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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Memory Allocation
The XNU kernel provides a rich set of tools for allocating memory. Kernel memory allocation is not as trivial and straightforward as the malloc() / free() interface found in user space libraries. Kernel memory allocation facilities range from high-level mechanisms analogous to the user space malloc() interface to direct allocation of raw pages. There are dozens of various functions for obtaining memory. Which one to use depends on the subsystem you are working within—for example, Mach, BSD, or the I/O Kit—as well as the requirements for the memory, such as size or alignment. Memory is arguably one of the most limited resources on a computer system, especially for the iOS platform, which has limited amounts of physical memory ...
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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.