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v2.14.2
doc/devhelp/libxml2-threads.html
254 строки
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Nick Wellnhofer
Update documentation for 2.14.0
27 мар 2025, 17:17
27 мар 2025, 17:17
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<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 <a href="libxml2-threads.html#xmlMutex">xmlMutex</a> * <a href="#xmlMutexPtr">xmlMutexPtr</a>; typedef struct _xmlRMutex <a href="#xmlRMutex">xmlRMutex</a>; typedef <a href="libxml2-threads.html#xmlRMutex">xmlRMutex</a> * <a href="#xmlRMutexPtr">xmlRMutexPtr</a>; int <a href="#xmlCheckThreadLocalStorage">xmlCheckThreadLocalStorage</a> (void); void <a href="#xmlCleanupThreads">xmlCleanupThreads</a> (void); void <a href="#xmlFreeMutex">xmlFreeMutex</a> (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok); void <a href="#xmlFreeRMutex">xmlFreeRMutex</a> (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok); void <a href="#xmlInitThreads">xmlInitThreads</a> (void); void <a href="#xmlLockLibrary">xmlLockLibrary</a> (void); void <a href="#xmlMutexLock">xmlMutexLock</a> (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok); void <a href="#xmlMutexUnlock">xmlMutexUnlock</a> (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok); <a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> <a href="#xmlNewMutex">xmlNewMutex</a> (void); <a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> <a href="#xmlNewRMutex">xmlNewRMutex</a> (void); void <a href="#xmlRMutexLock">xmlRMutexLock</a> (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok); void <a href="#xmlRMutexUnlock">xmlRMutexUnlock</a> (<a href="libxml2-threads.html#xmlRMutexPtr">xmlRMutexPtr</a> tok); void <a href="#xmlUnlockLibrary">xmlUnlockLibrary</a> (void); </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></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></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></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></p> </div> <hr> <div class="refsect2" lang="en"> <h3> <a name="xmlCheckThreadLocalStorage"></a>xmlCheckThreadLocalStorage ()</h3> <pre class="programlisting">int xmlCheckThreadLocalStorage (void)<br> </pre> <p>Check whether thread-local storage could be allocated. In cross-platform code running in multithreaded environments, this function should be called once in each thread before calling other library functions to make sure that thread-local storage was allocated properly.</p> <div class="variablelist"><table border="0"> <col align="left"> <tbody><tr> <td><span class="term"><i><tt>Returns</tt></i>:</span></td> <td>0 on success or -1 if a memory allocation failed. A failed allocation signals a typically fatal and irrecoverable out-of-memory situation. Don't call any library functions in this case. Available since 2.12.0.</td> </tr></tbody> </table></div> </div> <hr> <div class="refsect2" lang="en"> <h3> <a name="xmlCleanupThreads"></a>xmlCleanupThreads ()</h3> <pre class="programlisting">void xmlCleanupThreads (void)<br> </pre> <p>DEPRECATED: This function is a no-op. Call <a href="libxml2-parser.html#xmlCleanupParser">xmlCleanupParser</a> to free global state but see the warnings there. <a href="libxml2-parser.html#xmlCleanupParser">xmlCleanupParser</a> should be only called once at program exit. In most cases, you don't have call cleanup functions at all.</p> </div> <hr> <div class="refsect2" lang="en"> <h3> <a name="xmlFreeMutex"></a>xmlFreeMutex ()</h3> <pre class="programlisting">void xmlFreeMutex (<a href="libxml2-threads.html#xmlMutexPtr">xmlMutexPtr</a> tok)<br> </pre> <p>Free a 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 simple mutex</td> </tr></tbody> </table></div> </div> <hr> <div class="refsect2" lang="en"> <h3> <a name="xmlFreeRMutex"></a>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="xmlInitThreads"></a>xmlInitThreads ()</h3> <pre class="programlisting">void xmlInitThreads (void)<br> </pre> <p>DEPRECATED: Alias for <a href="libxml2-parser.html#xmlInitParser">xmlInitParser</a>.</p> </div> <hr> <div class="refsect2" lang="en"> <h3> <a name="xmlLockLibrary"></a>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"></a>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"></a>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"></a>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"></a>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"></a>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"></a>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"></a>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>