docs/api-2.1/mempool_8h.html@aa0d09f2d81c
docs/api-2.1/mempool_8h.html
Sun, 16 Apr 2023 21:35:08 +0200
- author
- Mike Becker <universe@uap-core.de>
- date
- Sun, 16 Apr 2023 21:35:08 +0200
- changeset 683
- aa0d09f2d81c
- parent 390
- d345541018fa
- permissions
- -rw-r--r--
add convenience functions for allocating a buffer on the heap
<!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 1.8.13"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>ucx: /home/mike/workspace/c/ucx/src/ucx/mempool.h File Reference</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/searchdata.js"></script> <script type="text/javascript" src="search/search.js"></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 cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectlogo"><img alt="Logo" src="uaplogo.png"/></td> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">ucx </div> <div id="projectbrief">UAP Common Extensions</div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.13 --> <script type="text/javascript"> var searchBox = new SearchBox("searchBox", "search",false,'Search'); </script> <script type="text/javascript" src="menudata.js"></script> <script type="text/javascript" src="menu.js"></script> <script type="text/javascript"> $(function() { initMenu('',true,false,'search.php','Search'); $(document).ready(function() { init_search(); }); }); </script> <div id="main-nav"></div> <!-- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> </div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="javascript:void(0)" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_69f4ea29401808fe6229564976cde3ce.html">ucx</a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="summary"> <a href="#nested-classes">Data Structures</a> | <a href="#define-members">Macros</a> | <a href="#func-members">Functions</a> </div> <div class="headertitle"> <div class="title">mempool.h File Reference</div> </div> </div><!--header--> <div class="contents"> <p>Memory pool implementation. <a href="#details">More...</a></p> <div class="textblock"><code>#include "<a class="el" href="ucx_8h_source.html">ucx.h</a>"</code><br /> <code>#include "<a class="el" href="allocator_8h_source.html">allocator.h</a>"</code><br /> <code>#include <stddef.h></code><br /> </div> <p><a href="mempool_8h_source.html">Go to the source code of this file.</a></p> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a> Data Structures</h2></td></tr> <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structUcxMempool.html">UcxMempool</a></td></tr> <tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">UCX mempool structure. <a href="structUcxMempool.html#details">More...</a><br /></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:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a49f7bd1da5ac201d0cf54dc0f0d82dd2">ucx_mempool_new_default</a>()   <a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a>(16)</td></tr> <tr class="memdesc:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="mdescLeft"> </td><td class="mdescRight">Shorthand for a new default memory pool with a capacity of 16 elements. <a href="#a49f7bd1da5ac201d0cf54dc0f0d82dd2">More...</a><br /></td></tr> <tr class="separator:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><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:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a> (size_t n)</td></tr> <tr class="memdesc:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="mdescLeft"> </td><td class="mdescRight">Creates a memory pool with the specified initial size. <a href="#ad71cb8c3b6fdb30360376a8b372ef22a">More...</a><br /></td></tr> <tr class="separator:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:aaf75b5016098723a9280531ccc3a6d77"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#aaf75b5016098723a9280531ccc3a6d77">ucx_mempool_chcap</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, size_t newcap)</td></tr> <tr class="memdesc:aaf75b5016098723a9280531ccc3a6d77"><td class="mdescLeft"> </td><td class="mdescRight">Resizes a memory pool. <a href="#aaf75b5016098723a9280531ccc3a6d77">More...</a><br /></td></tr> <tr class="separator:aaf75b5016098723a9280531ccc3a6d77"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a2ae492b8f2878ccc9837ac213dced11e"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a2ae492b8f2878ccc9837ac213dced11e">ucx_mempool_malloc</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, size_t n)</td></tr> <tr class="memdesc:a2ae492b8f2878ccc9837ac213dced11e"><td class="mdescLeft"> </td><td class="mdescRight">Allocates pooled memory. <a href="#a2ae492b8f2878ccc9837ac213dced11e">More...</a><br /></td></tr> <tr class="separator:a2ae492b8f2878ccc9837ac213dced11e"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a4b9142011824ae24f00fabe128417d69"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a4b9142011824ae24f00fabe128417d69">ucx_mempool_calloc</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, size_t nelem, size_t elsize)</td></tr> <tr class="memdesc:a4b9142011824ae24f00fabe128417d69"><td class="mdescLeft"> </td><td class="mdescRight">Allocates a pooled memory array. <a href="#a4b9142011824ae24f00fabe128417d69">More...</a><br /></td></tr> <tr class="separator:a4b9142011824ae24f00fabe128417d69"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a660ef42520ed6737c2e77aae18e3a7a4"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a660ef42520ed6737c2e77aae18e3a7a4">ucx_mempool_realloc</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, void *ptr, size_t n)</td></tr> <tr class="memdesc:a660ef42520ed6737c2e77aae18e3a7a4"><td class="mdescLeft"> </td><td class="mdescRight">Reallocates pooled memory. <a href="#a660ef42520ed6737c2e77aae18e3a7a4">More...</a><br /></td></tr> <tr class="separator:a660ef42520ed6737c2e77aae18e3a7a4"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:aefa26e3015f5aefadbfc74221bd246ac"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#aefa26e3015f5aefadbfc74221bd246ac">ucx_mempool_free</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, void *ptr)</td></tr> <tr class="memdesc:aefa26e3015f5aefadbfc74221bd246ac"><td class="mdescLeft"> </td><td class="mdescRight">Frees pooled memory. <a href="#aefa26e3015f5aefadbfc74221bd246ac">More...</a><br /></td></tr> <tr class="separator:aefa26e3015f5aefadbfc74221bd246ac"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:af096378da7e9bfbed3088497cf4c15bf"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#af096378da7e9bfbed3088497cf4c15bf">ucx_mempool_destroy</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool)</td></tr> <tr class="memdesc:af096378da7e9bfbed3088497cf4c15bf"><td class="mdescLeft"> </td><td class="mdescRight">Destroys a memory pool. <a href="#af096378da7e9bfbed3088497cf4c15bf">More...</a><br /></td></tr> <tr class="separator:af096378da7e9bfbed3088497cf4c15bf"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:adb788e7ec24cd7dbdea6381539c549f2"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#adb788e7ec24cd7dbdea6381539c549f2">ucx_mempool_set_destr</a> (void *ptr, <a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> func)</td></tr> <tr class="memdesc:adb788e7ec24cd7dbdea6381539c549f2"><td class="mdescLeft"> </td><td class="mdescRight">Sets a destructor function for the specified memory. <a href="#adb788e7ec24cd7dbdea6381539c549f2">More...</a><br /></td></tr> <tr class="separator:adb788e7ec24cd7dbdea6381539c549f2"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#af47b6b7c40f8f263dc28cc9a4e77b27c">ucx_mempool_reg_destr</a> (<a class="el" href="structUcxMempool.html">UcxMempool</a> *pool, void *ptr, <a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> destr)</td></tr> <tr class="memdesc:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="mdescLeft"> </td><td class="mdescRight">Registers a destructor function for the specified (non-pooled) memory. <a href="#af47b6b7c40f8f263dc28cc9a4e77b27c">More...</a><br /></td></tr> <tr class="separator:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <div class="textblock"><p>Memory pool implementation. </p> <dl class="section author"><dt>Author</dt><dd>Mike Becker </dd> <dd> Olaf Wintermann </dd></dl> </div><h2 class="groupheader">Macro Definition Documentation</h2> <a id="a49f7bd1da5ac201d0cf54dc0f0d82dd2"></a> <h2 class="memtitle"><span class="permalink"><a href="#a49f7bd1da5ac201d0cf54dc0f0d82dd2">◆ </a></span>ucx_mempool_new_default</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">#define ucx_mempool_new_default</td> <td>(</td> <td class="paramname"></td><td>)</td> <td>   <a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a>(16)</td> </tr> </table> </div><div class="memdoc"> <p>Shorthand for a new default memory pool with a capacity of 16 elements. </p> </div> </div> <h2 class="groupheader">Function Documentation</h2> <a id="a4b9142011824ae24f00fabe128417d69"></a> <h2 class="memtitle"><span class="permalink"><a href="#a4b9142011824ae24f00fabe128417d69">◆ </a></span>ucx_mempool_calloc()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void* ucx_mempool_calloc </td> <td>(</td> <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td> <td class="paramname"><em>pool</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">size_t </td> <td class="paramname"><em>nelem</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">size_t </td> <td class="paramname"><em>elsize</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Allocates a pooled memory array. </p> <p>The content of the allocated memory is set to zero.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pool</td><td>the memory pool </td></tr> <tr><td class="paramname">nelem</td><td>amount of elements to allocate </td></tr> <tr><td class="paramname">elsize</td><td>amount of memory per element </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>a pointer to the allocated memory </dd></dl> <dl class="section see"><dt>See also</dt><dd><a class="el" href="allocator_8h.html#a2c0aba4221c1ac6801f03ed799f15b12" title="A function pointer to the allocators calloc() function. ">ucx_allocator_calloc()</a> </dd></dl> </div> </div> <a id="aaf75b5016098723a9280531ccc3a6d77"></a> <h2 class="memtitle"><span class="permalink"><a href="#aaf75b5016098723a9280531ccc3a6d77">◆ </a></span>ucx_mempool_chcap()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int ucx_mempool_chcap </td> <td>(</td> <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td> <td class="paramname"><em>pool</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">size_t </td> <td class="paramname"><em>newcap</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Resizes a memory pool. </p> <p>This function will fail if the new capacity is not sufficient for the present data.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pool</td><td>the pool to resize </td></tr> <tr><td class="paramname">newcap</td><td>the new capacity </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>zero on success or non-zero on failure </dd></dl> </div> </div> <a id="af096378da7e9bfbed3088497cf4c15bf"></a> <h2 class="memtitle"><span class="permalink"><a href="#af096378da7e9bfbed3088497cf4c15bf">◆ </a></span>ucx_mempool_destroy()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void ucx_mempool_destroy </td> <td>(</td> <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td> <td class="paramname"><em>pool</em></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Destroys a memory pool. </p> <p>For each element the destructor function (if any) is called and the element is freed.</p> <p>Each of the registered destructor function that has no corresponding element within the pool (namely those registered by ucx_mempool_reg_destr) is called interleaving with the element destruction, but with guarantee to the order in which they were registered (FIFO order).</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pool</td><td>the mempool to destroy </td></tr> </table> </dd> </dl> </div> </div> <a id="aefa26e3015f5aefadbfc74221bd246ac"></a> <h2 class="memtitle"><span class="permalink"><a href="#aefa26e3015f5aefadbfc74221bd246ac">◆ </a></span>ucx_mempool_free()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void ucx_mempool_free </td> <td>(</td> <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td> <td class="paramname"><em>pool</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">void * </td> <td class="paramname"><em>ptr</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Frees pooled memory. </p> <p>Before freeing the memory, the specified destructor function (if any) is called.</p> <p>If you specify memory, that is not pooled by the specified memory pool, the program will terminate with a call to <code>abort()</code>.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pool</td><td>the memory pool </td></tr> <tr><td class="paramname">ptr</td><td>a pointer to the memory that shall be freed </td></tr> </table> </dd> </dl> <dl class="section see"><dt>See also</dt><dd><a class="el" href="mempool_8h.html#adb788e7ec24cd7dbdea6381539c549f2" title="Sets a destructor function for the specified memory. ">ucx_mempool_set_destr()</a> </dd></dl> </div> </div> <a id="a2ae492b8f2878ccc9837ac213dced11e"></a> <h2 class="memtitle"><span class="permalink"><a href="#a2ae492b8f2878ccc9837ac213dced11e">◆ </a></span>ucx_mempool_malloc()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void* ucx_mempool_malloc </td> <td>(</td> <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td> <td class="paramname"><em>pool</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">size_t </td> <td class="paramname"><em>n</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Allocates pooled memory. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pool</td><td>the memory pool </td></tr> <tr><td class="paramname">n</td><td>amount of memory to allocate </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>a pointer to the allocated memory </dd></dl> <dl class="section see"><dt>See also</dt><dd><a class="el" href="allocator_8h.html#a29f0f6a23a70db3b60635cd6dc384473" title="A function pointer to the allocators malloc() function. ">ucx_allocator_malloc()</a> </dd></dl> </div> </div> <a id="ad71cb8c3b6fdb30360376a8b372ef22a"></a> <h2 class="memtitle"><span class="permalink"><a href="#ad71cb8c3b6fdb30360376a8b372ef22a">◆ </a></span>ucx_mempool_new()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="structUcxMempool.html">UcxMempool</a>* ucx_mempool_new </td> <td>(</td> <td class="paramtype">size_t </td> <td class="paramname"><em>n</em></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Creates a memory pool with the specified initial size. </p> <p>As the created memory pool automatically grows in size by factor two when trying to allocate memory on a full pool, it is recommended that you use a power of two for the initial size.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">n</td><td>initial pool size (should be a power of two, e.g. 16) </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>a pointer to the new memory pool </dd></dl> <dl class="section see"><dt>See also</dt><dd><a class="el" href="mempool_8h.html#a49f7bd1da5ac201d0cf54dc0f0d82dd2" title="Shorthand for a new default memory pool with a capacity of 16 elements. ">ucx_mempool_new_default()</a> </dd></dl> </div> </div> <a id="a660ef42520ed6737c2e77aae18e3a7a4"></a> <h2 class="memtitle"><span class="permalink"><a href="#a660ef42520ed6737c2e77aae18e3a7a4">◆ </a></span>ucx_mempool_realloc()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void* ucx_mempool_realloc </td> <td>(</td> <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td> <td class="paramname"><em>pool</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">void * </td> <td class="paramname"><em>ptr</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">size_t </td> <td class="paramname"><em>n</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Reallocates pooled memory. </p> <p>If the memory to be reallocated is not contained by the specified pool, the behavior is undefined.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pool</td><td>the memory pool </td></tr> <tr><td class="paramname">ptr</td><td>a pointer to the memory that shall be reallocated </td></tr> <tr><td class="paramname">n</td><td>the new size of the memory </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>a pointer to the new location of the memory </dd></dl> <dl class="section see"><dt>See also</dt><dd><a class="el" href="allocator_8h.html#a6d7cf038a806e327c5da37321d04e426" title="A function pointer to the allocators realloc() function. ">ucx_allocator_realloc()</a> </dd></dl> </div> </div> <a id="af47b6b7c40f8f263dc28cc9a4e77b27c"></a> <h2 class="memtitle"><span class="permalink"><a href="#af47b6b7c40f8f263dc28cc9a4e77b27c">◆ </a></span>ucx_mempool_reg_destr()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void ucx_mempool_reg_destr </td> <td>(</td> <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> * </td> <td class="paramname"><em>pool</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">void * </td> <td class="paramname"><em>ptr</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> </td> <td class="paramname"><em>destr</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Registers a destructor function for the specified (non-pooled) memory. </p> <p>This is useful, if you have memory that has not been allocated by a mempool, but shall be managed by a mempool.</p> <p>This function creates an entry in the specified mempool and the memory will therefore (logically) convert to pooled memory. <b>However, this does not cause the memory to be freed automatically!</b>. If you want to use this function, make the memory pool free non-pooled memory, the specified destructor function must call <code>free()</code> by itself. But keep in mind, that you then MUST NOT use this destructor function with pooled memory (e.g. in <a class="el" href="mempool_8h.html#adb788e7ec24cd7dbdea6381539c549f2" title="Sets a destructor function for the specified memory. ">ucx_mempool_set_destr()</a>), as it would cause a double-free.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pool</td><td>the memory pool </td></tr> <tr><td class="paramname">ptr</td><td>data the destructor is registered for </td></tr> <tr><td class="paramname">destr</td><td>a pointer to the destructor function </td></tr> </table> </dd> </dl> </div> </div> <a id="adb788e7ec24cd7dbdea6381539c549f2"></a> <h2 class="memtitle"><span class="permalink"><a href="#adb788e7ec24cd7dbdea6381539c549f2">◆ </a></span>ucx_mempool_set_destr()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void ucx_mempool_set_destr </td> <td>(</td> <td class="paramtype">void * </td> <td class="paramname"><em>ptr</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a> </td> <td class="paramname"><em>func</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Sets a destructor function for the specified memory. </p> <p>The destructor is automatically called when the memory is freed or the pool is destroyed. A destructor for pooled memory <b>MUST NOT</b> free the memory itself, as this is done by the pool. Use a destructor to free any resources managed by the pooled object.</p> <p>The only requirement for the specified memory is, that it <b>MUST</b> be pooled memory by a <a class="el" href="structUcxMempool.html" title="UCX mempool structure. ">UcxMempool</a> or an element-compatible mempool. The pointer to the destructor function is saved in a reserved area before the actual memory.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">ptr</td><td>pooled memory </td></tr> <tr><td class="paramname">func</td><td>a pointer to the destructor function </td></tr> </table> </dd> </dl> <dl class="section see"><dt>See also</dt><dd><a class="el" href="mempool_8h.html#aefa26e3015f5aefadbfc74221bd246ac" title="Frees pooled memory. ">ucx_mempool_free()</a> </dd> <dd> <a class="el" href="mempool_8h.html#af096378da7e9bfbed3088497cf4c15bf" title="Destroys a memory pool. ">ucx_mempool_destroy()</a> </dd></dl> </div> </div> </div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated on Thu Dec 19 2019 19:58:24 for ucx by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.13 </small></address> </body> </html>
