How to deal with a wrapping counter in embedded C

Question

I need to deal with a counter that gives me ticks for my application. The counter is 32bits so what i need to know is how to deal with it when it wraps. for example:

I h

Answer 1

One of the possibilities is to cast both variables to 64-bit long and then do sum. After that compare with maximum 32-bit value to identify if it's wrapped.