December 2011
Intermediate to advanced
485 pages
15h 47m
English
Content preview from OS X and iOS Kernel ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Putting It All Together
In this section, we combine what we have covered in this chapter into a single sample that demonstrates one way of structuring a driver that not only responds to power state changes from the system, but also lowers its own power state when the device has been idle for 5 minutes.
For demonstration purposes, the sample driver defines four power states consisting of the mandatory off and on states, as well as two lower power modes. The off and on state will be set by the power management system when the computer is put to sleep and woken from sleep. The two intermediate states are reached when the device has been left idle for a period; the driver sets up an idle timer in its start() method to lower the device's power state ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.