Struct heron::rapier_plugin::rapier2d::crossbeam::sync::WaitGroup [−]
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, whileWaitGroup
is cloned to register more threads. -
A
Barrier
can be reused even after all threads have synchronized, while aWaitGroup
synchronizes threads only once. -
All threads wait for others to reach the
Barrier
. WithWaitGroup
, 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
impl WaitGroup
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)
pub fn wait(self)
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
Auto Trait Implementations
impl !RefUnwindSafe for WaitGroup
impl !UnwindSafe for WaitGroup
Blanket Implementations
Mutably borrows from an owned value. Read more
impl<T> Downcast for T where
T: Any,
impl<T> Downcast for T where
T: Any,
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
. Read more
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more
impl<T> FromWorld for T where
T: Default,
impl<T> FromWorld for T where
T: Default,
pub fn from_world(_world: &mut World) -> T
pub fn from_world(_world: &mut World) -> T
Creates Self
using data from the given [World]
impl<T> Pointable for T
impl<T> Pointable for T
impl<SS, SP> SupersetOf<SS> for SP where
SS: SubsetOf<SP>,
impl<SS, SP> SupersetOf<SS> for SP where
SS: SubsetOf<SP>,
The inverse inclusion map: attempts to construct self
from the equivalent element of its
superset. Read more
pub fn is_in_subset(&self) -> bool
pub fn is_in_subset(&self) -> bool
Checks if self
is actually part of its subset T
(and can be converted to it).
pub fn to_subset_unchecked(&self) -> SS
pub fn to_subset_unchecked(&self) -> SS
Use with care! Same as self.to_subset
but without any property checks. Always succeeds.
pub fn from_subset(element: &SS) -> SP
pub fn from_subset(element: &SS) -> SP
The inclusion map: converts self
to the equivalent element of its superset.
pub fn clone_type_data(&self) -> Box<dyn TypeData + 'static, Global>
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more