Is there any point in using a volatile long?

Question

I occasionally use a volatile instance variable in cases where I have two threads reading from / writing to it and don\'t want the overhead (or potential deadlo

Answer 1

"volatile" serves multiple purposes:

• guarantees atomic writes to double/long
• guarantees that when a thread A sees change in volatile variable made by thread B, thread A can also see all other changes made by thread B before the change to volatile variable (think setting the number of used cells in array after setting the cells themselves).
• prevents compiler optimization based on assumption that only one thread can change the variable (think tight loop while (l != 0) {}.

Is there more?