Enum LockLevel 

#[repr(u8)]
pub enum LockLevel {
    None = 0,
    Shared = 1,
    Reserved = 2,
    Pending = 3,
    Exclusive = 4,
}

Lock level for database file locking (SQLite’s five-state lock).

Variants

None = 0

No lock held.

Shared = 1

Shared lock (reading).

Reserved = 2

Reserved lock (intending to write).

Pending = 3

Pending lock (waiting for shared locks to clear).

Exclusive = 4

Exclusive lock (writing).

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 Default for LockLevel

fn default() -> LockLevel

Returns the “default value” for a type.

impl Hash for LockLevel

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 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