Struct mmtk::util::copy::GCWorkerCopyContext

pub struct GCWorkerCopyContext<VM: VMBinding> {
    pub copy: [MaybeUninit<CopySpaceCopyContext<VM>>; 1],
    pub immix: [MaybeUninit<ImmixCopyContext<VM>>; 1],
    pub immix_hybrid: [MaybeUninit<ImmixHybridCopyContext<VM>>; 1],
    config: CopyConfig<VM>,
}

The thread local struct for each GC worker for copying. Each GC worker should include one instance of this struct for copying operations.

Fields

copy: [MaybeUninit<CopySpaceCopyContext<VM>>; 1]

Copy allocators for CopySpace

immix: [MaybeUninit<ImmixCopyContext<VM>>; 1]

Copy allocators for ImmixSpace

immix_hybrid: [MaybeUninit<ImmixHybridCopyContext<VM>>; 1]

Copy allocators for ImmixSpace

config: CopyConfig<VM>

The config for the plan

Implementations

impl<VM: VMBinding> GCWorkerCopyContext<VM>

pub fn alloc_copy( &mut self, original: ObjectReference, bytes: usize, align: usize, offset: usize, semantics: CopySemantics ) -> Address

Allocate for the object for GC copying.

Arguments:

• original: The original object that will be copied.
• bytes: The size in bytes for the allocation.
• align: The alignment in bytes for the allocation.
• offset: The offset in bytes for the allocation.
• semantics: The copy semantic for this coying allocation. It determins which copy allocator will be used for the copying.

pub fn post_copy( &mut self, object: ObjectReference, bytes: usize, semantics: CopySemantics )

Post allocation after allocating an object.

Arguments:

• object: The newly allocated object (the new object after copying).
• bytes: The size of the object in bytes.
• semantics: The copy semantic used for the copying.

pub fn prepare(&mut self)

Prepare the copying allocators.

pub fn release(&mut self)

Release the copying allocators.

pub fn new( worker_tls: VMWorkerThread, mmtk: &MMTK<VM>, config: CopyConfig<VM> ) -> Self

Create a GCWorkerCopyContext based on the configuration for a copying plan.

Arguments:

• worker_tls: The worker thread for this copy context.
• plan: A reference to the current plan.
• config: The configuration for the copy context.

pub fn new_non_copy() -> Self

Create a stub GCWorkerCopyContext for non copying plans.