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<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.GettableSerialPortOption"></a><a class="link" href="GettableSerialPortOption.html" title="Gettable serial port option requirements">Gettable serial
port option requirements</a>
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<p>
In the table below, <code class="computeroutput"><span class="identifier">X</span></code> denotes
a serial port option class, <code class="computeroutput"><span class="identifier">a</span></code>
denotes a value of <code class="computeroutput"><span class="identifier">X</span></code>, <code class="computeroutput"><span class="identifier">ec</span></code> denotes a value of type <code class="computeroutput"><span class="identifier">error_code</span></code>, and <code class="computeroutput"><span class="identifier">s</span></code>
denotes a value of implementation-defined type <span class="emphasis"><em><code class="literal">storage</code></em></span>
(where <span class="emphasis"><em><code class="literal">storage</code></em></span> is the type <code class="computeroutput"><span class="identifier">DCB</span></code> on Windows and <code class="computeroutput"><span class="identifier">termios</span></code>
on <span class="emphasis"><em>POSIX</em></span> platforms), and <code class="computeroutput"><span class="identifier">u</span></code>
denotes an identifier.
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<div class="table">
<a name="asio.reference.GettableSerialPortOption.t0"></a><p class="title"><b>Table 19. GettableSerialPortOption requirements</b></p>
<div class="table-contents"><table class="table" summary="GettableSerialPortOption requirements">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
expression
</p>
</th>
<th>
<p>
type
</p>
</th>
<th>
<p>
assertion/note<br> pre/post-conditions
</p>
</th>
</tr></thead>
<tbody><tr>
<td>
<p>
<code class="computeroutput"><span class="keyword">const</span> </code><span class="emphasis"><em><code class="literal">storage</code></em></span><code class="computeroutput"><span class="special">&</span> <span class="identifier">u</span>
<span class="special">=</span> <span class="identifier">s</span><span class="special">;</span></code><br> <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">load</span><span class="special">(</span><span class="identifier">u</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span></code>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="identifier">error_code</span></code>
</p>
</td>
<td>
<p>
Retrieves the value of the serial port option from the storage.<br>
<br> If successful, sets <code class="computeroutput"><span class="identifier">ec</span></code>
such that <code class="computeroutput"><span class="special">!</span><span class="identifier">ec</span></code>
is true. If an error occurred, sets <code class="computeroutput"><span class="identifier">ec</span></code>
such that <code class="computeroutput"><span class="special">!!</span><span class="identifier">ec</span></code>
is true. Returns <code class="computeroutput"><span class="identifier">ec</span></code>.
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<div class="copyright-footer">Copyright © 2003-2023 Christopher M. Kohlhoff<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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