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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2004 IEEE and The Open Group, All Rights Reserved --><title>sched_get_priority_max</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="sched_get_priority_max"></a> <a name="tag_03_618"></a><!-- sched_get_priority_max --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2004 Edition<br>Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_03_618_01"></a>NAME</h4><blockquote>sched_get_priority_max, sched_get_priority_min - get priority limits (<b>REALTIME</b>)</blockquote><h4><a name="tag_03_618_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><div class="box"><code><tt><sup>[<a href="javascript:open_code('PS')">PS|TPS</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> #include <<a href="../basedefs/sched.h.html">sched.h</a>><br><br> int sched_get_priority_max(int</tt> <i>policy</i><tt>);<br> int sched_get_priority_min(int</tt> <i>policy</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div><tt><br></tt></blockquote><h4><a name="tag_03_618_03"></a>DESCRIPTION</h4><blockquote><p>The <i>sched_get_priority_max</i>() and <i>sched_get_priority_min</i>() functions shall return the appropriate maximum orminimum, respectively, for the scheduling policy specified by <i>policy</i>.</p><p>The value of <i>policy</i> shall be one of the scheduling policy values defined in <a href="../basedefs/sched.h.html"><i><sched.h></i></a>.</p></blockquote><h4><a name="tag_03_618_04"></a>RETURN VALUE</h4><blockquote><p>If successful, the <i>sched_get_priority_max</i>() and <i>sched_get_priority_min</i>() functions shall return the appropriatemaximum or minimum values, respectively. If unsuccessful, they shall return a value of -1 and set <i>errno</i> to indicate theerror.</p></blockquote><h4><a name="tag_03_618_05"></a>ERRORS</h4><blockquote><p>The <i>sched_get_priority_max</i>() and <i>sched_get_priority_min</i>() functions shall fail if:</p><dl compact><dt>[EINVAL]</dt><dd>The value of the <i>policy</i> parameter does not represent a defined scheduling policy.</dd></dl></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_618_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_618_07"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_618_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_618_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_618_10"></a>SEE ALSO</h4><blockquote><p><a href="sched_getparam.html"><i>sched_getparam</i>()</a>, <a href="sched_setparam.html"><i>sched_setparam</i>()</a>, <a href="sched_getscheduler.html"><i>sched_getscheduler</i>()</a>, <a href="sched_rr_get_interval.html"><i>sched_rr_get_interval</i>()</a>, <a href="sched_setscheduler.html"><i>sched_setscheduler</i>()</a>, the Base Definitions volume ofIEEE Std 1003.1-2001, <a href="../basedefs/sched.h.html"><i><sched.h></i></a></p></blockquote><h4><a name="tag_03_618_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 5. Included for alignment with the POSIX Realtime Extension.</p></blockquote><h4><a name="tag_03_618_12"></a>Issue 6</h4><blockquote><p>These functions are marked as part of the Process Scheduling option.</p><p>The [ENOSYS] error condition has been removed as stubs need not be provided if an implementation does not support the ProcessScheduling option.</p><p>The [ESRCH] error condition has been removed since these functions do not take a <i>pid</i> argument.</p><p>IEEE Std 1003.1-2001/Cor 1-2002, item XSH/TC1/D6/52 is applied, changing the PS margin code in the SYNOPSIS toPS|TPS.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr size="2" noshade><center><font size="2"><!--footer start-->UNIX ® is a registered Trademark of The Open Group.<br>POSIX ® is a registered Trademark of The IEEE.<br>[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href="../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>]</font></center><!--footer end--><hr size="2" noshade></body></html>⌨️ 快捷键说明
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