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<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.IoControlCommand"></a><a class="link" href="IoControlCommand.html" title="I/O control command requirements">I/O control command
      requirements</a>
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<p>
        In the table below, <code class="computeroutput"><span class="identifier">X</span></code> denotes
        an I/O control command class, <code class="computeroutput"><span class="identifier">a</span></code>
        denotes a value of <code class="computeroutput"><span class="identifier">X</span></code>, and
        <code class="computeroutput"><span class="identifier">u</span></code> denotes an identifier.
      </p>
<div class="table">
<a name="asio.reference.IoControlCommand.t0"></a><p class="title"><b>Table&#160;16.&#160;IoControlCommand requirements</b></p>
<div class="table-contents"><table class="table" summary="IoControlCommand 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="identifier">a</span><span class="special">.</span><span class="identifier">name</span><span class="special">();</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="keyword">int</span></code>
                </p>
              </td>
<td>
                <p>
                  Returns a value suitable for passing as the <span class="emphasis"><em>request</em></span>
                  argument to <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/000095399/functions/ioctl.html" target="_top"><code class="computeroutput"><span class="identifier">ioctl</span><span class="special">()</span></code></a>
                  (or equivalent).
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">data</span><span class="special">();</span></code>
                </p>
              </td>
<td>
                <p>
                  a pointer, convertible to <code class="computeroutput"><span class="keyword">void</span><span class="special">*</span></code>
                </p>
              </td>
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              </td>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2014 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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