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<h2><span class="refentrytitle">Function template async_system</span></h2>
<p>boost::process::async_system</p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<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>>
</span>
<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>
<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>
<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>
<div class="refsect1">
<a name="id-1.3.31.9.5.4.4"></a><h2>Description</h2>
<p>This function provides an asynchronous interface to process launching.</p>
<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>
<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>
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<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>
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<td><p><span class="term">Parameters:</span></p></td>
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<td><p><span class="term"><code class="computeroutput">exit_handler</code></span></p></td>
<td><p>The exit-handler for the signature <code class="computeroutput">void(boost::system::error_code, int)</code></p></td>
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<td><p><span class="term"><code class="computeroutput">ios</code></span></p></td>
<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>
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