Struct UpdateGuard

pub struct UpdateGuard<'a, T: 'a> { /* private fields */ }

A RAII guard providing mutable access to the inactive value of a PairLock, The values becomes active when the guard is dropped.

Implementations

impl<'a, T> UpdateGuard<'a, T>

pub fn active(this: &Self) -> &T

Returns a shared reference to the active value of the PairLock.

It can not be mutate it while the PairLock is locked, and is therefore safe to read.

pub fn both(this: &mut Self) -> (&mut T, &T)

Returns references to both the inactive (mutable) and active value of the PairLock.

pub fn cancel(this: Self)

Aborts the update by releasing the lock without making the mutable value active.

Any changes made to the inactive value will however be visible to the next .update() or .replace().

Trait Implementations

impl<'a, T: Debug> Debug for UpdateGuard<'a, T>

fn fmt(&self, fmtr: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a, T> Deref for UpdateGuard<'a, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<'a, T> DerefMut for UpdateGuard<'a, T>

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

Mutably dereferences the value.

impl<'a, T> Drop for UpdateGuard<'a, T>

fn drop(&mut self)

Makes the value active and releases the update lock

impl<'a, T> PartialEq for UpdateGuard<'a, T>

fn eq(&self, other: &Self) -> bool

Convenience impl for comparing Results containing this type.

Only compares equal against itself (ptr::eq(self, other)).

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.