pub enum MaybeInstanceOwned<T> {
Host(Box<UnsafeCell<T>>),
Instance(NonNull<T>),
}
Expand description
Data used by the generated code is generally located inline within the
VMContext
for items defined in an instance. Host-defined objects are
allocated separately and owned directly by the context.
Variants§
Host(Box<UnsafeCell<T>>)
The data is owned here.
Instance(NonNull<T>)
The data is stored inline in the VMContext
of an instance.
Implementations§
Trait Implementations§
Auto Trait Implementations§
impl<T> Freeze for MaybeInstanceOwned<T>
impl<T> !RefUnwindSafe for MaybeInstanceOwned<T>
impl<T> !Send for MaybeInstanceOwned<T>
impl<T> !Sync for MaybeInstanceOwned<T>
impl<T> Unpin for MaybeInstanceOwned<T>
impl<T> UnwindSafe for MaybeInstanceOwned<T>where
T: RefUnwindSafe + UnwindSafe,
Blanket Implementations§
Source§impl<T> ArchivePointee for T
impl<T> ArchivePointee for T
Source§type ArchivedMetadata = ()
type ArchivedMetadata = ()
The archived version of the pointer metadata for this type.
Source§fn pointer_metadata(
_: &<T as ArchivePointee>::ArchivedMetadata,
) -> <T as Pointee>::Metadata
fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata
Converts some archived metadata to the pointer metadata for itself.
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> LayoutRaw for T
impl<T> LayoutRaw for T
Source§fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>
fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>
Returns the layout of the type.
Source§impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
Source§unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool
unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool
Returns whether the given value has been niched. Read more
Source§fn resolve_niched(out: Place<NichedOption<T, N1>>)
fn resolve_niched(out: Place<NichedOption<T, N1>>)
Writes data to
out
indicating that a T
is niched.