Book Image

Linux System Programming Techniques

By : Jack-Benny Persson
Book Image

Linux System Programming Techniques

By: Jack-Benny Persson

Overview of this book

Linux is the world's most popular open source operating system (OS). Linux System Programming Techniques will enable you to extend the Linux OS with your own system programs and communicate with other programs on the system. The book begins by exploring the Linux filesystem, its basic commands, built-in manual pages, the GNU compiler collection (GCC), and Linux system calls. You'll then discover how to handle errors in your programs and will learn to catch errors and print relevant information about them. The book takes you through multiple recipes on how to read and write files on the system, using both streams and file descriptors. As you advance, you'll delve into forking, creating zombie processes, and daemons, along with recipes on how to handle daemons using systemd. After this, you'll find out how to create shared libraries and start exploring different types of interprocess communication (IPC). In the later chapters, recipes on how to write programs using POSIX threads and how to debug your programs using the GNU debugger (GDB) and Valgrind will also be covered. By the end of this Linux book, you will be able to develop your own system programs for Linux, including daemons, tools, clients, and filters.
Table of Contents (14 chapters)

Chapter 11: Using Threads in Your Programs

In this chapter, we will learn what threads are and how to use them in Linux. We will write several programs using POSIX threads, otherwise known as pthreads. We will also learn what race conditions are and how to prevent them by using mutexes. Then, we'll learn how to make a mutex program more efficient. Lastly, we'll learn what condition variables are.

Knowing how to write threaded programs will make them faster and more efficient.

In this chapter, we will cover the following recipes:

  • Writing your first threaded program
  • Reading return values from threads
  • Causing a race condition
  • Avoiding race conditions with mutexes
  • Making the mutex program more efficient
  • Using condition variables

Let's get started!