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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Mac OS X Serial Port Architecture Overview
On Mac OS X, serial ports have an interesting architecture. In the kernel, a serial driver is implemented using the object-oriented I/O Kit framework, but in user space it is accessed through the BSD layer, and the serial port is presented as a traditional UNIX device file. For each serial driver that is loaded in the kernel, the I/O Kit's serial family creates a corresponding device object in the /dev directory of the file system. To interact with a serial port, applications open the device file and read and write to it as if it were an ordinary file. This is an alternative to communicating with a driver through a user client; in fact, serial drivers don't have a user client. The advantage of this architecture ...
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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.