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)

Single-host concurrency control

It is pretty common to be in situations where there are a number of processes running on a single machine that, at the same time, need to have simultaneous access to a shared resource. Since all of the processes are running within the same operating system, they have access to all the facilities which their operating system provides.

In this section, we show how to use some of these facilities to create a control mechanism that synchronizes the processes. Shared memory plays a key role in most of these control mechanisms; therefore, we heavily rely on what we explained about shared memory in the previous chapter.

The following is a list of POSIX-provided control mechanisms that can be employed while all processes are running on the same POSIX-compliant machine:

  • Named POSIX semaphores: The same POSIX semaphores that we explained in Chapter 16, Thread Synchronization, but with one difference: they have a name now and can be used globally...