1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>basic_socket_acceptor::async_accept (4 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="overload3.html" title="basic_socket_acceptor::async_accept (3 of 8 overloads)"> 10<link rel="next" href="overload5.html" title="basic_socket_acceptor::async_accept (5 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="overload3.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="overload5.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.overload4"></a><a class="link" href="overload4.html" title="basic_socket_acceptor::async_accept (4 of 8 overloads)">basic_socket_acceptor::async_accept 28 (4 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="../../Executor1.html" title="Executor requirements">Executor1</a>, 35 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>> 36<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( 37 const Executor1 & ex, 38 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>, 39 typename enable_if< is_executor< Executor1 >::value||execution::is_executor< Executor1 >::value >::type * = 0); 40</pre> 41<p> 42 This function is used to asynchronously accept a new connection. The 43 function call always returns immediately. 44 </p> 45<p> 46 This overload requires that the Protocol template parameter satisfy the 47 AcceptableProtocol type requirements. 48 </p> 49<h6> 50<a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload4.h0"></a> 51 <span class="phrase"><a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload4.parameters"></a></span><a class="link" href="overload4.html#boost_asio.reference.basic_socket_acceptor.async_accept.overload4.parameters">Parameters</a> 52 </h6> 53<div class="variablelist"> 54<p class="title"><b></b></p> 55<dl class="variablelist"> 56<dt><span class="term">ex</span></dt> 57<dd><p> 58 The I/O executor object to be used for the newly accepted socket. 59 </p></dd> 60<dt><span class="term">handler</span></dt> 61<dd> 62<p> 63 The handler to be called when the accept operation completes. Copies 64 will be made of the handler as required. The function signature 65 of the handler must be: 66</p> 67<pre class="programlisting">void handler( 68 const boost::system::error_code& error, // Result of operation. 69 typename Protocol::socket::template rebind_executor< 70 Executor1>::other peer // On success, the newly accepted socket. 71); 72</pre> 73<p> 74 Regardless of whether the asynchronous operation completes immediately 75 or not, the handler will not be invoked from within this function. 76 On immediate completion, invocation of the handler will be performed 77 in a manner equivalent to using <a class="link" href="../../post.html" title="post"><code class="computeroutput">post</code></a>. 78 </p> 79</dd> 80</dl> 81</div> 82<h6> 83<a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload4.h1"></a> 84 <span class="phrase"><a name="boost_asio.reference.basic_socket_acceptor.async_accept.overload4.example"></a></span><a class="link" href="overload4.html#boost_asio.reference.basic_socket_acceptor.async_accept.overload4.example">Example</a> 85 </h6> 86<pre class="programlisting">void accept_handler(const boost::system::error_code& error, 87 boost::asio::ip::tcp::socket peer) 88{ 89 if (!error) 90 { 91 // Accept succeeded. 92 } 93} 94 95... 96 97boost::asio::ip::tcp::acceptor acceptor(my_context); 98... 99acceptor.async_accept(my_context2, accept_handler); 100</pre> 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="overload3.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="overload5.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 114</div> 115</body> 116</html> 117
