docs/api-2.1/mempool_8h.html

Tue, 22 Oct 2024 22:42:48 +0200

author
Mike Becker <universe@uap-core.de>
date
Tue, 22 Oct 2024 22:42:48 +0200
changeset 945
84a5fab8a47c
parent 390
d345541018fa
permissions
-rw-r--r--

add cx_nmemb() utility

390
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1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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8 <title>ucx: /home/mike/workspace/c/ucx/src/ucx/mempool.h File Reference</title>
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22 <tr style="height: 56px;">
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23 <td id="projectlogo"><img alt="Logo" src="uaplogo.png"/></td>
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25 <div id="projectname">ucx
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26 </div>
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27 <div id="projectbrief">UAP Common Extensions</div>
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28 </td>
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29 </tr>
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30 </tbody>
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31 </table>
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32 </div>
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33 <!-- end header part -->
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62 <ul>
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63 <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>
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64 </div>
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65 </div><!-- top -->
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66 <div class="header">
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67 <div class="summary">
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68 <a href="#nested-classes">Data Structures</a> &#124;
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69 <a href="#define-members">Macros</a> &#124;
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70 <a href="#func-members">Functions</a> </div>
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71 <div class="headertitle">
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72 <div class="title">mempool.h File Reference</div> </div>
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73 </div><!--header-->
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74 <div class="contents">
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75
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76 <p>Memory pool implementation.
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77 <a href="#details">More...</a></p>
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78 <div class="textblock"><code>#include &quot;<a class="el" href="ucx_8h_source.html">ucx.h</a>&quot;</code><br />
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79 <code>#include &quot;<a class="el" href="allocator_8h_source.html">allocator.h</a>&quot;</code><br />
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80 <code>#include &lt;stddef.h&gt;</code><br />
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81 </div>
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82 <p><a href="mempool_8h_source.html">Go to the source code of this file.</a></p>
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83 <table class="memberdecls">
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84 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
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85 Data Structures</h2></td></tr>
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86 <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structUcxMempool.html">UcxMempool</a></td></tr>
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87 <tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">UCX mempool structure. <a href="structUcxMempool.html#details">More...</a><br /></td></tr>
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88 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
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89 </table><table class="memberdecls">
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90 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
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91 Macros</h2></td></tr>
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92 <tr class="memitem:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#a49f7bd1da5ac201d0cf54dc0f0d82dd2">ucx_mempool_new_default</a>()&#160;&#160;&#160;<a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a>(16)</td></tr>
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93 <tr class="memdesc:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="mdescLeft">&#160;</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>
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94 <tr class="separator:a49f7bd1da5ac201d0cf54dc0f0d82dd2"><td class="memSeparator" colspan="2">&#160;</td></tr>
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95 </table><table class="memberdecls">
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96 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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97 Functions</h2></td></tr>
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98 <tr class="memitem:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a> (size_t n)</td></tr>
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99 <tr class="memdesc:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates a memory pool with the specified initial size. <a href="#ad71cb8c3b6fdb30360376a8b372ef22a">More...</a><br /></td></tr>
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100 <tr class="separator:ad71cb8c3b6fdb30360376a8b372ef22a"><td class="memSeparator" colspan="2">&#160;</td></tr>
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101 <tr class="memitem:aaf75b5016098723a9280531ccc3a6d77"><td class="memItemLeft" align="right" valign="top">int&#160;</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>
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102 <tr class="memdesc:aaf75b5016098723a9280531ccc3a6d77"><td class="mdescLeft">&#160;</td><td class="mdescRight">Resizes a memory pool. <a href="#aaf75b5016098723a9280531ccc3a6d77">More...</a><br /></td></tr>
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103 <tr class="separator:aaf75b5016098723a9280531ccc3a6d77"><td class="memSeparator" colspan="2">&#160;</td></tr>
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104 <tr class="memitem:a2ae492b8f2878ccc9837ac213dced11e"><td class="memItemLeft" align="right" valign="top">void *&#160;</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>
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105 <tr class="memdesc:a2ae492b8f2878ccc9837ac213dced11e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Allocates pooled memory. <a href="#a2ae492b8f2878ccc9837ac213dced11e">More...</a><br /></td></tr>
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106 <tr class="separator:a2ae492b8f2878ccc9837ac213dced11e"><td class="memSeparator" colspan="2">&#160;</td></tr>
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107 <tr class="memitem:a4b9142011824ae24f00fabe128417d69"><td class="memItemLeft" align="right" valign="top">void *&#160;</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>
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108 <tr class="memdesc:a4b9142011824ae24f00fabe128417d69"><td class="mdescLeft">&#160;</td><td class="mdescRight">Allocates a pooled memory array. <a href="#a4b9142011824ae24f00fabe128417d69">More...</a><br /></td></tr>
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109 <tr class="separator:a4b9142011824ae24f00fabe128417d69"><td class="memSeparator" colspan="2">&#160;</td></tr>
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110 <tr class="memitem:a660ef42520ed6737c2e77aae18e3a7a4"><td class="memItemLeft" align="right" valign="top">void *&#160;</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>
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111 <tr class="memdesc:a660ef42520ed6737c2e77aae18e3a7a4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reallocates pooled memory. <a href="#a660ef42520ed6737c2e77aae18e3a7a4">More...</a><br /></td></tr>
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112 <tr class="separator:a660ef42520ed6737c2e77aae18e3a7a4"><td class="memSeparator" colspan="2">&#160;</td></tr>
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113 <tr class="memitem:aefa26e3015f5aefadbfc74221bd246ac"><td class="memItemLeft" align="right" valign="top">void&#160;</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>
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114 <tr class="memdesc:aefa26e3015f5aefadbfc74221bd246ac"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees pooled memory. <a href="#aefa26e3015f5aefadbfc74221bd246ac">More...</a><br /></td></tr>
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115 <tr class="separator:aefa26e3015f5aefadbfc74221bd246ac"><td class="memSeparator" colspan="2">&#160;</td></tr>
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116 <tr class="memitem:af096378da7e9bfbed3088497cf4c15bf"><td class="memItemLeft" align="right" valign="top">void&#160;</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>
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117 <tr class="memdesc:af096378da7e9bfbed3088497cf4c15bf"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destroys a memory pool. <a href="#af096378da7e9bfbed3088497cf4c15bf">More...</a><br /></td></tr>
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118 <tr class="separator:af096378da7e9bfbed3088497cf4c15bf"><td class="memSeparator" colspan="2">&#160;</td></tr>
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119 <tr class="memitem:adb788e7ec24cd7dbdea6381539c549f2"><td class="memItemLeft" align="right" valign="top">void&#160;</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>
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120 <tr class="memdesc:adb788e7ec24cd7dbdea6381539c549f2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets a destructor function for the specified memory. <a href="#adb788e7ec24cd7dbdea6381539c549f2">More...</a><br /></td></tr>
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121 <tr class="separator:adb788e7ec24cd7dbdea6381539c549f2"><td class="memSeparator" colspan="2">&#160;</td></tr>
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122 <tr class="memitem:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="memItemLeft" align="right" valign="top">void&#160;</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>
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123 <tr class="memdesc:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Registers a destructor function for the specified (non-pooled) memory. <a href="#af47b6b7c40f8f263dc28cc9a4e77b27c">More...</a><br /></td></tr>
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124 <tr class="separator:af47b6b7c40f8f263dc28cc9a4e77b27c"><td class="memSeparator" colspan="2">&#160;</td></tr>
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125 </table>
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126 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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127 <div class="textblock"><p>Memory pool implementation. </p>
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128 <dl class="section author"><dt>Author</dt><dd>Mike Becker </dd>
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129 <dd>
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130 Olaf Wintermann </dd></dl>
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131 </div><h2 class="groupheader">Macro Definition Documentation</h2>
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132 <a id="a49f7bd1da5ac201d0cf54dc0f0d82dd2"></a>
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133 <h2 class="memtitle"><span class="permalink"><a href="#a49f7bd1da5ac201d0cf54dc0f0d82dd2">&#9670;&nbsp;</a></span>ucx_mempool_new_default</h2>
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134
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135 <div class="memitem">
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136 <div class="memproto">
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137 <table class="memname">
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138 <tr>
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139 <td class="memname">#define ucx_mempool_new_default</td>
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140 <td>(</td>
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141 <td class="paramname"></td><td>)</td>
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142 <td>&#160;&#160;&#160;<a class="el" href="mempool_8h.html#ad71cb8c3b6fdb30360376a8b372ef22a">ucx_mempool_new</a>(16)</td>
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143 </tr>
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144 </table>
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145 </div><div class="memdoc">
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146
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147 <p>Shorthand for a new default memory pool with a capacity of 16 elements. </p>
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148
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149 </div>
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150 </div>
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151 <h2 class="groupheader">Function Documentation</h2>
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152 <a id="a4b9142011824ae24f00fabe128417d69"></a>
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153 <h2 class="memtitle"><span class="permalink"><a href="#a4b9142011824ae24f00fabe128417d69">&#9670;&nbsp;</a></span>ucx_mempool_calloc()</h2>
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154
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155 <div class="memitem">
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156 <div class="memproto">
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157 <table class="memname">
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158 <tr>
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159 <td class="memname">void* ucx_mempool_calloc </td>
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160 <td>(</td>
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161 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td>
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162 <td class="paramname"><em>pool</em>, </td>
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163 </tr>
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164 <tr>
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165 <td class="paramkey"></td>
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166 <td></td>
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167 <td class="paramtype">size_t&#160;</td>
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168 <td class="paramname"><em>nelem</em>, </td>
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169 </tr>
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170 <tr>
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171 <td class="paramkey"></td>
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172 <td></td>
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173 <td class="paramtype">size_t&#160;</td>
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174 <td class="paramname"><em>elsize</em>&#160;</td>
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175 </tr>
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176 <tr>
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177 <td></td>
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178 <td>)</td>
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179 <td></td><td></td>
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180 </tr>
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181 </table>
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182 </div><div class="memdoc">
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183
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184 <p>Allocates a pooled memory array. </p>
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185 <p>The content of the allocated memory is set to zero.</p>
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186 <dl class="params"><dt>Parameters</dt><dd>
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187 <table class="params">
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188 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
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189 <tr><td class="paramname">nelem</td><td>amount of elements to allocate </td></tr>
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190 <tr><td class="paramname">elsize</td><td>amount of memory per element </td></tr>
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191 </table>
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192 </dd>
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193 </dl>
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194 <dl class="section return"><dt>Returns</dt><dd>a pointer to the allocated memory </dd></dl>
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195 <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>
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196
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197 </div>
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198 </div>
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199 <a id="aaf75b5016098723a9280531ccc3a6d77"></a>
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200 <h2 class="memtitle"><span class="permalink"><a href="#aaf75b5016098723a9280531ccc3a6d77">&#9670;&nbsp;</a></span>ucx_mempool_chcap()</h2>
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201
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202 <div class="memitem">
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203 <div class="memproto">
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204 <table class="memname">
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205 <tr>
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206 <td class="memname">int ucx_mempool_chcap </td>
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207 <td>(</td>
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208 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td>
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209 <td class="paramname"><em>pool</em>, </td>
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210 </tr>
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211 <tr>
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212 <td class="paramkey"></td>
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213 <td></td>
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214 <td class="paramtype">size_t&#160;</td>
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215 <td class="paramname"><em>newcap</em>&#160;</td>
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216 </tr>
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217 <tr>
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218 <td></td>
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219 <td>)</td>
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220 <td></td><td></td>
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221 </tr>
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222 </table>
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223 </div><div class="memdoc">
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224
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225 <p>Resizes a memory pool. </p>
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226 <p>This function will fail if the new capacity is not sufficient for the present data.</p>
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227 <dl class="params"><dt>Parameters</dt><dd>
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228 <table class="params">
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229 <tr><td class="paramname">pool</td><td>the pool to resize </td></tr>
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230 <tr><td class="paramname">newcap</td><td>the new capacity </td></tr>
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231 </table>
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232 </dd>
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233 </dl>
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234 <dl class="section return"><dt>Returns</dt><dd>zero on success or non-zero on failure </dd></dl>
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235
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236 </div>
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237 </div>
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238 <a id="af096378da7e9bfbed3088497cf4c15bf"></a>
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239 <h2 class="memtitle"><span class="permalink"><a href="#af096378da7e9bfbed3088497cf4c15bf">&#9670;&nbsp;</a></span>ucx_mempool_destroy()</h2>
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240
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241 <div class="memitem">
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242 <div class="memproto">
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243 <table class="memname">
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244 <tr>
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245 <td class="memname">void ucx_mempool_destroy </td>
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246 <td>(</td>
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247 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td>
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248 <td class="paramname"><em>pool</em></td><td>)</td>
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249 <td></td>
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250 </tr>
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251 </table>
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252 </div><div class="memdoc">
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253
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254 <p>Destroys a memory pool. </p>
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255 <p>For each element the destructor function (if any) is called and the element is freed.</p>
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256 <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>
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257 <dl class="params"><dt>Parameters</dt><dd>
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258 <table class="params">
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259 <tr><td class="paramname">pool</td><td>the mempool to destroy </td></tr>
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260 </table>
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261 </dd>
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262 </dl>
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263
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264 </div>
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265 </div>
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266 <a id="aefa26e3015f5aefadbfc74221bd246ac"></a>
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267 <h2 class="memtitle"><span class="permalink"><a href="#aefa26e3015f5aefadbfc74221bd246ac">&#9670;&nbsp;</a></span>ucx_mempool_free()</h2>
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268
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269 <div class="memitem">
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270 <div class="memproto">
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271 <table class="memname">
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272 <tr>
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273 <td class="memname">void ucx_mempool_free </td>
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274 <td>(</td>
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275 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td>
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276 <td class="paramname"><em>pool</em>, </td>
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277 </tr>
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278 <tr>
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279 <td class="paramkey"></td>
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280 <td></td>
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281 <td class="paramtype">void *&#160;</td>
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282 <td class="paramname"><em>ptr</em>&#160;</td>
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283 </tr>
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284 <tr>
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285 <td></td>
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286 <td>)</td>
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287 <td></td><td></td>
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288 </tr>
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289 </table>
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290 </div><div class="memdoc">
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291
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292 <p>Frees pooled memory. </p>
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293 <p>Before freeing the memory, the specified destructor function (if any) is called.</p>
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294 <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>
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295 <dl class="params"><dt>Parameters</dt><dd>
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296 <table class="params">
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297 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
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298 <tr><td class="paramname">ptr</td><td>a pointer to the memory that shall be freed </td></tr>
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299 </table>
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300 </dd>
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301 </dl>
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302 <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>
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303
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304 </div>
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305 </div>
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306 <a id="a2ae492b8f2878ccc9837ac213dced11e"></a>
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307 <h2 class="memtitle"><span class="permalink"><a href="#a2ae492b8f2878ccc9837ac213dced11e">&#9670;&nbsp;</a></span>ucx_mempool_malloc()</h2>
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308
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309 <div class="memitem">
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310 <div class="memproto">
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311 <table class="memname">
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312 <tr>
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313 <td class="memname">void* ucx_mempool_malloc </td>
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314 <td>(</td>
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315 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td>
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316 <td class="paramname"><em>pool</em>, </td>
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317 </tr>
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318 <tr>
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319 <td class="paramkey"></td>
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320 <td></td>
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321 <td class="paramtype">size_t&#160;</td>
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322 <td class="paramname"><em>n</em>&#160;</td>
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323 </tr>
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324 <tr>
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325 <td></td>
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326 <td>)</td>
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327 <td></td><td></td>
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328 </tr>
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329 </table>
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330 </div><div class="memdoc">
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331
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332 <p>Allocates pooled memory. </p>
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333 <dl class="params"><dt>Parameters</dt><dd>
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334 <table class="params">
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335 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
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336 <tr><td class="paramname">n</td><td>amount of memory to allocate </td></tr>
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337 </table>
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338 </dd>
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339 </dl>
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340 <dl class="section return"><dt>Returns</dt><dd>a pointer to the allocated memory </dd></dl>
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341 <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>
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342
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343 </div>
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344 </div>
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345 <a id="ad71cb8c3b6fdb30360376a8b372ef22a"></a>
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346 <h2 class="memtitle"><span class="permalink"><a href="#ad71cb8c3b6fdb30360376a8b372ef22a">&#9670;&nbsp;</a></span>ucx_mempool_new()</h2>
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347
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348 <div class="memitem">
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349 <div class="memproto">
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350 <table class="memname">
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351 <tr>
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352 <td class="memname"><a class="el" href="structUcxMempool.html">UcxMempool</a>* ucx_mempool_new </td>
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353 <td>(</td>
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354 <td class="paramtype">size_t&#160;</td>
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355 <td class="paramname"><em>n</em></td><td>)</td>
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356 <td></td>
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357 </tr>
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358 </table>
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359 </div><div class="memdoc">
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360
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361 <p>Creates a memory pool with the specified initial size. </p>
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362 <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>
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363 <dl class="params"><dt>Parameters</dt><dd>
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364 <table class="params">
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365 <tr><td class="paramname">n</td><td>initial pool size (should be a power of two, e.g. 16) </td></tr>
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366 </table>
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367 </dd>
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368 </dl>
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369 <dl class="section return"><dt>Returns</dt><dd>a pointer to the new memory pool </dd></dl>
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370 <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>
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371
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372 </div>
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373 </div>
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374 <a id="a660ef42520ed6737c2e77aae18e3a7a4"></a>
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375 <h2 class="memtitle"><span class="permalink"><a href="#a660ef42520ed6737c2e77aae18e3a7a4">&#9670;&nbsp;</a></span>ucx_mempool_realloc()</h2>
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376
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377 <div class="memitem">
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378 <div class="memproto">
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379 <table class="memname">
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380 <tr>
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381 <td class="memname">void* ucx_mempool_realloc </td>
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382 <td>(</td>
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383 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td>
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384 <td class="paramname"><em>pool</em>, </td>
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385 </tr>
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386 <tr>
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387 <td class="paramkey"></td>
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388 <td></td>
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389 <td class="paramtype">void *&#160;</td>
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390 <td class="paramname"><em>ptr</em>, </td>
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391 </tr>
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392 <tr>
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393 <td class="paramkey"></td>
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394 <td></td>
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395 <td class="paramtype">size_t&#160;</td>
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396 <td class="paramname"><em>n</em>&#160;</td>
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397 </tr>
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398 <tr>
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399 <td></td>
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400 <td>)</td>
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401 <td></td><td></td>
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402 </tr>
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403 </table>
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404 </div><div class="memdoc">
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405
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406 <p>Reallocates pooled memory. </p>
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407 <p>If the memory to be reallocated is not contained by the specified pool, the behavior is undefined.</p>
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408 <dl class="params"><dt>Parameters</dt><dd>
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409 <table class="params">
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410 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
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411 <tr><td class="paramname">ptr</td><td>a pointer to the memory that shall be reallocated </td></tr>
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412 <tr><td class="paramname">n</td><td>the new size of the memory </td></tr>
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413 </table>
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414 </dd>
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415 </dl>
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416 <dl class="section return"><dt>Returns</dt><dd>a pointer to the new location of the memory </dd></dl>
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417 <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>
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418
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419 </div>
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420 </div>
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421 <a id="af47b6b7c40f8f263dc28cc9a4e77b27c"></a>
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422 <h2 class="memtitle"><span class="permalink"><a href="#af47b6b7c40f8f263dc28cc9a4e77b27c">&#9670;&nbsp;</a></span>ucx_mempool_reg_destr()</h2>
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423
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424 <div class="memitem">
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425 <div class="memproto">
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426 <table class="memname">
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427 <tr>
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428 <td class="memname">void ucx_mempool_reg_destr </td>
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429 <td>(</td>
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430 <td class="paramtype"><a class="el" href="structUcxMempool.html">UcxMempool</a> *&#160;</td>
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431 <td class="paramname"><em>pool</em>, </td>
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432 </tr>
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433 <tr>
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434 <td class="paramkey"></td>
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435 <td></td>
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436 <td class="paramtype">void *&#160;</td>
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437 <td class="paramname"><em>ptr</em>, </td>
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438 </tr>
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439 <tr>
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440 <td class="paramkey"></td>
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441 <td></td>
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442 <td class="paramtype"><a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a>&#160;</td>
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443 <td class="paramname"><em>destr</em>&#160;</td>
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444 </tr>
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445 <tr>
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446 <td></td>
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447 <td>)</td>
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448 <td></td><td></td>
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449 </tr>
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450 </table>
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451 </div><div class="memdoc">
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452
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453 <p>Registers a destructor function for the specified (non-pooled) memory. </p>
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454 <p>This is useful, if you have memory that has not been allocated by a mempool, but shall be managed by a mempool.</p>
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455 <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>
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456 <dl class="params"><dt>Parameters</dt><dd>
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457 <table class="params">
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458 <tr><td class="paramname">pool</td><td>the memory pool </td></tr>
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459 <tr><td class="paramname">ptr</td><td>data the destructor is registered for </td></tr>
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460 <tr><td class="paramname">destr</td><td>a pointer to the destructor function </td></tr>
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461 </table>
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462 </dd>
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463 </dl>
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464
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465 </div>
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466 </div>
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467 <a id="adb788e7ec24cd7dbdea6381539c549f2"></a>
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468 <h2 class="memtitle"><span class="permalink"><a href="#adb788e7ec24cd7dbdea6381539c549f2">&#9670;&nbsp;</a></span>ucx_mempool_set_destr()</h2>
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469
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470 <div class="memitem">
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471 <div class="memproto">
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472 <table class="memname">
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473 <tr>
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474 <td class="memname">void ucx_mempool_set_destr </td>
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475 <td>(</td>
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476 <td class="paramtype">void *&#160;</td>
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477 <td class="paramname"><em>ptr</em>, </td>
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478 </tr>
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479 <tr>
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480 <td class="paramkey"></td>
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481 <td></td>
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482 <td class="paramtype"><a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a>&#160;</td>
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483 <td class="paramname"><em>func</em>&#160;</td>
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484 </tr>
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485 <tr>
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486 <td></td>
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487 <td>)</td>
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488 <td></td><td></td>
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489 </tr>
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490 </table>
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491 </div><div class="memdoc">
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492
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493 <p>Sets a destructor function for the specified memory. </p>
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494 <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>
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495 <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>
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496 <dl class="params"><dt>Parameters</dt><dd>
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497 <table class="params">
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498 <tr><td class="paramname">ptr</td><td>pooled memory </td></tr>
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499 <tr><td class="paramname">func</td><td>a pointer to the destructor function </td></tr>
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500 </table>
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501 </dd>
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502 </dl>
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503 <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>
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504 <dd>
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505 <a class="el" href="mempool_8h.html#af096378da7e9bfbed3088497cf4c15bf" title="Destroys a memory pool. ">ucx_mempool_destroy()</a> </dd></dl>
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506
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507 </div>
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508 </div>
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509 </div><!-- contents -->
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510 <!-- start footer part -->
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511 <hr class="footer"/><address class="footer"><small>
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512 Generated on Thu Dec 19 2019 19:58:24 for ucx by &#160;<a href="http://www.doxygen.org/index.html">
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513 <img class="footer" src="doxygen.png" alt="doxygen"/>
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514 </a> 1.8.13
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515 </small></address>
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516 </body>
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517 </html>

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