glib-io-channels.html

glid编写实例

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<a name="id2911787"></a><h3>
<a name="g-io-channel-error-from-errno"></a>g_io_channel_error_from_errno ()</h3>
<a class="indexterm" name="id2911798"></a><pre class="programlisting"><a href="glib-IO-Channels.html#GIOChannelError">GIOChannelError</a> g_io_channel_error_from_errno
                                            (<a href="glib-Basic-Types.html#gint">gint</a> en);</pre>
<p>
Converts an <code class="literal">errno</code> error number to a <a href="glib-IO-Channels.html#GIOChannelError"><span class="type">GIOChannelError</span></a>.</p>
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<span class="term"><em class="parameter"><code>en</code></em>&#160;:</span></td>
<td> an <code class="literal">errno</code> error number, e.g. <code class="literal">EINVAL</code>.
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a <a href="glib-IO-Channels.html#GIOChannelError"><span class="type">GIOChannelError</span></a> error number, e.g. <code class="literal">G_IO_CHANNEL_ERROR_INVAL</code>.
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<a name="id2911900"></a><h3>
<a name="g-io-channel-ref"></a>g_io_channel_ref ()</h3>
<a class="indexterm" name="id2911910"></a><pre class="programlisting"><a href="glib-IO-Channels.html#GIOChannel">GIOChannel</a>* g_io_channel_ref                (<a href="glib-IO-Channels.html#GIOChannel">GIOChannel</a> *channel);</pre>
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Increments the reference count of a <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a>.
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<span class="term"><em class="parameter"><code>channel</code></em>&#160;:</span></td>
<td>a <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a>.
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the <em class="parameter"><code>channel</code></em> that was passed in (since 2.6)


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<a name="id2911988"></a><h3>
<a name="g-io-channel-unref"></a>g_io_channel_unref ()</h3>
<a class="indexterm" name="id2912000"></a><pre class="programlisting">void        g_io_channel_unref              (<a href="glib-IO-Channels.html#GIOChannel">GIOChannel</a> *channel);</pre>
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Decrements the reference count of a <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a>.
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<span class="term"><em class="parameter"><code>channel</code></em>&#160;:</span></td>
<td>a <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a>.


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<a name="id2912062"></a><h3>
<a name="g-io-create-watch"></a>g_io_create_watch ()</h3>
<a class="indexterm" name="id2912073"></a><pre class="programlisting"><a href="glib-The-Main-Event-Loop.html#GSource">GSource</a>*    g_io_create_watch               (<a href="glib-IO-Channels.html#GIOChannel">GIOChannel</a> *channel,
                                             <a href="glib-IO-Channels.html#GIOCondition">GIOCondition</a> condition);</pre>
<p>
Creates a <a href="glib-The-Main-Event-Loop.html#GSource"><span class="type">GSource</span></a> that's dispatched when <em class="parameter"><code>condition</code></em> is met for the given
<em class="parameter"><code>channel</code></em>. For example, if condition is <span class="type">G_IO_IN</span>, the source will be dispatched
when there's data available for reading.  <a href="glib-IO-Channels.html#g-io-add-watch"><code class="function">g_io_add_watch()</code></a> is a simpler
interface to this same functionality, for the case where you want to add the
source to the default main loop at the default priority.
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<span class="term"><em class="parameter"><code>channel</code></em>&#160;:</span></td>
<td>a <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a> to watch
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<span class="term"><em class="parameter"><code>condition</code></em>&#160;:</span></td>
<td>conditions to watch for
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td>a new <a href="glib-The-Main-Event-Loop.html#GSource"><span class="type">GSource</span></a>


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<a name="id2912212"></a><h3>
<a name="g-io-add-watch"></a>g_io_add_watch ()</h3>
<a class="indexterm" name="id2912222"></a><pre class="programlisting"><a href="glib-Basic-Types.html#guint">guint</a>       g_io_add_watch                  (<a href="glib-IO-Channels.html#GIOChannel">GIOChannel</a> *channel,
                                             <a href="glib-IO-Channels.html#GIOCondition">GIOCondition</a> condition,
                                             <a href="glib-IO-Channels.html#GIOFunc">GIOFunc</a> func,
                                             <a href="glib-Basic-Types.html#gpointer">gpointer</a> user_data);</pre>
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Adds the <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a> into the
<a href="glib-The-Main-Event-Loop.html" title="The Main Event Loop">main event loop</a>
with the default priority.
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<span class="term"><em class="parameter"><code>channel</code></em>&#160;:</span></td>
<td>a <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a>.
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<span class="term"><em class="parameter"><code>condition</code></em>&#160;:</span></td>
<td>the condition to watch for.
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<span class="term"><em class="parameter"><code>func</code></em>&#160;:</span></td>
<td>the function to call when the condition is satisfied.
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<span class="term"><em class="parameter"><code>user_data</code></em>&#160;:</span></td>
<td>user data to pass to <em class="parameter"><code>func</code></em>.
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td>the event source id.


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<a name="id2912375"></a><h3>
<a name="g-io-add-watch-full"></a>g_io_add_watch_full ()</h3>
<a class="indexterm" name="id2912386"></a><pre class="programlisting"><a href="glib-Basic-Types.html#guint">guint</a>       g_io_add_watch_full             (<a href="glib-IO-Channels.html#GIOChannel">GIOChannel</a> *channel,
                                             <a href="glib-Basic-Types.html#gint">gint</a> priority,
                                             <a href="glib-IO-Channels.html#GIOCondition">GIOCondition</a> condition,
                                             <a href="glib-IO-Channels.html#GIOFunc">GIOFunc</a> func,
                                             <a href="glib-Basic-Types.html#gpointer">gpointer</a> user_data,
                                             <a href="glib-Datasets.html#GDestroyNotify">GDestroyNotify</a> notify);</pre>
<p>
Adds the <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a> into the
<a href="glib-The-Main-Event-Loop.html" title="The Main Event Loop">main event loop</a>
with the given priority.
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<span class="term"><em class="parameter"><code>channel</code></em>&#160;:</span></td>
<td>a <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a>.
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<span class="term"><em class="parameter"><code>priority</code></em>&#160;:</span></td>
<td>the priority of the <a href="glib-IO-Channels.html#GIOChannel"><span class="type">GIOChannel</span></a> source.
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<span class="term"><em class="parameter"><code>condition</code></em>&#160;:</span></td>
<td>the condition to watch for.
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<span class="term"><em class="parameter"><code>func</code></em>&#160;:</span></td>
<td>the function to call when the condition is satisfied.
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<span class="term"><em class="parameter"><code>user_data</code></em>&#160;:</span></td>
<td>user data to pass to <em class="parameter"><code>func</code></em>.
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<span class="term"><em class="parameter"><code>notify</code></em>&#160;:</span></td>
<td>the function to call when the source is removed.
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<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td>the event source id.


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<a name="id2912590"></a><h3>
<a name="GIOCondition"></a>enum GIOCondition</h3>
<a class="indexterm" name="id2912601"></a><pre class="programlisting">typedef enum
{
  G_IO_IN	GLIB_SYSDEF_POLLIN,
  G_IO_OUT	GLIB_SYSDEF_POLLOUT,
  G_IO_PRI	GLIB_SYSDEF_POLLPRI,
  G_IO_ERR	GLIB_SYSDEF_POLLERR,
  G_IO_HUP	GLIB_SYSDEF_POLLHUP,
  G_IO_NVAL	GLIB_SYSDEF_POLLNVAL
} GIOCondition;
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A bitwise combination representing a condition to watch for on an event
source.
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<span class="term"><code class="literal">G_IO_IN</code></span></td>
<td>There is data to read.
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<span class="term"><code