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 129   <div class="headertitle"><div class="title">Process Isolation<div class="ingroups"><a class="el" href="group__CMSIS__RTOS.html">CMSIS-RTOS API v2</a></div></div></div>
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 135 <tr class="memitem:group__rtos__process__isolation__mpu"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__rtos__process__isolation__mpu.html">MPU Protected Zones</a></td></tr>
 136 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
 137 <tr class="memitem:group__rtos__process__isolation__safety__class"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__rtos__process__isolation__safety__class.html">Safety Classes</a></td></tr>
 138 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
 139 <tr class="memitem:group__rtos__process__isolation__thread__wdt"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__rtos__process__isolation__thread__wdt.html">Thread Watchdogs</a></td></tr>
 140 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
 141 <tr class="memitem:group__rtos__process__isolation__faults"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__rtos__process__isolation__faults.html">Fault Handling</a></td></tr>
 142 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
 143 </table>
 144 <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
 145 <p>This chapter explains mechanisms available for process isolation support in CMSIS-RTOS2 API. </p>
 146 <p>CMSIS-RTOS2 API defines a set of features to protect critical parts of an application against software flaws that may exist in other parts of an application.</p>
 147 <dl class="section user"><dt></dt><dd><ul>
 148 <li><b><a class="el" href="group__rtos__process__isolation__mpu.html">MPU Protected Zones</a></b> for memory access protection in the system. <br  />
 149  RTOS threads can access only memory regions and peripherals based on their MPU Protected Zone assignment. Non-privileged thread code cannot accidentally modify critical RTOS kernel data or memory belonging to other zones.</li>
 150 </ul>
 151 </dd></dl>
 152 <dl class="section user"><dt></dt><dd><ul>
 153 <li><b><a class="el" href="group__rtos__process__isolation__safety__class.html">Safety Classes</a></b> for access protection to RTOS objects. <br  />
 154  The RTOS objects with a higher safety class assigned to them cannot be modified via RTOS API functions from threads that have lower safety class assigned.</li>
 155 </ul>
 156 </dd></dl>
 157 <dl class="section user"><dt></dt><dd><ul>
 158 <li><b><a class="el" href="group__rtos__process__isolation__thread__wdt.html">Thread Watchdogs</a></b> to verify execution times of threads. <br  />
 159  Each thread can maintain own thread watchdog and in case of timing violations, corresponding thread watchdog alarm will be triggered.</li>
 160 </ul>
 161 </dd></dl>
 162 <dl class="section user"><dt></dt><dd><ul>
 163 <li><b><a class="el" href="group__rtos__process__isolation__faults.html">Fault Handling</a></b> in case of a detected failure (for example thread watchdog alarm or MPU Fault). <br  />
 164  The RTOS provides functions to block execution of malfunctioning components and with that dedicate system resources for operation of the safety critical threads.</li>
 165 </ul>
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