October 2018
Beginner
794 pages
19h 23m
English
Content preview from Hands-On System Programming with Linux
Become 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,
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.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.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.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.
The ABBA deadlock
A more complex form of deadlock can emerge in a scenario which involves nested locking: two or more competing threads and two or more locks. Here, let's take the simplest case: a scenario with two threads (A and B) working with two locks (L1 and L2).
Let's say that this is what unfolds over the vertical timeline, as the following table reveals:
| Time | Thread A | Thread B |
| t1 | Attempt to take lock L1 | Attempt to take lock L2 |
| t2 | Gets lock L1 | Gets lock L2 |
| t3 | <--- In critical section of L1 ---> | <--- In critical section of L2 ---> |
| t4 | Attempt to take lock L2 | Attempt to take lock L1 |
| t5 | Block on L2 being unlocked | Block on L1 being unlocked |
| <waits forever: deadlock> | <waits forever: deadlock> |
It's quite clear that ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.