Struct datafusion::execution::memory_pool::MemoryReservation

pub struct MemoryReservation { /* private fields */ }

A MemoryReservation tracks a reservation of memory in a MemoryPool that is freed back to the pool on drop

Implementations

impl MemoryReservation

pub fn size(&self) -> usize

Returns the size of this reservation in bytes

pub fn free(&mut self) -> usize

Frees all bytes from this reservation returning the number of bytes freed

pub fn shrink(&mut self, capacity: usize)

Frees capacity bytes from this reservation

Panics

Panics if capacity exceeds Self::size

pub fn resize(&mut self, capacity: usize)

Sets the size of this reservation to capacity

pub fn grow(&mut self, capacity: usize)

Increase the size of this reservation by capacity bytes

pub fn try_grow(&mut self, capacity: usize) -> Result<(), DataFusionError>

Try to increase the size of this reservation by capacity bytes

Trait Implementations

impl Debug for MemoryReservation

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

Formats the value using the given formatter.

impl Drop for MemoryReservation

fn drop(&mut self)

Executes the destructor for this type.

impl From<MemoryReservation> for SharedMemoryReservation

fn from(reservation: MemoryReservation) -> SharedMemoryReservation

Creates new SharedMemoryReservation from MemoryReservation