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<center><font size="2">The Open Group Base Specifications Issue 6<br>
IEEE Std 1003.1-2001<br>
Copyright &copy; 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<hr size="2" noshade>
<h4><a name="tag_13_42_01"></a>NAME</h4>
<blockquote>setjmp.h - stack environment declarations</blockquote>
<h4><a name="tag_13_42_02"></a>SYNOPSIS</h4>
<blockquote class="synopsis">
<p><tt>#include &lt;setjmp.h&gt;</tt></p>
</blockquote>
<h4><a name="tag_13_42_03"></a>DESCRIPTION</h4>
<blockquote>
<div class="box"><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]"
border="0"> Some of the functionality described on this reference page extends the ISO&nbsp;C standard. Applications shall define
the appropriate feature test macro (see the System Interfaces volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../functions/xsh_chap02_02.html">Section 2.2, The Compilation Environment</a>) to enable the visibility of these symbols in this
header. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></div>
<p>The <i>&lt;setjmp.h&gt;</i> header shall define the array types <b>jmp_buf</b> and <sup>[<a href=
"javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> <b>sigjmp_buf</b>.
<img src="../images/opt-end.gif" alt="[Option End]" border="0"></p>
<p>The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.</p>
<pre>
<tt>void longjmp(jmp_buf, int);
<sup>[<a href="javascript:open_code('CX')">CX</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
void siglongjmp(sigjmp_buf, int);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
<sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
void _longjmp(jmp_buf, int);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
</tt>
</pre>
<p>The following may be declared as a function, or defined as a macro, or both. Function prototypes shall be provided.</p>
<pre>
<tt>int setjmp(jmp_buf);
<sup>[<a href="javascript:open_code('CX')">CX</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int sigsetjmp(sigjmp_buf, int);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
<sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int _setjmp(jmp_buf);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
</tt>
</pre>
</blockquote>
<hr>
<div class="box"><em>The following sections are informative.</em></div>
<h4><a name="tag_13_42_04"></a>APPLICATION USAGE</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_13_42_05"></a>RATIONALE</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_13_42_06"></a>FUTURE DIRECTIONS</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_13_42_07"></a>SEE ALSO</h4>
<blockquote>
<p>The System Interfaces volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href="../functions/longjmp.html"><i>longjmp</i>()</a>, <a
href="../functions/_longjmp.html"><i>_longjmp</i>()</a>, <a href="../functions/setjmp.html"><i>setjmp</i>()</a>, <a href=
"../functions/siglongjmp.html"><i>siglongjmp</i>()</a>, <a href="../functions/sigsetjmp.html"><i>sigsetjmp</i>()</a></p>
</blockquote>
<h4><a name="tag_13_42_08"></a>CHANGE HISTORY</h4>
<blockquote>
<p>First released in Issue 1.</p>
</blockquote>
<h4><a name="tag_13_42_09"></a>Issue 6</h4>
<blockquote>
<p>Extensions beyond the ISO&nbsp;C standard are marked.</p>
</blockquote>
<div class="box"><em>End of informative text.</em></div>
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