Rust Threading Fundamentals | Spawn Native OS Threads

Introduction

In this lab, we have a code snippet in Rust that demonstrates how to spawn native OS threads using the spawn function and a moving closure. The code creates a vector to hold the spawned threads, iterates through a range of numbers to spawn multiple threads, and prints a message identifying each thread number. Finally, the main thread waits for each spawned thread to finish using the join function.

Note: If the lab does not specify a file name, you can use any file name you want. For example, you can use main.rs, compile and run it with rustc main.rs && ./main.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL rust(("`Rust`")) -.-> rust/BasicConceptsGroup(["`Basic Concepts`"]) rust(("`Rust`")) -.-> rust/DataTypesGroup(["`Data Types`"]) rust(("`Rust`")) -.-> rust/ControlStructuresGroup(["`Control Structures`"]) rust(("`Rust`")) -.-> rust/FunctionsandClosuresGroup(["`Functions and Closures`"]) rust(("`Rust`")) -.-> rust/DataStructuresandEnumsGroup(["`Data Structures and Enums`"]) rust/BasicConceptsGroup -.-> rust/variable_declarations("`Variable Declarations`") rust/BasicConceptsGroup -.-> rust/mutable_variables("`Mutable Variables`") rust/BasicConceptsGroup -.-> rust/constants_usage("`Constants Usage`") rust/DataTypesGroup -.-> rust/integer_types("`Integer Types`") rust/ControlStructuresGroup -.-> rust/for_loop("`for Loop`") rust/FunctionsandClosuresGroup -.-> rust/function_syntax("`Function Syntax`") rust/FunctionsandClosuresGroup -.-> rust/expressions_statements("`Expressions and Statements`") rust/DataStructuresandEnumsGroup -.-> rust/method_syntax("`Method Syntax`") subgraph Lab Skills rust/variable_declarations -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} rust/mutable_variables -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} rust/constants_usage -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} rust/integer_types -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} rust/for_loop -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} rust/function_syntax -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} rust/expressions_statements -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} rust/method_syntax -.-> lab-99266{{"`Spawning Native Threads in Rust`"}} end

Threads

Rust provides a mechanism for spawning native OS threads via the spawn function, the argument of this function is a moving closure.

use std::thread; const NTHREADS: u32 = 10; // This is the `main` thread fn main() { // Make a vector to hold the children which are spawned. let mut children = vec![]; for i in 0..NTHREADS { // Spin up another thread children.push(thread::spawn(move || { println!("this is thread number {}", i); })); } for child in children { // Wait for the thread to finish. Returns a result. let _ = child.join(); } }

These threads will be scheduled by the OS.

Spawning Native Threads in Rust

Introduction

Skills Graph

Threads

Summary

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