PreemptProtect

PreemptProtect[expr] evaluates expr, without any interruption from preemptive evaluations.

Examples

Protect critical code:

PreemptProtect[
  x = 1;
  y = 2;
  x + y
]

Ensure atomic operations:

PreemptProtect[
  counter++;
  result = Process[counter]
]

In parallel computing:

PreemptProtect[
  AppendTo[sharedList, newValue]
]

Please visit the official Wolfram Language Reference for more details.