<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>execution_context::use_service (1 of 2 overloads)</title> <link rel="stylesheet" href="../../../../boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="../../../../index.html" title="Asio"> <link rel="up" href="../use_service.html" title="execution_context::use_service"> <link rel="prev" href="../use_service.html" title="execution_context::use_service"> <link rel="next" href="overload2.html" title="execution_context::use_service (2 of 2 overloads)"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../../asio.png"></td></tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="../use_service.html"><img src="../../../../prev.png" alt="Prev"></a><a accesskey="u" href="../use_service.html"><img src="../../../../up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../home.png" alt="Home"></a><a accesskey="n" href="overload2.html"><img src="../../../../next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h5 class="title"> <a name="asio.reference.execution_context.use_service.overload1"></a><a class="link" href="overload1.html" title="execution_context::use_service (1 of 2 overloads)">execution_context::use_service (1 of 2 overloads)</a> </h5></div></div></div> <p> Obtain the service object corresponding to the given type. </p> <pre class="programlisting">template< typename <a class="link" href="../../Service.html" title="Service requirements">Service</a>> friend Service & use_service( execution_context & e); </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="../../execution_context.html" title="execution_context"><code class="computeroutput">execution_context</code></a> will create a new instance of the service. </p> <h6> <a name="asio.reference.execution_context.use_service.overload1.h0"></a> <span><a name="asio.reference.execution_context.use_service.overload1.parameters"></a></span><a class="link" href="overload1.html#asio.reference.execution_context.use_service.overload1.parameters">Parameters</a> </h6> <div class="variablelist"> <p class="title"><b></b></p> <dl> <dt><span class="term">e</span></dt> <dd><p> The <a class="link" href="../../execution_context.html" title="execution_context"><code class="computeroutput">execution_context</code></a> object that owns the service. </p></dd> </dl> </div> <h6> <a name="asio.reference.execution_context.use_service.overload1.h1"></a> <span><a name="asio.reference.execution_context.use_service.overload1.return_value"></a></span><a class="link" href="overload1.html#asio.reference.execution_context.use_service.overload1.return_value">Return Value</a> </h6> <p> The service interface implementing the specified service type. Ownership of the service interface is not transferred to the caller. </p> <h6> <a name="asio.reference.execution_context.use_service.overload1.h2"></a> <span><a name="asio.reference.execution_context.use_service.overload1.requirements"></a></span><a class="link" href="overload1.html#asio.reference.execution_context.use_service.overload1.requirements">Requirements</a> </h6> <p> <span class="emphasis"><em>Header: </em></span><code class="literal">asio/execution_context.hpp</code> </p> <p> <span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio/execution.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 © 2003-2020 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_service.html"><img src="../../../../prev.png" alt="Prev"></a><a accesskey="u" href="../use_service.html"><img src="../../../../up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../home.png" alt="Home"></a><a accesskey="n" href="overload2.html"><img src="../../../../next.png" alt="Next"></a> </div> </body> </html>