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<title>xmlmodule: dynamic module loading</title>
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<span class="refentrytitle">xmlmodule</span>
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<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 <a href="libxml2-xmlmodule.html#xmlModule">xmlModule</a> * <a href="#xmlModulePtr">xmlModulePtr</a>;
typedef enum <a href="#xmlModuleOption">xmlModuleOption</a>;
int <a href="#xmlModuleFree">xmlModuleFree</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module);
int <a href="#xmlModuleSymbol">xmlModuleSymbol</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module, <br/> const char * name, <br/> void ** symbol);
<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> <a href="#xmlModuleOpen">xmlModuleOpen</a> (const char * name, <br/> int options);
int <a href="#xmlModuleClose">xmlModuleClose</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module);
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<div class="refsect1" lang="en">
<h2>Description</h2>
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<div class="refsect1" lang="en">
<h2>Details</h2>
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<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/>
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<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/>
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<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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<div class="refsect2" lang="en"><h3><a name="xmlModuleClose"/>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"><col align="left"/><tbody><tr><td><span class="term"><i><tt>module</tt></i>:</span></td><td>the module handle</td></tr><tr><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></div>
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<div class="refsect2" lang="en"><h3><a name="xmlModuleFree"/>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"><col align="left"/><tbody><tr><td><span class="term"><i><tt>module</tt></i>:</span></td><td>the module handle</td></tr><tr><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></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="xmlModuleOpen"/>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 TODO: options are not yet implemented.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><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></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="xmlModuleSymbol"/>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</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><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></tr></tbody></table></div></div>
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