Struct CachedFileSize 

pub struct CachedFileSize(/* private fields */);

A cached file size.

This wraps an atomic u64 to allow setting the cached file size without needed a mutable reference.

Zero is interpreted as unknown.

Implementations

impl CachedFileSize

pub fn new(size: u64) -> Self

Create a CachedFileSize from a raw byte count.

Passing 0 is equivalent to calling unknown: the type interprets zero as “size not yet known”.

pub fn unknown() -> Self

pub fn get(&self) -> Option<NonZero<u64>>

pub fn set(&self, size: NonZero<u64>)

Trait Implementations

impl Clone for CachedFileSize

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CachedFileSize

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

Formats the value using the given formatter.

impl DeepSizeOf for CachedFileSize

fn deep_size_of_children(&self, __context: &mut Context) -> usize

fn deep_size_of(&self) -> usize

impl Default for CachedFileSize

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CachedFileSize

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for CachedFileSize

impl From<Option<NonZero<u64>>> for CachedFileSize

fn from(size: Option<NonZero<u64>>) -> Self

Converts to this type from the input type.

impl PartialEq for CachedFileSize

fn eq(&self, other: &Self) -> 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 Serialize for CachedFileSize

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.