Struct crossbeam_utils::sync::WaitGroup[][src]

pub struct WaitGroup { /* fields omitted */ }
Expand description

Enables threads to synchronize the beginning or end of some computation.

Wait groups vs barriers

WaitGroup is very similar to Barrier, but there are a few differences:

  • Barrier needs to know the number of threads at construction, while WaitGroup is cloned to register more threads.

  • A Barrier can be reused even after all threads have synchronized, while a WaitGroup synchronizes threads only once.

  • All threads wait for others to reach the Barrier. With WaitGroup, each thread can choose to either wait for other threads or to continue without blocking.

Examples

use crossbeam_utils::sync::WaitGroup;
use std::thread;

// Create a new wait group.
let wg = WaitGroup::new();

for _ in 0..4 {
    // Create another reference to the wait group.
    let wg = wg.clone();

    thread::spawn(move || {
        // Do some work.

        // Drop the reference to the wait group.
        drop(wg);
    });
}

// Block until all threads have finished their work.
wg.wait();

Implementations

impl WaitGroup[src]

pub fn new() -> Self[src]

Creates a new wait group and returns the single reference to it.

Examples

use crossbeam_utils::sync::WaitGroup;

let wg = WaitGroup::new();

pub fn wait(self)[src]

Drops this reference and waits until all other references are dropped.

Examples

use crossbeam_utils::sync::WaitGroup;
use std::thread;

let wg = WaitGroup::new();

thread::spawn({
    let wg = wg.clone();
    move || {
        // Block until both threads have reached `wait()`.
        wg.wait();
    }
});

// Block until both threads have reached `wait()`.
wg.wait();

Trait Implementations

impl Clone for WaitGroup[src]

fn clone(&self) -> WaitGroup[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for WaitGroup[src]

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

Formats the value using the given formatter. Read more

impl Default for WaitGroup[src]

fn default() -> Self[src]

Returns the “default value” for a type. Read more

impl Drop for WaitGroup[src]

fn drop(&mut self)[src]

Executes the destructor for this type. Read more

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.