I'm trying to implement a program that calls a function every X seconds. I have the basic timer stuff working, using the methods in Time::HiRes, but I'm stumped on a very simple point.

My alarm code works, but the only way I've found to keep the program running is to do something like a "while (true) {};" loop. My repeating alarm goes off and does what it's supposed to, but that tight loop uses up 99.8 percent of the CPU.

I can't use a sleep call in the loop, as that interacts with the alarm timing.

So, is there some sort of way to make my program just sit and wait, doing nothing, until the alarm fires?

Thanks, John

In reply to Waiting for Alarm by n8ur

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