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  • Book Overview & Buying Extreme C
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Extreme C

Extreme C

By : Kamran Amini
4.5 (29)
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Extreme C

Extreme C

4.5 (29)
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 (27 chapters)
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Index

Named mutexes

POSIX mutexes work simply in multi-threaded programs; we demonstrated this in Chapter 16, Thread Synchronization. This would not be the case with regard to multiple process environments, however. To have a mutex work among a number of processes, it would need to be defined within a place that is accessible to all of them.

The best choice for a shared place such as this is a shared memory region. Therefore, to have a mutex that works in a multi-process environment, it should be distributed in a shared memory region.

The first example

The following example, example 18.2, is a clone of example 18.1, but it solves the potential race condition using named mutexes instead of named semaphores. It also shows how to make a shared memory region and use it to store a shared mutex.

Since each shared memory object has a global name, a mutex stored in a shared memory region can be considered named and can be accessed by other processes throughout the system.

The following...

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Extreme C
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