<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>use_service</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="use_future_t/use_future_t/overload2.html" title="use_future_t::use_future_t (2 of 2 overloads)"> <link rel="next" href="wait_traits.html" title="wait_traits"> </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="use_future_t/use_future_t/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="wait_traits.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.use_service"></a><a class="link" href="use_service.html" title="use_service">use_service</a> </h3></div></div></div> <p> <a class="indexterm" name="idm45773590929584"></a> </p> <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> <span class="keyword">typename</span> <a class="link" href="Service.html" title="Service requirements">Service</a><span class="special">></span> <span class="identifier">Service</span> <span class="special">&</span> <span class="identifier">use_service</span><span class="special">(</span> <span class="identifier">io_service</span> <span class="special">&</span> <span class="identifier">ios</span><span class="special">);</span> </pre> <p> This function is used to locate a service object that corresponds to the given service type. If there is no existing implementation of the service, then the <a class="link" href="io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a> will create a new instance of the service. </p> <h5> <a name="boost_asio.reference.use_service.h0"></a> <span class="phrase"><a name="boost_asio.reference.use_service.parameters"></a></span><a class="link" href="use_service.html#boost_asio.reference.use_service.parameters">Parameters</a> </h5> <div class="variablelist"> <p class="title"><b></b></p> <dl class="variablelist"> <dt><span class="term">ios</span></dt> <dd><p> The <a class="link" href="io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a> object that owns the service. </p></dd> </dl> </div> <h5> <a name="boost_asio.reference.use_service.h1"></a> <span class="phrase"><a name="boost_asio.reference.use_service.return_value"></a></span><a class="link" href="use_service.html#boost_asio.reference.use_service.return_value">Return Value</a> </h5> <p> The service interface implementing the specified service type. Ownership of the service interface is not transferred to the caller. </p> <h5> <a name="boost_asio.reference.use_service.h2"></a> <span class="phrase"><a name="boost_asio.reference.use_service.requirements"></a></span><a class="link" href="use_service.html#boost_asio.reference.use_service.requirements">Requirements</a> </h5> <p> <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/io_service.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="use_future_t/use_future_t/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="wait_traits.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>