1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>basic_socket_acceptor::async_accept (6 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="overload5.html" title="basic_socket_acceptor::async_accept (5 of 8 overloads)"> 10<link rel="next" href="overload7.html" title="basic_socket_acceptor::async_accept (7 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="overload5.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="overload7.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.overload6"></a><a class="link" href="overload6.html" title="basic_socket_acceptor::async_accept (6 of 8 overloads)">basic_socket_acceptor::async_accept 28 (6 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 endpoint_type & peer_endpoint, 37 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>); 38</pre> 39<p> 40 This function is used to asynchronously accept a new connection. The 41 function call always returns immediately. 42 </p> 43<p> 44 This overload requires that the Protocol template parameter satisfy the 45 AcceptableProtocol type requirements. 46 </p> 47<h6> 48<a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload6.h0"></a> 49 <span class="phrase"><a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload6.parameters"></a></span><a class="link" href="overload6.html#boost_asio.reference.basic_socket_acceptor.async_accept.overload6.parameters">Parameters</a> 50 </h6> 51<div class="variablelist"> 52<p class="title"><b></b></p> 53<dl class="variablelist"> 54<dt><span class="term">peer_endpoint</span></dt> 55<dd><p> 56 An endpoint object into which the endpoint of the remote peer will 57 be written. Ownership of the peer_endpoint object is retained by 58 the caller, which must guarantee that it is valid until the handler 59 is called. 60 </p></dd> 61<dt><span class="term">handler</span></dt> 62<dd> 63<p> 64 The handler to be called when the accept operation completes. Copies 65 will be made of the handler as required. The function signature 66 of the handler must be: 67</p> 68<pre class="programlisting">void handler( 69 // Result of operation. 70 const boost::system::error_code& error, 71 // On success, the newly accepted socket. 72 typename Protocol::socket::template 73 rebind_executor<executor_type>::other peer 74); 75</pre> 76<p> 77 Regardless of whether the asynchronous operation completes immediately 78 or not, the handler will not be invoked from within this function. 79 On immediate completion, invocation of the handler will be performed 80 in a manner equivalent to using <a class="link" href="../../post.html" title="post"><code class="computeroutput">post</code></a>. 81 </p> 82</dd> 83</dl> 84</div> 85<h6> 86<a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload6.h1"></a> 87 <span class="phrase"><a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload6.example"></a></span><a class="link" href="overload6.html#boost_asio.reference.basic_socket_acceptor.async_accept.overload6.example">Example</a> 88 </h6> 89<pre class="programlisting">void accept_handler(const boost::system::error_code& error, 90 boost::asio::ip::tcp::socket peer) 91{ 92 if (!error) 93 { 94 // Accept succeeded. 95 } 96} 97 98... 99 100boost::asio::ip::tcp::acceptor acceptor(my_context); 101... 102boost::asio::ip::tcp::endpoint endpoint; 103acceptor.async_accept(endpoint, accept_handler); 104</pre> 105</div> 106<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 107<td align="left"></td> 108<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 109 Kohlhoff<p> 110 Distributed under the Boost Software License, Version 1.0. (See accompanying 111 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>) 112 </p> 113</div></td> 114</tr></table> 115<hr> 116<div class="spirit-nav"> 117<a accesskey="p" href="overload5.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="overload7.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 118</div> 119</body> 120</html> 121
