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---
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---
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<h1>nng_close(3) Manual Page</h1>
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_synopsis">SYNOPSIS</a></li>
<li><a href="#_description">DESCRIPTION</a></li>
<li><a href="#_return_values">RETURN VALUES</a></li>
<li><a href="#_errors">ERRORS</a></li>
<li><a href="#_see_also">SEE ALSO</a></li>
</ul>
</div>
<h2 id="_name">NAME</h2>
<div class="sectionbody">
<p>nng_close - close socket</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="pygments highlight"><code data-lang="c"><span></span><span class="tok-cp">#include</span> <span class="tok-cpf"><nng/nng.h></span><span class="tok-cp"></span>
<span class="tok-kt">int</span> <span class="tok-nf">nng_close</span><span class="tok-p">(</span><span class="tok-n">nng_socket</span> <span class="tok-n">s</span><span class="tok-p">);</span></code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The <code>nng_close()</code> function closes the supplied socket, <em>s</em>.
Messages that have been submitted for sending may be flushed or delivered,
depending upon the transport.</p>
</div>
<div class="paragraph">
<p>Further attempts to use the socket after this call returns will result
in <code>NNG_ECLOSED</code>.
Threads waiting for operations on the socket when this
call is executed may also return with an <code>NNG_ECLOSED</code> result.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Closing the socket while data is in transmission will likely lead to loss
of that data.
There is no automatic linger or flush to ensure that the socket send buffers
have completely transmitted.
It is recommended to wait a brief period after calling
<a href="nng_send.3.html"><code>nng_send()</code></a> or similar functions, before calling this
function.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_return_values">RETURN VALUES</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This function returns 0 on success, and non-zero otherwise.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_errors">ERRORS</h2>
<div class="sectionbody">
<div class="hdlist">
<table>
<tr>
<td class="hdlist1">
<code>NNG_ECLOSED</code>
</td>
<td class="hdlist2">
<p>The socket <em>s</em> is already closed or was never opened.</p>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph text-left">
<p><a href="nng_strerror.3.html">nng_strerror(3)</a>,
<a href="nng_options.5.html">nng_options(5)</a>,
<a href="nng_socket.5.html">nng_socket(5)</a>,
<a href="nng.7.html">nng(7)</a></p>
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