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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_asio.reference.CompletionHandler"></a><a class="link" href="CompletionHandler.html" title="Completion handler requirements">Completion handler |
| requirements</a> |
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| <p> |
| A completion handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>. |
| A value <code class="computeroutput"><span class="identifier">h</span></code> of a completion |
| handler class should work correctly in the expression <code class="computeroutput"><span class="identifier">h</span><span class="special">()</span></code>. |
| </p> |
| <a name="boost_asio.reference.CompletionHandler.examples"></a><h5> |
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| <a class="link" href="CompletionHandler.html#boost_asio.reference.CompletionHandler.examples">Examples</a> |
| </h5> |
| <p> |
| A free function as a completion handler: |
| </p> |
| <pre class="programlisting"><span class="keyword">void</span> <span class="identifier">completion_handler</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="special">...</span> |
| <span class="special">}</span> |
| </pre> |
| <p> |
| A completion handler function object: |
| </p> |
| <pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">completion_handler</span> |
| <span class="special">{</span> |
| <span class="special">...</span> |
| <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()()</span> |
| <span class="special">{</span> |
| <span class="special">...</span> |
| <span class="special">}</span> |
| <span class="special">...</span> |
| <span class="special">};</span> |
| </pre> |
| <p> |
| A non-static class member function adapted to a completion handler using |
| <code class="computeroutput"><span class="identifier">bind</span><span class="special">()</span></code>: |
| </p> |
| <pre class="programlisting"><span class="keyword">void</span> <span class="identifier">my_class</span><span class="special">::</span><span class="identifier">completion_handler</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="special">...</span> |
| <span class="special">}</span> |
| <span class="special">...</span> |
| <span class="identifier">my_io_service</span><span class="special">.</span><span class="identifier">post</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&</span><span class="identifier">my_class</span><span class="special">::</span><span class="identifier">completion_handler</span><span class="special">,</span> <span class="keyword">this</span><span class="special">));</span> |
| </pre> |
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| <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>) |
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