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)

Parallelism

Parallelism simply means having two tasks run at the same time, or in parallel. The phrase "in parallel" is the key element that differentiates parallelism from concurrency. Why is this? Because parallel implies that two things are happening simultaneously. This is not the case in a concurrent system; in concurrent systems, you need to pause one task in order to let another continue execution. Note that this definition can be too simple and incomplete regarding the modern concurrent systems, but it is sufficient for us to give you a basic idea.

We meet parallelism regularly in our daily lives. When you and your friend are doing two separate tasks simultaneously, those tasks are being done in parallel. To have a number of tasks in parallel, we need separate and isolated processing units, each of which is assigned to a certain task. For instance, in a computer system, each CPU core is a processor unit that can handle one task at a time.

For a minute, look...