etActiveIRQ </td>
          <td>(</td>
          <td class="paramtype">void&#160;</td>
          <td class="paramname"></td><td>)</td>
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<dl class="section return"><dt>Returns</dt><dd>interrupt ID number.</dd></dl>
<p>This function retrieves the interrupt ID number of current IRQ source and acknowledges the interrupt.</p>
<p>For Arm GIC the default implementation looks like the following example:</p>
<div class="fragment"><div class="