Trait txn_core::sync::Cm

pub trait Cm: Sized {
    type Error: Error;
    type Key;
    type Options;

    // Required methods
    fn new(options: Self::Options) -> Result<Self, Self::Error>;
    fn mark_read(&mut self, key: &Self::Key);
    fn mark_conflict(&mut self, key: &Self::Key);
    fn has_conflict(&self, other: &Self) -> bool;
    fn rollback(&mut self) -> Result<(), Self::Error>;
}

The conflict manager that can be used to manage the conflicts in a transaction.

The conflict normally needs to have:

1. Contains fingerprints of keys read.
2. Contains fingerprints of keys written. This is used for conflict detection.

Required Associated Types

type Error: Error

The error type returned by the conflict manager.

type Key

The key type.

type Options

The options type used to create the conflict manager.

Required Methods

fn new(options: Self::Options) -> Result<Self, Self::Error>

Create a new conflict manager with the given options.

fn mark_read(&mut self, key: &Self::Key)

Mark the key is read.

fn mark_conflict(&mut self, key: &Self::Key)

Mark the key is .

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

Returns true if we have a conflict.

fn rollback(&mut self) -> Result<(), Self::Error>

Rollback the conflict manager.

Object Safety

This trait is not object safe.

Implementors

impl<K> Cm for BTreeCm<K>

where K: CheapClone + Ord,

type Error = Infallible

type Key = K

type Options = Option<usize>

impl<K, S> Cm for HashCm<K, S>

where S: BuildHasher, K: Hash + Eq,

type Error = Infallible

type Key = K

type Options = HashCmOptions<S>