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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>gnome-vfs-module-callback: GnomeVFS - Filesystem Abstraction library</title>
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                  <a href="#gnome-vfs-2.0-gnome-vfs-module-callback.description" class="shortcut">Description</a></span>
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<div class="refentry">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gnome-vfs-2.0-gnome-vfs-module-callback.top_of_page"></a>gnome-vfs-module-callback</span></h2>
<p>gnome-vfs-module-callback — functions used by apps if they want to answer to callback invocations by gnome-vfs modules</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()">*GnomeVFSModuleCallback</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">
<span class="c_punctuation">(</span><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallbackResponse" title="GnomeVFSModuleCallbackResponse ()">*GnomeVFSModuleCallbackResponse</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">
<span class="c_punctuation">(</span><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()">*GnomeVFSAsyncModuleCallback</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="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-set-default" title="gnome_vfs_module_callback_set_default ()">gnome_vfs_module_callback_set_default</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="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-push" title="gnome_vfs_module_callback_push ()">gnome_vfs_module_callback_push</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="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-pop" title="gnome_vfs_module_callback_pop ()">gnome_vfs_module_callback_pop</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="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-set-default" title="gnome_vfs_async_module_callback_set_default ()">gnome_vfs_async_module_callback_set_default</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="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-push" title="gnome_vfs_async_module_callback_push ()">gnome_vfs_async_module_callback_push</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="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-pop" title="gnome_vfs_async_module_callback_pop ()">gnome_vfs_async_module_callback_pop</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GnomeVFSModuleCallback"></a><h3>GnomeVFSModuleCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GnomeVFSModuleCallback<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> in</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> in_size</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> out</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> out_size</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> callback_data</code></em>);</pre>
<p>Modules use a <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> to send data to
client applications and request data from them synchronously.</p>
<p>The format of <em class="parameter"><code>in</code></em>
 and <em class="parameter"><code>out</code></em>
 is determined by the callback name.</p>
<div class="refsect3">
<a name="GnomeVFSModuleCallback.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>in</p></td>
<td class="parameter_description"><p>data passed from module to application.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_size</p></td>
<td class="parameter_description"><p>size of <em class="parameter"><code>in</code></em>
bytes.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>data passed from application to module.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out_size</p></td>
<td class="parameter_description"><p>size of <em class="parameter"><code>out</code></em>
in bytes.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback_data</p></td>
<td class="parameter_description"><p>user data passed when connecting the callback.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GnomeVFSModuleCallbackResponse"></a><h3>GnomeVFSModuleCallbackResponse ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GnomeVFSModuleCallbackResponse<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> response_data</code></em>);</pre>
<p>This is the type of the response function passed to a
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><code class="function">GnomeVFSAsyncModuleCallback()</code></a>. It should be called when the async
callback has completed.</p>
<div class="refsect3">
<a name="GnomeVFSModuleCallbackResponse.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>response_data</p></td>
<td class="parameter_description"><p>pass the response data argument originally passed to the async callback.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GnomeVFSAsyncModuleCallback"></a><h3>GnomeVFSAsyncModuleCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GnomeVFSAsyncModuleCallback<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> in</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> in_size</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> out</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> out_size</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> callback_data</code></em>,
                                <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallbackResponse" title="GnomeVFSModuleCallbackResponse ()"><span class="type">GnomeVFSModuleCallbackResponse</span></a> response</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> response_data</code></em>);</pre>
<p>Modules use a <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> to send data to
client applications and request data from them asynchronously.</p>
<p>The application is expected to invoke the <em class="parameter"><code>response</code></em>
 with <em class="parameter"><code>response_data</code></em>

when it is able to satisfy the request.</p>
<p>The format of <em class="parameter"><code>in</code></em>
 and <em class="parameter"><code>out</code></em>
 is determined by the callback name.</p>
<div class="refsect3">
<a name="GnomeVFSAsyncModuleCallback.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>in</p></td>
<td class="parameter_description"><p>data passed from module to application.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_size</p></td>
<td class="parameter_description"><p>size of <em class="parameter"><code>in</code></em>
bytes.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>data passed from application to module.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out_size</p></td>
<td class="parameter_description"><p>size of <em class="parameter"><code>out</code></em>
in bytes.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback_data</p></td>
<td class="parameter_description"><p>user data passed when connecting the callback.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>response</p></td>
<td class="parameter_description"><p><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallbackResponse" title="GnomeVFSModuleCallbackResponse ()"><span class="type">GnomeVFSModuleCallbackResponse</span></a> that must be invoked when the request is satisfied.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>response_data</p></td>
<td class="parameter_description"><p>data that must be passed to <em class="parameter"><code>response</code></em>
when the request is satisfied.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-module-callback-set-default"></a><h3>gnome_vfs_module_callback_set_default ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_module_callback_set_default (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                       <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> callback</code></em>,
                                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> callback_data</code></em>,
                                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_notify</code></em>);</pre>
<p>Set the default callback for <em class="parameter"><code>callback_name</code></em>
 to
<em class="parameter"><code>callback</code></em>
. <em class="parameter"><code>callback</code></em>
 will be called with <em class="parameter"><code>callback_data</code></em>
 on the
same thread as the gnome-vfs operation that invokes it. The default
value is shared for all threads, but setting it is thread-safe.</p>
<p>Use this function if you want to set a handler to be used by your
whole application. You can use <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-push" title="gnome_vfs_module_callback_push ()"><code class="function">gnome_vfs_module_callback_push()</code></a> to
set a callback function that will temporarily override the default
on the current thread instead. Or you can also use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-set-default" title="gnome_vfs_async_module_callback_set_default ()"><code class="function">gnome_vfs_async_module_callback_set_default()</code></a> to set an async
callback function.</p>
<p>Note: <em class="parameter"><code>destroy_notify</code></em>
 may be called on any thread - it is not
guaranteed to be called on the main thread.</p>
<div class="refsect3">
<a name="gnome-vfs-module-callback-set-default.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>callback_name</p></td>
<td class="parameter_description"><p>name of the module callback to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>function to call when the <em class="parameter"><code>callback</code></em>
is invoked.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback_data</p></td>
<td class="parameter_description"><p>data to pass to <em class="parameter"><code>callback</code></em>
.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>destroy_notify</p></td>
<td class="parameter_description"><p>function to call when <em class="parameter"><code>callback_data</code></em>
is to be freed.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-module-callback-push"></a><h3>gnome_vfs_module_callback_push ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_module_callback_push (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> callback</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> callback_data</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_notify</code></em>);</pre>
<p>Set <em class="parameter"><code>callback</code></em>
 as a temprary handler for <em class="parameter"><code>callback_name</code></em>
. <em class="parameter"><code>callback</code></em>

will be called with <em class="parameter"><code>callback_data</code></em>
 on the same thread as the
gnome-vfs operation that invokes it. The temporary handler is set
per-thread.</p>
<p>gnome_vfs_module_callback_pop() removes the most recently set
temporary handler. The temporary handlers are treated as a first-in
first-out stack.</p>
<p>Use this function to set a temporary callback handler for a single
call or a few calls. You can use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-set-default" title="gnome_vfs_module_callback_set_default ()"><code class="function">gnome_vfs_module_callback_set_default()</code></a> to set a callback function
that will establish a permanent global setting for all threads
instead.</p>
<p>Note: <em class="parameter"><code>destroy_notify</code></em>
 may be called on any thread - it is not
guaranteed to be called on the main thread.</p>
<div class="refsect3">
<a name="gnome-vfs-module-callback-push.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>callback_name</p></td>
<td class="parameter_description"><p>name of the module callback to set temporarily.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>function to call when the <em class="parameter"><code>callback</code></em>
is invoked.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback_data</p></td>
<td class="parameter_description"><p>data to pass to <em class="parameter"><code>callback</code></em>
.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>destroy_notify</p></td>
<td class="parameter_description"><p>function to call when <em class="parameter"><code>callback_data</code></em>
is to be freed.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-module-callback-pop"></a><h3>gnome_vfs_module_callback_pop ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_module_callback_pop (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-async-module-callback-set-default"></a><h3>gnome_vfs_async_module_callback_set_default ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_async_module_callback_set_default
                               (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><span class="type">GnomeVFSAsyncModuleCallback</span></a> callback</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> callback_data</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_notify</code></em>);</pre>
<p>Set the default async callback for <em class="parameter"><code>callback_name</code></em>
 to
<em class="parameter"><code>callback</code></em>
. <em class="parameter"><code>callback</code></em>
 will be called with <em class="parameter"><code>callback_data</code></em>

from a callback on the main thread. It will be passed a response
function which should be called to signal completion of the callback.
The callback function itself may return in the meantime.</p>
<p>The default value is shared for all threads, but setting it is
thread-safe.</p>
<p>Use this function if you want to globally set a callback handler
for use with async operations.</p>
<p>You can use <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-push" title="gnome_vfs_async_module_callback_push ()"><code class="function">gnome_vfs_async_module_callback_push()</code></a> to set an async
callback function that will temporarily override the default on the
current thread instead. Or you can also use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-set-default" title="gnome_vfs_module_callback_set_default ()"><code class="function">gnome_vfs_module_callback_set_default()</code></a> to set a regular callback
function.</p>
<p>Note: <em class="parameter"><code>destroy_notify</code></em>
 may be called on any thread - it is not
guaranteed to be called on the main thread.</p>
<div class="refsect3">
<a name="gnome-vfs-async-module-callback-set-default.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>callback_name</p></td>
<td class="parameter_description"><p>name of the async module callback to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>function to call when <em class="parameter"><code>callback</code></em>
is invoked.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback_data</p></td>
<td class="parameter_description"><p>data to pass to <em class="parameter"><code>callback</code></em>
.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>destroy_notify</p></td>
<td class="parameter_description"><p>function to call when <em class="parameter"><code>callback_data</code></em>
is to be freed.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-async-module-callback-push"></a><h3>gnome_vfs_async_module_callback_push ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_async_module_callback_push (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                      <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><span class="type">GnomeVFSAsyncModuleCallback</span></a> callback</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> callback_data</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_notify</code></em>);</pre>
<p>Set <em class="parameter"><code>callback</code></em>
 as a temprary async handler for
<em class="parameter"><code>callback_name</code></em>
. <em class="parameter"><code>callback</code></em>
 will be called with <em class="parameter"><code>callback_data</code></em>

from a callback on the main thread. It will be passed a response
function which should be called to signal completion of the
callback. The callback function itself may return in the meantime.</p>
<p>The temporary async handler is set per-thread.</p>
<p>gnome_vfs_async_module_callback_pop() removes the most recently set
temporary handler. The temporary async handlers are
treated as a first-in first-out stack.</p>
<p>Use this function to set a temporary async callback handler for a
single call or a few calls. You can use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-set-default" title="gnome_vfs_async_module_callback_set_default ()"><code class="function">gnome_vfs_async_module_callback_set_default()</code></a> to set an async
callback function that will establish a permanent global setting
for all threads instead.</p>
<p>Note: <em class="parameter"><code>destroy_notify</code></em>
 may be called on any thread - it is not
guaranteed to be called on the main thread.</p>
<div class="refsect3">
<a name="gnome-vfs-async-module-callback-push.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>callback_name</p></td>
<td class="parameter_description"><p>name of the module callback to set temporarily.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>function to call when <em class="parameter"><code>callback</code></em>
is invoked.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback_data</p></td>
<td class="parameter_description"><p>data to pass to <em class="parameter"><code>callback</code></em>
.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>destroy_notify</p></td>
<td class="parameter_description"><p>function to call when <em class="parameter"><code>callback_data</code></em>
is to be freed.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-async-module-callback-pop"></a><h3>gnome_vfs_async_module_callback_pop ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_async_module_callback_pop (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>);</pre>
<p>Remove the temporary async handler for <em class="parameter"><code>callback_name</code></em>
 most recently
set with <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-push" title="gnome_vfs_async_module_callback_push ()"><code class="function">gnome_vfs_async_module_callback_push()</code></a>.  If another
temporary async handler was previously set on the same thread, it
becomes the current handler. Otherwise, the default async handler,
if any, becomes current.</p>
<p>The temporary async handlers are treated as a first-in first-out
stack.</p>
<div class="refsect3">
<a name="gnome-vfs-async-module-callback-pop.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>callback_name</p></td>
<td class="parameter_description"><p>name of the module callback to remove a temporary handler for.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback.other_details"></a><h2>Types and Values</h2>
</div>
</div>
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