Book Image

Practical C Programming

By : B. M. Harwani
Book Image

Practical C Programming

By: B. M. Harwani

Overview of this book

Used in everything from microcontrollers to operating systems, C is a popular programming language among developers because of its flexibility and versatility. This book helps you get hands-on with various tasks, covering the fundamental as well as complex C programming concepts that are essential for making real-life applications. You’ll start with recipes for arrays, strings, user-defined functions, and pre-processing directives. Once you’re familiar with the basic features, you’ll gradually move on to learning pointers, file handling, concurrency, networking, and inter-process communication (IPC). The book then illustrates how to carry out searching and arrange data using different sorting techniques, before demonstrating the implementation of data structures such as stacks and queues. Later, you’ll learn interesting programming features such as using graphics for drawing and animation, and the application of general-purpose utilities. Finally, the book will take you through advanced concepts such as low-level programming, embedded software, IoT, and security in coding, as well as techniques for improving code performance. By the end of this book, you'll have a clear understanding of C programming, and have the skills you need to develop robust apps.
Table of Contents (20 chapters)

Understanding how a deadlock is created

Locking a resource helps in non-ambiguous results, but locking can also lead to a deadlock. A deadlock is a situation wherein a thread has acquired the lock for one resource and wants to acquire the lock for a second resource. However, at the same time, another thread has acquired the lock for the second resource, but wants the lock for the first resource. Because the first thread will keep waiting for the second resource lock to be free and the second thread will keep waiting for the first resource lock to be free, the threads will not be able to proceed further, and the application will hang (as the following diagram illustrates):

Figure 7.4

In this recipe, we will use a stack. A stack requires two operations—push and pop. To make only one thread execute a push or pop operation at a time, we will use two mutex objects—pop_mutex...