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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>GIOScheduler: GIO Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="GIO Reference Manual"> <link rel="up" href="async.html" title="Asynchronous I/O"> <link rel="prev" href="GTask.html" title="GTask"> <link rel="next" href="GSimpleAsyncResult.html" title="GSimpleAsyncResult"> <meta name="generator" content="GTK-Doc V1.32 (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="#gio-GIOScheduler.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="async.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="GTask.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="GSimpleAsyncResult.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="gio-GIOScheduler"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="gio-GIOScheduler.top_of_page"></a>GIOScheduler</span></h2> <p>GIOScheduler — I/O Scheduler</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="gio-GIOScheduler.functions"></a><h2>Functions</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="functions_proto_type"> <col class="functions_proto_name"> </colgroup> <tbody> <tr> <td class="function_type"> <span class="returnvalue">gboolean</span> </td> <td class="function_name"> <span class="c_punctuation">(</span><a class="link" href="gio-GIOScheduler.html#GIOSchedulerJobFunc" title="GIOSchedulerJobFunc ()">*GIOSchedulerJobFunc</a><span class="c_punctuation">)</span> <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="gio-GIOScheduler.html#g-io-scheduler-push-job" title="g_io_scheduler_push_job ()">g_io_scheduler_push_job</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="gio-GIOScheduler.html#g-io-scheduler-cancel-all-jobs" title="g_io_scheduler_cancel_all_jobs ()">g_io_scheduler_cancel_all_jobs</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">gboolean</span> </td> <td class="function_name"> <a class="link" href="gio-GIOScheduler.html#g-io-scheduler-job-send-to-mainloop" title="g_io_scheduler_job_send_to_mainloop ()">g_io_scheduler_job_send_to_mainloop</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="gio-GIOScheduler.html#g-io-scheduler-job-send-to-mainloop-async" title="g_io_scheduler_job_send_to_mainloop_async ()">g_io_scheduler_job_send_to_mainloop_async</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="gio-GIOScheduler.other"></a><h2>Types and Values</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="other_proto_type"> <col class="other_proto_name"> </colgroup> <tbody><tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="gio-GIOScheduler.html#GIOSchedulerJob" title="GIOSchedulerJob">GIOSchedulerJob</a></td> </tr></tbody> </table></div> </div> <div class="refsect1"> <a name="gio-GIOScheduler.includes"></a><h2>Includes</h2> <pre class="synopsis">#include <gio/gio.h> </pre> </div> <div class="refsect1"> <a name="gio-GIOScheduler.description"></a><h2>Description</h2> <p>As of GLib 2.36, <span class="type">GIOScheduler</span> is deprecated in favor of <span class="type">GThreadPool</span> and <a class="link" href="GTask.html" title="GTask"><span class="type">GTask</span></a>.</p> <p>Schedules asynchronous I/O operations. <span class="type">GIOScheduler</span> integrates into the main event loop (<span class="type">GMainLoop</span>) and uses threads.</p> </div> <div class="refsect1"> <a name="gio-GIOScheduler.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="GIOSchedulerJobFunc"></a><h3>GIOSchedulerJobFunc ()</h3> <pre class="programlisting"><span class="returnvalue">gboolean</span> <span class="c_punctuation">(</span>*GIOSchedulerJobFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="gio-GIOScheduler.html#GIOSchedulerJob" title="GIOSchedulerJob"><span class="type">GIOSchedulerJob</span></a> *job</code></em>, <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>, <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre> <p>I/O Job function.</p> <p>Long-running jobs should periodically check the <em class="parameter"><code>cancellable</code></em> to see if they have been cancelled.</p> <div class="refsect3"> <a name="GIOSchedulerJobFunc.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>job</p></td> <td class="parameter_description"><p>a <a class="link" href="gio-GIOScheduler.html#GIOSchedulerJob" title="GIOSchedulerJob"><span class="type">GIOSchedulerJob</span></a>.</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>cancellable</p></td> <td class="parameter_description"><p>optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <code class="literal">NULL</code> to ignore.</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>user_data</p></td> <td class="parameter_description"><p>the data to pass to callback function</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="GIOSchedulerJobFunc.returns"></a><h4>Returns</h4> <p> <code class="literal">TRUE</code> if this function should be called again to complete the job, <code class="literal">FALSE</code> if the job is complete (or cancelled)</p> </div> </div> <hr> <div class="refsect2"> <a name="g-io-scheduler-push-job"></a><h3>g_io_scheduler_push_job ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> g_io_scheduler_push_job (<em class="parameter"><code><a class="link" href="gio-GIOScheduler.html#GIOSchedulerJobFunc" title="GIOSchedulerJobFunc ()"><span class="type">GIOSchedulerJobFunc</span></a> job_func</code></em>, <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>, <em class="parameter"><code><span class="type">GDestroyNotify</span> notify</code></em>, <em class="parameter"><code><span class="type">gint</span> io_priority</code></em>, <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>);</pre> <div class="warning"> <p><code class="literal">g_io_scheduler_push_job</code> is deprecated and should not be used in newly-written code.</p> <p>use <span class="type">GThreadPool</span> or <a class="link" href="GTask.html#g-task-run-in-thread" title="g_task_run_in_thread ()"><code class="function">g_task_run_in_thread()</code></a></p> </div> <p>Schedules the I/O job to run in another thread.</p> <p><em class="parameter"><code>notify</code></em> will be called on <em class="parameter"><code>user_data</code></em> after <em class="parameter"><code>job_func</code></em> has returned, regardless whether the job was cancelled or has run to completion.</p> <p>If <em class="parameter"><code>cancellable</code></em> is not <code class="literal">NULL</code>, it can be used to cancel the I/O job by calling <a class="link" href="GCancellable.html#g-cancellable-cancel" title="g_cancellable_cancel ()"><code class="function">g_cancellable_cancel()</code></a> or by calling <a class="link" href="gio-GIOScheduler.html#g-io-scheduler-cancel-all-jobs" title="g_io_scheduler_cancel_all_jobs ()"><code class="function">g_io_scheduler_cancel_all_jobs()</code></a>.</p> <div class="refsect3"> <a name="g-io-scheduler-push-job.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>job_func</p></td> <td class="parameter_description"><p>a <a class="link" href="gio-GIOScheduler.html#GIOSchedulerJobFunc" title="GIOSchedulerJobFunc ()"><span class="type">GIOSchedulerJobFunc</span></a>.</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>user_data</p></td> <td class="parameter_description"><p>data to pass to <em class="parameter"><code>job_func</code></em> </p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>notify</p></td> <td class="parameter_description"><p>a <span class="type">GDestroyNotify</span> for <em class="parameter"><code>user_data</code></em> , or <code class="literal">NULL</code>. </p></td> <td class="parameter_annotations"><span class="annotation">[<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></td> </tr> <tr> <td class="parameter_name"><p>io_priority</p></td> <td class="parameter_description"><p>the <a class="link" href="GAsyncResult.html#io-priority" title="I/O Priority">I/O priority</a> of the request.</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>cancellable</p></td> <td class="parameter_description"><p>optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <code class="literal">NULL</code> to ignore.</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> </div> <hr> <div class="refsect2"> <a name="g-io-scheduler-cancel-all-jobs"></a><h3>g_io_scheduler_cancel_all_jobs ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> g_io_scheduler_cancel_all_jobs (<em class="parameter"><code><span class="type">void</span></code></em>);</pre> <div class="warning"> <p><code class="literal">g_io_scheduler_cancel_all_jobs</code> is deprecated and should not be used in newly-written code.</p> <p>You should never call this function, since you don't know how other libraries in your program might be making use of gioscheduler.</p> </div> <p>Cancels all cancellable I/O jobs. </p> <p>A job is cancellable if a <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> was passed into <a class="link" href="gio-GIOScheduler.html#g-io-scheduler-push-job" title="g_io_scheduler_push_job ()"><code class="function">g_io_scheduler_push_job()</code></a>.</p> </div> <hr> <div class="refsect2"> <a name="g-io-scheduler-job-send-to-mainloop"></a><h3>g_io_scheduler_job_send_to_mainloop ()</h3> <pre class="programlisting"><span class="returnvalue">gboolean</span> g_io_scheduler_job_send_to_mainloop (<em class="parameter"><code><a class="link" href="gio-GIOScheduler.html#GIOSchedulerJob" title="GIOSchedulerJob"><span class="type">GIOSchedulerJob</span></a> *job</code></em>, <em class="parameter"><code><span class="type">GSourceFunc</span> func</code></em>, <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>, <em class="parameter"><code><span class="type">GDestroyNotify</span> notify</code></em>);</pre> <div class="warning"> <p><code class="literal">g_io_scheduler_job_send_to_mainloop</code> is deprecated and should not be used in newly-written code.</p> <p>Use <code class="function">g_main_context_invoke()</code>.</p> </div> <p>Used from an I/O job to send a callback to be run in the thread that the job was started from, waiting for the result (and thus blocking the I/O job).</p> <div class="refsect3"> <a name="g-io-scheduler-job-send-to-mainloop.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>job</p></td> <td class="parameter_description"><p>a <a class="link" href="gio-GIOScheduler.html#GIOSchedulerJob" title="GIOSchedulerJob"><span class="type">GIOSchedulerJob</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>func</p></td> <td class="parameter_description"><p>a <span class="type">GSourceFunc</span> callback that will be called in the original thread</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>user_data</p></td> <td class="parameter_description"><p>data to pass to <em class="parameter"><code>func</code></em> </p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>notify</p></td> <td class="parameter_description"><p>a <span class="type">GDestroyNotify</span> for <em class="parameter"><code>user_data</code></em> , or <code class="literal">NULL</code>. </p></td> <td class="parameter_annotations"><span class="annotation">[<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></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="g-io-scheduler-job-send-to-mainloop.returns"></a><h4>Returns</h4> <p> The return value of <em class="parameter"><code>func</code></em> </p> </div> </div> <hr> <div class="refsect2"> <a name="g-io-scheduler-job-send-to-mainloop-async"></a><h3>g_io_scheduler_job_send_to_mainloop_async ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> g_io_scheduler_job_send_to_mainloop_async (<em class="parameter"><code><a class="link" href="gio-GIOScheduler.html#GIOSchedulerJob" title="GIOSchedulerJob"><span class="type">GIOSchedulerJob</span></a> *job</code></em>, <em class="parameter"><code><span class="type">GSourceFunc</span> func</code></em>, <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>, <em class="parameter"><code><span class="type">GDestroyNotify</span> notify</code></em>);</pre> <div class="warning"> <p><code class="literal">g_io_scheduler_job_send_to_mainloop_async</code> is deprecated and should not be used in newly-written code.</p> <p>Use <code class="function">g_main_context_invoke()</code>.</p> </div> <p>Used from an I/O job to send a callback to be run asynchronously in the thread that the job was started from. The callback will be run when the main loop is available, but at that time the I/O job might have finished. The return value from the callback is ignored.</p> <p>Note that if you are passing the <em class="parameter"><code>user_data</code></em> from <a class="link" href="gio-GIOScheduler.html#g-io-scheduler-push-job" title="g_io_scheduler_push_job ()"><code class="function">g_io_scheduler_push_job()</code></a> on to this function you have to ensure that it is not freed before <em class="parameter"><code>func</code></em> is called, either by passing <code class="literal">NULL</code> as <em class="parameter"><code>notify</code></em> to <a class="link" href="gio-GIOScheduler.html#g-io-scheduler-push-job" title="g_io_scheduler_push_job ()"><code class="function">g_io_scheduler_push_job()</code></a> or by using refcounting for <em class="parameter"><code>user_data</code></em> .</p> <div class="refsect3"> <a name="g-io-scheduler-job-send-to-mainloop-async.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>job</p></td> <td class="parameter_description"><p>a <a class="link" href="gio-GIOScheduler.html#GIOSchedulerJob" title="GIOSchedulerJob"><span class="type">GIOSchedulerJob</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>func</p></td> <td class="parameter_description"><p>a <span class="type">GSourceFunc</span> callback that will be called in the original thread</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>user_data</p></td> <td class="parameter_description"><p>data to pass to <em class="parameter"><code>func</code></em> </p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>notify</p></td> <td class="parameter_description"><p>a <span class="type">GDestroyNotify</span> for <em class="parameter"><code>user_data</code></em> , or <code class="literal">NULL</code>. </p></td> <td class="parameter_annotations"><span class="annotation">[<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></td> </tr> </tbody> </table></div> </div> </div> </div> <div class="refsect1"> <a name="gio-GIOScheduler.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="GIOSchedulerJob"></a><h3>GIOSchedulerJob</h3> <pre class="programlisting">typedef struct _GIOSchedulerJob GIOSchedulerJob;</pre> <p>Opaque class for defining and scheduling IO jobs.</p> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>