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| <a href="#GstTaskPool.synopsis" class="shortcut">Top</a> |
| | |
| <a href="#GstTaskPool.description" class="shortcut">Description</a> |
| | |
| <a href="#GstTaskPool.object-hierarchy" class="shortcut">Object Hierarchy</a> |
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| <div class="refentry"> |
| <a name="GstTaskPool"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="GstTaskPool.top_of_page"></a>GstTaskPool</span></h2> |
| <p>GstTaskPool — Pool of GStreamer streaming threads</p> |
| </td> |
| <td valign="top" align="right"></td> |
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| <div class="refsynopsisdiv"> |
| <a name="GstTaskPool.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> |
| #include <gst/gst.h> |
| |
| struct <a class="link" href="GstTaskPool.html#GstTaskPool-struct" title="struct GstTaskPool">GstTaskPool</a>; |
| struct <a class="link" href="GstTaskPool.html#GstTaskPoolClass" title="struct GstTaskPoolClass">GstTaskPoolClass</a>; |
| <span class="returnvalue">void</span> (<a class="link" href="GstTaskPool.html#GstTaskPoolFunction" title="GstTaskPoolFunction ()">*GstTaskPoolFunction</a>) (<em class="parameter"><code><span class="type">void</span> *user_data</code></em>); |
| <a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="returnvalue">GstTaskPool</span></a> * <a class="link" href="GstTaskPool.html#gst-task-pool-new" title="gst_task_pool_new ()">gst_task_pool_new</a> (<em class="parameter"><code><span class="type">void</span></code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstTaskPool.html#gst-task-pool-prepare" title="gst_task_pool_prepare ()">gst_task_pool_prepare</a> (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> <a class="link" href="GstTaskPool.html#gst-task-pool-push" title="gst_task_pool_push ()">gst_task_pool_push</a> (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>, |
| <em class="parameter"><code><a class="link" href="GstTaskPool.html#GstTaskPoolFunction" title="GstTaskPoolFunction ()"><span class="type">GstTaskPoolFunction</span></a> func</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstTaskPool.html#gst-task-pool-join" title="gst_task_pool_join ()">gst_task_pool_join</a> (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> id</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstTaskPool.html#gst-task-pool-cleanup" title="gst_task_pool_cleanup ()">gst_task_pool_cleanup</a> (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GstTaskPool.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="synopsis"> |
| <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a> |
| +----<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> |
| +----<a class="link" href="GstObject.html" title="GstObject">GstObject</a> |
| +----GstTaskPool |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GstTaskPool.description"></a><h2>Description</h2> |
| <p> |
| This object provides an abstraction for creating threads. The default |
| implementation uses a regular GThreadPool to start tasks. |
| </p> |
| <p> |
| Subclasses can be made to create custom threads. |
| </p> |
| <p> |
| Last reviewed on 2009-04-23 (0.10.24) |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a name="GstTaskPool.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="GstTaskPool-struct"></a><h3>struct GstTaskPool</h3> |
| <pre class="programlisting">struct GstTaskPool;</pre> |
| <p> |
| The <a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> object. |
| </p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstTaskPoolClass"></a><h3>struct GstTaskPoolClass</h3> |
| <pre class="programlisting">struct GstTaskPoolClass { |
| GstObjectClass parent_class; |
| |
| void (*prepare) (GstTaskPool *pool, GError **error); |
| void (*cleanup) (GstTaskPool *pool); |
| |
| gpointer (*push) (GstTaskPool *pool, GstTaskPoolFunction func, |
| gpointer user_data, GError **error); |
| void (*join) (GstTaskPool *pool, gpointer id); |
| }; |
| </pre> |
| <p> |
| The <a class="link" href="GstTaskPool.html#GstTaskPoolClass" title="struct GstTaskPoolClass"><span class="type">GstTaskPoolClass</span></a> object. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><a class="link" href="GstObject.html#GstObjectClass" title="struct GstObjectClass"><span class="type">GstObjectClass</span></a> <em class="structfield"><code><a name="GstTaskPoolClass.parent-class"></a>parent_class</code></em>;</span></p></td> |
| <td>the parent class structure</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstTaskPoolClass.prepare"></a>prepare</code></em> ()</span></p></td> |
| <td>prepare the threadpool</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstTaskPoolClass.cleanup"></a>cleanup</code></em> ()</span></p></td> |
| <td>make sure all threads are stopped</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstTaskPoolClass.push"></a>push</code></em> ()</span></p></td> |
| <td>start a new thread</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstTaskPoolClass.join"></a>join</code></em> ()</span></p></td> |
| <td>join a thread</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstTaskPoolFunction"></a><h3>GstTaskPoolFunction ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> (*GstTaskPoolFunction) (<em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre> |
| <p> |
| Task function, see <a class="link" href="GstTaskPool.html#gst-task-pool-push" title="gst_task_pool_push ()"><code class="function">gst_task_pool_push()</code></a>. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td> |
| <td>user data for the task function</td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-task-pool-new"></a><h3>gst_task_pool_new ()</h3> |
| <pre class="programlisting"><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="returnvalue">GstTaskPool</span></a> * gst_task_pool_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre> |
| <p> |
| Create a new default task pool. The default task pool will use a regular |
| GThreadPool for threads. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>a new <a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a>. <a class="link" href="GstObject.html#gst-object-unref" title="gst_object_unref ()"><code class="function">gst_object_unref()</code></a> after usage. <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> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-task-pool-prepare"></a><h3>gst_task_pool_prepare ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_task_pool_prepare (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre> |
| <p> |
| Prepare the taskpool for accepting <a class="link" href="GstTaskPool.html#gst-task-pool-push" title="gst_task_pool_push ()"><code class="function">gst_task_pool_push()</code></a> operations. |
| </p> |
| <p> |
| MT safe. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>pool</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td> |
| <td>an error return location</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-task-pool-push"></a><h3>gst_task_pool_push ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> gst_task_pool_push (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>, |
| <em class="parameter"><code><a class="link" href="GstTaskPool.html#GstTaskPoolFunction" title="GstTaskPoolFunction ()"><span class="type">GstTaskPoolFunction</span></a> func</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre> |
| <p> |
| Start the execution of a new thread from <em class="parameter"><code>pool</code></em>. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>pool</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> |
| <td>the function to call. <span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td> |
| <td>data to pass to <em class="parameter"><code>func</code></em>. <span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td> |
| <td>return location for an error</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>a pointer that should be used for the |
| gst_task_pool_join function. This pointer can be NULL, you must |
| check <em class="parameter"><code>error</code></em> to detect errors. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-task-pool-join"></a><h3>gst_task_pool_join ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_task_pool_join (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> id</code></em>);</pre> |
| <p> |
| Join a task and/or return it to the pool. <em class="parameter"><code>id</code></em> is the id obtained from |
| <a class="link" href="GstTaskPool.html#gst-task-pool-push" title="gst_task_pool_push ()"><code class="function">gst_task_pool_push()</code></a>. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>pool</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>id</code></em> :</span></p></td> |
| <td>the id</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-task-pool-cleanup"></a><h3>gst_task_pool_cleanup ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_task_pool_cleanup (<em class="parameter"><code><a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> *pool</code></em>);</pre> |
| <p> |
| Wait for all tasks to be stopped. This is mainly used internally |
| to ensure proper cleanup of internal data structures in test suites. |
| </p> |
| <p> |
| MT safe. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term"><em class="parameter"><code>pool</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstTaskPool.html" title="GstTaskPool"><span class="type">GstTaskPool</span></a> |
| </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="GstTaskPool.see-also"></a><h2>See Also</h2> |
| <a class="link" href="GstTask.html" title="GstTask"><span class="type">GstTask</span></a>, <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> |
| </div> |
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