Guards

ostd::specs::mm::page_table::node

Struct Guards 

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pub struct Guards<'rcu, C: PageTableConfig> {
    pub guards: Map<usize, Option<GuardPerm<'rcu, C>>>,
}

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§guards: Map<usize, Option<GuardPerm<'rcu, C>>>

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impl<'rcu, C: PageTableConfig> Guards<'rcu, C>

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pub open spec fn locked(self, addr: usize) -> bool

{ self.guards.contains_key(addr) }
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pub open spec fn unlocked(self, addr: usize) -> bool

{ !self.guards.contains_key(addr) }
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pub open spec fn lock_held(self, addr: usize) -> bool

{ self.guards.contains_key(addr) && self.guards[addr] is None }
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pub proof fn take(tracked &mut self, addr: usize) -> tracked guard : GuardPerm<'rcu, C>

requires
old(self).locked(addr),
old(self).guards[addr] is Some,
ensures
self.lock_held(addr),
guard == old(self).guards[addr].unwrap(),
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pub proof fn put(tracked &mut self, addr: usize, tracked guard: GuardPerm<'rcu, C>)

requires
old(self).lock_held(addr),
ensures
self.locked(addr),
self.guards[addr] == Some(guard),

Auto Trait Implementations§

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impl<'rcu, C> Freeze for Guards<'rcu, C>

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impl<'rcu, C> !RefUnwindSafe for Guards<'rcu, C>

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impl<'rcu, C> Send for Guards<'rcu, C>

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impl<'rcu, C> Sync for Guards<'rcu, C>

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impl<'rcu, C> Unpin for Guards<'rcu, C>
where C: Unpin,

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impl<'rcu, C> !UnwindSafe for Guards<'rcu, C>

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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

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, 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

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.
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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>