pub enum WorkBucketStage {
Show 19 variants Unconstrained, Prepare, ClearVOBits, TPinningClosure, PinningRootsTrace, Closure, SoftRefClosure, WeakRefClosure, FinalRefClosure, PhantomRefClosure, VMRefClosure, CalculateForwarding, SecondRoots, RefForwarding, FinalizableForwarding, VMRefForwarding, Compact, Release, Final,
}
Expand description

This enum defines all the work bucket types. The scheduler will instantiate a work bucket for each stage defined here.

Variants§

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Unconstrained

This bucket is always open.

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Prepare

Preparation work. Plans, spaces, GC workers, mutators, etc. should be prepared for GC at this stage.

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ClearVOBits

Clear the VO bit metadata. Mainly used by ImmixSpace.

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TPinningClosure

Compute the transtive closure starting from transitively pinning (TP) roots following only strong references. No objects in this closure are allow to move.

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PinningRootsTrace

Trace (non-transitively) pinning roots. Objects pointed by those roots must not move, but their children may. To ensure correctness, these must be processed after TPinningClosure

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Closure

Compute the transtive closure following only strong references.

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SoftRefClosure

Handle Java-style soft references, and potentially expand the transitive closure.

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WeakRefClosure

Handle Java-style weak references.

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FinalRefClosure

Resurrect Java-style finalizable objects, and potentially expand the transitive closure.

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PhantomRefClosure

Handle Java-style phantom references.

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VMRefClosure

Let the VM handle VM-specific weak data structures, including weak references, weak collections, table of finalizable objects, ephemerons, etc. Potentially expand the transitive closure.

NOTE: This stage is intended to replace the Java-specific weak reference handling stages above.

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CalculateForwarding

Compute the forwarding addresses of objects (mark-compact-only).

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SecondRoots

Scan roots again to initiate another transitive closure to update roots and reference after computing the forwarding addresses (mark-compact-only).

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RefForwarding

Update Java-style weak references after computing forwarding addresses (mark-compact-only).

NOTE: This stage should be updated to adapt to the VM-side reference handling. It shall be kept after removing {Soft,Weak,Final,Phantom}RefClosure.

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FinalizableForwarding

Update the list of Java-style finalization cadidates and finalizable objects after computing forwarding addresses (mark-compact-only).

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VMRefForwarding

Let the VM handle the forwarding of reference fields in any VM-specific weak data structures, including weak references, weak collections, table of finalizable objects, ephemerons, etc., after computing forwarding addresses (mark-compact-only).

NOTE: This stage is intended to replace Java-specific forwarding phases above.

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Compact

Compact objects (mark-compact-only).

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Release

Work packets that should be done just before GC shall go here. This includes releasing resources and setting states in plans, spaces, GC workers, mutators, etc.

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Final

Resume mutators and end GC.

Implementations§

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impl WorkBucketStage

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pub fn first_stw_stage() -> Self

The first stop-the-world bucket.

Trait Implementations§

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impl Clone for WorkBucketStage

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fn clone(&self) -> WorkBucketStage

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for WorkBucketStage

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

Formats the value using the given formatter. Read more
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impl Enum for WorkBucketStage

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const LENGTH: usize = 19usize

Length of the enum.
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fn from_usize(value: usize) -> Self

Takes an usize, and returns an element matching into_usize function.
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fn into_usize(self) -> usize

Returns an unique identifier for a value within range of 0..Array::LENGTH.
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impl<V> EnumArray<V> for WorkBucketStage

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type Array = [V; 19]

Representation of an enum map for type V.
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impl PartialEq for WorkBucketStage

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fn eq(&self, other: &WorkBucketStage) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for WorkBucketStage

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impl Eq for WorkBucketStage

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impl StructuralPartialEq for WorkBucketStage

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn 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.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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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.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.