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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) 2001-2003 The Open Group, All Rights Reserved --><title>siglongjmp</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="siglongjmp"></a> <a name="tag_03_689"></a><!-- siglongjmp --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2003 Edition<br>Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_03_689_01"></a>NAME</h4><blockquote>siglongjmp - non-local goto with signal handling</blockquote><h4><a name="tag_03_689_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><div class="box"><code><tt><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> #include <<a href="../basedefs/setjmp.h.html">setjmp.h</a>><br><br> void siglongjmp(sigjmp_buf</tt> <i>env</i><tt>, int</tt> <i>val</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_689_03"></a>DESCRIPTION</h4><blockquote><p>The <i>siglongjmp</i>() function shall be equivalent to the <a href="../functions/longjmp.html"><i>longjmp</i>()</a> function,except as follows:</p><ul><li><p>References to <a href="../functions/setjmp.html"><i>setjmp</i>()</a> shall be equivalent to <a href="../functions/sigsetjmp.html"><i>sigsetjmp</i>()</a>.</p></li><li><p>The <i>siglongjmp</i>() function shall restore the saved signal mask if and only if the <i>env</i> argument was initialized by acall to <a href="../functions/sigsetjmp.html"><i>sigsetjmp</i>()</a> with a non-zero <i>savemask</i> argument.</p></li></ul></blockquote><h4><a name="tag_03_689_04"></a>RETURN VALUE</h4><blockquote><p>After <i>siglongjmp</i>() is completed, program execution shall continue as if the corresponding invocation of <a href="../functions/sigsetjmp.html"><i>sigsetjmp</i>()</a> had just returned the value specified by <i>val</i>. The <i>siglongjmp</i>()function shall not cause <a href="../functions/sigsetjmp.html"><i>sigsetjmp</i>()</a> to return 0; if <i>val</i> is 0, <a href="../functions/sigsetjmp.html"><i>sigsetjmp</i>()</a> shall return the value 1.</p></blockquote><h4><a name="tag_03_689_05"></a>ERRORS</h4><blockquote><p>No errors are defined.</p></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_689_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_689_07"></a>APPLICATION USAGE</h4><blockquote><p>The distinction between <a href="../functions/setjmp.html"><i>setjmp</i>()</a> or <a href="../functions/longjmp.html"><i>longjmp</i>()</a> and <a href="../functions/sigsetjmp.html"><i>sigsetjmp</i>()</a> or<i>siglongjmp</i>() is only significant for programs which use <a href="../functions/sigaction.html"><i>sigaction</i>()</a>, <ahref="../functions/sigprocmask.html"><i>sigprocmask</i>()</a>, or <a href="../functions/sigsuspend.html"><i>sigsuspend</i>()</a>.</p></blockquote><h4><a name="tag_03_689_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_689_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_689_10"></a>SEE ALSO</h4><blockquote><p><a href="longjmp.html"><i>longjmp</i>()</a> , <a href="setjmp.html"><i>setjmp</i>()</a> , <a href="sigprocmask.html"><i>sigprocmask</i>()</a> , <a href="sigsetjmp.html"><i>sigsetjmp</i>()</a> , <a href="sigsuspend.html"><i>sigsuspend</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/setjmp.h.html"><i><setjmp.h></i></a></p></blockquote><h4><a name="tag_03_689_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 3. Included for alignment with the ISO POSIX-1 standard.</p></blockquote><h4><a name="tag_03_689_12"></a>Issue 5</h4><blockquote><p>The DESCRIPTION is updated for alignment with the POSIX Threads Extension.</p></blockquote><h4><a name="tag_03_689_13"></a>Issue 6</h4><blockquote><p>The DESCRIPTION is rewritten in terms of <a href="../functions/longjmp.html"><i>longjmp</i>()</a>.</p><p>The SYNOPSIS is marked CX since the presence of this function in the <a href="../basedefs/setjmp.h.html"><i><setjmp.h></i></a> header is an extension over the ISO C standard.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr><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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