1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>basic_socket_acceptor::async_accept (3 of 8 overloads)</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="../async_accept.html" title="basic_socket_acceptor::async_accept"> 9<link rel="prev" href="overload2.html" title="basic_socket_acceptor::async_accept (2 of 8 overloads)"> 10<link rel="next" href="overload4.html" title="basic_socket_acceptor::async_accept (4 of 8 overloads)"> 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="overload2.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../async_accept.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="overload4.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload3"></a><a class="link" href="overload3.html" title="basic_socket_acceptor::async_accept (3 of 8 overloads)">basic_socket_acceptor::async_accept 28 (3 of 8 overloads)</a> 29</h5></div></div></div> 30<p> 31 Start an asynchronous accept. 32 </p> 33<pre class="programlisting">template< 34 typename <a class="link" href="../../MoveAcceptHandler.html" title="Move accept handler requirements">MoveAcceptHandler</a> = <a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>> 35<a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_accept( 36 MoveAcceptHandler && handler = <a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>); 37</pre> 38<p> 39 This function is used to asynchronously accept a new connection. The 40 function call always returns immediately. 41 </p> 42<p> 43 This overload requires that the Protocol template parameter satisfy the 44 AcceptableProtocol type requirements. 45 </p> 46<h6> 47<a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload3.h0"></a> 48 <span class="phrase"><a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload3.parameters"></a></span><a class="link" href="overload3.html#boost_asio.reference.basic_socket_acceptor.async_accept.overload3.parameters">Parameters</a> 49 </h6> 50<div class="variablelist"> 51<p class="title"><b></b></p> 52<dl class="variablelist"> 53<dt><span class="term">handler</span></dt> 54<dd> 55<p> 56 The handler to be called when the accept operation completes. Copies 57 will be made of the handler as required. The function signature 58 of the handler must be: 59</p> 60<pre class="programlisting">void handler( 61 // Result of operation. 62 const boost::system::error_code& error, 63 // On success, the newly accepted socket. 64 typename Protocol::socket::template 65 rebind_executor<executor_type>::other peer 66); 67</pre> 68<p> 69 Regardless of whether the asynchronous operation completes immediately 70 or not, the handler will not be invoked from within this function. 71 On immediate completion, invocation of the handler will be performed 72 in a manner equivalent to using <a class="link" href="../../post.html" title="post"><code class="computeroutput">post</code></a>. 73 </p> 74</dd> 75</dl> 76</div> 77<h6> 78<a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload3.h1"></a> 79 <span class="phrase"><a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload3.example"></a></span><a class="link" href="overload3.html#boost_asio.reference.basic_socket_acceptor.async_accept.overload3.example">Example</a> 80 </h6> 81<pre class="programlisting">void accept_handler(const boost::system::error_code& error, 82 boost::asio::ip::tcp::socket peer) 83{ 84 if (!error) 85 { 86 // Accept succeeded. 87 } 88} 89 90... 91 92boost::asio::ip::tcp::acceptor acceptor(my_context); 93... 94acceptor.async_accept(accept_handler); 95</pre> 96</div> 97<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 98<td align="left"></td> 99<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 100 Kohlhoff<p> 101 Distributed under the Boost Software License, Version 1.0. (See accompanying 102 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>) 103 </p> 104</div></td> 105</tr></table> 106<hr> 107<div class="spirit-nav"> 108<a accesskey="p" href="overload2.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../async_accept.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="overload4.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 109</div> 110</body> 111</html> 112
