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CursorEntry

ostd::specs::mm::embedding

Struct CursorEntry

pub struct CursorEntry<'rcu> {
    pub vm_space: VmSpaceId,
    pub kind: CursorKind,
    pub va: Range<Vaddr>,
    pub owner: CursorOwner<'rcu, UserPtConfig>,
    pub guards: Guards<'rcu>,
}

Expand description

Per-cursor entry in the store.

guards is the lock-protocol state for the page-table nodes the cursor holds locked; mirrors what the exec Cursor carries via path: [Option<PageTableGuard<'rcu, C>>; NR_LEVELS].

Fields§

§vm_space: VmSpaceId§kind: CursorKind§va: Range<Vaddr>§owner: CursorOwner<'rcu, UserPtConfig>§guards: Guards<'rcu>

Implementations§

impl<'rcu> CursorEntry<'rcu>

pub open spec fn inv(self) -> bool

{
    &&& self.owner.inv()
    &&& self.owner.children_not_locked(self.guards)
    &&& self.owner.nodes_locked(self.guards)
    &&& !self.owner.popped_too_high

}

The portion of the exec Cursor::invariants(owner, regions, guards) expressible from the entry alone (no regions).

Mirrors crate::mm::page_table::Cursor::invariants minus regions.inv(), metaregion_sound(regions), and the exec-handle pieces (self.inv() / self.wf(owner)). Those live in VmStore::inv (regions-touching) and are MODEL GAPS (handle).

Auto Trait Implementations§

impl<'rcu> Freeze for CursorEntry<'rcu>

impl<'rcu> !RefUnwindSafe for CursorEntry<'rcu>

impl<'rcu> Send for CursorEntry<'rcu>

impl<'rcu> Sync for CursorEntry<'rcu>

impl<'rcu> Unpin for CursorEntry<'rcu>

impl<'rcu> UnsafeUnpin for CursorEntry<'rcu>

impl<'rcu> !UnwindSafe for CursorEntry<'rcu>

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

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Immutably borrows from an owned value. Read more

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

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impl<T, VERUS_SPEC__A> FromSpec<T> for VERUS_SPEC__A
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fn obeys_from_spec() -> bool

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Calls U::from(self).

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impl<A> SpecEq<A> for A
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impl<A> SpecEq<Ghost<A>> for A

impl<A> SpecEq<Tracked<A>> for A