https://devzone.nordicsemi.com/f/nordic-q-a/120477/nrf-fundamental-course-lesson-8-exercise-1Hello, I have a question about the NRF SDK fundamental lesson 8 exercise 1. In the code below get_access and release_access are executed in different threads. The semaphore is initialized with count of 10. Since the semaphore count is greater than zeroen-USTelligent Community 13Tue, 08 Apr 2025 05:05:35 GMThttps://devzone.nordicsemi.com/thread/530923?ContentTypeID=1Tue, 08 Apr 2025 05:05:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1421d464-733e-4156-8077-a92c2b25cd73Susheel Nuguru<p>That is great observation Sam, I wrote this lesson and I see that there is room for improvement here. Theoretically,&nbsp;<span>available_instance_count is prone to corruption</span></p> <p>I think you understand the mutual exclusion thing properly. I think we got lucky here are the window where the race condition happens is relatively small and somehow the compiler managed to access this variable in an atomic way. I should have just made this variable atomic to remove the possible race condition window.</p><div style="clear:both;"></div>