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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Xenomai API: Interrupt management services</title>
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<h1>Interrupt management services<br>
<small>
[<a class="el" href="group__driverfacilities.html">Driver API.</a>]</small>
</h1>
<p>
<div class="dynheader">
Collaboration diagram for Interrupt management services:</div>
<div class="dynsection">
<center><table><tr><td><img src="group__analogy__interrupt.png" border="0" alt="" usemap="#group____analogy____interrupt_map">
<map name="group____analogy____interrupt_map">
<area shape="rect" href="group__driverfacilities.html" title="Driver API." alt="" coords="5,5,93,32"></map></td></tr></table></center>
</div>
<p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__analogy__interrupt.html#g482cc3464879c72b2359bd4b642f0a96">a4l_get_irq</a> (a4l_dev_t *dev)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the interrupt number in use for a specific device. <a href="#g482cc3464879c72b2359bd4b642f0a96"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__analogy__interrupt.html#g2a3eb695fa1f5f97c1d6829039979d54">a4l_request_irq</a> (a4l_dev_t *dev, unsigned int irq, a4l_irq_hdlr_t handler, unsigned long flags, void *cookie)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Register an interrupt handler for a specific device. <a href="#g2a3eb695fa1f5f97c1d6829039979d54"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__analogy__interrupt.html#g6377e1975bd391b58fbe3ddb2d2c2b8e">a4l_free_irq</a> (a4l_dev_t *dev, unsigned int irq)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Release an interrupt handler for a specific device. <a href="#g6377e1975bd391b58fbe3ddb2d2c2b8e"></a><br></td></tr>
</table>
<hr><h2>Function Documentation</h2>
<a class="anchor" name="g6377e1975bd391b58fbe3ddb2d2c2b8e"></a><!-- doxytag: member="driver_facilities.c::a4l_free_irq" ref="g6377e1975bd391b58fbe3ddb2d2c2b8e" args="(a4l_dev_t *dev, unsigned int irq)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int a4l_free_irq </td>
<td>(</td>
<td class="paramtype">a4l_dev_t * </td>
<td class="paramname"> <em>dev</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>irq</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Release an interrupt handler for a specific device.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>dev</em> </td><td>Device descriptor structure </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>irq</em> </td><td>Line number of the addressed IRQ</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success, otherwise negative error code. </dd></dl>
</div>
</div><p>
<a class="anchor" name="g482cc3464879c72b2359bd4b642f0a96"></a><!-- doxytag: member="driver_facilities.c::a4l_get_irq" ref="g482cc3464879c72b2359bd4b642f0a96" args="(a4l_dev_t *dev)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">unsigned int a4l_get_irq </td>
<td>(</td>
<td class="paramtype">a4l_dev_t * </td>
<td class="paramname"> <em>dev</em> </td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Get the interrupt number in use for a specific device.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>dev</em> </td><td>Device descriptor structure</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the line number used or A4L_IRQ_UNUSED if no interrupt is registered. </dd></dl>
</div>
</div><p>
<a class="anchor" name="g2a3eb695fa1f5f97c1d6829039979d54"></a><!-- doxytag: member="driver_facilities.c::a4l_request_irq" ref="g2a3eb695fa1f5f97c1d6829039979d54" args="(a4l_dev_t *dev, unsigned int irq, a4l_irq_hdlr_t handler, unsigned long flags, void *cookie)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int a4l_request_irq </td>
<td>(</td>
<td class="paramtype">a4l_dev_t * </td>
<td class="paramname"> <em>dev</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>irq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">a4l_irq_hdlr_t </td>
<td class="paramname"> <em>handler</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned long </td>
<td class="paramname"> <em>flags</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"> <em>cookie</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Register an interrupt handler for a specific device.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>dev</em> </td><td>Device descriptor structure </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>irq</em> </td><td>Line number of the addressed IRQ </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>handler</em> </td><td>Interrupt handler </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>flags</em> </td><td>Registration flags:<ul>
<li>A4L_IRQ_SHARED: enable IRQ-sharing with other drivers (Warning: real-time drivers and non-real-time drivers cannot share an interrupt line).</li><li>A4L_IRQ_EDGE: mark IRQ as edge-triggered (Warning: this flag is meaningless in RTDM-less context).</li><li>A4L_IRQ_DISABLED: keep IRQ disabled when calling the action handler (Warning: this flag is ignored in RTDM-enabled configuration). </li></ul>
</td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>cookie</em> </td><td>Pointer to be passed to the interrupt handler on invocation</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on success, otherwise negative error code. </dd></dl>
</div>
</div><p>
</div>
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