<!-- This comment will put IE 6, 7 and 8 in quirks mode --> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>Apache Portable Runtime: Thread Mutex Routines</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javaScript" src="search/search.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body onload='searchBox.OnSelectItem(0);'> <!-- Generated by Doxygen 1.6.3 --> <script type="text/javascript"><!-- var searchBox = new SearchBox("searchBox", "search",false,'Search'); --></script> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="annotated.html"><span>Data Structures</span></a></li> <li><a href="files.html"><span>Files</span></a></li> <li> <div id="MSearchBox" class="MSearchBoxInactive"> <img id="MSearchSelect" src="search/search.png" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" alt=""/> <input type="text" id="MSearchField" value="Search" accesskey="S" onfocus="searchBox.OnSearchFieldFocus(true)" onblur="searchBox.OnSearchFieldFocus(false)" onkeyup="searchBox.OnSearchFieldChange(event)"/> <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> </div> </li> </ul> </div> </div> <div class="contents"> <h1>Thread Mutex Routines<br/> <small> [<a class="el" href="group___a_p_r.html">Apache Portability Runtime library</a>]</small> </h1><table border="0" cellpadding="0" cellspacing="0"> <tr><td colspan="2"><h2>Defines</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#ga579050872f9aff06e773b084264f7d06">APR_THREAD_MUTEX_DEFAULT</a> 0x0</td></tr> <tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#gaf421e0445dbc3c739130f5f6544c2e78">APR_THREAD_MUTEX_NESTED</a> 0x1</td></tr> <tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#gac31107f3db115edc0c26ea48943c6a16">APR_THREAD_MUTEX_UNNESTED</a> 0x2</td></tr> <tr><td colspan="2"><h2>Typedefs</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a></td></tr> <tr><td colspan="2"><h2>Functions</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#ga927e99580a669f577fbcb6508814ff12">apr_thread_mutex_create</a> (<a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> **mutex, unsigned int flags, <a class="el" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> *pool)</td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#ga1430fd10d8d260c0e3832c959742a977">apr_thread_mutex_lock</a> (<a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> *mutex)</td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#ga6ac9c8ebee83ff89416f00231a858798">apr_thread_mutex_trylock</a> (<a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> *mutex)</td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#ga74e58f753737283f9b826d8cdcbcb4bf">apr_thread_mutex_unlock</a> (<a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> *mutex)</td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#gae80e6f9c2a2fbaa94f5a6954e02118f4">apr_thread_mutex_destroy</a> (<a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> *mutex)</td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__thread__mutex.html#gafec9362d92f8bd67660b97cb3c246544">apr_thread_mutex_pool_get</a> (const <a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> *thethread_mutex)</td></tr> </table> <hr/><h2>Define Documentation</h2> <a class="anchor" id="ga579050872f9aff06e773b084264f7d06"></a><!-- doxytag: member="apr_thread_mutex.h::APR_THREAD_MUTEX_DEFAULT" ref="ga579050872f9aff06e773b084264f7d06" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">#define APR_THREAD_MUTEX_DEFAULT 0x0</td> </tr> </table> </div> <div class="memdoc"> <p>platform-optimal lock behavior </p> </div> </div> <a class="anchor" id="gaf421e0445dbc3c739130f5f6544c2e78"></a><!-- doxytag: member="apr_thread_mutex.h::APR_THREAD_MUTEX_NESTED" ref="gaf421e0445dbc3c739130f5f6544c2e78" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">#define APR_THREAD_MUTEX_NESTED 0x1</td> </tr> </table> </div> <div class="memdoc"> <p>enable nested (recursive) locks </p> </div> </div> <a class="anchor" id="gac31107f3db115edc0c26ea48943c6a16"></a><!-- doxytag: member="apr_thread_mutex.h::APR_THREAD_MUTEX_UNNESTED" ref="gac31107f3db115edc0c26ea48943c6a16" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">#define APR_THREAD_MUTEX_UNNESTED 0x2</td> </tr> </table> </div> <div class="memdoc"> <p>disable nested locks </p> </div> </div> <hr/><h2>Typedef Documentation</h2> <a class="anchor" id="ga95712060ba3a192036416e1ccef1db75"></a><!-- doxytag: member="apr_thread_mutex.h::apr_thread_mutex_t" ref="ga95712060ba3a192036416e1ccef1db75" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">typedef struct <a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> <a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a></td> </tr> </table> </div> <div class="memdoc"> <p>Opaque thread-local mutex structure </p> </div> </div> <hr/><h2>Function Documentation</h2> <a class="anchor" id="ga927e99580a669f577fbcb6508814ff12"></a><!-- doxytag: member="apr_thread_mutex.h::apr_thread_mutex_create" ref="ga927e99580a669f577fbcb6508814ff12" args="(apr_thread_mutex_t **mutex, unsigned int flags, apr_pool_t *pool)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> apr_thread_mutex_create </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> ** </td> <td class="paramname"> <em>mutex</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">unsigned int </td> <td class="paramname"> <em>flags</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> * </td> <td class="paramname"> <em>pool</em></td><td> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td><td></td> </tr> </table> </div> <div class="memdoc"> <p>Create and initialize a mutex that can be used to synchronize threads. </p> <dl><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>mutex</em> </td><td>the memory address where the newly created mutex will be stored. </td></tr> <tr><td valign="top"></td><td valign="top"><em>flags</em> </td><td>Or'ed value of: </p> <pre> APR_THREAD_MUTEX_DEFAULT platform-optimal lock behavior. APR_THREAD_MUTEX_NESTED enable nested (recursive) locks. APR_THREAD_MUTEX_UNNESTED disable nested locks (non-recursive). </pre> </td></tr> <tr><td valign="top"></td><td valign="top"><em>pool</em> </td><td>the pool from which to allocate the mutex. </td></tr> </table> </dd> </dl> <dl class="warning"><dt><b>Warning:</b></dt><dd>Be cautious in using APR_THREAD_MUTEX_DEFAULT. While this is the most optimial mutex based on a given platform's performance charateristics, it will behave as either a nested or an unnested lock. </dd></dl> </div> </div> <a class="anchor" id="gae80e6f9c2a2fbaa94f5a6954e02118f4"></a><!-- doxytag: member="apr_thread_mutex.h::apr_thread_mutex_destroy" ref="gae80e6f9c2a2fbaa94f5a6954e02118f4" args="(apr_thread_mutex_t *mutex)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> apr_thread_mutex_destroy </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> * </td> <td class="paramname"> <em>mutex</em></td> <td> ) </td> <td></td> </tr> </table> </div> <div class="memdoc"> <p>Destroy the mutex and free the memory associated with the lock. </p> <dl><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>mutex</em> </td><td>the mutex to destroy. </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="ga1430fd10d8d260c0e3832c959742a977"></a><!-- doxytag: member="apr_thread_mutex.h::apr_thread_mutex_lock" ref="ga1430fd10d8d260c0e3832c959742a977" args="(apr_thread_mutex_t *mutex)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> apr_thread_mutex_lock </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> * </td> <td class="paramname"> <em>mutex</em></td> <td> ) </td> <td></td> </tr> </table> </div> <div class="memdoc"> <p>Acquire the lock for the given mutex. If the mutex is already locked, the current thread will be put to sleep until the lock becomes available. </p> <dl><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>mutex</em> </td><td>the mutex on which to acquire the lock. </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="gafec9362d92f8bd67660b97cb3c246544"></a><!-- doxytag: member="apr_thread_mutex.h::apr_thread_mutex_pool_get" ref="gafec9362d92f8bd67660b97cb3c246544" args="(const apr_thread_mutex_t *thethread_mutex)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a>* apr_thread_mutex_pool_get </td> <td>(</td> <td class="paramtype">const <a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> * </td> <td class="paramname"> <em>thethread_mutex</em></td> <td> ) </td> <td></td> </tr> </table> </div> <div class="memdoc"> <p>Get the pool used by this thread_mutex. </p> <dl class="return"><dt><b>Returns:</b></dt><dd>apr_pool_t the pool </dd></dl> </div> </div> <a class="anchor" id="ga6ac9c8ebee83ff89416f00231a858798"></a><!-- doxytag: member="apr_thread_mutex.h::apr_thread_mutex_trylock" ref="ga6ac9c8ebee83ff89416f00231a858798" args="(apr_thread_mutex_t *mutex)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> apr_thread_mutex_trylock </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> * </td> <td class="paramname"> <em>mutex</em></td> <td> ) </td> <td></td> </tr> </table> </div> <div class="memdoc"> <p>Attempt to acquire the lock for the given mutex. If the mutex has already been acquired, the call returns immediately with APR_EBUSY. Note: it is important that the <a class="el" href="group___a_p_r___s_t_a_t_u_s___i_s.html#gabb92ad7b6ef304132de70e9e5cbaa896">APR_STATUS_IS_EBUSY(s)</a> macro be used to determine if the return value was APR_EBUSY, for portability reasons. </p> <dl><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>mutex</em> </td><td>the mutex on which to attempt the lock acquiring. </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="ga74e58f753737283f9b826d8cdcbcb4bf"></a><!-- doxytag: member="apr_thread_mutex.h::apr_thread_mutex_unlock" ref="ga74e58f753737283f9b826d8cdcbcb4bf" args="(apr_thread_mutex_t *mutex)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a> apr_thread_mutex_unlock </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> * </td> <td class="paramname"> <em>mutex</em></td> <td> ) </td> <td></td> </tr> </table> </div> <div class="memdoc"> <p>Release the lock for the given mutex. </p> <dl><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>mutex</em> </td><td>the mutex from which to release the lock. </td></tr> </table> </dd> </dl> </div> </div> </div> <!--- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> <a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Defines</a></div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <hr class="footer"/><address style="text-align: right;"><small>Generated on Tue Feb 14 10:09:01 2012 for Apache Portable Runtime by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.3 </small></address> </body> </html>