<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>io_service::~io_service</title>
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2">
<link rel="start" href="../../../index.html" title="Asio">
<link rel="up" href="../io_service.html" title="io_service">
<link rel="prev" href="wrap.html" title="io_service::wrap">
<link rel="next" href="../io_service__id.html" title="io_service::id">
</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="wrap.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../io_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="../io_service__id.html"><img src="../../../next.png" alt="Next"></a>
</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h4 class="title">
<a name="asio.reference.io_service._io_service"></a><a class="link" href="_io_service.html" title="io_service::~io_service"> io_service::~io_service</a>
</h4></div></div></div>
<p>
<a class="indexterm" name="id847812"></a>
Destructor.
</p>
<pre class="programlisting"><span class="special">~</span><span class="identifier">io_service</span><span class="special">();</span>
</pre>
<p>
On destruction, the <a class="link" href="../io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a> performs the following
sequence of operations:
</p>
<div class="itemizedlist"><ul type="disc">
<li>
For each service object <code class="computeroutput"><span class="identifier">svc</span></code>
in the <a class="link" href="../io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a>
set, in reverse order of the beginning of service object lifetime, performs
<code class="computeroutput"><span class="identifier">svc</span><span class="special">-></span><span class="identifier">shutdown_service</span><span class="special">()</span></code>.
</li>
<li>
Uninvoked handler objects that were scheduled for deferred invocation
on the <a class="link" href="../io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a>,
or any associated strand, are destroyed.
</li>
<li>
For each service object <code class="computeroutput"><span class="identifier">svc</span></code>
in the <a class="link" href="../io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a>
set, in reverse order of the beginning of service object lifetime, performs
<code class="computeroutput"><span class="keyword">delete</span> <span class="keyword">static_cast</span><span class="special"><</span><span class="identifier">io_service</span><span class="special">::</span><span class="identifier">service</span><span class="special">*>(</span><span class="identifier">svc</span><span class="special">)</span></code>.
</li>
</ul></div>
<a name="asio.reference.io_service._io_service.remarks"></a><h6>
<a name="id848023"></a>
<a class="link" href="_io_service.html#asio.reference.io_service._io_service.remarks">Remarks</a>
</h6>
<p>
The destruction sequence described above permits programs to simplify their
resource management by using <code class="computeroutput"><span class="identifier">shared_ptr</span><span class="special"><></span></code>. Where an object's lifetime is
tied to the lifetime of a connection (or some other sequence of asynchronous
operations), a <code class="computeroutput"><span class="identifier">shared_ptr</span></code>
to the object would be bound into the handlers for all asynchronous operations
associated with it. This works as follows:
</p>
<div class="itemizedlist"><ul type="disc">
<li>
When a single connection ends, all associated asynchronous operations
complete. The corresponding handler objects are destroyed, and all <code class="computeroutput"><span class="identifier">shared_ptr</span></code> references to the objects
are destroyed.
</li>
<li>
To shut down the whole program, the <a class="link" href="../io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a> function <code class="computeroutput"><span class="identifier">stop</span><span class="special">()</span></code>
is called to terminate any <code class="computeroutput"><span class="identifier">run</span><span class="special">()</span></code> calls as soon as possible. The <a class="link" href="../io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a>
destructor defined above destroys all handlers, causing all <code class="computeroutput"><span class="identifier">shared_ptr</span></code> references to all connection
objects to be destroyed.
</li>
</ul></div>
</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 - 2010 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="wrap.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../io_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="../io_service__id.html"><img src="../../../next.png" alt="Next"></a>
</div>
</body>
</html>
distrib
>
Mageia
>
1
>
i586
>
media
>
core-release
>
by-pkgid
>
2deed065cd3adb9905decb703c6b0100
>
files
>
1476
