Struct AutoDisk 

#[non_exhaustive]
pub struct AutoDisk {
    pub percent: u8,
    pub ceiling: u64,
}

The automatic disk budget: a share of what the cache could occupy (its own bytes plus the free space), at most a ceiling, and never more than leaves auto_disk_reserve free.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

percent: u8

Share of (free space + the cache’s own bytes), in percent.

ceiling: u64

Upper bound, in bytes.

Implementations

impl AutoDisk

pub const PERCENT: u8 = 20

Default share of the room.

pub const CEILING: u64

Default ceiling: large enough for the inflated DEX of a phone’s worth of APKs (416 system and store APKs: 8.6 GB).

pub fn new(percent: u8, ceiling: u64) -> AutoDisk

percent of the room, at most ceiling bytes.

pub fn bytes_for(&self, space: Option<(u64, u64)>, used: u64) -> u64

The budget for a cache holding used bytes on a file system with (free, total) bytes (None: unknown, e.g. on Windows, giving AUTO_DISK_UNKNOWN). When the disk is already below the reserve, the last bound falls under used, so eviction gives the shortfall back. (No separate floor: with a reserve of at least 1 GiB, the reserve is always the tighter bound on a disk too small for 20 % to reach 256 MiB.)

Trait Implementations

impl Clone for AutoDisk

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AutoDisk

impl Debug for AutoDisk

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

Formats the value using the given formatter.

impl Default for AutoDisk

fn default() -> AutoDisk

Returns the “default value” for a type.

impl Eq for AutoDisk

impl PartialEq for AutoDisk

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AutoDisk