April 2012
Intermediate to advanced
352 pages
8h
English
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Reader/Writer Locks
Reader/writer locks (rw locks) are basically mutexes with sx lock semantics. Like sx locks, threads can hold rw locks as a reader, which is identical to a shared hold, or as a writer, which is identical to an exclusive hold. Like mutexes, rw locks support priority propagation and threads cannot hold them while sleeping (or the kernel will panic).
rw locks are used when you need to protect an object that is mostly going to be read from instead of written to.
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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.