1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Buffered handshake handler 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="AsyncWriteStream.html" title="Buffer-oriented asynchronous write stream requirements"> 10<link rel="next" href="CompletionCondition.html" title="Completion condition 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="AsyncWriteStream.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="CompletionCondition.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.BufferedHandshakeHandler"></a><a class="link" href="BufferedHandshakeHandler.html" title="Buffered handshake handler requirements">Buffered 28 handshake handler requirements</a> 29</h3></div></div></div> 30<p> 31 A buffered handshake handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>. 32 A value <code class="computeroutput">h</code> of a buffered handshake handler class should work 33 correctly in the expression <code class="computeroutput">h(ec, s)</code>, where <code class="computeroutput">ec</code> 34 is an lvalue of type <code class="computeroutput">const error_code</code> and <code class="computeroutput">s</code> is 35 an lvalue of type <code class="computeroutput">const size_t</code>. 36 </p> 37<h5> 38<a name="boost_asio.reference.BufferedHandshakeHandler.h0"></a> 39 <span class="phrase"><a name="boost_asio.reference.BufferedHandshakeHandler.examples"></a></span><a class="link" href="BufferedHandshakeHandler.html#boost_asio.reference.BufferedHandshakeHandler.examples">Examples</a> 40 </h5> 41<p> 42 A free function as a buffered handshake handler: 43 </p> 44<pre class="programlisting">void handshake_handler( 45 const boost::system::error_code& ec, 46 std::size_t bytes_transferred) 47{ 48 ... 49} 50</pre> 51<p> 52 A buffered handshake handler function object: 53 </p> 54<pre class="programlisting">struct handshake_handler 55{ 56 ... 57 void operator()( 58 const boost::system::error_code& ec, 59 std::size_t bytes_transferred) 60 { 61 ... 62 } 63 ... 64}; 65</pre> 66<p> 67 A non-static class member function adapted to a buffered handshake handler 68 using <code class="computeroutput">boost::bind()</code>: 69 </p> 70<pre class="programlisting">void my_class::handshake_handler( 71 const boost::system::error_code& ec, 72 std::size_t bytes_transferred) 73{ 74 ... 75} 76... 77socket.async_handshake(..., 78 boost::bind(&my_class::handshake_handler, 79 this, boost::asio::placeholders::error, 80 boost::asio::placeholders::bytes_transferred)); 81</pre> 82</div> 83<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 84<td align="left"></td> 85<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 86 Kohlhoff<p> 87 Distributed under the Boost Software License, Version 1.0. (See accompanying 88 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>) 89 </p> 90</div></td> 91</tr></table> 92<hr> 93<div class="spirit-nav"> 94<a accesskey="p" href="AsyncWriteStream.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="CompletionCondition.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 95</div> 96</body> 97</html> 98
