Book Image

Rust Programming By Example

By : Guillaume Gomez, Antoni Boucher
Book Image

Rust Programming By Example

By: Guillaume Gomez, Antoni Boucher

Overview of this book

Rust is an open source, safe, concurrent, practical language created by Mozilla. It runs blazingly fast, prevents segfaults, and guarantees safety. This book gets you started with essential software development by guiding you through the different aspects of Rust programming. With this approach, you can bridge the gap between learning and implementing immediately. Beginning with an introduction to Rust, you’ll learn the basic aspects such as its syntax, data types, functions, generics, control flows, and more. After this, you’ll jump straight into building your first project, a Tetris game. Next you’ll build a graphical music player and work with fast, reliable networking software using Tokio, the scalable and productive asynchronous IO Rust library. Over the course of this book, you’ll explore various features of Rust Programming including its SDL features, event loop, File I/O, and the famous GTK+ widget toolkit. Through these projects, you’ll see how well Rust performs in terms of concurrency—including parallelism, reliability, improved performance, generics, macros, and thread safety. We’ll also cover some asynchronous and reactive programming aspects of Rust. By the end of the book, you’ll be comfortable building various real-world applications in Rust.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Events and Basic Game Mechanisms

Using Tokio

Tokio is based on the lower-level crate mio, which is itself directly based on system calls such as epoll (Linux), kqueue (FreeBSD), and IOCP (Windows). This crate is also based on the futures crate, which provides abstractions to reason about a value (or multiple values) that will be available later. As I told you when using asynchronous I/O, the calls do not block so we need a way to know when the result of a read is available. This is where Future and Stream, two abstractions from the futures crate, come into play.

Tokio event loop

Tokio also provides an event loop, on which we will be able to execute some code (with futures) that will be executed when some I/O events happen, such as when the result of a socket read is ready. To do so, the event loop will register events on specific file descriptors that represent sockets. It registers these events using the aforementioned system calls and then waits for any of the registered events to happen. The file descriptors and the system...