1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>I/O control command requirements</title> 5<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../boost_asio.html" title="Boost.Asio"> 8<link rel="up" href="../reference.html" title="Reference"> 9<link rel="prev" href="InternetProtocol.html" title="Internet protocol requirements"> 10<link rel="next" href="IoObjectService.html" title="I/O object service requirements"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> 15<td align="center"><a href="../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="InternetProtocol.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../boost_asio.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="IoObjectService.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="boost_asio.reference.IoControlCommand"></a><a class="link" href="IoControlCommand.html" title="I/O control command requirements">I/O control command 28 requirements</a> 29</h3></div></div></div> 30<p> 31 A type <code class="computeroutput">X</code> meets the <code class="computeroutput">IoControlCommand</code> requirements 32 if it satisfies the requirements listed below. 33 </p> 34<p> 35 In the table below, <code class="computeroutput">a</code> denotes a (possibly const) value of type 36 <code class="computeroutput">X</code>, and <code class="computeroutput">b</code> denotes a value of type <code class="computeroutput">X</code>. 37 </p> 38<div class="table"> 39<a name="boost_asio.reference.IoControlCommand.t0"></a><p class="title"><b>Table 20. IoControlCommand requirements for extensible implementations</b></p> 40<div class="table-contents"><table class="table" summary="IoControlCommand requirements for extensible implementations"> 41<colgroup> 42<col> 43<col> 44<col> 45</colgroup> 46<thead><tr> 47<th> 48 <p> 49 expression 50 </p> 51 </th> 52<th> 53 <p> 54 type 55 </p> 56 </th> 57<th> 58 <p> 59 assertion/note<br> pre/post-conditions 60 </p> 61 </th> 62</tr></thead> 63<tbody> 64<tr> 65<td> 66 <p> 67 <code class="computeroutput">a.name()</code> 68 </p> 69 </td> 70<td> 71 <p> 72 <code class="computeroutput">int</code> 73 </p> 74 </td> 75<td> 76 <p> 77 Returns a value suitable for passing as the <span class="emphasis"><em>request</em></span> 78 argument to <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/ioctl.html" target="_top"><code class="computeroutput"><span class="identifier">ioctl</span><span class="special">()</span></code></a> 79 (or equivalent). 80 </p> 81 </td> 82</tr> 83<tr> 84<td> 85 <p> 86 <code class="computeroutput">b.data()</code> 87 </p> 88 </td> 89<td> 90 <p> 91 <code class="computeroutput">void*</code> 92 </p> 93 </td> 94<td> 95 </td> 96</tr> 97</tbody> 98</table></div> 99</div> 100<br class="table-break"> 101</div> 102<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 103<td align="left"></td> 104<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 105 Kohlhoff<p> 106 Distributed under the Boost Software License, Version 1.0. (See accompanying 107 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>) 108 </p> 109</div></td> 110</tr></table> 111<hr> 112<div class="spirit-nav"> 113<a accesskey="p" href="InternetProtocol.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../boost_asio.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="IoObjectService.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 114</div> 115</body> 116</html> 117
