Book Image

Rust Standard Library Cookbook

By : Jan Hohenheim, Daniel Durante
Book Image

Rust Standard Library Cookbook

By: Jan Hohenheim, Daniel Durante

Overview of this book

Mozilla’s Rust is gaining much attention with amazing features and a powerful library. This book will take you through varied recipes to teach you how to leverage the Standard library to implement efficient solutions. The book begins with a brief look at the basic modules of the Standard library and collections. From here, the recipes will cover packages that support file/directory handling and interaction through parsing. You will learn about packages related to advanced data structures, error handling, and networking. You will also learn to work with futures and experimental nightly features. The book also covers the most relevant external crates in Rust. By the end of the book, you will be proficient at using the Rust Standard library.
Table of Contents (12 chapters)

Providing futures with a CPU pool and waiting for them

Futures are usually assigned to a Task, which gets assigned to an Executor. When a task is awake, the executor will place the task into a queue, and will call poll() on the task until the process has been completed. Futures offer us a few convenient ways to execute tasks:

  • Spawn a future task manually with futures::executor::block_on().
  • Using futures::executor::LocalPool, which is useful for performing many small tasks on a single thread. In our future returns, we would not be required to implement Send since we are only involving the task on a single thread. However, you are required to use futures::executor::spawn_local() on the Executor if you omit the Send trait.
  • Using futures::executor::ThreadPool, which allows us to offload tasks to other threads.