A mutex (mutual exclusion) is a synchronization object that enforces exclusive access to a shared resource, preventing race conditions by allowing only one task or thread to hold its lock at a time. In real-time robotic control systems, a mutex protects critical data structures—like a shared sensor buffer or a global state estimate—accessed by concurrent tasks such as a perception loop and a planning thread. Its operations, lock() and unlock(), create a critical section where code executes atomically, ensuring data consistency and deterministic system behavior.




