 the CMSIS-RTOS <a class="el" href="group__CMSIS__RTOS__MutexMgmt.html">Mutexes</a>. At any time, two or more threads share a resource, such as a memory buffer or a serial port, one of them may have a higher priority. It is expected that the higher-priority thread runs as soon as it is in the <b>READY</b> state. However, if the lower-priority thread is using a shared resource of a higher-priority thread, this higher-priority thread must wait until the lower-priority thread releases the shared resource.</p>
