diff options
Diffstat (limited to 'docs/RTOS/html/group__CMSIS__RTOS__PoolMgmt.html')
| -rw-r--r-- | docs/RTOS/html/group__CMSIS__RTOS__PoolMgmt.html | 495 |
1 files changed, 495 insertions, 0 deletions
diff --git a/docs/RTOS/html/group__CMSIS__RTOS__PoolMgmt.html b/docs/RTOS/html/group__CMSIS__RTOS__PoolMgmt.html new file mode 100644 index 0000000..91e0af7 --- /dev/null +++ b/docs/RTOS/html/group__CMSIS__RTOS__PoolMgmt.html @@ -0,0 +1,495 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head> +<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> +<meta http-equiv="X-UA-Compatible" content="IE=9"/> +<title>Memory Pool</title> +<title>CMSIS-RTOS: Memory Pool</title> +<link href="tabs.css" rel="stylesheet" type="text/css"/> +<link href="cmsis.css" rel="stylesheet" type="text/css" /> +<script type="text/javascript" src="jquery.js"></script> +<script type="text/javascript" src="dynsections.js"></script> +<script type="text/javascript" src="printComponentTabs.js"></script> +<link href="navtree.css" rel="stylesheet" type="text/css"/> +<script type="text/javascript" src="resize.js"></script> +<script type="text/javascript" src="navtree.js"></script> +<script type="text/javascript"> + $(document).ready(initResizable); + $(window).load(resizeHeight); +</script> +<link href="search/search.css" rel="stylesheet" type="text/css"/> +<script type="text/javascript" src="search/search.js"></script> +<script type="text/javascript"> + $(document).ready(function() { searchBox.OnSelectItem(0); }); +</script> +</head> +<body> +<div id="top"><!-- do not remove this div, it is closed by doxygen! --> +<div id="titlearea"> +<table cellspacing="0" cellpadding="0"> + <tbody> + <tr style="height: 46px;"> + <td id="projectlogo"><img alt="Logo" src="CMSIS_Logo_Final.png"/></td> + <td style="padding-left: 0.5em;"> + <div id="projectname">CMSIS-RTOS +  <span id="projectnumber">Version 1.03</span> + </div> + <div id="projectbrief">Real-Time Operating System: API and RTX Reference Implementation.</div> + </td> + </tr> + </tbody> +</table> +</div> +<!-- end header part --> +<div id="CMSISnav" class="tabs1"> + <ul class="tablist"> + <script type="text/javascript"> + <!-- + writeComponentTabs.call(this); + //--> + </script> + </ul> +</div> +<!-- Generated by Doxygen 1.8.6 --> +<script type="text/javascript"> +var searchBox = new SearchBox("searchBox", "search",false,'Search'); +</script> + <div id="navrow1" class="tabs"> + <ul class="tablist"> + <li><a href="index.html"><span>Main Page</span></a></li> + <li><a href="pages.html"><span>Usage and Description</span></a></li> + <li><a href="modules.html"><span>Reference</span></a></li> + <li> + <div id="MSearchBox" class="MSearchBoxInactive"> + <span class="left"> + <img id="MSearchSelect" src="search/mag_sel.png" + onmouseover="return searchBox.OnSearchSelectShow()" + onmouseout="return searchBox.OnSearchSelectHide()" + alt=""/> + <input type="text" id="MSearchField" value="Search" accesskey="S" + onfocus="searchBox.OnSearchFieldFocus(true)" + onblur="searchBox.OnSearchFieldFocus(false)" + onkeyup="searchBox.OnSearchFieldChange(event)"/> + </span><span class="right"> + <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> + </span> + </div> + </li> + </ul> + </div> +</div><!-- top --> +<div id="side-nav" class="ui-resizable side-nav-resizable"> + <div id="nav-tree"> + <div id="nav-tree-contents"> + <div id="nav-sync" class="sync"></div> + </div> + </div> + <div id="splitbar" style="-moz-user-select:none;" + class="ui-resizable-handle"> + </div> +</div> +<script type="text/javascript"> +$(document).ready(function(){initNavTree('group__CMSIS__RTOS__PoolMgmt.html','');}); +</script> +<div id="doc-content"> +<!-- window showing the filter options --> +<div id="MSearchSelectWindow" + onmouseover="return searchBox.OnSearchSelectShow()" + onmouseout="return searchBox.OnSearchSelectHide()" + onkeydown="return searchBox.OnSearchSelectKey(event)"> +<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Macros</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Pages</a></div> + +<!-- iframe showing the search results (closed by default) --> +<div id="MSearchResultsWindow"> +<iframe src="javascript:void(0)" frameborder="0" + name="MSearchResults" id="MSearchResults"> +</iframe> +</div> + +<div class="header"> + <div class="summary"> +<a href="#define-members">Macros</a> | +<a href="#func-members">Functions</a> </div> + <div class="headertitle"> +<div class="title">Memory Pool<div class="ingroups"><a class="el" href="group__CMSIS__RTOS__InterThread.html">Inter-Thread Communication and Resource Sharing</a></div></div> </div> +</div><!--header--> +<div class="contents"> + +<p>Manage thread-safe fixed-size blocks of dynamic memory. +<a href="#details">More...</a></p> +<table class="memberdecls"> +<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a> +Macros</h2></td></tr> +<tr class="memitem:gadd84b683001de327894851b428587caa"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gadd84b683001de327894851b428587caa">osFeature_Pool</a>   1</td></tr> +<tr class="memdesc:gadd84b683001de327894851b428587caa"><td class="mdescLeft"> </td><td class="mdescRight">Memory Pools: 1=available, 0=not available. <a href="#gadd84b683001de327894851b428587caa">More...</a><br/></td></tr> +<tr class="separator:gadd84b683001de327894851b428587caa"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga87b471d4fe2d5dbd0040708edd52771b"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga87b471d4fe2d5dbd0040708edd52771b">osPoolDef</a>(name, no, type)</td></tr> +<tr class="memdesc:ga87b471d4fe2d5dbd0040708edd52771b"><td class="mdescLeft"> </td><td class="mdescRight">Define a Memory Pool. <a href="#ga87b471d4fe2d5dbd0040708edd52771b">More...</a><br/></td></tr> +<tr class="separator:ga87b471d4fe2d5dbd0040708edd52771b"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga5f0b204a82327533d420210125c90697"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a>(name)   &os_pool_def_##name</td></tr> +<tr class="memdesc:ga5f0b204a82327533d420210125c90697"><td class="mdescLeft"> </td><td class="mdescRight">Access a Memory Pool definition. <a href="#ga5f0b204a82327533d420210125c90697">More...</a><br/></td></tr> +<tr class="separator:ga5f0b204a82327533d420210125c90697"><td class="memSeparator" colspan="2"> </td></tr> +</table><table class="memberdecls"> +<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> +Functions</h2></td></tr> +<tr class="memitem:ga34af5c4f4ab38f4138ea7f1f9ece3a1a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a> (const <a class="el" href="cmsis__os_8h.html#structosPoolDef__t">osPoolDef_t</a> *pool_def)</td></tr> +<tr class="memdesc:ga34af5c4f4ab38f4138ea7f1f9ece3a1a"><td class="mdescLeft"> </td><td class="mdescRight">Create and Initialize a memory pool. <a href="#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">More...</a><br/></td></tr> +<tr class="separator:ga34af5c4f4ab38f4138ea7f1f9ece3a1a"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:gaa0b2994f1a866c19e0d11e6e0d44f543"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gaa0b2994f1a866c19e0d11e6e0d44f543">osPoolAlloc</a> (<a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> pool_id)</td></tr> +<tr class="memdesc:gaa0b2994f1a866c19e0d11e6e0d44f543"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a memory block from a memory pool. <a href="#gaa0b2994f1a866c19e0d11e6e0d44f543">More...</a><br/></td></tr> +<tr class="separator:gaa0b2994f1a866c19e0d11e6e0d44f543"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga9f129fcad4730fbd1048ad4fa262f36a"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga9f129fcad4730fbd1048ad4fa262f36a">osPoolCAlloc</a> (<a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> pool_id)</td></tr> +<tr class="memdesc:ga9f129fcad4730fbd1048ad4fa262f36a"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a memory block from a memory pool and set memory block to zero. <a href="#ga9f129fcad4730fbd1048ad4fa262f36a">More...</a><br/></td></tr> +<tr class="separator:ga9f129fcad4730fbd1048ad4fa262f36a"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga4a861e9c469c9d0daf5721bf174f8e54"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Status.html#gae2e091fefc4c767117727bd5aba4d99e">osStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga4a861e9c469c9d0daf5721bf174f8e54">osPoolFree</a> (<a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> pool_id, void *block)</td></tr> +<tr class="memdesc:ga4a861e9c469c9d0daf5721bf174f8e54"><td class="mdescLeft"> </td><td class="mdescRight">Return an allocated memory block back to a specific memory pool. <a href="#ga4a861e9c469c9d0daf5721bf174f8e54">More...</a><br/></td></tr> +<tr class="separator:ga4a861e9c469c9d0daf5721bf174f8e54"><td class="memSeparator" colspan="2"> </td></tr> +</table> +<a name="details" id="details"></a><h2 class="groupheader">Description</h2> +<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> +<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> +<h2>Working with Memory Pools </h2> +<p>Follow these steps to create and use a memory pool:</p> +<ol type="1"> +<li>Declare a data structure that combines a number of elements: <div class="fragment"><div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div> +<div class="line"> uint32_t length;</div> +<div class="line"> uint32_t width;</div> +<div class="line"> uint32_t height;</div> +<div class="line"> uint32_t weight;</div> +<div class="line">} properties_t;</div> +</div><!-- fragment --></li> +<li>Declare a memory pool of these objects as a block of memory: <div class="fragment"><div class="line"><a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga87b471d4fe2d5dbd0040708edd52771b">osPoolDef</a> (object_pool, 10, properties_t); <span class="comment">// Declare memory pool</span></div> +<div class="line"><a class="code" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> (object_pool_id); <span class="comment">// Memory pool ID</span></div> +</div><!-- fragment --></li> +<li>Then, create the memory pool in a thread: <div class="fragment"><div class="line">object_pool_id = <a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a>(<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a>(object_pool));</div> +</div><!-- fragment --></li> +<li>Allocate the pool within a thread and fill it with data: <div class="fragment"><div class="line">properties_t *object_data;</div> +<div class="line"> object_data = (properties_t *) <a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#gaa0b2994f1a866c19e0d11e6e0d44f543">osPoolAlloc</a>(object_pool_id);</div> +<div class="line"> </div> +<div class="line">object_data->length = 100;</div> +<div class="line">object_data->width = 10;</div> +<div class="line">object_data->height = 23;</div> +<div class="line">object_data->weight = 1000;</div> +</div><!-- fragment --> </li> +</ol> +<h2 class="groupheader">Macro Definition Documentation</h2> +<a class="anchor" id="gadd84b683001de327894851b428587caa"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define osFeature_Pool   1</td> + </tr> + </table> +</div><div class="memdoc"> +<p>A CMSIS-RTOS implementation may support fixed-size memory pools.</p> +<ul> +<li>When <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gadd84b683001de327894851b428587caa">osFeature_Pool</a> is 1 memory pools are supported.</li> +<li>When <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#gadd84b683001de327894851b428587caa">osFeature_Pool</a> is 0 no memory pools are supported.</li> +</ul> +<p><a class="el" href="rtxImplementation.html">CMSIS-RTOS RTX</a> Setting: <b>osFeature_Pool</b> is 1 </p> + +</div> +</div> +<a class="anchor" id="ga5f0b204a82327533d420210125c90697"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define osPool</td> + <td>(</td> + <td class="paramtype"> </td> + <td class="paramname">name</td><td>)</td> + <td>   &os_pool_def_##name</td> + </tr> + </table> +</div><div class="memdoc"> +<p>Access a memory pool for the functions <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a>.</p> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramname">name</td><td>name of the memory pool </td></tr> + </table> + </dd> +</dl> +<dl class="section note"><dt>Note</dt><dd>CAN BE CHANGED: The parameter to <b>osPool</b> shall be consistent but the macro body is implementation specific in every CMSIS-RTOS. </dd></dl> + +</div> +</div> +<a class="anchor" id="ga87b471d4fe2d5dbd0040708edd52771b"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define osPoolDef</td> + <td>(</td> + <td class="paramtype"> </td> + <td class="paramname">name, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"> </td> + <td class="paramname">no, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"> </td> + <td class="paramname">type </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<p>Define a memory pool that is referenced by <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a>.</p> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramname">name</td><td>name of the memory pool. </td></tr> + <tr><td class="paramname">no</td><td>maximum number of blocks (objects) in the memory pool. </td></tr> + <tr><td class="paramname">type</td><td>data type of a single block (object). </td></tr> + </table> + </dd> +</dl> +<dl class="section note"><dt>Note</dt><dd>CAN BE CHANGED: The parameter to <b>osPoolDef</b> shall be consistent but the macro body is implementation specific in every CMSIS-RTOS. </dd></dl> + +</div> +</div> +<h2 class="groupheader">Function Documentation</h2> +<a class="anchor" id="gaa0b2994f1a866c19e0d11e6e0d44f543"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void * osPoolAlloc </td> + <td>(</td> + <td class="paramtype"><a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> </td> + <td class="paramname"><em>pool_id</em></td><td>)</td> + <td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">pool_id</td><td>memory pool ID obtain referenced with <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a>. </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>address of the allocated memory block or NULL in case of no memory available. </dd></dl> +<dl class="section note"><dt>Note</dt><dd>MUST REMAIN UNCHANGED: <b>osPoolAlloc</b> shall be consistent in every CMSIS-RTOS.</dd></dl> +<p>Allocate a memory block from the memory pool.</p> +<dl class="section note"><dt>Note</dt><dd><a class="el" href="functionOverview.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a> can call this function.</dd></dl> +<p><b>Code Example</b> </p> +<div class="fragment"><div class="line"><span class="preprocessor">#include "<a class="code" href="cmsis__os_8h.html">cmsis_os.h</a>"</span></div> +<div class="line"> </div> +<div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div> +<div class="line"> uint8_t Buf[32];</div> +<div class="line"> uint8_t Idx;</div> +<div class="line">} MEM_BLOCK;</div> +<div class="line"> </div> +<div class="line"><a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga87b471d4fe2d5dbd0040708edd52771b">osPoolDef</a> (MemPool, 8, MEM_BLOCK);</div> +<div class="line"> </div> +<div class="line"><span class="keywordtype">void</span> AlocMemoryPoolBlock (<span class="keywordtype">void</span>) {</div> +<div class="line"> <a class="code" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> MemPool_Id;</div> +<div class="line"> MEM_BLOCK *addr;</div> +<div class="line"> </div> +<div class="line"> MemPool_Id = <a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a> (<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a> (MemPool));</div> +<div class="line"> <span class="keywordflow">if</span> (MemPool_Id != NULL) {</div> +<div class="line"> :</div> +<div class="line"> <span class="comment">// allocate a memory block</span></div> +<div class="line"> addr = (MEM_BLOCK *)<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#gaa0b2994f1a866c19e0d11e6e0d44f543">osPoolAlloc</a> (MemPool_Id);</div> +<div class="line"> </div> +<div class="line"> <span class="keywordflow">if</span> (addr != NULL) {</div> +<div class="line"> <span class="comment">// memory block was allocated</span></div> +<div class="line"> :</div> +<div class="line"> }</div> +<div class="line"> }</div> +<div class="line">}</div> +</div><!-- fragment --> +</div> +</div> +<a class="anchor" id="ga9f129fcad4730fbd1048ad4fa262f36a"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void * osPoolCAlloc </td> + <td>(</td> + <td class="paramtype"><a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> </td> + <td class="paramname"><em>pool_id</em></td><td>)</td> + <td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">pool_id</td><td>memory pool ID obtain referenced with <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a>. </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>address of the allocated memory block or NULL in case of no memory available. </dd></dl> +<dl class="section note"><dt>Note</dt><dd>MUST REMAIN UNCHANGED: <b>osPoolCAlloc</b> shall be consistent in every CMSIS-RTOS.</dd></dl> +<p>Allocate a memory block from the memory pool. The block is initialized to zero.</p> +<dl class="section note"><dt>Note</dt><dd><a class="el" href="functionOverview.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a> can call this function.</dd></dl> +<p><b>Code Example</b> </p> +<div class="fragment"><div class="line"><span class="preprocessor">#include "<a class="code" href="cmsis__os_8h.html">cmsis_os.h</a>"</span></div> +<div class="line"> </div> +<div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div> +<div class="line"> uint8_t Buf[32];</div> +<div class="line"> uint8_t Idx;</div> +<div class="line">} MEM_BLOCK;</div> +<div class="line"> </div> +<div class="line"><a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga87b471d4fe2d5dbd0040708edd52771b">osPoolDef</a> (MemPool, 8, MEM_BLOCK);</div> +<div class="line"> </div> +<div class="line"><span class="keywordtype">void</span> CAlocMemoryPoolBlock (<span class="keywordtype">void</span>) {</div> +<div class="line"> <a class="code" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> MemPool_Id;</div> +<div class="line"> MEM_BLOCK *addr;</div> +<div class="line"> </div> +<div class="line"> MemPool_Id = <a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a> (<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a> (MemPool));</div> +<div class="line"> <span class="keywordflow">if</span> (MemPool_Id != NULL) {</div> +<div class="line"> :</div> +<div class="line"> <span class="comment">// allocate a memory block</span></div> +<div class="line"> addr = (MEM_BLOCK *)<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga9f129fcad4730fbd1048ad4fa262f36a">osPoolCAlloc</a> (MemPool_Id);</div> +<div class="line"> </div> +<div class="line"> <span class="keywordflow">if</span> (addr != NULL) {</div> +<div class="line"> <span class="comment">// memory block was allocated</span></div> +<div class="line"> :</div> +<div class="line"> }</div> +<div class="line"> }</div> +<div class="line">}</div> +</div><!-- fragment --> +</div> +</div> +<a class="anchor" id="ga34af5c4f4ab38f4138ea7f1f9ece3a1a"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname"><a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> osPoolCreate </td> + <td>(</td> + <td class="paramtype">const <a class="el" href="cmsis__os_8h.html#structosPoolDef__t">osPoolDef_t</a> * </td> + <td class="paramname"><em>pool_def</em></td><td>)</td> + <td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">pool_def</td><td>memory pool definition referenced with <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a>. </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>memory pool ID for reference by other functions or NULL in case of error. </dd></dl> +<dl class="section note"><dt>Note</dt><dd>MUST REMAIN UNCHANGED: <b>osPoolCreate</b> shall be consistent in every CMSIS-RTOS.</dd></dl> +<p>Create and initialize a memory pool.</p> +<dl class="section note"><dt>Note</dt><dd>Cannot be called from <a class="el" href="functionOverview.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>.</dd></dl> +<p><b>Code Example</b> </p> +<div class="fragment"><div class="line"><span class="preprocessor">#include "<a class="code" href="cmsis__os_8h.html">cmsis_os.h</a>"</span></div> +<div class="line"> </div> +<div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div> +<div class="line"> uint8_t Buf[32];</div> +<div class="line"> uint8_t Idx;</div> +<div class="line">} MEM_BLOCK;</div> +<div class="line"> </div> +<div class="line"><a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga87b471d4fe2d5dbd0040708edd52771b">osPoolDef</a> (MemPool, 8, MEM_BLOCK);</div> +<div class="line"> </div> +<div class="line"><span class="keywordtype">void</span> CreateMemoryPool (<span class="keywordtype">void</span>) {</div> +<div class="line"><a class="code" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> MemPool_Id;</div> +<div class="line"> </div> +<div class="line"> MemPool_Id = <a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a> (<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a> (MemPool));</div> +<div class="line"> <span class="keywordflow">if</span> (MemPool_Id != NULL) {</div> +<div class="line"> <span class="comment">// memory pool created</span></div> +<div class="line"> }</div> +<div class="line">}</div> +</div><!-- fragment --> +</div> +</div> +<a class="anchor" id="ga4a861e9c469c9d0daf5721bf174f8e54"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname"><a class="el" href="group__CMSIS__RTOS__Status.html#gae2e091fefc4c767117727bd5aba4d99e">osStatus</a> osPoolFree </td> + <td>(</td> + <td class="paramtype"><a class="el" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> </td> + <td class="paramname"><em>pool_id</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">void * </td> + <td class="paramname"><em>block</em> </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">pool_id</td><td>memory pool ID obtain referenced with <a class="el" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a>. </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">block</td><td>address of the allocated memory block that is returned to the memory pool. </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function. </dd></dl> +<dl class="section note"><dt>Note</dt><dd>MUST REMAIN UNCHANGED: <b>osPoolFree</b> shall be consistent in every CMSIS-RTOS.</dd></dl> +<p>Return a memory block to a memory pool.</p> +<p><b><a class="el" href="group__CMSIS__RTOS__Status.html">Status and Error Codes</a></b><br/> +</p> +<ul> +<li><em>osOK:</em> the memory block is released.</li> +<li><em>osErrorValue:</em> <em>block</em> does not belong to the memory pool.</li> +<li><em>osErrorParameter:</em> a parameter is invalid or outside of a permitted range.</li> +</ul> +<dl class="section note"><dt>Note</dt><dd><a class="el" href="functionOverview.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a> can call this function.</dd></dl> +<p><b>Code Example</b> </p> +<div class="fragment"><div class="line"><span class="preprocessor">#include "<a class="code" href="cmsis__os_8h.html">cmsis_os.h</a>"</span></div> +<div class="line"> </div> +<div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div> +<div class="line"> uint8_t Buf[32];</div> +<div class="line"> uint8_t Idx;</div> +<div class="line">} MEM_BLOCK;</div> +<div class="line"> </div> +<div class="line"><a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga87b471d4fe2d5dbd0040708edd52771b">osPoolDef</a> (MemPool, 8, MEM_BLOCK);</div> +<div class="line"> </div> +<div class="line"><span class="keywordtype">void</span> CAlocMemoryPoolBlock (<span class="keywordtype">void</span>) {</div> +<div class="line"> <a class="code" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686">osPoolId</a> MemPool_Id;</div> +<div class="line"> MEM_BLOCK *addr;</div> +<div class="line"> <a class="code" href="group__CMSIS__RTOS__Status.html#gae2e091fefc4c767117727bd5aba4d99e">osStatus</a> status;</div> +<div class="line"> </div> +<div class="line"> MemPool_Id = <a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a">osPoolCreate</a> (<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga5f0b204a82327533d420210125c90697">osPool</a> (MemPool));</div> +<div class="line"> <span class="keywordflow">if</span> (MemPool_Id != NULL) {</div> +<div class="line"> addr = (MEM_BLOCK *)<a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga9f129fcad4730fbd1048ad4fa262f36a">osPoolCAlloc</a> (MemPool_Id);</div> +<div class="line"> <span class="keywordflow">if</span> (addr != NULL) {</div> +<div class="line"> :</div> +<div class="line"> <span class="comment">// return a memory block back to pool</span></div> +<div class="line"> status = <a class="code" href="group__CMSIS__RTOS__PoolMgmt.html#ga4a861e9c469c9d0daf5721bf174f8e54">osPoolFree</a> (MemPool_Id, addr);</div> +<div class="line"> <span class="keywordflow">if</span> (status==<a class="code" href="group__CMSIS__RTOS__Status.html#gae2e091fefc4c767117727bd5aba4d99ea9e1c9e2550bb4de8969a935acffc968f">osOK</a>) {</div> +<div class="line"> <span class="comment">// handle status code</span></div> +<div class="line"> }</div> +<div class="line"> }</div> +<div class="line"> }</div> +<div class="line">}</div> +</div><!-- fragment --> +</div> +</div> +</div><!-- contents --> +</div><!-- doc-content --> +<!-- start footer part --> +<div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> + <ul> + <li class="footer">Generated on Wed Aug 1 2018 17:12:43 for CMSIS-RTOS by Arm Ltd. All rights reserved. + <!-- + <a href="http://www.doxygen.org/index.html"> + <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6 + --> + </li> + </ul> +</div> +</body> +</html> |