glib-the-main-event-loop.html

glid编写实例

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<p>
Checks if any events are pending for the default <a href="glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a>
(i.e. ready to be processed).  
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td>
<code class="literal">TRUE</code> if any events are pending.
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<div class="refsect2" lang="en">
<a name="id2850745"></a><h3>
<a name="g-main-context-find-source-by-id"></a>g_main_context_find_source_by_id ()</h3>
<a class="indexterm" name="id2850757"></a><pre class="programlisting"><a href="glib-The-Main-Event-Loop.html#GSource">GSource</a>*    g_main_context_find_source_by_id
                                            (<a href="glib-The-Main-Event-Loop.html#GMainContext">GMainContext</a> *context,
                                             <a href="glib-Basic-Types.html#guint">guint</a> source_id);</pre>
<p>
Finds a <a href="glib-The-Main-Event-Loop.html#GSource"><span class="type">GSource</span></a> given a pair of context and ID</p>
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<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a> (if <code class="literal">NULL</code>, the default context will be used)
</td>
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<td>
<span class="term"><em class="parameter"><code>source_id</code></em>&#160;:</span></td>
<td> the source ID, as returned by <a href="glib-The-Main-Event-Loop.html#g-source-get-id"><code class="function">g_source_get_id()</code></a>
</td>
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the <a href="glib-The-Main-Event-Loop.html#GSource"><span class="type">GSource</span></a> if found, otherwise, <code class="literal">NULL</code>
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<div class="refsect2" lang="en">
<a name="id2850888"></a><h3>
<a name="g-main-context-find-source-by-user-data"></a>g_main_context_find_source_by_user_data ()</h3>
<a class="indexterm" name="id2850900"></a><pre class="programlisting"><a href="glib-The-Main-Event-Loop.html#GSource">GSource</a>*    g_main_context_find_source_by_user_data
                                            (<a href="glib-The-Main-Event-Loop.html#GMainContext">GMainContext</a> *context,
                                             <a href="glib-Basic-Types.html#gpointer">gpointer</a> user_data);</pre>
<p>
Finds a source with the given user data for the callback.  If
multiple sources exist with the same user data, the first
one found will be returned.</p>
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<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a>
</td>
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<td>
<span class="term"><em class="parameter"><code>user_data</code></em>&#160;:</span></td>
<td> the user_data for the callback.
</td>
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the source, if one was found, otherwise <code class="literal">NULL</code>
</td>
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<div class="refsect2" lang="en">
<a name="id2851000"></a><h3>
<a name="g-main-context-find-source-by-funcs-user-data"></a>g_main_context_find_source_by_funcs_user_data ()</h3>
<a class="indexterm" name="id2851011"></a><pre class="programlisting"><a href="glib-The-Main-Event-Loop.html#GSource">GSource</a>*    g_main_context_find_source_by_funcs_user_data
                                            (<a href="glib-The-Main-Event-Loop.html#GMainContext">GMainContext</a> *context,
                                             <a href="glib-The-Main-Event-Loop.html#GSourceFuncs">GSourceFuncs</a> *funcs,
                                             <a href="glib-Basic-Types.html#gpointer">gpointer</a> user_data);</pre>
<p>
Finds a source with the given source functions and user data.  If
multiple sources exist with the same source function and user data,
the first one found will be returned.</p>
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<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a> (if <code class="literal">NULL</code>, the default context will be used).
</td>
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<span class="term"><em class="parameter"><code>funcs</code></em>&#160;:</span></td>
<td> the <em class="parameter"><code>source_funcs</code></em> passed to <a href="glib-The-Main-Event-Loop.html#g-source-new"><code class="function">g_source_new()</code></a>.
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<span class="term"><em class="parameter"><code>user_data</code></em>&#160;:</span></td>
<td> the user data from the callback.
</td>
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the source, if one was found, otherwise <code class="literal">NULL</code>
</td>
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<div class="refsect2" lang="en">
<a name="id2851157"></a><h3>
<a name="g-main-context-wakeup"></a>g_main_context_wakeup ()</h3>
<a class="indexterm" name="id2851168"></a><pre class="programlisting">void        g_main_context_wakeup           (<a href="glib-The-Main-Event-Loop.html#GMainContext">GMainContext</a> *context);</pre>
<p>
If <em class="parameter"><code>context</code></em> is currently waiting in a <code class="function">poll()</code>, interrupt
the <code class="function">poll()</code>, and continue the iteration process.</p>
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<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a>
</td>
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<div class="refsect2" lang="en">
<a name="id2851255"></a><h3>
<a name="g-main-context-acquire"></a>g_main_context_acquire ()</h3>
<a class="indexterm" name="id2851266"></a><pre class="programlisting"><a href="glib-Basic-Types.html#gboolean">gboolean</a>    g_main_context_acquire          (<a href="glib-The-Main-Event-Loop.html#GMainContext">GMainContext</a> *context);</pre>
<p>
Tries to become the owner of the specified context.
If some other context is the owner of the context,
returns <code class="literal">FALSE</code> immediately. Ownership is properly
recursive: the owner can require ownership again
and will release ownership when <a href="glib-The-Main-Event-Loop.html#g-main-context-release"><code class="function">g_main_context_release()</code></a>
is called as many times as <a href="glib-The-Main-Event-Loop.html#g-main-context-acquire"><code class="function">g_main_context_acquire()</code></a>.
</p>
<p>
You must be the owner of a context before you
can call <a href="glib-The-Main-Event-Loop.html#g-main-context-prepare"><code class="function">g_main_context_prepare()</code></a>, <a href="glib-The-Main-Event-Loop.html#g-main-context-query"><code class="function">g_main_context_query()</code></a>,
<a href="glib-The-Main-Event-Loop.html#g-main-context-check"><code class="function">g_main_context_check()</code></a>, <a href="glib-The-Main-Event-Loop.html#g-main-context-dispatch"><code class="function">g_main_context_dispatch()</code></a>.</p>
<p>

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<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a>
</td>
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> <code class="literal">TRUE</code> if the operation succeeded, and
  this thread is now the owner of <em class="parameter"><code>context</code></em>.
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<div class="refsect2" lang="en">
<a name="id2851426"></a><h3>
<a name="g-main-context-release"></a>g_main_context_release ()</h3>
<a class="indexterm" name="id2851437"></a><pre class="programlisting">void        g_main_context_release          (<a href="glib-The-Main-Event-Loop.html#GMainContext">GMainContext</a> *context);</pre>
<p>
Releases ownership of a context previously acquired by this thread
with <a href="glib-The-Main-Event-Loop.html#g-main-context-acquire"><code class="function">g_main_context_acquire()</code></a>. If the context was acquired multiple
times, the only release ownership when <a href="glib-The-Main-Event-Loop.html#g-main-context-release"><code class="function">g_main_context_release()</code></a>
is called as many times as it was acquired.</p>
<p>

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<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a>
</td>
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<div class="refsect2" lang="en">
<a name="id2851520"></a><h3>
<a name="g-main-context-wait"></a>g_main_context_wait ()</h3>
<a class="indexterm" name="id2851531"></a><pre class="programlisting"><a href="glib-Basic-Types.html#gboolean">gboole