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<!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"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.5"/> <title>Apache Portable Runtime: Internal Memory Allocation</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/search.js"></script> <script type="text/javascript"> $(document).ready(function() { searchBox.OnSelectItem(0); }); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table 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 </td><td class="memItemRight" valign="bottom"><a class="el" href="structapr__memnode__t.html">apr_memnode_t</a></td></tr> <tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a> Macros</h2></td></tr> <tr class="memitem:gaf382851817012929f4e2458b43f4482c"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#gaf382851817012929f4e2458b43f4482c">APR_MEMNODE_T_SIZE</a>   <a class="el" href="group__apr__general.html#gab484e98426221f3212fcb67af0467381">APR_ALIGN_DEFAULT</a>(sizeof(<a class="el" href="structapr__memnode__t.html">apr_memnode_t</a>))</td></tr> <tr class="separator:gaf382851817012929f4e2458b43f4482c"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga54f32b19d8dad59bc6364a7a6b8ebec9"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga54f32b19d8dad59bc6364a7a6b8ebec9">APR_ALLOCATOR_MAX_FREE_UNLIMITED</a>   0</td></tr> <tr class="separator:ga54f32b19d8dad59bc6364a7a6b8ebec9"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a> Typedefs</h2></td></tr> <tr class="memitem:ga1ceabfd30fcfc455e47d052d2a24244b"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a></td></tr> <tr class="separator:ga1ceabfd30fcfc455e47d052d2a24244b"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga3b6437036dfcdffbf87ad4677c818211"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="structapr__memnode__t.html">apr_memnode_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga3b6437036dfcdffbf87ad4677c818211">apr_memnode_t</a></td></tr> <tr class="separator:ga3b6437036dfcdffbf87ad4677c818211"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> Functions</h2></td></tr> <tr class="memitem:gaf834f409a34b7f8656c045cff02fd953"><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__allocator.html#gaf834f409a34b7f8656c045cff02fd953">apr_allocator_create</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> **allocator)</td></tr> <tr class="separator:gaf834f409a34b7f8656c045cff02fd953"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga704529f6b26279ad1c48d5e8372d859c"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga704529f6b26279ad1c48d5e8372d859c">apr_allocator_destroy</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator)</td></tr> <tr class="separator:ga704529f6b26279ad1c48d5e8372d859c"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga7452b0837c2148bd63109f89bbc0c3db"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structapr__memnode__t.html">apr_memnode_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga7452b0837c2148bd63109f89bbc0c3db">apr_allocator_alloc</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator, apr_size_t size)</td></tr> <tr class="separator:ga7452b0837c2148bd63109f89bbc0c3db"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga124e48339838213fd5e160a4125cb7e8"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga124e48339838213fd5e160a4125cb7e8">apr_allocator_free</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator, <a class="el" href="structapr__memnode__t.html">apr_memnode_t</a> *memnode)</td></tr> <tr class="separator:ga124e48339838213fd5e160a4125cb7e8"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga85162b4fb7e68b76dd70beb46947b9e5"><td class="memItemLeft" align="right" valign="top">apr_size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga85162b4fb7e68b76dd70beb46947b9e5">apr_allocator_align</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator, apr_size_t size)</td></tr> <tr class="separator:ga85162b4fb7e68b76dd70beb46947b9e5"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:gadf38bbec37c29c24388e95b1c9acad28"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#gadf38bbec37c29c24388e95b1c9acad28">apr_allocator_owner_set</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator, <a class="el" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> *pool)</td></tr> <tr class="separator:gadf38bbec37c29c24388e95b1c9acad28"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga3cfe48c8717de6495480ce1479d262f1"><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__allocator.html#ga3cfe48c8717de6495480ce1479d262f1">apr_allocator_owner_get</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator)</td></tr> <tr class="separator:ga3cfe48c8717de6495480ce1479d262f1"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga1d45cb6dbe69ba25dee0ec5f4e031d60"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#ga1d45cb6dbe69ba25dee0ec5f4e031d60">apr_allocator_max_free_set</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator, apr_size_t size)</td></tr> <tr class="separator:ga1d45cb6dbe69ba25dee0ec5f4e031d60"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:gab803d74f56683004f7ec384ced210dd5"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__allocator.html#gab803d74f56683004f7ec384ced210dd5">apr_allocator_mutex_set</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator, <a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a> *mutex)</td></tr> <tr class="separator:gab803d74f56683004f7ec384ced210dd5"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga38599aa9f1330846a2d2b25ec5c8d9c9"><td class="memItemLeft" align="right" valign="top"><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__allocator.html#ga38599aa9f1330846a2d2b25ec5c8d9c9">apr_allocator_mutex_get</a> (<a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> *allocator)</td></tr> <tr class="separator:ga38599aa9f1330846a2d2b25ec5c8d9c9"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <h2 class="groupheader">Macro Definition Documentation</h2> <a class="anchor" id="ga54f32b19d8dad59bc6364a7a6b8ebec9"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">#define APR_ALLOCATOR_MAX_FREE_UNLIMITED   0</td> </tr> </table> </div><div class="memdoc"> <p>Symbolic constants </p> </div> </div> <a class="anchor" id="gaf382851817012929f4e2458b43f4482c"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">#define APR_MEMNODE_T_SIZE   <a class="el" href="group__apr__general.html#gab484e98426221f3212fcb67af0467381">APR_ALIGN_DEFAULT</a>(sizeof(<a class="el" href="structapr__memnode__t.html">apr_memnode_t</a>))</td> </tr> </table> </div><div class="memdoc"> <p>The base size of a memory node - aligned. </p> </div> </div> <h2 class="groupheader">Typedef Documentation</h2> <a class="anchor" id="ga1ceabfd30fcfc455e47d052d2a24244b"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">typedef struct <a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> <a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a></td> </tr> </table> </div><div class="memdoc"> <p>the allocator structure </p> </div> </div> <a class="anchor" id="ga3b6437036dfcdffbf87ad4677c818211"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">typedef struct <a class="el" href="structapr__memnode__t.html">apr_memnode_t</a> <a class="el" href="structapr__memnode__t.html">apr_memnode_t</a></td> </tr> </table> </div><div class="memdoc"> <p>the structure which holds information about the allocation </p> </div> </div> <h2 class="groupheader">Function Documentation</h2> <a class="anchor" id="ga85162b4fb7e68b76dd70beb46947b9e5"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">apr_size_t apr_allocator_align </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">apr_size_t </td> <td class="paramname"><em>size</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Get the true size that would be allocated for the given size (including the header and alignment). </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">list</td><td>The allocator from which to the memory would be allocated </td></tr> <tr><td class="paramname">size</td><td>The size to align </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>The aligned size (or zero on apr_size_t overflow) </dd></dl> </div> </div> <a class="anchor" id="ga7452b0837c2148bd63109f89bbc0c3db"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="structapr__memnode__t.html">apr_memnode_t</a>* apr_allocator_alloc </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">apr_size_t </td> <td class="paramname"><em>size</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Allocate a block of mem from the allocator </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator to allocate from </td></tr> <tr><td class="paramname">size</td><td>The size of the mem to allocate (excluding the memnode structure) </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="gaf834f409a34b7f8656c045cff02fd953"></a> <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_allocator_create </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> ** </td> <td class="paramname"><em>allocator</em></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Create a new allocator </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator we have just created. </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="ga704529f6b26279ad1c48d5e8372d859c"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void apr_allocator_destroy </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Destroy an allocator </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator to be destroyed </td></tr> </table> </dd> </dl> <dl class="section remark"><dt>Remarks</dt><dd>Any memnodes not given back to the allocator prior to destroying will <em>not</em> be free()d. </dd></dl> </div> </div> <a class="anchor" id="ga124e48339838213fd5e160a4125cb7e8"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void apr_allocator_free </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="structapr__memnode__t.html">apr_memnode_t</a> * </td> <td class="paramname"><em>memnode</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Free a list of blocks of mem, giving them back to the allocator. The list is typically terminated by a memnode with its next field set to NULL. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator to give the mem back to </td></tr> <tr><td class="paramname">memnode</td><td>The memory node to return </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="ga1d45cb6dbe69ba25dee0ec5f4e031d60"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void apr_allocator_max_free_set </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">apr_size_t </td> <td class="paramname"><em>size</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Set the current threshold at which the allocator should start giving blocks back to the system. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator to set the threshold on </td></tr> <tr><td class="paramname">size</td><td>The threshold. 0 == unlimited. </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="ga38599aa9f1330846a2d2b25ec5c8d9c9"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__apr__thread__mutex.html#ga95712060ba3a192036416e1ccef1db75">apr_thread_mutex_t</a>* apr_allocator_mutex_get </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Get the mutex currently set for the allocator </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="gab803d74f56683004f7ec384ced210dd5"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void apr_allocator_mutex_set </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em>, </td> </tr> <tr> <td class="paramkey"></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></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Set a mutex for the allocator to use </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator to set the mutex for </td></tr> <tr><td class="paramname">mutex</td><td>The mutex </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="ga3cfe48c8717de6495480ce1479d262f1"></a> <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_allocator_owner_get </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</em></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Get the current owner of the allocator </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator to get the owner from </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="gadf38bbec37c29c24388e95b1c9acad28"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void apr_allocator_owner_set </td> <td>(</td> <td class="paramtype"><a class="el" href="group__apr__allocator.html#ga1ceabfd30fcfc455e47d052d2a24244b">apr_allocator_t</a> * </td> <td class="paramname"><em>allocator</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> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Set the owner of the allocator </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">allocator</td><td>The allocator to set the owner for </td></tr> <tr><td class="paramname">pool</td><td>The pool that is to own the allocator </td></tr> </table> </dd> </dl> <dl class="section remark"><dt>Remarks</dt><dd>Typically pool is the highest level pool using the allocator </dd></dl> </div> </div> </div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.5 </small></address> </body> </html>