January 2004
Intermediate to advanced
432 pages
11h 1m
English
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Synchronization
One of the challenges of multiprocessor systems is synchronizing access between the processors. In the early days of UNIX, it could be assumed that there was only one processor and only one kernel, and once that kernel started running, it had absolute control of the system. If the kernel had a critical sequence of instructions, it could turn off interrupts and execute that code without the risk of anything interrupting the flow. With multiprocessor systems, even with interrupts off, it is possible that two processors could try to access the same data at the same time. For an example of why this is a problem, consider the following code, which stores a value into a circular buffer, increments the index into the buffer, then wraps ...
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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.