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authorCraig Jennings <c@cjennings.net>2025-08-14 22:58:58 -0500
committerCraig Jennings <c@cjennings.net>2025-08-14 22:58:58 -0500
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- <h1 id="firstHeading" class="firstHeading">quick_exit</h1> <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;stdlib.h&gt;</code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl t-since-c11 t-until-c23"> <td><pre data-language="c">_Noreturn void quick_exit( int exit_code );</pre></td> <td class="t-dcl-nopad"> </td> <td>
-<span class="t-mark-rev t-since-c11">(since C11)</span> <br><span class="t-mark-rev t-until-c23">(until C23)</span>
-</td> </tr> <tr class="t-dcl t-since-c23"> <td> <pre data-language="c">[[noreturn]] void quick_exit( int exit_code );</pre>
-</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c23">(since C23)</span> </td> </tr> </table> <p>Causes normal program termination to occur without completely cleaning the resources.</p>
-<p>Functions passed to <code><a href="at_quick_exit" title="c/program/at quick exit">at_quick_exit</a></code> are called in reverse order of their registration. After calling the registered functions, calls <code><a href="http://en.cppreference.com/w/c/program/_Exit"><span class="kw489">_Exit</span></a><span class="br0">(</span>exit_code<span class="br0">)</span></code>.</p>
-<p>Functions passed to <code><a href="atexit" title="c/program/atexit">atexit</a></code> or signal handlers passed to <code><a href="signal" title="c/program/signal">signal</a></code> are not called.</p>
-<h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> exit_code </td> <td> - </td> <td> exit status of the program </td>
-</tr>
-</table> <h3 id="Return_value"> Return value</h3> <p>(none)</p>
-<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;stdlib.h&gt;
-#include &lt;stdio.h&gt;
-
-void f1(void)
-{
- puts("pushed first");
- fflush(stdout);
-}
-
-void f2(void)
-{
- puts("pushed second");
-}
-
-void f3(void)
-{
- puts("won't be called");
-}
-
-int main(void)
-{
- at_quick_exit(f1);
- at_quick_exit(f2);
- atexit(f3);
- quick_exit(0);
-}</pre></div> <p>Output:</p>
-<div class="text source-text"><pre data-language="c">pushed second
-pushed first</pre></div> </div> <h3 id="References"> References</h3> <ul>
-<li> C17 standard (ISO/IEC 9899:2018): </li>
-<ul><li> 7.22.4.7 The quick_exit function (p: 257) </li></ul>
-<li> C11 standard (ISO/IEC 9899:2011): </li>
-<ul><li> 7.22.4.7 The quick_exit function (p: 353) </li></ul>
-</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="abort" title="c/program/abort"> <span class="t-lines"><span>abort</span></span></a></div> </td> <td> causes abnormal program termination (without cleaning up) <br> <span class="t-mark">(function)</span> </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="atexit" title="c/program/atexit"> <span class="t-lines"><span>atexit</span></span></a></div> </td> <td> registers a function to be called on <code><a href="exit" title="c/program/exit">exit()</a></code> invocation <br> <span class="t-mark">(function)</span> </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="at_quick_exit" title="c/program/at quick exit"> <span class="t-lines"><span>at_quick_exit</span></span></a></div>
-<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div> </td> <td> registers a function to be called on <strong class="selflink"><code>quick_exit</code></strong> invocation <br> <span class="t-mark">(function)</span> </td>
-</tr> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/utility/program/quick_exit" title="cpp/utility/program/quick exit">C++ documentation</a></span> for <code>quick_exit</code> </td>
-</tr> </table> <div class="_attribution">
- <p class="_attribution-p">
- &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
- <a href="https://en.cppreference.com/w/c/program/quick_exit" class="_attribution-link">https://en.cppreference.com/w/c/program/quick_exit</a>
- </p>
-</div>