UniqueFrameOwner

ostd::specs::mm::frame::unique

Struct UniqueFrameOwner 

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pub struct UniqueFrameOwner<M: AnyFrameMeta + Repr<MetaSlotStorage> + OwnerOf> {
    pub meta_own: M::Owner,
    pub meta_perm: PointsTo<MetaSlot, Metadata<M>>,
    pub slot_index: usize,
}

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§meta_own: M::Owner§meta_perm: PointsTo<MetaSlot, Metadata<M>>§slot_index: usize

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impl<M: AnyFrameMeta + Repr<MetaSlotSmall>> UniqueFrameOwner<Link<M>>

{
    &&& self.meta_perm.value().metadata.prev is None
    &&& self.meta_perm.value().metadata.next is None
    &&& self.meta_own.paddr == self.meta_perm.addr()

}
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impl<M: AnyFrameMeta + Repr<MetaSlotStorage> + OwnerOf> UniqueFrameOwner<M>

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pub open spec fn perm_inv(self, perm: PointsTo<MetaSlot>) -> bool

{
    &&& perm.is_init()
    &&& perm.addr() == self.meta_perm.addr()

}
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pub open spec fn global_inv(self, regions: MetaRegionOwners) -> bool

{
    &&& !regions.slots.contains_key(self.slot_index)
    &&& regions.slot_owners.contains_key(self.slot_index)
    &&& regions.slot_owners[self.slot_index].inner_perms == self.meta_perm.inner_perms
    &&& self.meta_perm.addr() == regions.slot_owners[self.slot_index].self_addr

}
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pub proof fn from_raw_owner( owner: M::Owner, index: Ghost<usize>, perm: PointsTo<MetaSlot, Metadata<M>>, ) -> Self

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pub open spec fn from_unused_owner_spec( old_regions: MetaRegionOwners, paddr: Paddr, metadata: M, res: Self, regions: MetaRegionOwners, ) -> bool

{
    &&& <M as OwnerOf>::wf(metadata, res.meta_own)
    &&& res.meta_perm.addr() == frame_to_meta(paddr)
    &&& regions.slots == old_regions.slots.remove(frame_to_index(paddr))
    &&& regions.slot_owners[frame_to_index(paddr)].raw_count
        == old_regions.slot_owners[frame_to_index(paddr)].raw_count
    &&& regions.slot_owners[frame_to_index(paddr)].usage
        == old_regions.slot_owners[frame_to_index(paddr)].usage
    &&& regions.slot_owners[frame_to_index(paddr)].path_if_in_pt
        == old_regions.slot_owners[frame_to_index(paddr)].path_if_in_pt
    &&& forall |i: usize| {
        i != frame_to_index(paddr)
            ==> regions.slot_owners[i] == old_regions.slot_owners[i]
    }
    &&& regions.inv()

}
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pub proof fn from_unused_owner(tracked regions: &mut MetaRegionOwners, paddr: Paddr, meta_perm: PointsTo<MetaSlot, Metadata<M>>, ) -> tracked res : Self

ensures
Self::from_unused_owner_spec(
    *old(regions),
    paddr,
    meta_perm.value().metadata,
    res,
    *regions,
),

Trait Implementations§

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impl<M: AnyFrameMeta + Repr<MetaSlotStorage> + OwnerOf> Inv for UniqueFrameOwner<M>

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open spec fn inv(self) -> bool

{
    &&& self.meta_perm.is_init()
    &&& self.meta_perm.wf(&self.meta_perm.inner_perms)
    &&& self.slot_index == frame_to_index(meta_to_frame(self.meta_perm.addr()))
    &&& self.slot_index < max_meta_slots()
    &&& (self.slot_index - FRAME_METADATA_RANGE.start) as usize % META_SLOT_SIZE == 0
    &&& self.meta_perm.addr()
        < FRAME_METADATA_RANGE.start + MAX_NR_PAGES * META_SLOT_SIZE
    &&& self.meta_perm.addr() == meta_addr(self.slot_index)
    &&& self.meta_perm.addr() == self.meta_perm.points_to.addr()
    &&& self.meta_perm.value().metadata.wf(self.meta_own)

}
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impl<M: AnyFrameMeta + Repr<MetaSlotStorage> + OwnerOf> InvView for UniqueFrameOwner<M>

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proof fn view_preserves_inv(self)

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impl<M: AnyFrameMeta + Repr<MetaSlotStorage> + OwnerOf> View for UniqueFrameOwner<M>

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open spec fn view(&self) -> Self::V

{
    UniqueFrameModel {
        meta: self.meta_own@,
    }
}
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type V = UniqueFrameModel<M>

Auto Trait Implementations§

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impl<M> Freeze for UniqueFrameOwner<M>
where <M as OwnerOf>::Owner: Freeze,

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impl<M> !RefUnwindSafe for UniqueFrameOwner<M>

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impl<M> Send for UniqueFrameOwner<M>
where <M as OwnerOf>::Owner: Send, M: Send,

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impl<M> Sync for UniqueFrameOwner<M>
where <M as OwnerOf>::Owner: Sync, M: Sync,

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impl<M> Unpin for UniqueFrameOwner<M>
where <M as OwnerOf>::Owner: Unpin, M: Unpin,

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impl<M> UnwindSafe for UniqueFrameOwner<M>
where <M as OwnerOf>::Owner: UnwindSafe, M: UnwindSafe,

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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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, VERUS_SPEC__A> FromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: From<T>,

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fn obeys_from_spec() -> bool

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fn from_spec(v: T) -> VERUS_SPEC__A

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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, VERUS_SPEC__A> IntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: Into<T>,

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fn obeys_into_spec() -> bool

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fn into_spec(self) -> T

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

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fn obeys_into_spec() -> bool

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fn into_spec(self) -> U

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

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type Error = Infallible

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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, VERUS_SPEC__A> TryFromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryFrom<T>,

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fn obeys_try_from_spec() -> bool

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fn try_from_spec( v: T, ) -> Result<VERUS_SPEC__A, <VERUS_SPEC__A as TryFrom<T>>::Error>

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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

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Performs the conversion.
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impl<T, VERUS_SPEC__A> TryIntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryInto<T>,

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fn obeys_try_into_spec() -> bool

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fn try_into_spec(self) -> Result<T, <VERUS_SPEC__A as TryInto<T>>::Error>

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impl<T, U> TryIntoSpecImpl<U> for T
where U: TryFrom<T>,

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fn obeys_try_into_spec() -> bool

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fn try_into_spec(self) -> Result<U, <U as TryFrom<T>>::Error>