Struct concread::cowcell::asynch::CowCellWriteTxn

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

A CowCell Write Transaction handle.

This allows mutation of the content of the CowCell without blocking or affecting current readers.

Changes are only stored in this structure until you call commit. To abort/ rollback a change, don’t call commit and allow the write transaction to be dropped. This causes the CowCell to unlock allowing the next writer to proceed.

Implementations

impl<T> CowCellWriteTxn<'_, T>

where T: Clone,

pub fn get_mut(&mut self) -> &mut T

Access a mutable pointer of the data in the CowCell. This data is only visible to the write transaction object in this thread, until you call commit().

pub fn replace(&mut self, value: T)

Update the inner value with a new one. This function exists to prevent a clone in the case where you take a read transaction and would otherwise use mem::swap

pub fn commit(self)

Commit the changes made in this write transactions to the CowCell. This will consume the transaction so no further changes can be made after this is called. Not calling this in a block, is equivalent to an abort/rollback of the transaction.

Trait Implementations

impl<T> Deref for CowCellWriteTxn<'_, T>

where T: Clone,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T> DerefMut for CowCellWriteTxn<'_, T>

where T: Clone,

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

Mutably dereferences the value.