1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>dispatch (2 of 3 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="../dispatch.html" title="dispatch"> 9<link rel="prev" href="overload1.html" title="dispatch (1 of 3 overloads)"> 10<link rel="next" href="overload3.html" title="dispatch (3 of 3 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="overload1.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../dispatch.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="overload3.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="boost_asio.reference.dispatch.overload2"></a><a class="link" href="overload2.html" title="dispatch (2 of 3 overloads)">dispatch (2 28 of 3 overloads)</a> 29</h4></div></div></div> 30<p> 31 Submits a completion token or function object for execution. 32 </p> 33<pre class="programlisting">template< 34 typename <a class="link" href="../Executor1.html" title="Executor requirements">Executor</a>, 35 typename CompletionToken = <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> dispatch( 37 const Executor & ex, 38 CompletionToken && token = <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< execution::is_executor< Executor >::value||is_executor< Executor >::value >::type * = 0); 40</pre> 41<p> 42 This function submits an object for execution using the specified executor. 43 The function object may be called from the current thread prior to returning 44 from <code class="computeroutput">dispatch()</code>. Otherwise, it is queued for execution. 45 </p> 46<p> 47 This function has the following effects: 48 </p> 49<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 50<li class="listitem"> 51 Constructs a function object handler of type <code class="computeroutput">Handler</code>, 52 initialized with <code class="computeroutput">handler(forward<CompletionToken>(token))</code>. 53 </li> 54<li class="listitem"> 55 Constructs an object <code class="computeroutput">result</code> of type <code class="computeroutput">async_result<Handler></code>, 56 initializing the object as <code class="computeroutput">result(handler)</code>. 57 </li> 58<li class="listitem"> 59 Obtains the handler's associated executor object <code class="computeroutput">ex1</code> by 60 performing <code class="computeroutput">get_associated_executor(handler)</code>. 61 </li> 62<li class="listitem"> 63 Creates a work object <code class="computeroutput">w</code> by performing <code class="computeroutput">make_work(ex1)</code>. 64 </li> 65<li class="listitem"> 66 Obtains the handler's associated allocator object <code class="computeroutput">alloc</code> 67 by performing <code class="computeroutput">get_associated_allocator(handler)</code>. 68 </li> 69<li class="listitem"> 70 Constructs a function object <code class="computeroutput">f</code> with a function call operator 71 that performs <code class="computeroutput">ex1.dispatch(std::move(handler), alloc)</code> 72 followed by <code class="computeroutput">w.reset()</code>. 73 </li> 74<li class="listitem"> 75 Performs <code class="computeroutput">Executor(ex).dispatch(std::move(f), alloc)</code>. 76 </li> 77<li class="listitem"> 78 Returns <code class="computeroutput">result.get()</code>. 79 </li> 80</ul></div> 81</div> 82<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 83<td align="left"></td> 84<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 85 Kohlhoff<p> 86 Distributed under the Boost Software License, Version 1.0. (See accompanying 87 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>) 88 </p> 89</div></td> 90</tr></table> 91<hr> 92<div class="spirit-nav"> 93<a accesskey="p" href="overload1.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../dispatch.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="overload3.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 94</div> 95</body> 96</html> 97
