CompareAndSet Operations overriding of values

While going through the Blocking/Non Blocking Algorithms section at the link

and the below code to explain the Atomic compareAndSet operation

boolean updated = false;  while(!updated){  long prevCount = this.count.get();  updated = this.count.compareAndSet(prevCount, prevCount + 1);  }  

It states that

Therefore no synchronization is necessary, and no thread suspension is necessary. This saves the thread suspension overhead.

Does it mean that if there are 2 threads that call compareAndSet() at the same time in the above code, both of them will execute concurrently or parallelly which is in contrast to the synchronized block where one thread gets blocked if both access simultaneously? If that's the case wouldn't the values get overriden in the above case? Which is same case when there is no synchronization?

https://stackoverflow.com/questions/65531151/compareandset-operations-overriding-of-values January 01, 2021 at 11:47PM