The Old New Thing

Using modular arithmetic to avoid timing overflow problems

May 31, 2005 May 31, 2005 05/31/05

Raymond Chen

In an earlier article, I presented a simple way of avoiding timing overflows which seemed to create a bit of confusion. The short version: Given a starting time start, an ending time end and an interval interval, the way to check whether the interval has elapsed is to use the expression . The naive expression suffers from integer overflow ...