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Asynchronous Programming in Rust

You're reading from  Asynchronous Programming in Rust

Product type Book
Published in Feb 2024
Publisher Packt
ISBN-13 9781805128137
Pages 306 pages
Edition 1st Edition
Author (1):
Carl Fredrik Samson Carl Fredrik Samson
Profile icon Carl Fredrik Samson

Table of Contents (16) Chapters

Preface 1. Part 1:Asynchronous Programming Fundamentals
2. Chapter 1: Concurrency and Asynchronous Programming: a Detailed Overview 3. Chapter 2: How Programming Languages Model Asynchronous Program Flow 4. Chapter 3: Understanding OS-Backed Event Queues, System Calls, and Cross-Platform Abstractions 5. Part 2:Event Queues and Green Threads
6. Chapter 4: Create Your Own Event Queue 7. Chapter 5: Creating Our Own Fibers 8. Part 3:Futures and async/await in Rust
9. Chapter 6: Futures in Rust 10. Chapter 7: Coroutines and async/await 11. Chapter 8: Runtimes, Wakers, and the Reactor-Executor Pattern 12. Chapter 9: Coroutines, Self-Referential Structs, and Pinning 13. Chapter 10: Creating Your Own Runtime 14. Index 15. Other Books You May Enjoy

Completion-based event queues

IOCP stands for input/output completion port. This is a completion-based event queue. This type of queue notifies you when events are completed. An example of this is when data has been read into a buffer.

The following is a basic breakdown of what happens in this type of event queue:

  1. We create an event queue by calling the syscall CreateIoCompletionPort.
  2. We create a buffer and ask the OS to give us a handle to a socket.
  3. We register an interest in Read events on this socket with another syscall, but this time we also pass in the buffer we created in (step 2) , which the data will be read to.
  4. Next, we call GetQueuedCompletionStatusEx, which will block until an event has been completed.
  5. Our thread is unblocked and our buffer is now filled with the data we’re interested in.
Figure 3.2 – A simplified view of the IOCP flow

Figure 3.2 – A simplified view of the IOCP flow

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