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7<title>Cancel</title>
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10<h1><CODE>nn::boss::Task::Cancel</CODE> Member Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14<a href="../../../nn/Result/Overview.html">nn::Result</a> Cancel(
15void
16);
17</pre>
18    </div>
19<h2>Arguments</h2>
20    <div class="section">
21<p>None.</p>
22    </div>
23<h2>Return Values</h2>
24<div class="section">Returns the function's execution result. Returns one of the <a href="../../../nn/Result/Overview.html"><CODE>Result</CODE></A> values listed below. <br />
25      <table class="arguments">
26        <thead>
27          <tr>
28<th>Value</th>
29<td>Description</td>
30          </tr>
31        </thead>
32        <tr>
33<th><CODE>ResultSuccess</CODE></th>
34<td>Successfully cancelled the running task.</td>
35        </tr>
36        <tr>
37<th><CODE>ResultInvalidTaskId</CODE></th>
38<td>The task ID pointer is <CODE>NULL</CODE> or a zero-length string.</td>
39        </tr>
40        <tr>
41<th><CODE>ResultTaskNotExist</CODE></th>
42<td>The specified task ID was not found. Confirm whether registered.</td>
43        </tr>
44        <tr>
45<th><CODE>ResultIpcNotSessionInitialized</CODE></th>
46<td>Either a session had not been initialized or there were incompatible permissions. This <CODE>Result</CODE> is returned if this function is called before either the <A><CODE>Initialize</CODE></A> or the <CODE>InitializePriviledged</CODE> function is called. When using the BOSS library, always begin by calling either the <A><CODE>Initialize</CODE></A> or the <CODE>InitializePriviledged</CODE> function.</td>
47        </tr>
48        <tr>
49<th>A value other than the above.</th>
50<td>Unexpected error (see <CODE>boss_Result.h</CODE> for error details).</td>
51        </tr>
52      </table> </div>
53<h2>Description</h2>
54    <div class="section">
55<p>Cancels a running task. You can use the <a href="../../../nn/boss/Task/Start.html"><CODE>Start</CODE></a> function to restart a task that has been canceled. For the cancel state task, calling the <A><CODE>GetState</CODE></A> function will return <span>TASK_STOPPED</span> as the task state.</p><!-- write here --></div>
56<h2>Revision History</h2>
57    <div class="section">
58      <dl class="history">
59        <dt>2010/09/16</dt>
60<dd>Initial version.<br />
61        </dd>
62      </dl>
63    </div>
64  <hr><p>CONFIDENTIAL</p></body>
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