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168 lines
6.8 KiB
HTML
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>xmlmodule: dynamic module loading</title>
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<th width="100%" align="center">libxml2 Reference Manual</th>
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<h2><span class="refentrytitle">xmlmodule</span></h2>
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<p>xmlmodule - dynamic module loading</p>
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<p>basic API for dynamic module loading, used by libexslt added in 2.6.17 </p>
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<p>Author(s): Joel W. Reed </p>
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<div class="refsynopsisdiv">
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<h2>Synopsis</h2>
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<pre class="synopsis">typedef struct _xmlModule <a href="#xmlModule">xmlModule</a>;
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typedef enum <a href="#xmlModuleOption">xmlModuleOption</a>;
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typedef <a href="libxml2-xmlmodule.html#xmlModule">xmlModule</a> * <a href="#xmlModulePtr">xmlModulePtr</a>;
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int <a href="#xmlModuleClose">xmlModuleClose</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module);
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int <a href="#xmlModuleFree">xmlModuleFree</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module);
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<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> <a href="#xmlModuleOpen">xmlModuleOpen</a> (const char * name, <br> int options);
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int <a href="#xmlModuleSymbol">xmlModuleSymbol</a> (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module, <br> const char * name, <br> void ** symbol);
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</pre>
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</div>
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<div class="refsect1" lang="en"><h2>Description</h2></div>
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<div class="refsect1" lang="en">
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<h2>Details</h2>
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<div class="refsect2" lang="en">
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<div class="refsect2" lang="en">
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<h3>
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<a name="xmlModule">Structure </a>xmlModule</h3>
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<pre class="programlisting">struct _xmlModule {
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The content of this structure is not made public by the API.
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} xmlModule;
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</pre>
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<p></p>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<h3>
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<a name="xmlModuleOption">Enum </a>xmlModuleOption</h3>
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<pre class="programlisting">enum <a href="#xmlModuleOption">xmlModuleOption</a> {
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<a name="XML_MODULE_LAZY">XML_MODULE_LAZY</a> = 1 /* lazy binding */
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<a name="XML_MODULE_LOCAL">XML_MODULE_LOCAL</a> = 2 /* local binding */
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};
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</pre>
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<p></p>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<h3>
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<a name="xmlModulePtr">Typedef </a>xmlModulePtr</h3>
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<pre class="programlisting"><a href="libxml2-xmlmodule.html#xmlModule">xmlModule</a> * xmlModulePtr;
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</pre>
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<p>A handle to a dynamically loaded module</p>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<h3>
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<a name="xmlModuleClose"></a>xmlModuleClose ()</h3>
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<pre class="programlisting">int xmlModuleClose (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module)<br>
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</pre>
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<p>The close operations unload the associated module and free the data associated to the module.</p>
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<div class="variablelist"><table border="0">
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<col align="left">
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<tbody>
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<tr>
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<td><span class="term"><i><tt>module</tt></i>:</span></td>
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<td>the module handle</td>
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</tr>
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<tr>
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<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
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<td>0 in case of success, -1 in case of argument error and -2 if the module could not be closed/unloaded.</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<h3>
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<a name="xmlModuleFree"></a>xmlModuleFree ()</h3>
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<pre class="programlisting">int xmlModuleFree (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module)<br>
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</pre>
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<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>
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<div class="variablelist"><table border="0">
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<col align="left">
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<tbody>
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<tr>
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<td><span class="term"><i><tt>module</tt></i>:</span></td>
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<td>the module handle</td>
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</tr>
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<tr>
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<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
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<td>0 in case of success, -1 in case of argument error</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<h3>
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<a name="xmlModuleOpen"></a>xmlModuleOpen ()</h3>
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<pre class="programlisting"><a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> xmlModuleOpen (const char * name, <br> int options)<br>
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</pre>
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<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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<div class="variablelist"><table border="0">
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<col align="left">
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<tbody>
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<tr>
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<td><span class="term"><i><tt>name</tt></i>:</span></td>
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<td>the module name</td>
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</tr>
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<tr>
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<td><span class="term"><i><tt>options</tt></i>:</span></td>
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<td>a set of <a href="libxml2-xmlmodule.html#xmlModuleOption">xmlModuleOption</a>
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</td>
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</tr>
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<tr>
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<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
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<td>a handle for the module or NULL in case of error</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<h3>
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<a name="xmlModuleSymbol"></a>xmlModuleSymbol ()</h3>
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<pre class="programlisting">int xmlModuleSymbol (<a href="libxml2-xmlmodule.html#xmlModulePtr">xmlModulePtr</a> module, <br> const char * name, <br> void ** symbol)<br>
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</pre>
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<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>
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<div class="variablelist"><table border="0">
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<col align="left">
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<tbody>
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<tr>
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<td><span class="term"><i><tt>module</tt></i>:</span></td>
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<td>the module</td>
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</tr>
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<tr>
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<td><span class="term"><i><tt>name</tt></i>:</span></td>
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<td>the name of the symbol</td>
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</tr>
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<tr>
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<td><span class="term"><i><tt>symbol</tt></i>:</span></td>
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<td>the resulting symbol address</td>
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</tr>
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<tr>
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<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
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<td>0 if the symbol was found, or -1 in case of error</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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