Enum LockLevel

pub enum LockLevel {
    Unlocked,
    Shared,
    Reserved,
    Pending,
    Exclusive,
}

Represents one of the 5 SQLite locking levels. See SQLite documentation for more information.

Variants

Unlocked

No locks are held; the database may be neither read nor written.

Shared

The database may be read but not written. Multiple Shared locks can coexist at once.

Reserved

A shared lock with the intention to upgrade to an exclusive lock. Only one Reserved lock can exist at once.

Pending

A lock in the process of upgrading to a reserved lock. Can coexist with Shared locks, but no new shared locks can be taken.

Exclusive

The database may be read or written, but no other locks can be held.

Trait Implementations

impl Clone for LockLevel

fn clone(&self) -> LockLevel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LockLevel

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

Formats the value using the given formatter.

impl From<i32> for LockLevel

fn from(lock: i32) -> Self

Converts to this type from the input type.

impl Ord for LockLevel

fn cmp(&self, other: &LockLevel) -> 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 LockLevel

fn eq(&self, other: &LockLevel) -> 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 LockLevel

fn partial_cmp(&self, other: &LockLevel) -> 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 Copy for LockLevel

impl Eq for LockLevel

impl StructuralPartialEq for LockLevel