boost-react-native-bundle

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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Fork</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="../posix.html" title="POSIX-Specific Functionality"> <link rel="prev" href="stream_descriptor.html" title="Stream-Oriented File Descriptors"> <link rel="next" href="../windows.html" title="Windows-Specific Functionality"> </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="stream_descriptor.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../posix.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="../windows.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h4 class="title"> <a name="boost_asio.overview.posix.fork"></a><a class="link" href="fork.html" title="Fork">Fork</a> </h4></div></div></div> Boost.Asio supports programs that utilise the <code class="computeroutput">fork()</code> system call. Provided the program calls <code class="computeroutput">io_service.notify_fork()</code> at the appropriate times, Boost.Asio will recreate any internal file descriptors (such as the "self-pipe trick" descriptor used for waking up a reactor). The notification is usually performed as follows: <pre class="programlisting">io_service_.notify_fork(boost::asio::io_service::fork_prepare); if (fork() == 0) { io_service_.notify_fork(boost::asio::io_service::fork_child); ... } else { io_service_.notify_fork(boost::asio::io_service::fork_parent); ... } </pre> User-defined services can also be made fork-aware by overriding the <code class="computeroutput">io_service::service::fork_service()</code> virtual function. Note that any file descriptors accessible via Boost.Asio's public API (e.g. the descriptors underlying <code class="computeroutput">basic_socket<></code>, <code class="computeroutput">posix::stream_descriptor</code>, etc.) are not altered during a fork. It is the program's responsibility to manage these as required. <h6> <a name="boost_asio.overview.posix.fork.h0"></a> <a name="boost_asio.overview.posix.fork.see_also"></a><a class="link" href="fork.html#boost_asio.overview.posix.fork.see_also">See Also</a> </h6> <a class="link" href="../../reference/io_service/notify_fork.html" title="io_service::notify_fork">io_service::notify_fork()</a>, <a class="link" href="../../reference/io_service/fork_event.html" title="io_service::fork_event">io_service::fork_event</a>, <a class="link" href="../../reference/io_service__service/fork_service.html" title="io_service::service::fork_service">io_service::service::fork_service()</a>, <a class="link" href="../../examples/cpp03_examples.html#boost_asio.examples.cpp03_examples.fork">Fork examples</a>. </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 © 2003-2014 Christopher M. Kohlhoff 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>) </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="stream_descriptor.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../posix.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="../windows.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>