Struct Reservation 

pub struct Reservation { /* private fields */ }

RAII memory reservation: releases its bytes back to the governor on drop.

Two words plus one Arc refcount — no allocation. Send/Sync, so a reservation can move across threads and live inside async tasks. Leaking a reservation (mem::forget) leaks its accounting but is memory-safe.

Implementations

impl Reservation

pub fn class(&self) -> MemoryClass

The class this reservation charged.

pub fn bytes(&self) -> u64

The bytes currently held.

pub fn resize(&mut self, new_bytes: u64) -> Result<(), MemoryError>

Resizes the reservation. Shrinking always succeeds; growth goes through the same admission rules as try_reserve and leaves the reservation unchanged on failure.

Trait Implementations

impl Debug for Reservation

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

Formats the value using the given formatter.

impl Drop for Reservation

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.