Struct TxnId 

pub struct TxnId(/* private fields */);

Identifies the transaction that owns a lock request.

The lock manager uses this only for equality and hashing: it tracks which requests belong together so a transaction can re-acquire, upgrade, or release its own locks. Reusing a retired id for a new transaction is safe as long as the previous transaction has released everything first.

Examples

use lock_db::TxnId;

let t = TxnId::new(42);
assert_eq!(t.get(), 42);
assert_eq!(TxnId::from(42), t);

Implementations

impl TxnId

pub const fn new(id: u64) -> Self

Wraps a raw transaction number.

pub const fn get(self) -> u64

Returns the underlying number.

Trait Implementations

impl Clone for TxnId

fn clone(&self) -> TxnId

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TxnId

impl Debug for TxnId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TxnId

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for TxnId

impl From<TxnId> for u64

fn from(id: TxnId) -> Self

Converts to this type from the input type.

impl From<u64> for TxnId

fn from(id: u64) -> Self

Converts to this type from the input type.

impl Hash for TxnId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for TxnId

fn cmp(&self, other: &TxnId) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for TxnId

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for TxnId

fn partial_cmp(&self, other: &TxnId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for TxnId

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TxnId