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| <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> |
| <a href="#gstreamer-GstPoll.description" class="shortcut">Description</a></span> |
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| <div class="refentry"> |
| <a name="gstreamer-GstPoll"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gstreamer-GstPoll.top_of_page"></a>GstPoll</span></h2> |
| <p>GstPoll — Keep track of file descriptors and make it possible |
| to wait on them in a cancellable way</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstPoll.functions"></a><h2>Functions</h2> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="functions_return"> |
| <col class="functions_name"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-add-fd" title="gst_poll_add_fd ()">gst_poll_add_fd</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-can-read" title="gst_poll_fd_can_read ()">gst_poll_fd_can_read</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-can-write" title="gst_poll_fd_can_write ()">gst_poll_fd_can_write</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-ctl-read" title="gst_poll_fd_ctl_read ()">gst_poll_fd_ctl_read</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-ctl-write" title="gst_poll_fd_ctl_write ()">gst_poll_fd_ctl_write</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-has-closed" title="gst_poll_fd_has_closed ()">gst_poll_fd_has_closed</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-has-error" title="gst_poll_fd_has_error ()">gst_poll_fd_has_error</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-ignored" title="gst_poll_fd_ignored ()">gst_poll_fd_ignored</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-init" title="gst_poll_fd_init ()">gst_poll_fd_init</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-free" title="gst_poll_free ()">gst_poll_free</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="returnvalue">GstPoll</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new" title="gst_poll_new ()">gst_poll_new</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="returnvalue">GstPoll</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new-timer" title="gst_poll_new_timer ()">gst_poll_new_timer</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-get-read-gpollfd" title="gst_poll_get_read_gpollfd ()">gst_poll_get_read_gpollfd</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-remove-fd" title="gst_poll_remove_fd ()">gst_poll_remove_fd</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-restart" title="gst_poll_restart ()">gst_poll_restart</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-set-controllable" title="gst_poll_set_controllable ()">gst_poll_set_controllable</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-set-flushing" title="gst_poll_set_flushing ()">gst_poll_set_flushing</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()">gst_poll_wait</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-read-control" title="gst_poll_read_control ()">gst_poll_read_control</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-write-control" title="gst_poll_write_control ()">gst_poll_write_control</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstPoll.other"></a><h2>Types and Values</h2> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="name"> |
| <col class="description"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="datatype_keyword"> </td> |
| <td class="function_name"><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll">GstPoll</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword"> </td> |
| <td class="function_name"><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD">GstPollFD</a></td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"><a class="link" href="gstreamer-GstPoll.html#GST-POLL-FD-INIT:CAPS" title="GST_POLL_FD_INIT">GST_POLL_FD_INIT</a></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstPoll.includes"></a><h2>Includes</h2> |
| <pre class="synopsis">#include <gst/gst.h> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstPoll.description"></a><h2>Description</h2> |
| <p>A <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> keeps track of file descriptors much like fd_set (used with |
| <code class="function">select()</code>) or a struct pollfd array (used with <code class="function">poll()</code>). Once created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new" title="gst_poll_new ()"><code class="function">gst_poll_new()</code></a>, the set can be used to wait for file descriptors to be |
| readable and/or writable. It is possible to make this wait be controlled |
| by specifying <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for the <em class="parameter"><code>controllable</code></em> |
| flag when creating the set (or |
| later calling <a class="link" href="gstreamer-GstPoll.html#gst-poll-set-controllable" title="gst_poll_set_controllable ()"><code class="function">gst_poll_set_controllable()</code></a>).</p> |
| <p>New file descriptors are added to the set using <a class="link" href="gstreamer-GstPoll.html#gst-poll-add-fd" title="gst_poll_add_fd ()"><code class="function">gst_poll_add_fd()</code></a>, and |
| removed using <a class="link" href="gstreamer-GstPoll.html#gst-poll-remove-fd" title="gst_poll_remove_fd ()"><code class="function">gst_poll_remove_fd()</code></a>. Controlling which file descriptors |
| should be waited for to become readable and/or writable are done using |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-ctl-read" title="gst_poll_fd_ctl_read ()"><code class="function">gst_poll_fd_ctl_read()</code></a> and <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-ctl-write" title="gst_poll_fd_ctl_write ()"><code class="function">gst_poll_fd_ctl_write()</code></a>.</p> |
| <p>Use <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> to wait for the file descriptors to actually become |
| readable and/or writable, or to timeout if no file descriptor is available |
| in time. The wait can be controlled by calling <a class="link" href="gstreamer-GstPoll.html#gst-poll-restart" title="gst_poll_restart ()"><code class="function">gst_poll_restart()</code></a> and |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-set-flushing" title="gst_poll_set_flushing ()"><code class="function">gst_poll_set_flushing()</code></a>.</p> |
| <p>Once the file descriptor set has been waited for, one can use |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-has-closed" title="gst_poll_fd_has_closed ()"><code class="function">gst_poll_fd_has_closed()</code></a> to see if the file descriptor has been closed, |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-has-error" title="gst_poll_fd_has_error ()"><code class="function">gst_poll_fd_has_error()</code></a> to see if it has generated an error, |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-can-read" title="gst_poll_fd_can_read ()"><code class="function">gst_poll_fd_can_read()</code></a> to see if it is possible to read from the file |
| descriptor, and <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-can-write" title="gst_poll_fd_can_write ()"><code class="function">gst_poll_fd_can_write()</code></a> to see if it is possible to |
| write to it.</p> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstPoll.functions_details"></a><h2>Functions</h2> |
| <div class="refsect2"> |
| <a name="gst-poll-add-fd"></a><h3>gst_poll_add_fd ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_add_fd (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Add a file descriptor to the file descriptor set.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-add-fd.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-add-fd.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the file descriptor was successfully added to the set.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-can-read"></a><h3>gst_poll_fd_can_read ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_fd_can_read (<em class="parameter"><code>const <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Check if <em class="parameter"><code>fd</code></em> |
| in <em class="parameter"><code>set</code></em> |
| has data to be read.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-can-read.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-can-read.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the descriptor has data to be read.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-can-write"></a><h3>gst_poll_fd_can_write ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_fd_can_write (<em class="parameter"><code>const <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Check if <em class="parameter"><code>fd</code></em> |
| in <em class="parameter"><code>set</code></em> |
| can be used for writing.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-can-write.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-can-write.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the descriptor can be used for writing.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-ctl-read"></a><h3>gst_poll_fd_ctl_read ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_fd_ctl_read (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> active</code></em>);</pre> |
| <p>Control whether the descriptor <em class="parameter"><code>fd</code></em> |
| in <em class="parameter"><code>set</code></em> |
| will be monitored for |
| readability.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-ctl-read.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>active</p></td> |
| <td class="parameter_description"><p>a new status.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-ctl-read.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the descriptor was successfully updated.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-ctl-write"></a><h3>gst_poll_fd_ctl_write ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_fd_ctl_write (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> active</code></em>);</pre> |
| <p>Control whether the descriptor <em class="parameter"><code>fd</code></em> |
| in <em class="parameter"><code>set</code></em> |
| will be monitored for |
| writability.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-ctl-write.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>active</p></td> |
| <td class="parameter_description"><p>a new status.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-ctl-write.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the descriptor was successfully updated.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-has-closed"></a><h3>gst_poll_fd_has_closed ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_fd_has_closed (<em class="parameter"><code>const <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Check if <em class="parameter"><code>fd</code></em> |
| in <em class="parameter"><code>set</code></em> |
| has closed the connection.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-has-closed.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-has-closed.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the connection was closed.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-has-error"></a><h3>gst_poll_fd_has_error ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_fd_has_error (<em class="parameter"><code>const <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Check if <em class="parameter"><code>fd</code></em> |
| in <em class="parameter"><code>set</code></em> |
| has an error.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-has-error.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-has-error.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the descriptor has an error.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-ignored"></a><h3>gst_poll_fd_ignored ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_poll_fd_ignored (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Mark <em class="parameter"><code>fd</code></em> |
| as ignored so that the next call to <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> will yield |
| the same result for <em class="parameter"><code>fd</code></em> |
| as last time. This function must be called if no |
| operation (read/write/recv/send/etc.) will be performed on <em class="parameter"><code>fd</code></em> |
| before |
| the next call to <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a>.</p> |
| <p>The reason why this is needed is because the underlying implementation |
| might not allow querying the fd more than once between calls to one of |
| the re-enabling operations.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-ignored.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-fd-init"></a><h3>gst_poll_fd_init ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_poll_fd_init (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Initializes <em class="parameter"><code>fd</code></em> |
| . Alternatively you can initialize it with |
| <a class="link" href="gstreamer-GstPoll.html#GST-POLL-FD-INIT:CAPS" title="GST_POLL_FD_INIT"><span class="type">GST_POLL_FD_INIT</span></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-fd-init.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>fd</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-free"></a><h3>gst_poll_free ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_poll_free (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>);</pre> |
| <p>Free a file descriptor set.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-free.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p> a file descriptor set. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-new"></a><h3>gst_poll_new ()</h3> |
| <pre class="programlisting"><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="returnvalue">GstPoll</span></a> * |
| gst_poll_new (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> controllable</code></em>);</pre> |
| <p>Create a new file descriptor set. If <em class="parameter"><code>controllable</code></em> |
| , it |
| is possible to restart or flush a call to <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-restart" title="gst_poll_restart ()"><code class="function">gst_poll_restart()</code></a> and <a class="link" href="gstreamer-GstPoll.html#gst-poll-set-flushing" title="gst_poll_set_flushing ()"><code class="function">gst_poll_set_flushing()</code></a> respectively.</p> |
| <p>Free-function: gst_poll_free</p> |
| <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p> |
| <div class="refsect3"> |
| <a name="gst-poll-new.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>controllable</p></td> |
| <td class="parameter_description"><p>whether it should be possible to control a wait.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-new.returns"></a><h4>Returns</h4> |
| <p> a new <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>, or <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> in |
| case of an error. Free with <a class="link" href="gstreamer-GstPoll.html#gst-poll-free" title="gst_poll_free ()"><code class="function">gst_poll_free()</code></a>. </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-new-timer"></a><h3>gst_poll_new_timer ()</h3> |
| <pre class="programlisting"><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="returnvalue">GstPoll</span></a> * |
| gst_poll_new_timer (<em class="parameter"><code><span class="type">void</span></code></em>);</pre> |
| <p>Create a new poll object that can be used for scheduling cancellable |
| timeouts.</p> |
| <p>A timeout is performed with <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a>. Multiple timeouts can be |
| performed from different threads. </p> |
| <p>Free-function: gst_poll_free</p> |
| <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p> |
| <div class="refsect3"> |
| <a name="gst-poll-new-timer.returns"></a><h4>Returns</h4> |
| <p> a new <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>, or <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> in |
| case of an error. Free with <a class="link" href="gstreamer-GstPoll.html#gst-poll-free" title="gst_poll_free ()"><code class="function">gst_poll_free()</code></a>. </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-get-read-gpollfd"></a><h3>gst_poll_get_read_gpollfd ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_poll_get_read_gpollfd (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-The-Main-Event-Loop.html#GPollFD"><span class="type">GPollFD</span></a> *fd</code></em>);</pre> |
| <p>Get a GPollFD for the reading part of the control socket. This is useful when |
| integrating with a GSource and GMainLoop.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-get-read-gpollfd.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/glibglib-The-Main-Event-Loop.html#GPollFD"><span class="type">GPollFD</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-remove-fd"></a><h3>gst_poll_remove_fd ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_remove_fd (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> *fd</code></em>);</pre> |
| <p>Remove a file descriptor from the file descriptor set.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-remove-fd.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a file descriptor set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>fd</p></td> |
| <td class="parameter_description"><p>a file descriptor.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-remove-fd.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the file descriptor was successfully removed from the set.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-restart"></a><h3>gst_poll_restart ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_poll_restart (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>);</pre> |
| <p>Restart any <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> that is in progress. This function is typically |
| used after adding or removing descriptors to <em class="parameter"><code>set</code></em> |
| .</p> |
| <p>If <em class="parameter"><code>set</code></em> |
| is not controllable, then this call will have no effect.</p> |
| <p>This function only works for non-timer <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new" title="gst_poll_new ()"><code class="function">gst_poll_new()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-restart.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-set-controllable"></a><h3>gst_poll_set_controllable ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_set_controllable (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> controllable</code></em>);</pre> |
| <p>When <em class="parameter"><code>controllable</code></em> |
| is <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, this function ensures that future calls to |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> will be affected by <a class="link" href="gstreamer-GstPoll.html#gst-poll-restart" title="gst_poll_restart ()"><code class="function">gst_poll_restart()</code></a> and |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-set-flushing" title="gst_poll_set_flushing ()"><code class="function">gst_poll_set_flushing()</code></a>.</p> |
| <p>This function only works for non-timer <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new" title="gst_poll_new ()"><code class="function">gst_poll_new()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-set-controllable.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>controllable</p></td> |
| <td class="parameter_description"><p>new controllable state.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-set-controllable.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the controllability of <em class="parameter"><code>set</code></em> |
| could be updated.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-set-flushing"></a><h3>gst_poll_set_flushing ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_poll_set_flushing (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> flushing</code></em>);</pre> |
| <p>When <em class="parameter"><code>flushing</code></em> |
| is <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, this function ensures that current and future calls |
| to <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> will return -1, with errno set to EBUSY.</p> |
| <p>Unsetting the flushing state will restore normal operation of <em class="parameter"><code>set</code></em> |
| .</p> |
| <p>This function only works for non-timer <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new" title="gst_poll_new ()"><code class="function">gst_poll_new()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-set-flushing.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flushing</p></td> |
| <td class="parameter_description"><p>new flushing state.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-wait"></a><h3>gst_poll_wait ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> |
| gst_poll_wait (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>, |
| <em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timeout</code></em>);</pre> |
| <p>Wait for activity on the file descriptors in <em class="parameter"><code>set</code></em> |
| . This function waits up to |
| the specified <em class="parameter"><code>timeout</code></em> |
| . A timeout of <a class="link" href="GstClock.html#GST-CLOCK-TIME-NONE:CAPS" title="GST_CLOCK_TIME_NONE"><span class="type">GST_CLOCK_TIME_NONE</span></a> waits forever.</p> |
| <p>For <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with <a class="link" href="gstreamer-GstPoll.html#gst-poll-new" title="gst_poll_new ()"><code class="function">gst_poll_new()</code></a>, this function can only be |
| called from a single thread at a time. If called from multiple threads, |
| -1 will be returned with errno set to EPERM.</p> |
| <p>This is not true for timer <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new-timer" title="gst_poll_new_timer ()"><code class="function">gst_poll_new_timer()</code></a>, where it is allowed to have multiple threads waiting |
| simultaneously.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-wait.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>timeout</p></td> |
| <td class="parameter_description"><p>a timeout in nanoseconds.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-wait.returns"></a><h4>Returns</h4> |
| <p> The number of <a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> in <em class="parameter"><code>set</code></em> |
| that have activity or 0 when no |
| activity was detected after <em class="parameter"><code>timeout</code></em> |
| . If an error occurs, -1 is returned |
| and errno is set.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-read-control"></a><h3>gst_poll_read_control ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_read_control (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>);</pre> |
| <p>Read a byte from the control socket of the controllable <em class="parameter"><code>set</code></em> |
| .</p> |
| <p>This function only works for timer <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new-timer" title="gst_poll_new_timer ()"><code class="function">gst_poll_new_timer()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-read-control.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-read-control.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success. <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> when when there was no byte to read or |
| reading the byte failed. If there was no byte to read, and only then, errno |
| will contain EWOULDBLOCK or EAGAIN. For all other values of errno this always signals a |
| critical error.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-poll-write-control"></a><h3>gst_poll_write_control ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_poll_write_control (<em class="parameter"><code><a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> *set</code></em>);</pre> |
| <p>Write a byte to the control socket of the controllable <em class="parameter"><code>set</code></em> |
| . |
| This function is mostly useful for timer <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new-timer" title="gst_poll_new_timer ()"><code class="function">gst_poll_new_timer()</code></a>. </p> |
| <p>It will make any current and future <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> function return with |
| 1, meaning the control socket is set. After an equal amount of calls to |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-read-control" title="gst_poll_read_control ()"><code class="function">gst_poll_read_control()</code></a> have been performed, calls to <a class="link" href="gstreamer-GstPoll.html#gst-poll-wait" title="gst_poll_wait ()"><code class="function">gst_poll_wait()</code></a> will |
| block again until their timeout expired.</p> |
| <p>This function only works for timer <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a> objects created with |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-new-timer" title="gst_poll_new_timer ()"><code class="function">gst_poll_new_timer()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-poll-write-control.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" 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>set</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstPoll.html#GstPoll" title="GstPoll"><span class="type">GstPoll</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-poll-write-control.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success. <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> when when the byte could not be written. |
| errno contains the detailed error code but will never be EAGAIN, EINTR or |
| EWOULDBLOCK. <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> always signals a critical error.</p> |
| </div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstPoll.other_details"></a><h2>Types and Values</h2> |
| <div class="refsect2"> |
| <a name="GstPoll"></a><h3>GstPoll</h3> |
| <pre class="programlisting">typedef struct _GstPoll GstPoll;</pre> |
| <p>A set of file/network descriptors.</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstPollFD"></a><h3>GstPollFD</h3> |
| <pre class="programlisting">typedef struct { |
| int fd; |
| } GstPollFD; |
| </pre> |
| <p>A file descriptor object.</p> |
| <div class="refsect3"> |
| <a name="GstPollFD.members"></a><h4>Members</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="300px" class="struct_members_name"> |
| <col class="struct_members_description"> |
| <col width="200px" class="struct_members_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="GstPollFD.fd"></a>fd</code></em>;</p></td> |
| <td class="struct_member_description"><p>a file descriptor</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-POLL-FD-INIT:CAPS"></a><h3>GST_POLL_FD_INIT</h3> |
| <pre class="programlisting">#define GST_POLL_FD_INIT { -1, -1 } |
| </pre> |
| <p>A <a class="link" href="gstreamer-GstPoll.html#GstPollFD" title="GstPollFD"><span class="type">GstPollFD</span></a> must be initialized with this macro, before it can be |
| used. This macro can used be to initialize a variable, but it cannot |
| be assigned to a variable. In that case you have to use |
| <a class="link" href="gstreamer-GstPoll.html#gst-poll-fd-init" title="gst_poll_fd_init ()"><code class="function">gst_poll_fd_init()</code></a>.</p> |
| </div> |
| </div> |
| </div> |
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| <hr>Generated by GTK-Doc V1.25</div> |
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