The CompareAndSet operation atomically compares the contents of a memory location to a

given value and, only if they are the same, modifies the contents of that memory location to a

given new value. CompareAndSet returns true if the value was set

bool CompareAndSet $($int $*$mem$,$ int oldVal, int newVal$)$;

Write a function, which atomically multiplies a value at a given memory location and returns the

updated value using this instruction.

int atomicMultiply$($int $*$location$,$ int multiplier$)$