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7<title>SockAtMark</title>
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10<h1><CODE>nn::socket::SockAtMark</CODE> Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14s32 SockAtMark(
15     s32 s
16);
17</pre>
18    </div>
19<h2>Arguments</h2>
20    <div class="section">
21      <table class="arguments">
22        <thead>
23          <tr>
24            <td width="15" />
25<th>Name</th>
26<td>Description</td>
27          </tr>
28        </thead>
29        <tr>
30<td>in</td>
31<th>s</th>
32<td>Specifies the socket descriptor. Specify a socket descriptor created using the <a href="../../nn/socket/Socket.html"><CODE>Socket</CODE></a> or <a href="../../nn/socket/Accept.html"><CODE>Accept</CODE></a> function.</td>
33        </tr> </table>
34    </div>
35<h2>Return Values</h2>
36<div class="section">Returns <CODE>1</CODE> when a mark has been made indicating the socket has received out-of-band data. You can read the out-of-band data by calling the <a href="../../nn/socket/Recv.html"><CODE>Recv</CODE></a> function with <CODE>MSG_OOB</CODE> specified right after you call this function. If the protocol is TCP, this indicates that the last byte of urgent data exists at the start of the readable buffer. </div>
37<h2>Description</h2>
38    <div class="section">
39<p>Determines whether the specified socket has an out-of-band data mark.</p><p>This can be used to check whether the start of the socket's readable buffer is the last byte of TCP urgent data.</p><!-- write here --></div>
40<h2>See Also</h2>
41    <div class="section">
42<p class="reference"><a href="../../nn/socket/Recv.html"><CODE>Recv</CODE></a>, <a href="../../nn/socket/RecvFrom.html"><CODE>RecvFrom</CODE></a><br /> </p>
43    </div>
44<h2>Revision History</h2>
45    <div class="section">
46      <dl class="history">
47        <dt>2010/06/14</dt>
48<dd>Initial version.<br />
49        </dd>
50      </dl>
51    </div>
52  <hr><p>CONFIDENTIAL</p></body>
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