begriffs open source - cmsis/blob - main/RTOS2/html/group__CMSIS__RTOS__PoolMgmt.html

   1 <!-- HTML header for doxygen 1.9.6-->
   2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
   4 <head>
   5 <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
   6 <meta http-equiv="X-UA-Compatible" content="IE=11"/>
   7 <meta name="viewport" content="width=device-width, initial-scale=1"/>
   8 <title>CMSIS-RTOS2: Memory Pool</title>
   9 <link href="doxygen.css" rel="stylesheet" type="text/css"/>
  10 <link href="tabs.css" rel="stylesheet" type="text/css"/>
  11 <link href="extra_navtree.css" rel="stylesheet" type="text/css"/>
  12 <link href="extra_stylesheet.css" rel="stylesheet" type="text/css"/>
  13 <link href="extra_search.css" rel="stylesheet" type="text/css"/>
  14 <script type="text/javascript" src="jquery.js"></script>
  15 <script type="text/javascript" src="dynsections.js"></script>
  16 <script type="text/javascript" src="printComponentTabs.js"></script>
  17 <script type="text/javascript" src="footer.js"></script>
  18 <script type="text/javascript" src="navtree.js"></script>
  19 <link href="navtree.css" rel="stylesheet" type="text/css"/>
  20 <script type="text/javascript" src="resize.js"></script>
  21 <script type="text/javascript" src="navtreedata.js"></script>
  22 <script type="text/javascript" src="navtree.js"></script>
  23 <link href="search/search.css" rel="stylesheet" type="text/css"/>
  24 <script type="text/javascript" src="search/searchdata.js"></script>
  25 <script type="text/javascript" src="search/search.js"></script>
  26 <script type="text/javascript">
  27 /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
  28   $(document).ready(function() { init_search(); });
  29 /* @license-end */
  30 </script>
  31 <script type="text/javascript" src="darkmode_toggle.js"></script>
  32 <link href="extra_stylesheet.css" rel="stylesheet" type="text/css"/>
  33 <link href="extra_navtree.css" rel="stylesheet" type="text/css"/>
  34 <link href="extra_search.css" rel="stylesheet" type="text/css"/>
  35 <link href="version.css" rel="stylesheet" type="text/css" />
  36 <script type="text/javascript" src="../../version.js"></script>
  37 </head>
  38 <body>
  39 <div id="top"><!-- do not remove this div, it is closed by doxygen! -->
  40 <div id="titlearea">
  41 <table cellspacing="0" cellpadding="0">
  42  <tbody>
  43  <tr style="height: 55px;">
  44   <td id="projectlogo" style="padding: 1.5em;"><img alt="Logo" src="cmsis_logo_white_small.png"/></td>
  45   <td style="padding-left: 1em; padding-bottom: 1em;padding-top: 1em;">
  46    <div id="projectname">CMSIS-RTOS2
  47    &#160;<span id="projectnumber"><script type="text/javascript">
  48      <!--
  49      writeHeader.call(this);
  50      writeVersionDropdown.call(this, "CMSIS-RTOS2");
  51      //-->
  52     </script>
  53    </span>
  54    </div>
  55    <div id="projectbrief">Real-Time Operating System API</div>
  56   </td>
  57    <td>        <div id="MSearchBox" class="MSearchBoxInactive">
  58         <span class="left">
  59           <span id="MSearchSelect"                onmouseover="return searchBox.OnSearchSelectShow()"                onmouseout="return searchBox.OnSearchSelectHide()">&#160;</span>
  60           <input type="text" id="MSearchField" value="" placeholder="Search" accesskey="S"
  61                onfocus="searchBox.OnSearchFieldFocus(true)"
  62                onblur="searchBox.OnSearchFieldFocus(false)"
  63                onkeyup="searchBox.OnSearchFieldChange(event)"/>
  64           </span><span class="right">
  65             <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.svg" alt=""/></a>
  66           </span>
  67         </div>
  68 </td>
  69   <!--END !PROJECT_NAME-->
  70  </tr>
  71  </tbody>
  72 </table>
  73 </div>
  74 <!-- end header part -->
  75 <div id="CMSISnav" class="tabs1">
  76   <ul class="tablist">
  77     <script type="text/javascript">
  78       writeComponentTabs.call(this);
  79     </script>
  80   </ul>
  81 </div>
  82 <script type="text/javascript">
  83   writeSubComponentTabs.call(this);
  84 </script>
  85 <!-- Generated by Doxygen 1.9.6 -->
  86 <script type="text/javascript">
  87 /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
  88 var searchBox = new SearchBox("searchBox", "search/",'.html');
  89 /* @license-end */
  90 </script>
  91 </div><!-- top -->
  92 <div id="side-nav" class="ui-resizable side-nav-resizable">
  93   <div id="nav-tree">
  94     <div id="nav-tree-contents">
  95       <div id="nav-sync" class="sync"></div>
  96     </div>
  97   </div>
  98   <div id="splitbar" style="-moz-user-select:none;"
  99        class="ui-resizable-handle">
 100   </div>
 101 </div>
 102 <script type="text/javascript">
 103 /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
 104 $(document).ready(function(){initNavTree('group__CMSIS__RTOS__PoolMgmt.html',''); initResizable(); });
 105 /* @license-end */
 106 </script>
 107 <div id="doc-content">
 108 <!-- window showing the filter options -->
 109 <div id="MSearchSelectWindow"
 110      onmouseover="return searchBox.OnSearchSelectShow()"
 111      onmouseout="return searchBox.OnSearchSelectHide()"
 112      onkeydown="return searchBox.OnSearchSelectKey(event)">
 113 </div>
 114
 115 <!-- iframe showing the search results (closed by default) -->
 116 <div id="MSearchResultsWindow">
 117 <div id="MSearchResults">
 118 <div class="SRPage">
 119 <div id="SRIndex">
 120 <div id="SRResults"></div>
 121 <div class="SRStatus" id="Loading">Loading...</div>
 122 <div class="SRStatus" id="Searching">Searching...</div>
 123 <div class="SRStatus" id="NoMatches">No Matches</div>
 124 </div>
 125 </div>
 126 </div>
 127 </div>
 128
 129 <div class="header">
 130   <div class="summary">
 131 <a href="#nested-classes">Data Structures</a> &#124;
 132 <a href="#typedef-members">Typedefs</a> &#124;
 133 <a href="#func-members">Functions</a>  </div>
 134   <div class="headertitle"><div class="title">Memory Pool<div class="ingroups"><a class="el" href="group__CMSIS__RTOS.html">CMSIS-RTOS API v2</a></div></div></div>
 135 </div><!--header-->
 136 <div class="contents">
 137
 138 <p>Manage thread-safe fixed-size blocks of dynamic memory.
 139 <a href="#details">More...</a></p>
 140 <table class="memberdecls">
 141 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="nested-classes" name="nested-classes"></a>
 142 Data Structures</h2></td></tr>
 143 <tr class="memitem:structosMemoryPoolAttr__t"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#structosMemoryPoolAttr__t">osMemoryPoolAttr_t</a></td></tr>
 144 <tr class="memdesc:structosMemoryPoolAttr__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">Attributes structure for memory pool.  <a href="group__CMSIS__RTOS__PoolMgmt.html#structosMemoryPoolAttr__t">More...</a><br /></td></tr>
 145 <tr class="separator:structosMemoryPoolAttr__t"><td class="memSeparator" colspan="2">&#160;</td></tr>
 146 </table><table class="memberdecls">
 147 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>
 148 Typedefs</h2></td></tr>
 149 <tr class="memitem:ga2e44473caf338266f56800960294f960"><td class="memItemLeft" align="right" valign="top">typedef void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a></td></tr>
 150 <tr class="separator:ga2e44473caf338266f56800960294f960"><td class="memSeparator" colspan="2">&#160;</td></tr>
 151 </table><table class="memberdecls">
 152 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
 153 Functions</h2></td></tr>
 154 <tr class="memitem:ga497ced5d72dc5cd405c4c418516220dc"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a> (uint32_t block_count, uint32_t block_size, const <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#structosMemoryPoolAttr__t">osMemoryPoolAttr_t</a> *attr)</td></tr>
 155 <tr class="memdesc:ga497ced5d72dc5cd405c4c418516220dc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Create and Initialize a Memory Pool object.  <br /></td></tr>
 156 <tr class="separator:ga497ced5d72dc5cd405c4c418516220dc"><td class="memSeparator" colspan="2">&#160;</td></tr>
 157 <tr class="memitem:gab414a1e138205a55820acfa277c8f386"><td class="memItemLeft" align="right" valign="top">const char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gab414a1e138205a55820acfa277c8f386">osMemoryPoolGetName</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id)</td></tr>
 158 <tr class="memdesc:gab414a1e138205a55820acfa277c8f386"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get name of a Memory Pool object.  <br /></td></tr>
 159 <tr class="separator:gab414a1e138205a55820acfa277c8f386"><td class="memSeparator" colspan="2">&#160;</td></tr>
 160 <tr class="memitem:ga8ead54e99ccb8f112356c88f99d38fbe"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga8ead54e99ccb8f112356c88f99d38fbe">osMemoryPoolAlloc</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id, uint32_t timeout)</td></tr>
 161 <tr class="memdesc:ga8ead54e99ccb8f112356c88f99d38fbe"><td class="mdescLeft">&#160;</td><td class="mdescRight">Allocate a memory block from a Memory Pool.  <br /></td></tr>
 162 <tr class="separator:ga8ead54e99ccb8f112356c88f99d38fbe"><td class="memSeparator" colspan="2">&#160;</td></tr>
 163 <tr class="memitem:gabb4f4560daa6d1f8c8789082ee186d16"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gabb4f4560daa6d1f8c8789082ee186d16">osMemoryPoolFree</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id, void *block)</td></tr>
 164 <tr class="memdesc:gabb4f4560daa6d1f8c8789082ee186d16"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return an allocated memory block back to a Memory Pool.  <br /></td></tr>
 165 <tr class="separator:gabb4f4560daa6d1f8c8789082ee186d16"><td class="memSeparator" colspan="2">&#160;</td></tr>
 166 <tr class="memitem:gad696e94bfbe28f0b6613f9303fdf6a37"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gad696e94bfbe28f0b6613f9303fdf6a37">osMemoryPoolGetCapacity</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id)</td></tr>
 167 <tr class="memdesc:gad696e94bfbe28f0b6613f9303fdf6a37"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get maximum number of memory blocks in a Memory Pool.  <br /></td></tr>
 168 <tr class="separator:gad696e94bfbe28f0b6613f9303fdf6a37"><td class="memSeparator" colspan="2">&#160;</td></tr>
 169 <tr class="memitem:gab2bf059b7fa7679c3cccdaeec60b6c0e"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gab2bf059b7fa7679c3cccdaeec60b6c0e">osMemoryPoolGetBlockSize</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id)</td></tr>
 170 <tr class="memdesc:gab2bf059b7fa7679c3cccdaeec60b6c0e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get memory block size in a Memory Pool.  <br /></td></tr>
 171 <tr class="separator:gab2bf059b7fa7679c3cccdaeec60b6c0e"><td class="memSeparator" colspan="2">&#160;</td></tr>
 172 <tr class="memitem:ga958a9449bff8c95ce213de98eef5739d"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga958a9449bff8c95ce213de98eef5739d">osMemoryPoolGetCount</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id)</td></tr>
 173 <tr class="memdesc:ga958a9449bff8c95ce213de98eef5739d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get number of memory blocks used in a Memory Pool.  <br /></td></tr>
 174 <tr class="separator:ga958a9449bff8c95ce213de98eef5739d"><td class="memSeparator" colspan="2">&#160;</td></tr>
 175 <tr class="memitem:ga0394cffa9479a7994e3b03c79c1cb909"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga0394cffa9479a7994e3b03c79c1cb909">osMemoryPoolGetSpace</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id)</td></tr>
 176 <tr class="memdesc:ga0394cffa9479a7994e3b03c79c1cb909"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get number of memory blocks available in a Memory Pool.  <br /></td></tr>
 177 <tr class="separator:ga0394cffa9479a7994e3b03c79c1cb909"><td class="memSeparator" colspan="2">&#160;</td></tr>
 178 <tr class="memitem:ga8c39e7e5cd2b9eda907466808e59d62e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga8c39e7e5cd2b9eda907466808e59d62e">osMemoryPoolDelete</a> (<a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mp_id)</td></tr>
 179 <tr class="memdesc:ga8c39e7e5cd2b9eda907466808e59d62e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Delete a Memory Pool object.  <br /></td></tr>
 180 <tr class="separator:ga8c39e7e5cd2b9eda907466808e59d62e"><td class="memSeparator" colspan="2">&#160;</td></tr>
 181 </table>
 182 <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
 183 <p><b>Memory</b> <b>Pools</b> are fixed-size blocks of memory that are thread-safe. They operate much faster than the dynamically allocated heap and do not suffer from fragmentation. Being thread-safe, they can be accessed from threads and ISRs alike.</p>
 184 <p>A Memory Pool can be seen as a linked list of available (unused) memory blocks of fixed and equal size. Allocating memory from a pool (using <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga8ead54e99ccb8f112356c88f99d38fbe">osMemoryPoolAlloc</a>) simply unchains a block from the list and hands over control to the user. Freeing memory to the pool (using <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gabb4f4560daa6d1f8c8789082ee186d16">osMemoryPoolFree</a>) simply rechains the block into the list.</p>
 185 <div class="image">
 186 <img src="mempool.png" alt=""/>
 187 <div class="caption">
 188 CMSIS-RTOS Memory Pools</div></div>
 189 <dl class="section note"><dt>Note</dt><dd>One must not write to freed block. It is up to the implementation to reuse the memory of unused blocks for internal control data, i.e. linked list pointers.</dd></dl>
 190 <p><b>Shared</b> <b>memory</b> is one of the basic models to exchange information between threads. Using memory pools for exchanging data, you can share more complex objects between threads if compared to a <a class="el" href="group__CMSIS__RTOS__Message.html">Message Queue</a>. Memory pool management functions are used to define and manage such fixed-sized memory pools.</p>
 191 <dl class="section note"><dt>Note</dt><dd>The functions <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga8ead54e99ccb8f112356c88f99d38fbe">osMemoryPoolAlloc</a>, <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gabb4f4560daa6d1f8c8789082ee186d16">osMemoryPoolFree</a>, <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gad696e94bfbe28f0b6613f9303fdf6a37">osMemoryPoolGetCapacity</a>, <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gab2bf059b7fa7679c3cccdaeec60b6c0e">osMemoryPoolGetBlockSize</a>, <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga958a9449bff8c95ce213de98eef5739d">osMemoryPoolGetCount</a>, <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga0394cffa9479a7994e3b03c79c1cb909">osMemoryPoolGetSpace</a> can be called from Interrupt Service Routines. </dd>
 192 <dd>
 193 Refer to memPoolConfig for RTX5 configuration options. </dd></dl>
 194 <hr/><h2 class="groupheader">Data Structure Documentation</h2>
 195 <a name="structosMemoryPoolAttr__t" id="structosMemoryPoolAttr__t"></a>
 196 <h2 class="memtitle"><span class="permalink"><a href="#structosMemoryPoolAttr__t">&#9670;&#160;</a></span>osMemoryPoolAttr_t</h2>
 197
 198 <div class="memitem">
 199 <div class="memproto">
 200       <table class="memname">
 201         <tr>
 202           <td class="memname">struct osMemoryPoolAttr_t</td>
 203         </tr>
 204       </table>
 205 </div><div class="memdoc">
 206 <div class="textblock"><p>Attributes to configure a memory pool.</p>
 207 <p>Refer to <a class="el" href="group__CMSIS__RTOS__MemoryMgmt.html">Memory Management</a> for details about usage of</p><ul>
 208 <li><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#a1e100dc33d403841ed3c344e3397868e" title="memory for control block">osMemoryPoolAttr_t::cb_mem</a></li>
 209 <li><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#aa55a4335d12dc2785dc00fdc292d1159" title="size of provided memory for control block">osMemoryPoolAttr_t::cb_size</a></li>
 210 <li><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#a5799465cca9c71c5587ceb0986f5b06a" title="memory for data storage">osMemoryPoolAttr_t::mp_mem</a></li>
 211 <li><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#a66c26015c0ac8e88a4ad907c120aee4f" title="size of provided memory for data storage">osMemoryPoolAttr_t::mp_size</a> </li>
 212 </ul>
 213 </div><table class="fieldtable">
 214 <tr><th colspan="3">Data Fields</th></tr>
 215 <tr><td class="fieldtype">
 216 <a id="ab74e6bf80237ddc4109968cedc58c151" name="ab74e6bf80237ddc4109968cedc58c151"></a>const char *</td>
 217 <td class="fieldname">
 218 name</td>
 219 <td class="fielddoc">
 220 name of the memory pool <p>Pointer to a string with a human readable name of the memory pool object.<br  />
 221 Default: <span class="XML-Token">NULL</span>. </p>
 222 </td></tr>
 223 <tr><td class="fieldtype">
 224 <a id="a6e93b49cb79c12f768d72580c7731f30" name="a6e93b49cb79c12f768d72580c7731f30"></a>uint32_t</td>
 225 <td class="fieldname">
 226 attr_bits</td>
 227 <td class="fielddoc">
 228 attribute bits <p>Reserved for future use (set to '0').<br  />
 229 Default: <span class="XML-Token">0</span>. </p>
 230 </td></tr>
 231 <tr><td class="fieldtype">
 232 <a id="a1e100dc33d403841ed3c344e3397868e" name="a1e100dc33d403841ed3c344e3397868e"></a>void *</td>
 233 <td class="fieldname">
 234 cb_mem</td>
 235 <td class="fielddoc">
 236 memory for control block <p>Pointer to a memory location for the memory pool control block object. This can optionally be used for custom memory management systems.<br  />
 237 Default: <span class="XML-Token">NULL</span> (uses kernel memory management). </p>
 238 </td></tr>
 239 <tr><td class="fieldtype">
 240 <a id="aa55a4335d12dc2785dc00fdc292d1159" name="aa55a4335d12dc2785dc00fdc292d1159"></a>uint32_t</td>
 241 <td class="fieldname">
 242 cb_size</td>
 243 <td class="fielddoc">
 244 size of provided memory for control block <p>The size of the memory block passed with <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#a1e100dc33d403841ed3c344e3397868e">cb_mem</a>. Must be the size of a memory pool control block object or larger. </p>
 245 </td></tr>
 246 <tr><td class="fieldtype">
 247 <a id="a5799465cca9c71c5587ceb0986f5b06a" name="a5799465cca9c71c5587ceb0986f5b06a"></a>void *</td>
 248 <td class="fieldname">
 249 mp_mem</td>
 250 <td class="fielddoc">
 251 memory for data storage <p>Pointer to a memory location for the data of the memory pool object.<br  />
 252 Default: <span class="XML-Token">NULL</span>. </p>
 253 </td></tr>
 254 <tr><td class="fieldtype">
 255 <a id="a66c26015c0ac8e88a4ad907c120aee4f" name="a66c26015c0ac8e88a4ad907c120aee4f"></a>uint32_t</td>
 256 <td class="fieldname">
 257 mp_size</td>
 258 <td class="fielddoc">
 259 size of provided memory for data storage <p>The size of the memory passed with <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#a5799465cca9c71c5587ceb0986f5b06a">mp_mem</a>. </p>
 260 </td></tr>
 261 </table>
 262
 263 </div>
 264 </div>
 265 <h2 class="groupheader">Typedef Documentation</h2>
 266 <a id="ga2e44473caf338266f56800960294f960" name="ga2e44473caf338266f56800960294f960"></a>
 267 <h2 class="memtitle"><span class="permalink"><a href="#ga2e44473caf338266f56800960294f960">&#9670;&#160;</a></span>osMemoryPoolId_t</h2>
 268
 269 <div class="memitem">
 270 <div class="memproto">
 271       <table class="memname">
 272         <tr>
 273           <td class="memname"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a></td>
 274         </tr>
 275       </table>
 276 </div><div class="memdoc">
 277 <p>Memory Pool ID identifies the memory pool.</p>
 278 <p>Returned by:</p><ul>
 279 <li><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a> </li>
 280 </ul>
 281
 282 </div>
 283 </div>
 284 <h2 class="groupheader">Function Documentation</h2>
 285 <a id="ga497ced5d72dc5cd405c4c418516220dc" name="ga497ced5d72dc5cd405c4c418516220dc"></a>
 286 <h2 class="memtitle"><span class="permalink"><a href="#ga497ced5d72dc5cd405c4c418516220dc">&#9670;&#160;</a></span>osMemoryPoolNew()</h2>
 287
 288 <div class="memitem">
 289 <div class="memproto">
 290       <table class="memname">
 291         <tr>
 292           <td class="memname"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> osMemoryPoolNew </td>
 293           <td>(</td>
 294           <td class="paramtype">uint32_t&#160;</td>
 295           <td class="paramname"><em>block_count</em>, </td>
 296         </tr>
 297         <tr>
 298           <td class="paramkey"></td>
 299           <td></td>
 300           <td class="paramtype">uint32_t&#160;</td>
 301           <td class="paramname"><em>block_size</em>, </td>
 302         </tr>
 303         <tr>
 304           <td class="paramkey"></td>
 305           <td></td>
 306           <td class="paramtype">const <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#structosMemoryPoolAttr__t">osMemoryPoolAttr_t</a> *&#160;</td>
 307           <td class="paramname"><em>attr</em>&#160;</td>
 308         </tr>
 309         <tr>
 310           <td></td>
 311           <td>)</td>
 312           <td></td><td></td>
 313         </tr>
 314       </table>
 315 </div><div class="memdoc">
 316 <dl class="params"><dt>Parameters</dt><dd>
 317   <table class="params">
 318     <tr><td class="paramdir">[in]</td><td class="paramname">block_count</td><td>maximum number of memory blocks in memory pool. </td></tr>
 319     <tr><td class="paramdir">[in]</td><td class="paramname">block_size</td><td>memory block size in bytes. </td></tr>
 320     <tr><td class="paramdir">[in]</td><td class="paramname">attr</td><td>memory pool attributes; NULL: default values. </td></tr>
 321   </table>
 322   </dd>
 323 </dl>
 324 <dl class="section return"><dt>Returns</dt><dd>memory pool ID for reference by other functions or NULL in case of error.</dd></dl>
 325 <p>The function <b>osMemoryPoolNew</b> creates and initializes a memory pool object and returns the pointer to the memory pool object identifier or <span class="XML-Token">NULL</span> in case of an error. It can be safely called before the RTOS is started (call to <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a>), but not before it is initialized (call to <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a>).</p>
 326 <p>The total amount of memory needed is at least <code>block_count * block_size</code>. Memory from the pool can only be allocated/freed in fixed portions of <code>block_size</code>.</p>
 327 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 328 <p><b>Code</b> <b>Example</b> </p><div class="fragment"><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="cmsis__os2_8h.html">cmsis_os2.h</a>&quot;</span>                          <span class="comment">// CMSIS RTOS header file</span></div>
 329 <div class="line"> </div>
 330 <div class="line"><span class="comment">/*----------------------------------------------------------------------------</span></div>
 331 <div class="line"><span class="comment"> *      Memory Pool creation &amp; usage</span></div>
 332 <div class="line"><span class="comment"> *---------------------------------------------------------------------------*/</span></div>
 333 <div class="line"> </div>
 334 <div class="line"><span class="preprocessor">#define MEMPOOL_OBJECTS 16                      </span><span class="comment">// number of Memory Pool Objects</span></div>
 335 <div class="line"> </div>
 336 <div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{                                <span class="comment">// object data type</span></div>
 337 <div class="line">  uint8_t Buf[32];</div>
 338 <div class="line">  uint8_t Idx;</div>
 339 <div class="line">} MEM_BLOCK_t;</div>
 340 <div class="line"> </div>
 341 <div class="line"><a class="code hl_typedef" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> mpid_MemPool;                  <span class="comment">// memory pool id</span></div>
 342 <div class="line"> </div>
 343 <div class="line"><a class="code hl_typedef" href="group__CMSIS__RTOS__ThreadMgmt.html#gaa6c32fe2a3e0a2e01f212d55b02e51c7">osThreadId_t</a> tid_Thread_MemPool;                <span class="comment">// thread id</span></div>
 344 <div class="line"> </div>
 345 <div class="line"><span class="keywordtype">void</span> Thread_MemPool (<span class="keywordtype">void</span> *argument);           <span class="comment">// thread function</span></div>
 346 <div class="line"> </div>
 347 <div class="line"><span class="keywordtype">int</span> Init_MemPool (<span class="keywordtype">void</span>) {</div>
 348 <div class="line"> </div>
 349 <div class="line">  mpid_MemPool = <a class="code hl_function" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>(MEMPOOL_OBJECTS, <span class="keyword">sizeof</span>(MEM_BLOCK_t), NULL);</div>
 350 <div class="line">  <span class="keywordflow">if</span> (mpid_MemPool == NULL) {</div>
 351 <div class="line">    ; <span class="comment">// MemPool object not created, handle failure</span></div>
 352 <div class="line">  }</div>
 353 <div class="line"> </div>
 354 <div class="line">  tid_Thread_MemPool = <a class="code hl_function" href="group__CMSIS__RTOS__ThreadMgmt.html#ga48d68b8666d99d28fa646ee1d2182b8f">osThreadNew</a>(Thread_MemPool, NULL, NULL);</div>
 355 <div class="line">  <span class="keywordflow">if</span> (tid_Thread_MemPool == NULL) {</div>
 356 <div class="line">    <span class="keywordflow">return</span>(-1);</div>
 357 <div class="line">  }</div>
 358 <div class="line"> </div>
 359 <div class="line">  <span class="keywordflow">return</span>(0);</div>
 360 <div class="line">}</div>
 361 <div class="line"> </div>
 362 <div class="line"><span class="keywordtype">void</span> Thread_MemPool (<span class="keywordtype">void</span> *argument) {</div>
 363 <div class="line">  MEM_BLOCK_t *pMem;</div>
 364 <div class="line">  <a class="code hl_enumeration" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> status;</div>
 365 <div class="line"> </div>
 366 <div class="line">  <span class="keywordflow">while</span> (1) {</div>
 367 <div class="line">    ; <span class="comment">// Insert thread code here...</span></div>
 368 <div class="line"> </div>
 369 <div class="line">    pMem = (MEM_BLOCK_t *)<a class="code hl_function" href="group__CMSIS__RTOS__PoolMgmt.html#ga8ead54e99ccb8f112356c88f99d38fbe">osMemoryPoolAlloc</a>(mpid_MemPool, 0U);  <span class="comment">// get Mem Block</span></div>
 370 <div class="line">    <span class="keywordflow">if</span> (pMem != NULL) {                                         <span class="comment">// Mem Block was available</span></div>
 371 <div class="line">      pMem-&gt;Buf[0] = 0x55U;                                     <span class="comment">// do some work...</span></div>
 372 <div class="line">      pMem-&gt;Idx    = 0U;</div>
 373 <div class="line"> </div>
 374 <div class="line">      status = <a class="code hl_function" href="group__CMSIS__RTOS__PoolMgmt.html#gabb4f4560daa6d1f8c8789082ee186d16">osMemoryPoolFree</a>(mpid_MemPool, pMem);            <span class="comment">// free mem block</span></div>
 375 <div class="line">      <span class="keywordflow">switch</span> (status)  {</div>
 376 <div class="line">        <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813ea9e1c9e2550bb4de8969a935acffc968f">osOK</a>:</div>
 377 <div class="line">          <span class="keywordflow">break</span>;</div>
 378 <div class="line">        <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813eac24adca6a5d072c9f01c32178ba0d109">osErrorParameter</a>:</div>
 379 <div class="line">          <span class="keywordflow">break</span>;</div>
 380 <div class="line">        <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813eaf1fac0240218e51eb30a13da2f8aae81">osErrorNoMemory</a>:</div>
 381 <div class="line">          <span class="keywordflow">break</span>;</div>
 382 <div class="line">        <span class="keywordflow">default</span>:</div>
 383 <div class="line">          <span class="keywordflow">break</span>;</div>
 384 <div class="line">      }</div>
 385 <div class="line">    }</div>
 386 <div class="line"> </div>
 387 <div class="line">    <a class="code hl_function" href="group__CMSIS__RTOS__ThreadMgmt.html#gad01c7ec26535b1de6b018bb9466720e2">osThreadYield</a>();                                            <span class="comment">// suspend thread</span></div>
 388 <div class="line">  }</div>
 389 <div class="line">}</div>
 390 <div class="ttc" id="acmsis__os2_8h_html"><div class="ttname"><a href="cmsis__os2_8h.html">cmsis_os2.h</a></div></div>
 391 <div class="ttc" id="acmsis__os2_8h_html_ga6c0dbe6069e4e7f47bb4cd32ae2b813ea9e1c9e2550bb4de8969a935acffc968f"><div class="ttname"><a href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813ea9e1c9e2550bb4de8969a935acffc968f">osOK</a></div><div class="ttdeci">@ osOK</div><div class="ttdoc">Operation completed successfully.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:247</div></div>
 392 <div class="ttc" id="acmsis__os2_8h_html_ga6c0dbe6069e4e7f47bb4cd32ae2b813eac24adca6a5d072c9f01c32178ba0d109"><div class="ttname"><a href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813eac24adca6a5d072c9f01c32178ba0d109">osErrorParameter</a></div><div class="ttdeci">@ osErrorParameter</div><div class="ttdoc">Parameter error.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:251</div></div>
 393 <div class="ttc" id="acmsis__os2_8h_html_ga6c0dbe6069e4e7f47bb4cd32ae2b813eaf1fac0240218e51eb30a13da2f8aae81"><div class="ttname"><a href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813eaf1fac0240218e51eb30a13da2f8aae81">osErrorNoMemory</a></div><div class="ttdeci">@ osErrorNoMemory</div><div class="ttdoc">System is out of memory: it was impossible to allocate or reserve memory for the operation.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:252</div></div>
 394 <div class="ttc" id="agroup__CMSIS__RTOS__Definitions_html_ga6c0dbe6069e4e7f47bb4cd32ae2b813e"><div class="ttname"><a href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a></div><div class="ttdeci">osStatus_t</div><div class="ttdoc">Status code values returned by CMSIS-RTOS functions.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:246</div></div>
 395 <div class="ttc" id="agroup__CMSIS__RTOS__PoolMgmt_html_ga2e44473caf338266f56800960294f960"><div class="ttname"><a href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a></div><div class="ttdeci">void * osMemoryPoolId_t</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:275</div></div>
 396 <div class="ttc" id="agroup__CMSIS__RTOS__PoolMgmt_html_ga497ced5d72dc5cd405c4c418516220dc"><div class="ttname"><a href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a></div><div class="ttdeci">osMemoryPoolId_t osMemoryPoolNew(uint32_t block_count, uint32_t block_size, const osMemoryPoolAttr_t *attr)</div><div class="ttdoc">Create and Initialize a Memory Pool object.</div></div>
 397 <div class="ttc" id="agroup__CMSIS__RTOS__PoolMgmt_html_ga8ead54e99ccb8f112356c88f99d38fbe"><div class="ttname"><a href="group__CMSIS__RTOS__PoolMgmt.html#ga8ead54e99ccb8f112356c88f99d38fbe">osMemoryPoolAlloc</a></div><div class="ttdeci">void * osMemoryPoolAlloc(osMemoryPoolId_t mp_id, uint32_t timeout)</div><div class="ttdoc">Allocate a memory block from a Memory Pool.</div></div>
 398 <div class="ttc" id="agroup__CMSIS__RTOS__PoolMgmt_html_gabb4f4560daa6d1f8c8789082ee186d16"><div class="ttname"><a href="group__CMSIS__RTOS__PoolMgmt.html#gabb4f4560daa6d1f8c8789082ee186d16">osMemoryPoolFree</a></div><div class="ttdeci">osStatus_t osMemoryPoolFree(osMemoryPoolId_t mp_id, void *block)</div><div class="ttdoc">Return an allocated memory block back to a Memory Pool.</div></div>
 399 <div class="ttc" id="agroup__CMSIS__RTOS__ThreadMgmt_html_ga48d68b8666d99d28fa646ee1d2182b8f"><div class="ttname"><a href="group__CMSIS__RTOS__ThreadMgmt.html#ga48d68b8666d99d28fa646ee1d2182b8f">osThreadNew</a></div><div class="ttdeci">osThreadId_t osThreadNew(osThreadFunc_t func, void *argument, const osThreadAttr_t *attr)</div><div class="ttdoc">Create a thread and add it to Active Threads.</div></div>
 400 <div class="ttc" id="agroup__CMSIS__RTOS__ThreadMgmt_html_gaa6c32fe2a3e0a2e01f212d55b02e51c7"><div class="ttname"><a href="group__CMSIS__RTOS__ThreadMgmt.html#gaa6c32fe2a3e0a2e01f212d55b02e51c7">osThreadId_t</a></div><div class="ttdeci">void * osThreadId_t</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:260</div></div>
 401 <div class="ttc" id="agroup__CMSIS__RTOS__ThreadMgmt_html_gad01c7ec26535b1de6b018bb9466720e2"><div class="ttname"><a href="group__CMSIS__RTOS__ThreadMgmt.html#gad01c7ec26535b1de6b018bb9466720e2">osThreadYield</a></div><div class="ttdeci">osStatus_t osThreadYield(void)</div><div class="ttdoc">Pass control to next thread that is in state READY.</div></div>
 402 </div><!-- fragment -->
 403 </div>
 404 </div>
 405 <a id="gab414a1e138205a55820acfa277c8f386" name="gab414a1e138205a55820acfa277c8f386"></a>
 406 <h2 class="memtitle"><span class="permalink"><a href="#gab414a1e138205a55820acfa277c8f386">&#9670;&#160;</a></span>osMemoryPoolGetName()</h2>
 407
 408 <div class="memitem">
 409 <div class="memproto">
 410       <table class="memname">
 411         <tr>
 412           <td class="memname">const char * osMemoryPoolGetName </td>
 413           <td>(</td>
 414           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 415           <td class="paramname"><em>mp_id</em></td><td>)</td>
 416           <td></td>
 417         </tr>
 418       </table>
 419 </div><div class="memdoc">
 420 <dl class="params"><dt>Parameters</dt><dd>
 421   <table class="params">
 422     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 423   </table>
 424   </dd>
 425 </dl>
 426 <dl class="section return"><dt>Returns</dt><dd>name as null-terminated string.</dd></dl>
 427 <p>The function <b>osMemoryPoolGetName</b> returns the pointer to the name string of the memory pool identified by parameter <em>mp_id</em> or <span class="XML-Token">NULL</span> in case of an error.</p>
 428 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines. </dd></dl>
 429
 430 </div>
 431 </div>
 432 <a id="ga8ead54e99ccb8f112356c88f99d38fbe" name="ga8ead54e99ccb8f112356c88f99d38fbe"></a>
 433 <h2 class="memtitle"><span class="permalink"><a href="#ga8ead54e99ccb8f112356c88f99d38fbe">&#9670;&#160;</a></span>osMemoryPoolAlloc()</h2>
 434
 435 <div class="memitem">
 436 <div class="memproto">
 437       <table class="memname">
 438         <tr>
 439           <td class="memname">void * osMemoryPoolAlloc </td>
 440           <td>(</td>
 441           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 442           <td class="paramname"><em>mp_id</em>, </td>
 443         </tr>
 444         <tr>
 445           <td class="paramkey"></td>
 446           <td></td>
 447           <td class="paramtype">uint32_t&#160;</td>
 448           <td class="paramname"><em>timeout</em>&#160;</td>
 449         </tr>
 450         <tr>
 451           <td></td>
 452           <td>)</td>
 453           <td></td><td></td>
 454         </tr>
 455       </table>
 456 </div><div class="memdoc">
 457 <dl class="params"><dt>Parameters</dt><dd>
 458   <table class="params">
 459     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 460     <tr><td class="paramdir">[in]</td><td class="paramname">timeout</td><td>CMSIS_RTOS_TimeOutValue or 0 in case of no time-out. </td></tr>
 461   </table>
 462   </dd>
 463 </dl>
 464 <dl class="section return"><dt>Returns</dt><dd>address of the allocated memory block or NULL in case of no memory is available.</dd></dl>
 465 <p>The blocking function <b>osMemoryPoolAlloc</b> allocates the memory pool parameter <em>mp_id</em> and returns a pointer to the address of the allocated memory or <span class="XML-Token">0</span> in case of an error.</p>
 466 <p>The parameter <em>timeout</em> specifies how long the system waits to allocate the memory. While the system waits, the thread that is calling this function is put into the <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ThreadStates">BLOCKED</a> state. The thread will become <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ThreadStates">READY</a> as soon as at least one block of memory gets available.</p>
 467 <p>The parameter timeout can have the following values:</p><ul>
 468 <li>when <em>timeout</em> is <span class="XML-Token">0</span>, the function returns instantly (i.e. try semantics).</li>
 469 <li>when <em>timeout</em> is set to <b>osWaitForever</b> the function will wait for an infinite time until the memory is allocated (i.e. wait semantics).</li>
 470 <li>all other values specify a time in kernel ticks for a timeout (i.e. timed-wait semantics).</li>
 471 </ul>
 472 <p>The result is the pointer to the memory block allocated, or NULL if no memory is available.</p>
 473 <dl class="section note"><dt>Note</dt><dd>It is in the responsibility of the user to respect the block size, i.e. not access memory beyond the blocks limit.</dd>
 474 <dd>
 475 May be called from Interrupt Service Routines if the parameter <em>timeout</em> is set to <span class="XML-Token">0</span>.</dd></dl>
 476 <p><b>Code</b> <b>Example</b> </p>
 477 <p>Refer to <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </p>
 478
 479 </div>
 480 </div>
 481 <a id="gabb4f4560daa6d1f8c8789082ee186d16" name="gabb4f4560daa6d1f8c8789082ee186d16"></a>
 482 <h2 class="memtitle"><span class="permalink"><a href="#gabb4f4560daa6d1f8c8789082ee186d16">&#9670;&#160;</a></span>osMemoryPoolFree()</h2>
 483
 484 <div class="memitem">
 485 <div class="memproto">
 486       <table class="memname">
 487         <tr>
 488           <td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osMemoryPoolFree </td>
 489           <td>(</td>
 490           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 491           <td class="paramname"><em>mp_id</em>, </td>
 492         </tr>
 493         <tr>
 494           <td class="paramkey"></td>
 495           <td></td>
 496           <td class="paramtype">void *&#160;</td>
 497           <td class="paramname"><em>block</em>&#160;</td>
 498         </tr>
 499         <tr>
 500           <td></td>
 501           <td>)</td>
 502           <td></td><td></td>
 503         </tr>
 504       </table>
 505 </div><div class="memdoc">
 506 <dl class="params"><dt>Parameters</dt><dd>
 507   <table class="params">
 508     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 509     <tr><td class="paramdir">[in]</td><td class="paramname">block</td><td>address of the allocated memory block to be returned to the memory pool. </td></tr>
 510   </table>
 511   </dd>
 512 </dl>
 513 <dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
 514 <p>The function <b>osMemoryPoolFree</b> frees the memory pool block specified by the parameter <em>block</em> in the memory pool object specified by the parameter <em>mp_id</em>. The memory block is put back to the list of available blocks.</p>
 515 <p>If another thread is waiting for memory to become available the thread is put to <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ThreadStates">READY</a> state.</p>
 516 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 517 <li><em>osOK:</em> the memory has been freed.</li>
 518 <li><em>osErrorParameter:</em> parameter <em>mp_id</em> is <span class="XML-Token">NULL</span> or invalid, <em>block</em> points to invalid memory.</li>
 519 <li><em>osErrorResource:</em> the memory pool is in an invalid state.</li>
 520 <li><em>osErrorSafetyClass:</em> the calling thread safety class is lower than the safety class of the specified memory pool.</li>
 521 </ul>
 522 <dl class="section note"><dt>Note</dt><dd><b>osMemoryPoolFree</b> may perform certain checks on the <em>block</em> pointer given. But using <b>osMemoryPoolFree</b> with a pointer other than one received from <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga8ead54e99ccb8f112356c88f99d38fbe">osMemoryPoolAlloc</a> has <b>UNPREDICTED</b> behaviour.</dd>
 523 <dd>
 524 This function may be called from Interrupt Service Routines.</dd></dl>
 525 <p><b>Code</b> <b>Example</b> </p>
 526 <p>Refer to <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </p>
 527
 528 </div>
 529 </div>
 530 <a id="gad696e94bfbe28f0b6613f9303fdf6a37" name="gad696e94bfbe28f0b6613f9303fdf6a37"></a>
 531 <h2 class="memtitle"><span class="permalink"><a href="#gad696e94bfbe28f0b6613f9303fdf6a37">&#9670;&#160;</a></span>osMemoryPoolGetCapacity()</h2>
 532
 533 <div class="memitem">
 534 <div class="memproto">
 535       <table class="memname">
 536         <tr>
 537           <td class="memname">uint32_t osMemoryPoolGetCapacity </td>
 538           <td>(</td>
 539           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 540           <td class="paramname"><em>mp_id</em></td><td>)</td>
 541           <td></td>
 542         </tr>
 543       </table>
 544 </div><div class="memdoc">
 545 <dl class="params"><dt>Parameters</dt><dd>
 546   <table class="params">
 547     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 548   </table>
 549   </dd>
 550 </dl>
 551 <dl class="section return"><dt>Returns</dt><dd>maximum number of memory blocks.</dd></dl>
 552 <p>The function <b>osMemoryPoolGetCapacity</b> returns the maximum number of memory blocks in the memory pool object specified by parameter <em>mp_id</em> or <span class="XML-Token">0</span> in case of an error.</p>
 553 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines. </dd></dl>
 554
 555 </div>
 556 </div>
 557 <a id="gab2bf059b7fa7679c3cccdaeec60b6c0e" name="gab2bf059b7fa7679c3cccdaeec60b6c0e"></a>
 558 <h2 class="memtitle"><span class="permalink"><a href="#gab2bf059b7fa7679c3cccdaeec60b6c0e">&#9670;&#160;</a></span>osMemoryPoolGetBlockSize()</h2>
 559
 560 <div class="memitem">
 561 <div class="memproto">
 562       <table class="memname">
 563         <tr>
 564           <td class="memname">uint32_t osMemoryPoolGetBlockSize </td>
 565           <td>(</td>
 566           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 567           <td class="paramname"><em>mp_id</em></td><td>)</td>
 568           <td></td>
 569         </tr>
 570       </table>
 571 </div><div class="memdoc">
 572 <dl class="params"><dt>Parameters</dt><dd>
 573   <table class="params">
 574     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 575   </table>
 576   </dd>
 577 </dl>
 578 <dl class="section return"><dt>Returns</dt><dd>memory block size in bytes.</dd></dl>
 579 <p>The function <b>osMemoryPoolGetBlockSize</b> returns the memory block size in bytes in the memory pool object specified by parameter <em>mp_id</em> or <span class="XML-Token">0</span> in case of an error.</p>
 580 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines. </dd></dl>
 581
 582 </div>
 583 </div>
 584 <a id="ga958a9449bff8c95ce213de98eef5739d" name="ga958a9449bff8c95ce213de98eef5739d"></a>
 585 <h2 class="memtitle"><span class="permalink"><a href="#ga958a9449bff8c95ce213de98eef5739d">&#9670;&#160;</a></span>osMemoryPoolGetCount()</h2>
 586
 587 <div class="memitem">
 588 <div class="memproto">
 589       <table class="memname">
 590         <tr>
 591           <td class="memname">uint32_t osMemoryPoolGetCount </td>
 592           <td>(</td>
 593           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 594           <td class="paramname"><em>mp_id</em></td><td>)</td>
 595           <td></td>
 596         </tr>
 597       </table>
 598 </div><div class="memdoc">
 599 <dl class="params"><dt>Parameters</dt><dd>
 600   <table class="params">
 601     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 602   </table>
 603   </dd>
 604 </dl>
 605 <dl class="section return"><dt>Returns</dt><dd>number of memory blocks used.</dd></dl>
 606 <p>The function <b>osMemoryPoolGetCount</b> returns the number of memory blocks used in the memory pool object specified by parameter <em>mp_id</em> or <span class="XML-Token">0</span> in case of an error.</p>
 607 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines. </dd></dl>
 608
 609 </div>
 610 </div>
 611 <a id="ga0394cffa9479a7994e3b03c79c1cb909" name="ga0394cffa9479a7994e3b03c79c1cb909"></a>
 612 <h2 class="memtitle"><span class="permalink"><a href="#ga0394cffa9479a7994e3b03c79c1cb909">&#9670;&#160;</a></span>osMemoryPoolGetSpace()</h2>
 613
 614 <div class="memitem">
 615 <div class="memproto">
 616       <table class="memname">
 617         <tr>
 618           <td class="memname">uint32_t osMemoryPoolGetSpace </td>
 619           <td>(</td>
 620           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 621           <td class="paramname"><em>mp_id</em></td><td>)</td>
 622           <td></td>
 623         </tr>
 624       </table>
 625 </div><div class="memdoc">
 626 <dl class="params"><dt>Parameters</dt><dd>
 627   <table class="params">
 628     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 629   </table>
 630   </dd>
 631 </dl>
 632 <dl class="section return"><dt>Returns</dt><dd>number of memory blocks available.</dd></dl>
 633 <p>The function <b>osMemoryPoolGetSpace</b> returns the number of memory blocks available in the memory pool object specified by parameter <em>mp_id</em> or <span class="XML-Token">0</span> in case of an error.</p>
 634 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines. </dd></dl>
 635
 636 </div>
 637 </div>
 638 <a id="ga8c39e7e5cd2b9eda907466808e59d62e" name="ga8c39e7e5cd2b9eda907466808e59d62e"></a>
 639 <h2 class="memtitle"><span class="permalink"><a href="#ga8c39e7e5cd2b9eda907466808e59d62e">&#9670;&#160;</a></span>osMemoryPoolDelete()</h2>
 640
 641 <div class="memitem">
 642 <div class="memproto">
 643       <table class="memname">
 644         <tr>
 645           <td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osMemoryPoolDelete </td>
 646           <td>(</td>
 647           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a>&#160;</td>
 648           <td class="paramname"><em>mp_id</em></td><td>)</td>
 649           <td></td>
 650         </tr>
 651       </table>
 652 </div><div class="memdoc">
 653 <dl class="params"><dt>Parameters</dt><dd>
 654   <table class="params">
 655     <tr><td class="paramdir">[in]</td><td class="paramname">mp_id</td><td>memory pool ID obtained by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>. </td></tr>
 656   </table>
 657   </dd>
 658 </dl>
 659 <dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
 660 <p>The function <b>osMemoryPoolDelete</b> deletes a memory pool object specified by parameter <em>mp_id</em>. It releases internal memory obtained for memory pool handling. After this call, the <em>mp_id</em> is no longer valid and cannot be used. The memory pool may be created again using the function <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga497ced5d72dc5cd405c4c418516220dc">osMemoryPoolNew</a>.</p>
 661 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 662 <li><em>osOK:</em> the memory pool object has been deleted.</li>
 663 <li><em>osErrorParameter:</em> parameter <em>mp_id</em> is <span class="XML-Token">NULL</span> or invalid.</li>
 664 <li><em>osErrorResource:</em> the memory pool is in an invalid state.</li>
 665 <li><em>osErrorISR:</em> <b>osMemoryPoolDelete</b> cannot be called from interrupt service routines.</li>
 666 <li><em>osErrorSafetyClass:</em> the calling thread safety class is lower than the safety class of the specified memory pool.</li>
 667 </ul>
 668 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines. </dd></dl>
 669
 670 </div>
 671 </div>
 672 </div><!-- contents -->
 673 </div><!-- doc-content -->
 674 <!-- start footer part -->
 675 <div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
 676   <ul>
 677     <li class="footer">
 678       <script type="text/javascript">
 679         <!--
 680         writeFooter.call(this);
 681         //-->
 682       </script>
 683     </li>
 684   </ul>
 685 </div>
 686 </body>
 687 </html>