Mutual Exclusion (Mutex) in Operating system

FreeRTOS Tutorial #7 -> Using MUTEX

.All processes share a semaphore variable mutex, initialized to 1. Each process must execute wait(mutex) before entering the critical section and signal(mutex) afterward .Suppose a process executes in the following manner ;wait(mutex) critical section ;wait(mutex) several processes maybe executing in their critical section all of the mentioned a deadlock will occur processes will starve to enter critical section