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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
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<title>GUsbContext</title>
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<a href="#GUsbContext.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#GUsbContext.description" class="shortcut">Description</a>
                   | 
                  <a href="#GUsbContext.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#GUsbContext.properties" class="shortcut">Properties</a>
</td></tr>
</table>
<div class="refentry">
<a name="GUsbContext"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GUsbContext.top_of_page"></a>GUsbContext</span></h2>
<p>GUsbContext — Per-thread instance integration for libusb</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GUsbContext.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">struct              <a class="link" href="GUsbContext.html#GUsbContext-struct" title="struct GUsbContext">GUsbContext</a>;
struct              <a class="link" href="GUsbContext.html#GUsbContextClass" title="struct GUsbContextClass">GUsbContextClass</a>;
enum                <a class="link" href="GUsbContext.html#GUsbContextError" title="enum GUsbContextError">GUsbContextError</a>;
#define             <a class="link" href="GUsbContext.html#G-USB-CONTEXT-ERROR:CAPS" title="G_USB_CONTEXT_ERROR">G_USB_CONTEXT_ERROR</a>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>              <a class="link" href="GUsbContext.html#g-usb-context-error-quark" title="g_usb_context_error_quark ()">g_usb_context_error_quark</a>           (<em class="parameter"><code><span class="type">void</span></code></em>);
<a class="link" href="gusb-gusb-source.html#GUsbSource" title="GUsbSource"><span class="returnvalue">GUsbSource</span></a> *        <a class="link" href="GUsbContext.html#g-usb-context-get-source" title="g_usb_context_get_source ()">g_usb_context_get_source</a>            (<em class="parameter"><code><a class="link" href="GUsbContext.html" title="GUsbContext"><span class="type">GUsbContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a> *main_ctx</code></em>);
<a class="link" href="GUsbContext.html" title="GUsbContext"><span class="returnvalue">GUsbContext</span></a> *       <a class="link" href="GUsbContext.html#g-usb-context-new" title="g_usb_context_new ()">g_usb_context_new</a>                   (<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="GUsbContext.html#g-usb-context-set-debug" title="g_usb_context_set_debug ()">g_usb_context_set_debug</a>             (<em class="parameter"><code><a class="link" href="GUsbContext.html" title="GUsbContext"><span class="type">GUsbContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Message-Logging.html#GLogLevelFlags"><span class="type">GLogLevelFlags</span></a> flags</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GUsbContext.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>
   +----GUsbContext
</pre>
</div>
<div class="refsect1">
<a name="GUsbContext.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="GUsbContext.html#GUsbContext--debug-level" title='The "debug-level" property'>debug-level</a>"              <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write
  "<a class="link" href="GUsbContext.html#GUsbContext--libusb-context" title='The "libusb-context" property'>libusb-context</a>"           <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>              : Read / Write / Construct Only
</pre>
</div>
<div class="refsect1">
<a name="GUsbContext.description"></a><h2>Description</h2>
<p>
This object is used to get a context that is thread safe.
</p>
</div>
<div class="refsect1">
<a name="GUsbContext.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GUsbContext-struct"></a><h3>struct GUsbContext</h3>
<pre class="programlisting">struct GUsbContext;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GUsbContextClass"></a><h3>struct GUsbContextClass</h3>
<pre class="programlisting">struct GUsbContextClass {
	GObjectClass			 parent_class;
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GUsbContextError"></a><h3>enum GUsbContextError</h3>
<pre class="programlisting">typedef enum {
	G_USB_CONTEXT_ERROR_INTERNAL
} GUsbContextError;
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="G-USB-CONTEXT-ERROR:CAPS"></a><h3>G_USB_CONTEXT_ERROR</h3>
<pre class="programlisting">#define G_USB_CONTEXT_ERROR		(g_usb_context_error_quark ())
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="g-usb-context-error-quark"></a><h3>g_usb_context_error_quark ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>              g_usb_context_error_quark           (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<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>Our personal error quark.</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="g-usb-context-get-source"></a><h3>g_usb_context_get_source ()</h3>
<pre class="programlisting"><a class="link" href="gusb-gusb-source.html#GUsbSource" title="GUsbSource"><span class="returnvalue">GUsbSource</span></a> *        g_usb_context_get_source            (<em class="parameter"><code><a class="link" href="GUsbContext.html" title="GUsbContext"><span class="type">GUsbContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a> *main_ctx</code></em>);</pre>
<p>
Returns a source for this context. The first call actually creates
the source and the result is returned in all future calls.
</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>context</code></em> :</span></p></td>
<td>a <a class="link" href="GUsbContext.html" title="GUsbContext"><span class="type">GUsbContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>main_ctx</code></em> :</span></p></td>
<td>a <a href="http://library.gnome.org/devel/glib/unstable/glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a>, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <a class="link" href="gusb-gusb-source.html#GUsbSource" title="GUsbSource"><span class="type">GUsbSource</span></a>. <span class="annotation">[<a href="http://foldoc.org/transfer%20none"><span class="acronym">transfer none</span></a>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="g-usb-context-new"></a><h3>g_usb_context_new ()</h3>
<pre class="programlisting"><a class="link" href="GUsbContext.html" title="GUsbContext"><span class="returnvalue">GUsbContext</span></a> *       g_usb_context_new                   (<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>
Creates a new context for accessing USB devices.
</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>error</code></em> :</span></p></td>
<td>a <a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="GUsbContext.html" title="GUsbContext"><code class="literal">GUsbContext</code></a> object or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> on error.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="g-usb-context-set-debug"></a><h3>g_usb_context_set_debug ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                g_usb_context_set_debug             (<em class="parameter"><code><a class="link" href="GUsbContext.html" title="GUsbContext"><span class="type">GUsbContext</span></a> *context</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Message-Logging.html#GLogLevelFlags"><span class="type">GLogLevelFlags</span></a> flags</code></em>);</pre>
<p>
Sets the debug flags which control what is logged to the console.
</p>
<p>
Using <a href="http://library.gnome.org/devel/glib/unstable/glib-Message-Logging.html#G-LOG-LEVEL-INFO:CAPS"><code class="literal">G_LOG_LEVEL_INFO</code></a> will output to standard out, and everything
else logs to standard error.
</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>context</code></em> :</span></p></td>
<td>a <a class="link" href="GUsbContext.html" title="GUsbContext"><span class="type">GUsbContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>
<td>a GLogLevelFlags such as <a href="http://library.gnome.org/devel/glib/unstable/glib-Message-Logging.html#G-LOG-LEVEL-ERROR:CAPS"><code class="literal">G_LOG_LEVEL_ERROR</code></a> | <a href="http://library.gnome.org/devel/glib/unstable/glib-Message-Logging.html#G-LOG-LEVEL-INFO:CAPS"><code class="literal">G_LOG_LEVEL_INFO</code></a>, or 0</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.1.0</p>
</div>
</div>
<div class="refsect1">
<a name="GUsbContext.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GUsbContext--debug-level"></a><h3>The <code class="literal">"debug-level"</code> property</h3>
<pre class="programlisting">  "debug-level"              <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write</pre>
<p></p>
<p>Allowed values: [0,3]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GUsbContext--libusb-context"></a><h3>The <code class="literal">"libusb-context"</code> property</h3>
<pre class="programlisting">  "libusb-context"           <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>              : Read / Write / Construct Only</pre>
<p></p>
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