A synchronization Mutex. A synchronization Mutex. Element used to synchronize multiple [Thread]s. Basically a binary [Semaphore]. Guarantees that only one thread can ever acquire this lock at a time. Can be used to protect a critical section. Be careful to avoid deadlocks. Lock this [Mutex], blocks until it is unlocked by the current owner. Try locking this [Mutex], does not block. Returns [code]OK[/code] on success, [code]ERR_BUSY[/code] otherwise. Unlock this [Mutex], leaving it to other threads.