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<title>xmlmodule: dynamic module loading</title>
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<h2><span class="refentrytitle">xmlmodule</span></h2>
<p>xmlmodule - dynamic module loading</p>
<p>basic API for dynamic module loading, used by libexslt added in 2.6.17 </p>
<p>Author(s): Joel W. Reed </p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">typedef struct _xmlModule <a href="#xmlModule">xmlModule</a>;
typedef enum <a href="#xmlModuleOption">xmlModuleOption</a>;
typedef <a href="libxml2-xmlmodule.html#xmlModule">xmlModule</a> * <a href="#xmlModulePtr">xmlModulePtr</a>;
int <a href="#xmlModuleClose">xmlModuleClose</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module);
int <a href="#xmlModuleFree">xmlModuleFree</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module);
<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> <a href="#xmlModuleOpen">xmlModuleOpen</a> (const char * name, <br> int options);
int <a href="#xmlModuleSymbol">xmlModuleSymbol</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module, <br> const char * name, <br> void ** symbol);
</pre>
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<div class="refsect1" lang="en"><h2>Description</h2></div>
<div class="refsect1" lang="en">
<h2>Details</h2>
<div class="refsect2" lang="en">
<div class="refsect2" lang="en">
<h3>
<a name="xmlModule">Structure </a>xmlModule</h3>
<pre class="programlisting">struct _xmlModule {
The content of this structure is not made public by the API.
} xmlModule;
</pre>
<p></p>
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<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlModuleOption">Enum </a>xmlModuleOption</h3>
<pre class="programlisting">enum <a href="#xmlModuleOption">xmlModuleOption</a> {
<a name="XML_MODULE_LAZY">XML_MODULE_LAZY</a> = 1 /* lazy binding */
<a name="XML_MODULE_LOCAL">XML_MODULE_LOCAL</a> = 2 /* local binding */
};
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlModulePtr">Typedef </a>xmlModulePtr</h3>
<pre class="programlisting"><a href="libxml2-xmlmodule.html#xmlModule">xmlModule</a> * xmlModulePtr;
</pre>
<p>A handle to a dynamically loaded module</p>
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<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlModuleClose"></a>xmlModuleClose ()</h3>
<pre class="programlisting">int xmlModuleClose (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module)<br>
</pre>
<p>The close operations unload the associated module and free the data associated to the module.</p>
<div class="variablelist"><table border="0">
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<td><span class="term"><i><tt>module</tt></i>:</span></td>
<td>the module handle</td>
</tr>
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<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>0 in case of success, -1 in case of argument error and -2 if the module could not be closed/unloaded.</td>
</tr>
</tbody>
</table></div>
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<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlModuleFree"></a>xmlModuleFree ()</h3>
<pre class="programlisting">int xmlModuleFree (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module)<br>
</pre>
<p>The free operations free the data associated to the module but does not unload the associated shared library which may still be in use.</p>
<div class="variablelist"><table border="0">
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<td><span class="term"><i><tt>module</tt></i>:</span></td>
<td>the module handle</td>
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<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>0 in case of success, -1 in case of argument error</td>
</tr>
</tbody>
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<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlModuleOpen"></a>xmlModuleOpen ()</h3>
<pre class="programlisting"><a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> xmlModuleOpen (const char * name, <br> int options)<br>
</pre>
<p>Opens a module/shared library given its name or path NOTE: that due to portability issues, behaviour can only be guaranteed with @name using ASCII. We cannot guarantee that an UTF-8 string would work, which is why name is a const char * and not a const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * . TODO: options are not yet implemented.</p>
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<td><span class="term"><i><tt>name</tt></i>:</span></td>
<td>the module name</td>
</tr>
<tr>
<td><span class="term"><i><tt>options</tt></i>:</span></td>
<td>a set of <a href="libxml2-xmlmodule.html#xmlModuleOption">xmlModuleOption</a>
</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>a handle for the module or NULL in case of error</td>
</tr>
</tbody>
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<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlModuleSymbol"></a>xmlModuleSymbol ()</h3>
<pre class="programlisting">int xmlModuleSymbol (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module, <br> const char * name, <br> void ** symbol)<br>
</pre>
<p>Lookup for a symbol address in the given module NOTE: that due to portability issues, behaviour can only be guaranteed with @name using ASCII. We cannot guarantee that an UTF-8 string would work, which is why name is a const char * and not a const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * .</p>
<div class="variablelist"><table border="0">
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<td><span class="term"><i><tt>module</tt></i>:</span></td>
<td>the module</td>
</tr>
<tr>
<td><span class="term"><i><tt>name</tt></i>:</span></td>
<td>the name of the symbol</td>
</tr>
<tr>
<td><span class="term"><i><tt>symbol</tt></i>:</span></td>
<td>the resulting symbol address</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>0 if the symbol was found, or -1 in case of error</td>
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