Book Image

Extreme C

By : Kamran Amini
Book Image

Extreme C

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)

Concurrency issues

Throughout the previous chapter, we have seen that a modifiable shared state can cause issues when some concurrent tasks are able to change the shared state's value. Exploring this further we might ask, what kind of issues may occur? What is the main reason behind them? We will answer these questions within this section.

First of all, we need to distinguish the different types of concurrency issues that might occur. Some concurrency issues only exist when no concurrency control mechanism is in place, and some are introduced by using a concurrency control technique.

Regarding the issues in the first group, they happen when you can see that different interleavings result in different overall states. Upon identifying one of these issues, the next step of course will be to begin thinking about a suitable fix to resolve said issue.

Regarding the second group, they only arise following a fix being put in place. This means that when you fix a concurrency issue...