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C++ Programming for Linux Systems

You're reading from  C++ Programming for Linux Systems

Product type Book
Published in Sep 2023
Publisher Packt
ISBN-13 9781805129004
Pages 288 pages
Edition 1st Edition
Languages
Authors (2):
Desislav Andreev Desislav Andreev
Profile icon Desislav Andreev
Stanimir Lukanov Stanimir Lukanov
Profile icon Stanimir Lukanov
View More author details

Table of Contents (15) Chapters

Preface 1. Part 1:Securing the Fundamentals
2. Chapter 1: Getting Started with Linux Systems and the POSIX Standard 3. Chapter 2: Learning More about Process Management 4. Chapter 3: Navigating through the Filesystems 5. Chapter 4: Diving Deep into the C++ Object 6. Chapter 5: Handling Errors with C++ 7. Part 2:Advanced Techniques for System Programming
8. Chapter 6: Concurrent System Programming with C++ 9. Chapter 7: Proceeding with Inter-Process Communication 10. Chapter 8: Using Clocks, Timers, and Signals in Linux 11. Chapter 9: Understanding the C++ Memory Model 12. Chapter 10: Using Coroutines in C++ for System Programming 13. Index 14. Other Books You May Enjoy

Guaranteeing atomic operations through semaphores and mutual exclusions

Let’s try to zoom in on a shared resource and see what happens in the CPU. We will provide a simple and effective way to explain where exactly the data races start from. They were already thoroughly discussed in Chapter 6. Everything we learn here should be considered as an addition, in a sense, but the analysis methodology of concurrent and parallel processing remains the same as earlier. But now, we focus on concrete low-level problems.

Let’s look closely at the following snippet:

int shrd_res = 0; //Some shared resource.
void thread_func(){
    shrd_res ++;
    std::cout << shrd_res;
}

It is a very simple piece of code in which a variable is incremented and printed out. According to C++ standards, such a modification is an undefined behavior in multithreaded environments. Let’s see how – instead of going through the process’...

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