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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>xmlmodule: dynamic module loading</title> <meta name="generator" content="Libxml2 devhelp stylesheet"> <link rel="start" href="index.html" title="libxml2 Reference Manual"> <link rel="up" href="general.html" title="API"> <link rel="stylesheet" href="style.css" type="text/css"> <link rel="chapter" href="general.html" title="API"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"> <td><a accesskey="p" href="libxml2-xmlmemory.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td> <td><a accesskey="u" href="general.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td> <td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td> <td><a accesskey="n" href="libxml2-xmlreader.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td> <th width="100%" align="center">libxml2 Reference Manual</th> </tr></table> <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> </div> <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> </div> <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> </div> <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"> <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> <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"> <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> <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> <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> <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"> <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> <hr> </div> </div> </body> </html>