Struct netstack3_core::sync::WeakRc
source · pub struct WeakRc<T>(/* private fields */);
Expand description
A weakly-held reference.
Similar to an alloc::sync::Weak
.
A Weak
does not make any claim to the live-ness of the underlying data.
Holders of a Weak
must attempt to upgrade to a Strong
through
Weak::upgrade
to access the underlying data.
Note that Weak
’s implementation of Hash
and PartialEq
operate on
the pointer itself and not the underlying data.
Implementations§
source§impl<T> Weak<T>
impl<T> Weak<T>
sourcepub fn ptr_eq(&self, _: &Weak<T>) -> bool
pub fn ptr_eq(&self, _: &Weak<T>) -> bool
Returns true if the two pointers point to the same allocation.
sourcepub fn debug_id(&self) -> impl Debug
pub fn debug_id(&self) -> impl Debug
Returns core::fmt::Debug
implementation that is stable and unique
for the data held behind this Weak
.
sourcepub fn upgrade(&self) -> Option<Strong<T>>
pub fn upgrade(&self) -> Option<Strong<T>>
Attempts to upgrade to a Strong
.
Returns None
if the inner value has since been marked for destruction.
sourcepub fn debug_references(&self) -> DebugReferences<T>
pub fn debug_references(&self) -> DebugReferences<T>
Creates a DebugReferences
instance.
Trait Implementations§
source§impl<T> PartialEq for Weak<T>
impl<T> PartialEq for Weak<T>
impl<T> Eq for Weak<T>
Auto Trait Implementations§
impl<T> Freeze for Weak<T>
impl<T> RefUnwindSafe for Weak<T>where
T: RefUnwindSafe,
impl<T> Send for Weak<T>
impl<T> Sync for Weak<T>
impl<T> Unpin for Weak<T>
impl<T> UnwindSafe for Weak<T>where
T: RefUnwindSafe,
Blanket Implementations§
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