What type of loop is at the heart of the operating system

[Guest]

At the heart of the operating system, there has to be a
loop of some sort to keep everything going. I'm curiuos
as to what type of loop it is.

Is it a While(!shutdown) ...

Do ... While(!shutdown) ...

A for(;; loop


Or something else?

I'm not really sure where to post this question, but this
forum seemed somewhat related.

 

[Pavel A.]

while ( !crashed) { ApplySecurityPatch(); Reboot(); }
DisplayBluescreen();

--PA