<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>asio_handler_is_continuation</title> <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../../boost_asio.html" title="Boost.Asio"> <link rel="up" href="../reference.html" title="Reference"> <link rel="prev" href="asio_handler_invoke/overload2.html" title="asio_handler_invoke (2 of 2 overloads)"> <link rel="next" href="async_connect.html" title="async_connect"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> <td align="center"><a href="../../../../index.html">Home</a></td> <td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <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="async_connect.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> <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> </h3></div></div></div> <p> <a class="indexterm" name="idm45773674918624"></a> Default continuation function for handlers. </p> <pre class="programlisting"><span class="keyword">bool</span> <span class="identifier">asio_handler_is_continuation</span><span class="special">(</span> <span class="special">...</span> <span class="special">);</span> </pre> <p> Asynchronous operations may represent a continuation of the asynchronous control flow associated with the current handler. The implementation can use this knowledge to optimise scheduling of the handler. </p> <p> Implement asio_handler_is_continuation for your own handlers to indicate when a handler represents a continuation. </p> <p> The default implementation of the continuation hook returns <code class="computeroutput"><span class="keyword">false</span></code>. </p> <h5> <a name="boost_asio.reference.asio_handler_is_continuation.h0"></a> <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> </h5> <pre class="programlisting"><span class="keyword">class</span> <span class="identifier">my_handler</span><span class="special">;</span> <span class="keyword">bool</span> <span class="identifier">asio_handler_is_continuation</span><span class="special">(</span><span class="identifier">my_handler</span><span class="special">*</span> <span class="identifier">context</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="keyword">true</span><span class="special">;</span> <span class="special">}</span> </pre> <h5> <a name="boost_asio.reference.asio_handler_is_continuation.h1"></a> <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> </h5> <p> <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/handler_continuation_hook.hpp</code> </p> <p> <span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code> </p> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2003-2015 Christopher M. Kohlhoff<p> Distributed under the Boost Software License, Version 1.0. (See accompanying 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>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <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="async_connect.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>