Book Image

Extreme C

By : Kamran Amini
5 (1)
Book Image

Extreme C

5 (1)
By: Kamran Amini

Overview of this book

There’s a lot more to C than knowing the language syntax. The industry looks for developers with a rigorous, scientific understanding of the principles and practices. Extreme C will teach you to use C’s advanced low-level power to write effective, efficient systems. This intensive, practical guide will help you become an expert C programmer. Building on your existing C knowledge, you will master preprocessor directives, macros, conditional compilation, pointers, and much more. You will gain new insight into algorithm design, functions, and structures. You will discover how C helps you squeeze maximum performance out of critical, resource-constrained applications. C still plays a critical role in 21st-century programming, remaining the core language for precision engineering, aviations, space research, and more. This book shows how C works with Unix, how to implement OO principles in C, and fully covers multi-processing. In Extreme C, Amini encourages you to think, question, apply, and experiment for yourself. The book is essential for anybody who wants to take their C to the next level.
Table of Contents (23 chapters)

Threads

In the previous chapter, we discussed threads as part of the multithreading approach that you can use when wanting to write concurrent programs in a POSIX-compliant operating system.

In this section, you will find a recap on everything you should know about threads. We will also bring in some new information that is relevant to topics we will discuss later. Remember that all of this information will act as a foundation for continuing to develop multithreaded programs.

Every thread is initiated by a process. It will then belong to that process forever. It is not possible to have a shared thread or transfer the ownership of a thread to another process. Every process has at least one thread that is its main thread. In a C program, the main function is executed as part of the main thread.

All the threads share the same Process ID (PID). If you use utilities like top or htop, you can easily see the threads are sharing the same process ID, and are grouped...