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Edit: libudev-udev-queue.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>udev_queue: libudev Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="index.html" title="libudev Reference Manual"> <link rel="up" href="ch01.html" title="API Reference"> <link rel="prev" href="libudev-udev-enumerate.html" title="udev_enumerate"> <link rel="next" href="libudev-udev-hwdb.html" title="udev_hwdb"> <meta name="generator" content="GTK-Doc V1.28 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#libudev-udev-queue.description" class="shortcut">Description</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="libudev-udev-enumerate.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="libudev-udev-hwdb.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="libudev-udev-queue"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="libudev-udev-queue.top_of_page"></a>udev_queue</span></h2> <p>udev_queue — access to currently active events</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="libudev-udev-queue.functions"></a><h2>Functions</h2> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="functions_return"> <col class="functions_name"> </colgroup> <tbody> <tr> <td class="function_type">struct <a class="link" href="libudev-udev-queue.html#udev-queue" title="struct udev_queue"><span class="returnvalue">udev_queue</span></a> * </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-ref" title="udev_queue_ref ()">udev_queue_ref</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">struct <a class="link" href="libudev-udev-queue.html#udev-queue" title="struct udev_queue"><span class="returnvalue">udev_queue</span></a> * </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-unref" title="udev_queue_unref ()">udev_queue_unref</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> * </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-udev" title="udev_queue_get_udev ()">udev_queue_get_udev</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">struct <a class="link" href="libudev-udev-queue.html#udev-queue" title="struct udev_queue"><span class="returnvalue">udev_queue</span></a> * </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-new" title="udev_queue_new ()">udev_queue_new</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-udev-is-active" title="udev_queue_get_udev_is_active ()">udev_queue_get_udev_is_active</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-queue-is-empty" title="udev_queue_get_queue_is_empty ()">udev_queue_get_queue_is_empty</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-seqnum-is-finished" title="udev_queue_get_seqnum_is_finished ()">udev_queue_get_seqnum_is_finished</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-seqnum-sequence-is-finished" title="udev_queue_get_seqnum_sequence_is_finished ()">udev_queue_get_seqnum_sequence_is_finished</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">struct <a class="link" href="libudev-udev-list.html#udev-list-entry" title="struct udev_list_entry"><span class="returnvalue">udev_list_entry</span></a> * </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-queued-list-entry" title="udev_queue_get_queued_list_entry ()">udev_queue_get_queued_list_entry</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">unsigned long long <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-kernel-seqnum" title="udev_queue_get_kernel_seqnum ()">udev_queue_get_kernel_seqnum</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">unsigned long long <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-udev-seqnum" title="udev_queue_get_udev_seqnum ()">udev_queue_get_udev_seqnum</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-get-fd" title="udev_queue_get_fd ()">udev_queue_get_fd</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="libudev-udev-queue.html#udev-queue-flush" title="udev_queue_flush ()">udev_queue_flush</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="libudev-udev-queue.other"></a><h2>Types and Values</h2> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="name"> <col class="description"> </colgroup> <tbody><tr> <td class="datatype_keyword">struct</td> <td class="function_name"><a class="link" href="libudev-udev-queue.html#udev-queue" title="struct udev_queue">udev_queue</a></td> </tr></tbody> </table></div> </div> <div class="refsect1"> <a name="libudev-udev-queue.description"></a><h2>Description</h2> <p>This exports the current state of the udev processing queue.</p> </div> <div class="refsect1"> <a name="libudev-udev-queue.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="udev-queue-ref"></a><h3>udev_queue_ref ()</h3> <pre class="programlisting">struct <a class="link" href="libudev-udev-queue.html#udev-queue" title="struct udev_queue"><span class="returnvalue">udev_queue</span></a> * udev_queue_ref (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>Take a reference of a udev queue context.</p> <div class="refsect3"> <a name="udev-queue-ref.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-ref.returns"></a><h4>Returns</h4> <p> the same udev queue context.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-unref"></a><h3>udev_queue_unref ()</h3> <pre class="programlisting">struct <a class="link" href="libudev-udev-queue.html#udev-queue" title="struct udev_queue"><span class="returnvalue">udev_queue</span></a> * udev_queue_unref (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>Drop a reference of a udev queue context. If the refcount reaches zero, the resources of the queue context will be released.</p> <div class="refsect3"> <a name="udev-queue-unref.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-unref.returns"></a><h4>Returns</h4> <p> <span class="type">NULL</span></p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-udev"></a><h3>udev_queue_get_udev ()</h3> <pre class="programlisting">struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> * udev_queue_get_udev (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>Retrieve the udev library context the queue context was created with.</p> <div class="refsect3"> <a name="udev-queue-get-udev.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-udev.returns"></a><h4>Returns</h4> <p> the udev library context.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-new"></a><h3>udev_queue_new ()</h3> <pre class="programlisting">struct <a class="link" href="libudev-udev-queue.html#udev-queue" title="struct udev_queue"><span class="returnvalue">udev_queue</span></a> * udev_queue_new (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre> <p>The initial refcount is 1, and needs to be decremented to release the resources of the udev queue context.</p> <div class="refsect3"> <a name="udev-queue-new.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev</p></td> <td class="parameter_description"><p>udev library context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-new.returns"></a><h4>Returns</h4> <p> the udev queue context, or <span class="type">NULL</span> on error.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-udev-is-active"></a><h3>udev_queue_get_udev_is_active ()</h3> <pre class="programlisting"><span class="returnvalue">int</span> udev_queue_get_udev_is_active (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>Check if udev is active on the system.</p> <div class="refsect3"> <a name="udev-queue-get-udev-is-active.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-udev-is-active.returns"></a><h4>Returns</h4> <p> a flag indicating if udev is active.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-queue-is-empty"></a><h3>udev_queue_get_queue_is_empty ()</h3> <pre class="programlisting"><span class="returnvalue">int</span> udev_queue_get_queue_is_empty (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>Check if udev is currently processing any events.</p> <div class="refsect3"> <a name="udev-queue-get-queue-is-empty.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-queue-is-empty.returns"></a><h4>Returns</h4> <p> a flag indicating if udev is currently handling events.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-seqnum-is-finished"></a><h3>udev_queue_get_seqnum_is_finished ()</h3> <pre class="programlisting"><span class="returnvalue">int</span> udev_queue_get_seqnum_is_finished (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>, <em class="parameter"><code>unsigned long long <span class="type">int</span> seqnum</code></em>);</pre> <p>This function is deprecated, it just returns the result of <a class="link" href="libudev-udev-queue.html#udev-queue-get-queue-is-empty" title="udev_queue_get_queue_is_empty ()"><code class="function">udev_queue_get_queue_is_empty()</code></a>.</p> <div class="refsect3"> <a name="udev-queue-get-seqnum-is-finished.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>seqnum</p></td> <td class="parameter_description"><p>sequence number</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-seqnum-is-finished.returns"></a><h4>Returns</h4> <p> a flag indicating if udev is currently handling events.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-seqnum-sequence-is-finished"></a><h3>udev_queue_get_seqnum_sequence_is_finished ()</h3> <pre class="programlisting"><span class="returnvalue">int</span> udev_queue_get_seqnum_sequence_is_finished (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>, <em class="parameter"><code>unsigned long long <span class="type">int</span> start</code></em>, <em class="parameter"><code>unsigned long long <span class="type">int</span> end</code></em>);</pre> <p>This function is deprecated, it just returns the result of <a class="link" href="libudev-udev-queue.html#udev-queue-get-queue-is-empty" title="udev_queue_get_queue_is_empty ()"><code class="function">udev_queue_get_queue_is_empty()</code></a>.</p> <div class="refsect3"> <a name="udev-queue-get-seqnum-sequence-is-finished.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>start</p></td> <td class="parameter_description"><p>first event sequence number</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>end</p></td> <td class="parameter_description"><p>last event sequence number</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-seqnum-sequence-is-finished.returns"></a><h4>Returns</h4> <p> a flag indicating if udev is currently handling events.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-queued-list-entry"></a><h3>udev_queue_get_queued_list_entry ()</h3> <pre class="programlisting">struct <a class="link" href="libudev-udev-list.html#udev-list-entry" title="struct udev_list_entry"><span class="returnvalue">udev_list_entry</span></a> * udev_queue_get_queued_list_entry (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>This function is deprecated.</p> <div class="refsect3"> <a name="udev-queue-get-queued-list-entry.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-queued-list-entry.returns"></a><h4>Returns</h4> <p> NULL.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-kernel-seqnum"></a><h3>udev_queue_get_kernel_seqnum ()</h3> <pre class="programlisting">unsigned long long <span class="returnvalue">int</span> udev_queue_get_kernel_seqnum (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>This function is deprecated.</p> <div class="refsect3"> <a name="udev-queue-get-kernel-seqnum.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-kernel-seqnum.returns"></a><h4>Returns</h4> <p> 0.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-udev-seqnum"></a><h3>udev_queue_get_udev_seqnum ()</h3> <pre class="programlisting">unsigned long long <span class="returnvalue">int</span> udev_queue_get_udev_seqnum (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <p>This function is deprecated.</p> <div class="refsect3"> <a name="udev-queue-get-udev-seqnum.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-udev-seqnum.returns"></a><h4>Returns</h4> <p> 0.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-get-fd"></a><h3>udev_queue_get_fd ()</h3> <pre class="programlisting"><span class="returnvalue">int</span> udev_queue_get_fd (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <div class="refsect3"> <a name="udev-queue-get-fd.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-get-fd.returns"></a><h4>Returns</h4> <p> a file descriptor to watch for a queue to become empty.</p> </div> </div> <hr> <div class="refsect2"> <a name="udev-queue-flush"></a><h3>udev_queue_flush ()</h3> <pre class="programlisting"><span class="returnvalue">int</span> udev_queue_flush (<em class="parameter"><code><span class="type">struct udev_queue</span> *udev_queue</code></em>);</pre> <div class="refsect3"> <a name="udev-queue-flush.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>udev_queue</p></td> <td class="parameter_description"><p>udev queue context</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="udev-queue-flush.returns"></a><h4>Returns</h4> <p> the result of clearing the watch for queue changes.</p> </div> </div> </div> <div class="refsect1"> <a name="libudev-udev-queue.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="udev-queue"></a><h3>struct udev_queue</h3> <pre class="programlisting">struct udev_queue;</pre> <p>Opaque object representing the current event queue in the udev daemon.</p> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.28</div> </body> </html>
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