Struct Scope

pub struct Scope<'env> { /* private fields */ }

A scope for spawning threads.

Implementations

impl<'env> Scope<'env>

pub fn spawn<'scope, F, T>(&'scope self, f: F) -> ScopedJoinHandle<'scope, T>

where F: FnOnce(&Scope<'env>) -> T + Send + 'env, T: Send + 'env,

Spawns a scoped thread.

This method is similar to the spawn function in Rust’s standard library. The difference is that this thread is scoped, meaning it’s guaranteed to terminate before the scope exits, allowing it to reference variables outside the scope.

The scoped thread is passed a reference to this scope as an argument, which can be used for spawning nested threads.

The returned handle can be used to manually join the thread before the scope exits.

This will create a thread using default parameters of ScopedThreadBuilder, if you want to specify the stack size or the name of the thread, use this API instead.

Panics

Panics if the OS fails to create a thread; use ScopedThreadBuilder::spawn to recover from such errors.

Examples

use crossbeam_utils::thread;

thread::scope(|s| {
    let handle = s.spawn(|_| {
        println!("A child thread is running");
        42
    });

    // Join the thread and retrieve its result.
    let res = handle.join().unwrap();
    assert_eq!(res, 42);
}).unwrap();

pub fn builder<'scope>(&'scope self) -> ScopedThreadBuilder<'scope, 'env>

Creates a builder that can configure a thread before spawning.

Examples

use crossbeam_utils::thread;

thread::scope(|s| {
    s.builder()
        .spawn(|_| println!("A child thread is running"))
        .unwrap();
}).unwrap();

Trait Implementations

impl Debug for Scope<'_>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Sync for Scope<'_>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes