<?xml version="1.0" encoding="UTF-8"?> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <title>threads: interfaces for thread handling</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-schematron.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-tree.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">threads</span> </h2> <p>threads - interfaces for thread handling</p> <p>set of generic threading related routines should work with pthreads, Windows native or TLS threads </p> <p>Author(s): Daniel Veillard </p> <div class="refsynopsisdiv"> <h2>Synopsis</h2> <pre class="synopsis">typedef struct _xmlMutex <a href="#xmlMutex">xmlMutex</a>; typedef struct _xmlRMutex <a href="#xmlRMutex">xmlRMutex</a>; typedef <a href="libxml2-threads.html#xmlRMutex">xmlRMutex</a> * <a href="#xmlRMutexPtr">xmlRMutexPtr</a>; typedef <a href="libxml2-threads.html#xmlMutex">xmlMutex</a> * <a href="#xmlMutexPtr">xmlMutexPtr</a>; void <a href="#xmlFreeRMutex">xmlFreeRMutex</a> (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok); int <a href="#xmlGetThreadId">xmlGetThreadId</a> (void); void <a href="#xmlMutexUnlock">xmlMutexUnlock</a> (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok); void <a href="#xmlCleanupThreads">xmlCleanupThreads</a> (void); void <a href="#xmlLockLibrary">xmlLockLibrary</a> (void); <a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> <a href="#xmlNewRMutex">xmlNewRMutex</a> (void); void <a href="#xmlMutexLock">xmlMutexLock</a> (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok); int <a href="#xmlIsMainThread">xmlIsMainThread</a> (void); void <a href="#xmlRMutexUnlock">xmlRMutexUnlock</a> (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok); <a href="libxml2-globals.html#xmlGlobalStatePtr">xmlGlobalStatePtr</a> <a href="#xmlGetGlobalState">xmlGetGlobalState</a> (void); <a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> <a href="#xmlNewMutex">xmlNewMutex</a> (void); void <a href="#xmlRMutexLock">xmlRMutexLock</a> (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok); void <a href="#xmlInitThreads">xmlInitThreads</a> (void); void <a href="#xmlUnlockLibrary">xmlUnlockLibrary</a> (void); void <a href="#xmlFreeMutex">xmlFreeMutex</a> (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok); </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="xmlMutex">Structure </a>xmlMutex</h3><pre class="programlisting">struct _xmlMutex { The content of this structure is not made public by the API. } xmlMutex; </pre><p/> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlMutexPtr">Typedef </a>xmlMutexPtr</h3><pre class="programlisting"><a href="libxml2-threads.html#xmlMutex">xmlMutex</a> * xmlMutexPtr; </pre><p/> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlRMutex">Structure </a>xmlRMutex</h3><pre class="programlisting">struct _xmlRMutex { The content of this structure is not made public by the API. } xmlRMutex; </pre><p/> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlRMutexPtr">Typedef </a>xmlRMutexPtr</h3><pre class="programlisting"><a href="libxml2-threads.html#xmlRMutex">xmlRMutex</a> * xmlRMutexPtr; </pre><p/> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlCleanupThreads"/>xmlCleanupThreads ()</h3><pre class="programlisting">void xmlCleanupThreads (void)<br/> </pre><p>xmlCleanupThreads() is used to to cleanup all the thread related data of the libxml2 library once processing has ended.</p> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlFreeMutex"/>xmlFreeMutex ()</h3><pre class="programlisting">void xmlFreeMutex (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok)<br/> </pre><p>xmlFreeMutex() is used to reclaim resources associated with a libxml2 token struct.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>tok</tt></i>:</span></td><td>the simple mutex</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlFreeRMutex"/>xmlFreeRMutex ()</h3><pre class="programlisting">void xmlFreeRMutex (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok)<br/> </pre><p>xmlRFreeMutex() is used to reclaim resources associated with a reentrant mutex.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>tok</tt></i>:</span></td><td>the reentrant mutex</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlGetGlobalState"/>xmlGetGlobalState ()</h3><pre class="programlisting"><a href="libxml2-globals.html#xmlGlobalStatePtr">xmlGlobalStatePtr</a> xmlGetGlobalState (void)<br/> </pre><p>xmlGetGlobalState() is called to retrieve the global state for a thread.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the thread global state or NULL in case of error</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlGetThreadId"/>xmlGetThreadId ()</h3><pre class="programlisting">int xmlGetThreadId (void)<br/> </pre><p>xmlGetThreadId() find the current thread ID number</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the current thread ID number</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlInitThreads"/>xmlInitThreads ()</h3><pre class="programlisting">void xmlInitThreads (void)<br/> </pre><p>xmlInitThreads() is used to to initialize all the thread related data of the libxml2 library.</p> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlIsMainThread"/>xmlIsMainThread ()</h3><pre class="programlisting">int xmlIsMainThread (void)<br/> </pre><p>xmlIsMainThread() check whether the current thread is the main thread.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the current thread is the main thread, 0 otherwise</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlLockLibrary"/>xmlLockLibrary ()</h3><pre class="programlisting">void xmlLockLibrary (void)<br/> </pre><p>xmlLockLibrary() is used to take out a re-entrant lock on the libxml2 library.</p> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlMutexLock"/>xmlMutexLock ()</h3><pre class="programlisting">void xmlMutexLock (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok)<br/> </pre><p>xmlMutexLock() is used to lock a libxml2 token.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>tok</tt></i>:</span></td><td>the simple mutex</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlMutexUnlock"/>xmlMutexUnlock ()</h3><pre class="programlisting">void xmlMutexUnlock (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok)<br/> </pre><p>xmlMutexUnlock() is used to unlock a libxml2 token.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>tok</tt></i>:</span></td><td>the simple mutex</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNewMutex"/>xmlNewMutex ()</h3><pre class="programlisting"><a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> xmlNewMutex (void)<br/> </pre><p>xmlNewMutex() is used to allocate a libxml2 token struct for use in synchronizing access to data.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new simple mutex pointer or NULL in case of error</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNewRMutex"/>xmlNewRMutex ()</h3><pre class="programlisting"><a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> xmlNewRMutex (void)<br/> </pre><p>xmlRNewMutex() is used to allocate a reentrant mutex for use in synchronizing access to data. token_r is a re-entrant lock and thus useful for synchronizing access to data structures that may be manipulated in a recursive fashion.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new reentrant mutex pointer or NULL in case of error</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlRMutexLock"/>xmlRMutexLock ()</h3><pre class="programlisting">void xmlRMutexLock (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok)<br/> </pre><p>xmlRMutexLock() is used to lock a libxml2 token_r.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>tok</tt></i>:</span></td><td>the reentrant mutex</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlRMutexUnlock"/>xmlRMutexUnlock ()</h3><pre class="programlisting">void xmlRMutexUnlock (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok)<br/> </pre><p>xmlRMutexUnlock() is used to unlock a libxml2 token_r.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>tok</tt></i>:</span></td><td>the reentrant mutex</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlUnlockLibrary"/>xmlUnlockLibrary ()</h3><pre class="programlisting">void xmlUnlockLibrary (void)<br/> </pre><p>xmlUnlockLibrary() is used to release a re-entrant lock on the libxml2 library.</p> </div> <hr/> </div> </div> </body> </html>