Book Image

Asynchronous Programming in Rust

By : Carl Fredrik Samson
5 (2)
Book Image

Asynchronous Programming in Rust

5 (2)
By: Carl Fredrik Samson

Overview of this book

Step into the world of asynchronous programming with confidence by conquering the challenges of unclear concepts with this hands-on guide. Using functional examples, this book simplifies the trickiest concepts, exploring goroutines, fibers, futures, and callbacks to help you navigate the vast Rust async ecosystem with ease. You’ll start by building a solid foundation in asynchronous programming and explore diverse strategies for modeling program flow. The book then guides you through concepts like epoll, coroutines, green threads, and callbacks using practical examples. The final section focuses on Rust, examining futures, generators, and the reactor-executor pattern. You’ll apply your knowledge to create your own runtime, solidifying expertise in this dynamic domain. Throughout the book, you’ll not only gain proficiency in Rust's async features but also see how Rust models asynchronous program flow. By the end of the book, you'll possess the knowledge and practical skills needed to actively contribute to the Rust async ecosystem.
Table of Contents (16 chapters)
Free Chapter
1
Part 1:Asynchronous Programming Fundamentals
5
Part 2:Event Queues and Green Threads
8
Part 3:Futures and async/await in Rust

Improving our example 4 – pinning to the rescue

Fortunately, the changes we need to make are small, but before we continue and make the changes, let’s create a new folder and copy everything we had in our previous example over to that folder:

  • Copy the entire c-coroutines-problem folder and name the new copy e-coroutines-pin
  • Open Cargo.toml and rename the name of the package e-coroutines-pin

Tip

You’ll find the example code we’ll go through here in this book’s GitHub repository under the ch09/e-coroutines-pin folder.

Now that we have a new folder set up, let’s start making the necessary changes. The logical place to start is our Future definition in future.rs.

future.rs

The first thing we’ll do is pull in Pin from the standard library at the very top:

ch09/e-coroutines-pin/src/future.rs

use std::pin::Pin;

The only other change we need to make is in the definition of poll in our Future trait:

fn...