1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>asio_handler_is_continuation</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="asio_handler_invoke/overload2.html" title="asio_handler_invoke (2 of 2 overloads)"> 10<link rel="next" href="associated_allocator.html" title="associated_allocator"> 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="asio_handler_invoke/overload2.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="associated_allocator.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.asio_handler_is_continuation"></a><a class="link" href="asio_handler_is_continuation.html" title="asio_handler_is_continuation">asio_handler_is_continuation</a> 28</h3></div></div></div> 29<p> 30 <a class="indexterm" name="boost_asio.indexterm.asio_handler_is_continuation"></a> 31Default 32 continuation function for handlers. 33 </p> 34<pre class="programlisting">bool asio_handler_is_continuation( 35 ... ); 36</pre> 37<p> 38 Asynchronous operations may represent a continuation of the asynchronous 39 control flow associated with the current handler. The implementation can 40 use this knowledge to optimise scheduling of the handler. 41 </p> 42<p> 43 Implement asio_handler_is_continuation for your own handlers to indicate 44 when a handler represents a continuation. 45 </p> 46<p> 47 The default implementation of the continuation hook returns <code class="computeroutput">false</code>. 48 </p> 49<h5> 50<a name="boost_asio.reference.asio_handler_is_continuation.h0"></a> 51 <span class="phrase"><a name="boost_asio.reference.asio_handler_is_continuation.example"></a></span><a class="link" href="asio_handler_is_continuation.html#boost_asio.reference.asio_handler_is_continuation.example">Example</a> 52 </h5> 53<pre class="programlisting">class my_handler; 54 55bool asio_handler_is_continuation(my_handler* context) 56{ 57 return true; 58} 59</pre> 60<h5> 61<a name="boost_asio.reference.asio_handler_is_continuation.h1"></a> 62 <span class="phrase"><a name="boost_asio.reference.asio_handler_is_continuation.requirements"></a></span><a class="link" href="asio_handler_is_continuation.html#boost_asio.reference.asio_handler_is_continuation.requirements">Requirements</a> 63 </h5> 64<p> 65 <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/handler_continuation_hook.hpp</code> 66 </p> 67<p> 68 <span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code> 69 </p> 70</div> 71<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 72<td align="left"></td> 73<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 74 Kohlhoff<p> 75 Distributed under the Boost Software License, Version 1.0. (See accompanying 76 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>) 77 </p> 78</div></td> 79</tr></table> 80<hr> 81<div class="spirit-nav"> 82<a accesskey="p" href="asio_handler_invoke/overload2.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="associated_allocator.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 83</div> 84</body> 85</html> 86
