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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Summary
In this chapter we have:
- Given an overview of the Mac OS X and iOS operating systems. We have discussed their general background and origin, with a particular focus on the kernel, the major topic of this book.
- Looked at the XNU kernel, which is the kernel for both OS X and iOS.
- Discussed the layered architecture of the XNU kernel, which consists of three major components: the Mach, the BSD, and the I/O Kit. The Mach layer can be seen as the inner ring, closest to the hardware, which provides services to the rest of the kernel. Services provided by the Mach layer include hardware abstraction, virtual memory, and task scheduling.
- Discussed the operation of the Mach scheduler, and the difference between tasks and threads. A task can be ...
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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.