February 2015
Intermediate to advanced
686 pages
18h 52m
English
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Chapter 18
Resource Sharing
Abstract
Tasks can share resources in various ways. Multiple threads within the same process can share global variables, through which data can flow back and forth among them. File or memory region objects can be shared via memory mapping by multiple processes. The integrity of an exclusive resource can be endangered when multiple tasks gain access to it at the same time. Semaphore, mutex, and condition variable are POSIX objects that are normally used to protect the integrity of shared resources. For each type of these POSIX objects, we explain the corresponding POSIX functions, examine their usage patterns, and give a few running examples.
Keyword
Shared variables
Shared memory object
Semaphore
Mutex
Condition ...
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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.