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 <span id="projectnumber">Version 2.1.0</span>
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<div id="projectbrief">Real-Time Operating System: API and RTX Reference Implementation</div>
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<a href="#nested-classes">Data Structures</a> |
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<a href="#func-members">Functions</a> </div>
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<div class="title">Memory Pool<div class="ingroups"><a class="el" href="group__CMSIS__RTOS.html">CMSIS-RTOS2 API</a></div></div> </div>
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<p>Manage thread-safe fixed-size blocks of dynamic memory.
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<table class="memberdecls">
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Data Structures</h2></td></tr>
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<tr class="memitem:structosMemoryPoolAttr__t"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#structosMemoryPoolAttr__t">osMemoryPoolAttr_t</a></td></tr>
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<tr class="memdesc:structosMemoryPoolAttr__t"><td class="mdescLeft"> </td><td class="mdescRight">Attributes structure for memory pool. <a href="group__CMSIS__RTOS__PoolMgmt.html#structosMemoryPoolAttr__t">More...</a><br/></td></tr>
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<tr class="separator:structosMemoryPoolAttr__t"><td class="memSeparator" colspan="2"> </td></tr>
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Typedefs</h2></td></tr>
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<tr class="memitem:ga2e44473caf338266f56800960294f960"><td class="memItemLeft" align="right" valign="top">typedef void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a></td></tr>
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<tr class="separator:ga2e44473caf338266f56800960294f960"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:ga497ced5d72dc5cd405c4c418516220dc"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </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>
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<tr class="memdesc:ga497ced5d72dc5cd405c4c418516220dc"><td class="mdescLeft"> </td><td class="mdescRight">Create and Initialize a Memory Pool object. <a href="#ga497ced5d72dc5cd405c4c418516220dc">More...</a><br/></td></tr>
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<tr class="separator:ga497ced5d72dc5cd405c4c418516220dc"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gab414a1e138205a55820acfa277c8f386"><td class="memItemLeft" align="right" valign="top">const char * </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>
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<tr class="memdesc:gab414a1e138205a55820acfa277c8f386"><td class="mdescLeft"> </td><td class="mdescRight">Get name of a Memory Pool object. <a href="#gab414a1e138205a55820acfa277c8f386">More...</a><br/></td></tr>
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<tr class="separator:gab414a1e138205a55820acfa277c8f386"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga8ead54e99ccb8f112356c88f99d38fbe"><td class="memItemLeft" align="right" valign="top">void * </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>
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<tr class="memdesc:ga8ead54e99ccb8f112356c88f99d38fbe"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a memory block from a Memory Pool. <a href="#ga8ead54e99ccb8f112356c88f99d38fbe">More...</a><br/></td></tr>
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<tr class="separator:ga8ead54e99ccb8f112356c88f99d38fbe"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gabb4f4560daa6d1f8c8789082ee186d16"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> </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>
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<tr class="memdesc:gabb4f4560daa6d1f8c8789082ee186d16"><td class="mdescLeft"> </td><td class="mdescRight">Return an allocated memory block back to a Memory Pool. <a href="#gabb4f4560daa6d1f8c8789082ee186d16">More...</a><br/></td></tr>
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<tr class="separator:gabb4f4560daa6d1f8c8789082ee186d16"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gad696e94bfbe28f0b6613f9303fdf6a37"><td class="memItemLeft" align="right" valign="top">uint32_t </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>
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<tr class="memdesc:gad696e94bfbe28f0b6613f9303fdf6a37"><td class="mdescLeft"> </td><td class="mdescRight">Get maximum number of memory blocks in a Memory Pool. <a href="#gad696e94bfbe28f0b6613f9303fdf6a37">More...</a><br/></td></tr>
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<tr class="separator:gad696e94bfbe28f0b6613f9303fdf6a37"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gab2bf059b7fa7679c3cccdaeec60b6c0e"><td class="memItemLeft" align="right" valign="top">uint32_t </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>
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<tr class="memdesc:gab2bf059b7fa7679c3cccdaeec60b6c0e"><td class="mdescLeft"> </td><td class="mdescRight">Get memory block size in a Memory Pool. <a href="#gab2bf059b7fa7679c3cccdaeec60b6c0e">More...</a><br/></td></tr>
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<tr class="separator:gab2bf059b7fa7679c3cccdaeec60b6c0e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga958a9449bff8c95ce213de98eef5739d"><td class="memItemLeft" align="right" valign="top">uint32_t </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>
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<tr class="memdesc:ga958a9449bff8c95ce213de98eef5739d"><td class="mdescLeft"> </td><td class="mdescRight">Get number of memory blocks used in a Memory Pool. <a href="#ga958a9449bff8c95ce213de98eef5739d">More...</a><br/></td></tr>
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<tr class="separator:ga958a9449bff8c95ce213de98eef5739d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga0394cffa9479a7994e3b03c79c1cb909"><td class="memItemLeft" align="right" valign="top">uint32_t </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>
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<tr class="memdesc:ga0394cffa9479a7994e3b03c79c1cb909"><td class="mdescLeft"> </td><td class="mdescRight">Get number of memory blocks available in a Memory Pool. <a href="#ga0394cffa9479a7994e3b03c79c1cb909">More...</a><br/></td></tr>
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<tr class="separator:ga0394cffa9479a7994e3b03c79c1cb909"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga8c39e7e5cd2b9eda907466808e59d62e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> </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>
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<tr class="memdesc:ga8c39e7e5cd2b9eda907466808e59d62e"><td class="mdescLeft"> </td><td class="mdescRight">Delete a Memory Pool object. <a href="#ga8c39e7e5cd2b9eda907466808e59d62e">More...</a><br/></td></tr>
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<tr class="separator:ga8c39e7e5cd2b9eda907466808e59d62e"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
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<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>
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<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>
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<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 <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd>
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<dd>
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Refer to <a class="el" href="config_rtx5.html#memPoolConfig">Memory Pool Configuration</a> for RTX5 configuration options. </dd></dl>
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<hr/><h2 class="groupheader">Data Structure Documentation</h2>
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<a name="structosMemoryPoolAttr__t" id="structosMemoryPoolAttr__t"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">struct osMemoryPoolAttr_t</td>
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</tr>
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</table>
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</div><div class="memdoc">
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<div class="textblock"></div><table class="fieldtable">
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<tr><th colspan="3">Data Fields</th></tr>
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<tr><td class="fieldtype">
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<a class="anchor" id="a8f8f80d37794cde9472343e4487ba3eb"></a>const char *</td>
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<td class="fieldname">
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name</td>
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<td class="fielddoc">
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name of the memory pool </td></tr>
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<tr><td class="fieldtype">
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<a class="anchor" id="a712a8f140170e6798f561e783265a279"></a>uint32_t</td>
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<td class="fieldname">
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attr_bits</td>
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<td class="fielddoc">
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attribute bits </td></tr>
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<tr><td class="fieldtype">
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<a class="anchor" id="a8c66c30fe3b487298af0e70eb93a197a"></a>void *</td>
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<td class="fieldname">
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cb_mem</td>
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<td class="fielddoc">
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memory for control block </td></tr>
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<tr><td class="fieldtype">
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<a class="anchor" id="a5c542fd75887b7be589b39a2062910de"></a>uint32_t</td>
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<td class="fieldname">
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cb_size</td>
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<td class="fielddoc">
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size of provided memory for control block </td></tr>
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<tr><td class="fieldtype">
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<a class="anchor" id="ac24b31114b3e60ed1e41bf9a166aad6d"></a>void *</td>
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<td class="fieldname">
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mp_mem</td>
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<td class="fielddoc">
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memory for data storage </td></tr>
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<tr><td class="fieldtype">
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<a class="anchor" id="a2e5d8aa8630f560597dd5e85c86f8a73"></a>uint32_t</td>
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<td class="fieldname">
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mp_size</td>
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<td class="fielddoc">
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size of provided memory for data storage </td></tr>
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</table>
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</div>
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</div>
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<h2 class="groupheader">Typedef Documentation</h2>
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<a class="anchor" id="ga2e44473caf338266f56800960294f960"></a>
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<td class="memname"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a></td>
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<p>Memory Pool ID identifies the memory pool. </p>
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</div>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> osMemoryPoolNew </td>
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<td>(</td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>block_count</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>block_size</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#structosMemoryPoolAttr__t">osMemoryPoolAttr_t</a> * </td>
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<td class="paramname"><em>attr</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</table>
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</div><div class="memdoc">
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">block_count</td><td>maximum number of memory blocks in memory pool. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">block_size</td><td>memory block size in bytes. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">attr</td><td>memory pool attributes; NULL: default values. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>memory pool ID for reference by other functions or NULL in case of error.</dd></dl>
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<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.</p>
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<p>The parameter <em>block_count</em> specifies the maximum number of memory blocks in the pool.</p>
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<p>The parameter <em>block_size</em> sets memory size in bytes.</p>
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<p>The parameter <em>attr</em> specifies additional memory pool attributes. Default attributes will be used if set to <span class="XML-Token">NULL</span>.</p>
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<dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">const char * osMemoryPoolGetName </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em></td><td>)</td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>name as NULL terminated string.</dd></dl>
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<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>
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<dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">void * osMemoryPoolAlloc </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>timeout</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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<tr><td class="paramdir">[in]</td><td class="paramname">timeout</td><td><a class="el" href="theory_of_operation.html#CMSIS_RTOS_TimeOutValue">Timeout Value</a> or 0 in case of no time-out. </td></tr>
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</table>
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</dd>
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<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>
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<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>
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<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 <b>BLOCKED</b> state. The parameter <a class="el" href="theory_of_operation.html#CMSIS_RTOS_TimeOutValue">timeout</a> can have the following values:</p>
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<ul>
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<li>when <em>timeout</em> is <span class="XML-Token">0</span>, the function returns instantly.</li>
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<li>when <em>timeout</em> is set to <b>osWaitForever</b> the function will wait for an infinite time until the memory is allocated.</li>
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<li>all other values specify a time in kernel ticks for a timeout.</li>
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</ul>
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<dl class="section note"><dt>Note</dt><dd>May be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a> if the parameter <em>timeout</em> is set to <span class="XML-Token">0</span>. </dd></dl>
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<td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osMemoryPoolFree </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>block</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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<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>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
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<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>.</p>
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<p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p>
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<ul>
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<li><em>osOK:</em> the memory has been freed.</li>
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<li><em>osErrorParameter:</em> parameter <em>mp_id</em> is <span class="XML-Token">NULL</span> or invalid.</li>
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<li><em>osErrorResource:</em> the memory pool specified by parameter <em>mp_id</em> is in an invalid memory pool state.</li>
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</ul>
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<dl class="section note"><dt>Note</dt><dd>This function may be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">uint32_t osMemoryPoolGetCapacity </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em></td><td>)</td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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</table>
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<dl class="section return"><dt>Returns</dt><dd>maximum number of memory blocks.</dd></dl>
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<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>
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<dl class="section note"><dt>Note</dt><dd>This function may be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">uint32_t osMemoryPoolGetBlockSize </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em></td><td>)</td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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</table>
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<dl class="section return"><dt>Returns</dt><dd>memory block size in bytes.</dd></dl>
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<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>
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<dl class="section note"><dt>Note</dt><dd>This function may be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">uint32_t osMemoryPoolGetCount </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em></td><td>)</td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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</table>
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<dl class="section return"><dt>Returns</dt><dd>number of memory blocks used.</dd></dl>
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<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>
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<dl class="section note"><dt>Note</dt><dd>This function may be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">uint32_t osMemoryPoolGetSpace </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em></td><td>)</td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>number of memory blocks available.</dd></dl>
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<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>
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<dl class="section note"><dt>Note</dt><dd>This function may be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osMemoryPoolDelete </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga2e44473caf338266f56800960294f960">osMemoryPoolId_t</a> </td>
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<td class="paramname"><em>mp_id</em></td><td>)</td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<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>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
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<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>
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<p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p>
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<ul>
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<li><em>osOK:</em> the memory pool object has been deleted.</li>
|
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<li><em>osErrorParameter:</em> parameter <em>mp_id</em> is <span class="XML-Token">NULL</span> or invalid.</li>
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<li><em>osErrorResource:</em> the memory pool specified by parameter <em>mp_id</em> is in an invalid memory pool state.</li>
|
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<li><em>osErrorISR:</em> <b>osMemoryPoolDelete</b> cannot be called from interrupt service routines.</li>
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</ul>
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<dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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