1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Function template async_system</title> 6<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="../../process/reference.html#header.boost.process.async_system_hpp" title="Header <boost/process/async_system.hpp>"> 10<link rel="prev" href="async_pipe.html" title="Class async_pipe"> 11<link rel="next" href="child.html" title="Class child"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> 16<td align="center"><a href="../../../../index.html">Home</a></td> 17<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> 18<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 19<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 20<td align="center"><a href="../../../../more/index.htm">More</a></td> 21</tr></table> 22<hr> 23<div class="spirit-nav"> 24<a accesskey="p" href="async_pipe.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../process/reference.html#header.boost.process.async_system_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="child.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.process.async_system"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Function template async_system</span></h2> 30<p>boost::process::async_system</p> 31</div> 32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 33<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../process/reference.html#header.boost.process.async_system_hpp" title="Header <boost/process/async_system.hpp>">boost/process/async_system.hpp</a>> 34 35</span> 36<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ExitHandler<span class="special">,</span> <span class="keyword">typename</span> <span class="special">...</span> Args<span class="special">></span> 37 <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="identifier">async_system</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_context</span> <span class="special">&</span> ios<span class="special">,</span> 38 <span class="identifier">ExitHandler</span> <span class="special">&&</span> exit_handler<span class="special">,</span> <span class="identifier">Args</span> <span class="special">&&</span><span class="special">...</span> args<span class="special">)</span><span class="special">;</span></pre></div> 39<div class="refsect1"> 40<a name="id-1.3.30.9.5.4.4"></a><h2>Description</h2> 41<p>This function provides an asynchronous interface to process launching.</p> 42<p>It uses the same properties and parameters as the other launching function, but is similar to the asynchronous functions in <a href="http://www.boost.org/doc/libs/release/doc/html/boost_asio.html" target="_top">boost.asio</a></p> 43<p>It uses <a href="http://www.boost.org/doc/libs/release/doc/html/boost_asio/reference/async_result.html" target="_top">asio::async_result</a> to determine the return value (from the second parameter, <code class="computeroutput">exit_handler</code>).</p> 44<p> 45</p> 46<div class="note"><table border="0" summary="Note"> 47<tr> 48<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> 49<th align="left">Note</th> 50</tr> 51<tr><td align="left" valign="top"><p>This function does not allow custom error handling, since those are done through the <code class="computeroutput">exit_handler</code>. </p></td></tr> 52</table></div> 53<p> 54</p> 55<div class="variablelist"><table border="0" class="variablelist compact"> 56<colgroup> 57<col align="left" valign="top"> 58<col> 59</colgroup> 60<tbody><tr> 61<td><p><span class="term">Parameters:</span></p></td> 62<td><div class="variablelist"><table border="0" class="variablelist compact"> 63<colgroup> 64<col align="left" valign="top"> 65<col> 66</colgroup> 67<tbody> 68<tr> 69<td><p><span class="term"><code class="computeroutput">exit_handler</code></span></p></td> 70<td><p>The exit-handler for the signature <code class="computeroutput">void(boost::system::error_code, int)</code></p></td> 71</tr> 72<tr> 73<td><p><span class="term"><code class="computeroutput">ios</code></span></p></td> 74<td><p>A reference to an <a href="http://www.boost.org/doc/libs/release/doc/html/boost_asio/reference.html" target="_top">io_context</a> </p></td> 75</tr> 76</tbody> 77</table></div></td> 78</tr></tbody> 79</table></div> 80</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 © 2006-2012 Julio M. Merino Vidal, Ilya Sokolov, 85 Felipe Tanus, Jeff Flinn, Boris Schaeling<br>Copyright © 2016 Klemens D. Morgenstern<p> 86 Distributed under the Boost Software License, Version 1.0. (See accompanying 87 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 88 </p> 89</div></td> 90</tr></table> 91<hr> 92<div class="spirit-nav"> 93<a accesskey="p" href="async_pipe.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../process/reference.html#header.boost.process.async_system_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="child.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 94</div> 95</body> 96</html> 97
