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  27 <a name="boost_asio.reference.basic_socket_streambuf.io_control.overload2"></a><a class="link" href="overload2.html" title="basic_socket_streambuf::io_control (2 of 2 overloads)">basic_socket_streambuf::io_control
  28           (2 of 2 overloads)</a>
  29 </h5></div></div></div>
  30 <p>
  31             <span class="emphasis"><em>Inherited from basic_socket.</em></span>
  32           </p>
  33 <p>
  34             Perform an IO control command on the socket.
  35           </p>
  36 <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
  37     <span class="keyword">typename</span> <a class="link" href="../../IoControlCommand.html" title="I/O control command requirements">IoControlCommand</a><span class="special">&gt;</span>
  38 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="identifier">io_control</span><span class="special">(</span>
  39     <span class="identifier">IoControlCommand</span> <span class="special">&amp;</span> <span class="identifier">command</span><span class="special">,</span>
  40     <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&amp;</span> <span class="identifier">ec</span><span class="special">);</span>
  41 </pre>
  42 <p>
  43             This function is used to execute an IO control command on the socket.
  44           </p>
  45 <h6>
  46 <a name="boost_asio.reference.basic_socket_streambuf.io_control.overload2.h0"></a>
  47             <span class="phrase"><a name="boost_asio.reference.basic_socket_streambuf.io_control.overload2.parameters"></a></span><a class="link" href="overload2.html#boost_asio.reference.basic_socket_streambuf.io_control.overload2.parameters">Parameters</a>
  48           </h6>
  49 <div class="variablelist">
  50 <p class="title"><b></b></p>
  51 <dl class="variablelist">
  52 <dt><span class="term">command</span></dt>
  53 <dd><p>
  54                   The IO control command to be performed on the socket.
  55                 </p></dd>
  56 <dt><span class="term">ec</span></dt>
  57 <dd><p>
  58                   Set to indicate what error occurred, if any.
  59                 </p></dd>
  60 </dl>
  61 </div>
  62 <h6>
  63 <a name="boost_asio.reference.basic_socket_streambuf.io_control.overload2.h1"></a>
  64             <span class="phrase"><a name="boost_asio.reference.basic_socket_streambuf.io_control.overload2.example"></a></span><a class="link" href="overload2.html#boost_asio.reference.basic_socket_streambuf.io_control.overload2.example">Example</a>
  65           </h6>
  66 <p>
  67             Getting the number of bytes ready to read:
  68           </p>
  69 <pre class="programlisting"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">);</span>
  70 <span class="special">...</span>
  71 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span><span class="special">::</span><span class="identifier">bytes_readable</span> <span class="identifier">command</span><span class="special">;</span>
  72 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">;</span>
  73 <span class="identifier">socket</span><span class="special">.</span><span class="identifier">io_control</span><span class="special">(</span><span class="identifier">command</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
  74 <span class="keyword">if</span> <span class="special">(</span><span class="identifier">ec</span><span class="special">)</span>
  75 <span class="special">{</span>
  76   <span class="comment">// An error occurred.</span>
  77 <span class="special">}</span>
  78 <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">bytes_readable</span> <span class="special">=</span> <span class="identifier">command</span><span class="special">.</span><span class="identifier">get</span><span class="special">();</span>
  79 </pre>
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  83 <td align="right"><div class="copyright-footer">Copyright &#169; 2003-2014 Christopher M. Kohlhoff<p>
  84         Distributed under the Boost Software License, Version 1.0. (See accompanying
  85         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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