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7<TITLE>OS_CancelAlarm</TITLE>
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11<H1 align="left">OS_CancelAlarm <IMG src="../../image/NTR.gif" align="middle"><IMG src="../../image/TWL.gif" align="middle"></H1>
12<H2>Syntax</H2>
13<DL>
14  <DD>
15  <PRE><CODE>#include &lt;nitro/os.h&gt;</CODE></PRE>
16  <PRE><CODE>void OS_CancelAlarm( OSAlarm* alarm );
17  </CODE></PRE>
18</DL>
19<H2>Arguments</H2>
20<TABLE border="1" width="100%">
21  <TBODY>
22    <TR>
23      <TD width="13%"><EM><STRONG>alarm</STRONG></EM></TD>
24      <TD width="87%">Pointer to the alarm structure  to cancel</TD>
25    </TR>
26  </TBODY>
27</TABLE>
28<H2>Return Values</H2>
29<P>None.</P>
30<H2>Description</H2>
31<P>This function cancels an alarm. After the alarm has been cancelled, the alarm structure can be used for another alarm.</P>
32<P>A periodic alarm that was activated by <CODE><A href="OS_SetPeriodicAlarm.html">OS_SetPeriodicAlarm</A></CODE> can cancel itself from within the alarm handler.</P>
33<H2>See Also</H2>
34<P><CODE><A href="OS_InitAlarm.html">OS_InitAlarm</A></CODE>, <CODE><A href="OS_CancelAlarms.html">OS_CancelAlarms</A></CODE>, <CODE><A href="OS_CancelAllAlarms.html">OS_CancelAllAlarms</A></CODE>, <CODE><A href="OS_SetPeriodicAlarm.html">OS_SetPeriodicAlarm</A></CODE></P>
35<H2>Revision History</H2>
36<P>2004/03/22 Added that a periodic alarm can cancel itself.<BR>2004/02/04 Initial version.</P>
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