Consider the following code runs in a multi$-$threaded environment:

uint$32\_$t threadRunning;

void thread$1()$

$\{$

while$($true$)$

$\{$

threadRunning $=1$;

$\}$

$\}$

void thread$2()$

$\{$

while$($true$)$

$\{$

threadRunning $=2$;

$\}$

$\}$

Assume a system has only two threads running: one is running the thread$1()$ function and the other the thread$2()$ function. With no other information about the operating system or scheduler type, what can you say about CPU utilization of each thread?