The type of instruction sequence that can lead to race conditions when applied to a shared variable such as a lock due to an interrupt is called $\_\_\_\_\_\_\_\_,\_\_\_\_\_\_\_\_,\_\_\_\_\_\_\_\_$ operation $($in order of operation, one word each$).$

The way to eliminate the race condition is to make the above sequence a$($n$)\_\_\_\_\_\_\_$ action $($single word$).$

The name of this instruction is called