Event-Driven Design with the Reactor Pattern in C

Building responsive, high-performance systems requires a solid grasp of how programs handle multiple input and output events without blocking. The Reactor pattern is a cornerstone of event-driven architecture, enabling efficient synchronous I/O multiplexing in resource-constrained environments. In this text-based course, you will transition from writing basic sequential code to designing structured, event-driven systems in C. You will discover how to separate event demultiplexing from application-specific business logic, allowing you to write clean, maintainable, and highly performant system-level applications. What you will learn: 1. Understand the foundational concepts of event-driven design and synchronous I/O multiplexing. 2. Explore the core components of the Reactor pattern, including the event demultiplexer and event handlers. 3. Implement non-blocking I/O operations using standard system calls like select, poll, or modern epoll. 4. Design clean interfaces in C to separate system-level event detection from application logic. 5. Apply error handling and memory safety best practices to ensure system stability. 6. Practice building a lightweight event loop through structured written exercises. The course begins with essential definitions of blocking versus non-blocking I/O before guiding you step-by-step through the architectural components of the Reactor pattern. You will read comprehensive explanations, analyze detailed code snippets, and complete conceptual exercises to solidify your understanding. This course is designed for beginner-to-intermediate C programmers, systems enthusiasts, and hardware developers who want to learn event-driven architecture from the ground up. No prior experience with event loops or network programming is required. Start reading today to unlock the power of event-driven design in your C applications.