lugt
/
click_hdfs


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211
							<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Signal set service requirements</title>
<link rel="stylesheet" href="../../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
<link rel="home" href="../../index.html" title="Asio">
<link rel="up" href="../reference.html" title="Reference">
<link rel="prev" href="SignalHandler.html" title="Signal handler requirements">
<link rel="next" href="SocketAcceptorService.html" title="Socket acceptor service requirements">
</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="SignalHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="SocketAcceptorService.html"><img src="../../next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.SignalSetService"></a><a class="link" href="SignalSetService.html" title="Signal set service requirements">Signal set service requirements</a>
</h3></div></div></div>
<p>
        A signal set service must meet the requirements for an <a class="link" href="IoObjectService.html" title="I/O object service requirements">I/O
        object service</a>, as well as the additional requirements listed below.
      </p>
<p>
        In the table below, <code class="computeroutput"><span class="identifier">X</span></code> denotes
        a signal set service class, <code class="computeroutput"><span class="identifier">a</span></code>
        denotes a value of type <code class="computeroutput"><span class="identifier">X</span></code>,
        <code class="computeroutput"><span class="identifier">b</span></code> denotes a value of type
        <code class="computeroutput"><span class="identifier">X</span><span class="special">::</span><span class="identifier">implementation_type</span></code>, <code class="computeroutput"><span class="identifier">ec</span></code>
        denotes a value of type <code class="computeroutput"><span class="identifier">error_code</span></code>,
        <code class="computeroutput"><span class="identifier">n</span></code> denotes a value of type
        <code class="computeroutput"><span class="keyword">int</span></code>, and <code class="computeroutput"><span class="identifier">sh</span></code>
        denotes a value meeting <a class="link" href="SignalHandler.html" title="Signal handler requirements"><code class="computeroutput"><span class="identifier">SignalHandler</span></code></a> requirements.
      </p>
<div class="table">
<a name="asio.reference.SignalSetService.t0"></a><p class="title"><b>Table&#160;28.&#160;SignalSetService requirements</b></p>
<div class="table-contents"><table class="table" summary="SignalSetService requirements">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  expression
                </p>
              </th>
<th>
                <p>
                  return type
                </p>
              </th>
<th>
                <p>
                  assertion/note<br> pre/post-condition
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">construct</span><span class="special">(</span><span class="identifier">b</span><span class="special">);</span></code>
                </p>
              </td>
<td>
              </td>
<td>
                <p>
                  From <a class="link" href="IoObjectService.html" title="I/O object service requirements">IoObjectService</a>
                  requirements.<br>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">destroy</span><span class="special">(</span><span class="identifier">b</span><span class="special">);</span></code>
                </p>
              </td>
<td>
              </td>
<td>
                <p>
                  From <a class="link" href="IoObjectService.html" title="I/O object service requirements">IoObjectService</a>
                  requirements. Implicitly clears the registered signals as if by
                  calling <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">clear</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
                  <span class="identifier">ec</span><span class="special">)</span></code>,
                  then implicitly cancels outstanding asynchronous operations as
                  if by calling <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">cancel</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">)</span></code>.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
</p>
<pre class="programlisting"><span class="identifier">a</span><span class="special">.</span><span class="identifier">add</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
</pre>
<p>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">error_code</span></code>
                </p>
              </td>
<td>
              </td>
</tr>
<tr>
<td>
                <p>
</p>
<pre class="programlisting"><span class="identifier">a</span><span class="special">.</span><span class="identifier">remove</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
</pre>
<p>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">error_code</span></code>
                </p>
              </td>
<td>
              </td>
</tr>
<tr>
<td>
                <p>
</p>
<pre class="programlisting"><span class="identifier">a</span><span class="special">.</span><span class="identifier">clear</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
</pre>
<p>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">error_code</span></code>
                </p>
              </td>
<td>
              </td>
</tr>
<tr>
<td>
                <p>
</p>
<pre class="programlisting"><span class="identifier">a</span><span class="special">.</span><span class="identifier">cancel</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
</pre>
<p>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">error_code</span></code>
                </p>
              </td>
<td>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">async_wait</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
                  <span class="identifier">sh</span><span class="special">);</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="keyword">void</span></code>
                </p>
              </td>
<td>
                <p>
                  pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.<br>
                  <br> Initiates an asynchronous operation to wait for the delivery
                  of one of the signals registered for the signal set <code class="computeroutput"><span class="identifier">b</span></code>. The operation is performed
                  via the <code class="computeroutput"><span class="identifier">io_service</span></code>
                  object <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">get_io_service</span><span class="special">()</span></code>
                  and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
                  operation</a> requirements.<br> <br> If the operation completes
                  successfully, the <code class="computeroutput"><span class="identifier">SignalHandler</span></code>
                  object <code class="computeroutput"><span class="identifier">sh</span></code> is invoked
                  with the number identifying the delivered signal. Otherwise it
                  is invoked with <code class="computeroutput"><span class="number">0</span></code>.
                </p>
              </td>
</tr>
</tbody>
</table></div>
</div>
<br class="table-break">
</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 &#169; 2003-2014 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="SignalHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="SocketAcceptorService.html"><img src="../../next.png" alt="Next"></a>
</div>
</body>
</html>