Struct IMMetadata

pub struct IMMetadata<T: PolarsDataType>(/* private fields */);

An interiorally mutable Metadata

This is essentially a more convenient API around RwLock<Metadata>. This also allows it to be Clone.

Implementations

impl<'a, T: PolarsDataType + 'a> IMMetadata<T>

where Metadata<T>: MetadataTrait + 'a,

pub fn upcast(&'a self) -> &'a RwLock<dyn MetadataTrait + 'a>

Cast the IMMetadata to a trait object of MetadataTrait

pub fn boxed_upcast(&'a self) -> Box<dyn MetadataTrait + 'a>

Cast the IMMetadata to a boxed trait object of MetadataTrait

impl<T: PolarsDataType> IMMetadata<T>

pub const fn new(md: Metadata<T>) -> Self

pub fn try_read(&self) -> Option<RwLockReadGuard<'_, Metadata<T>>>

Try to grab a read guard to the Metadata, this fails if this blocks.

pub fn read(&self) -> RwLockReadGuard<'_, Metadata<T>>

Block to grab a read guard the Metadata

pub fn try_write(&self) -> Option<RwLockWriteGuard<'_, Metadata<T>>>

Try to grab a write guard to the Metadata, this fails if this blocks.

pub fn write(&self) -> RwLockWriteGuard<'_, Metadata<T>>

Block to grab a write guard the Metadata

pub fn take(self) -> Metadata<T>

Take the internal Metadata

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

Get the mutable to the internal Metadata

Trait Implementations

impl<T: PolarsDataType> Clone for IMMetadata<T>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: PolarsDataType> Default for IMMetadata<T>

fn default() -> Self

Returns the “default value” for a type.