
|
||
|
|
<hr>
|
||
|
|
API introduced: V4R3
|
||
|
|
<hr>
|
||
|
|
<center>
|
||
|
|
<table cellpadding="2" cellspacing="2">
|
||
|
|
<tr align="center">
|
||
|
|
<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
|
||
|
|
"rzah4mst.htm">Pthread APIs</a> | <a href="aplist.htm">APIs by
|
||
|
|
category</a></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</center>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
|