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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Synchronization Primitives
Synchronization problems occur when code that is executing on two or more threads attempts to access a common resource or structure. A common synchronization problem for I/O Kit drivers arises when a driver needs to access its instance variables, since these are shared between all of the threads that the driver is executing. To give a concrete example, let's consider an actual example from the I/O Kit, namely, the OSObject base class's implementation of reference counting.
The OSObject class is the base class for all objects in the I/O Kit, and one of its roles is to maintain a reference count for each object instance and to release an object when its reference count is decremented to 0. A simplified version of the ...
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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.