Struct FileIdentity 

pub struct FileIdentity { /* private fields */ }

Opaque identity of an already-open filesystem object.

Identities are intended only as opaque comparison keys while the relevant file handles remain open. Their ordering carries no filesystem meaning; it exists only for ordered collections. They are not persistent database identifiers and must not be serialized or compared across machines or boots.

Implementations

impl FileIdentity

pub fn from_file(file: &File) -> Result<Option<FileIdentity>, Error>

Read the identity of an independently opened filesystem descriptor.

On Unix this uses descriptor metadata (st_dev, st_ino). On Windows it uses the volume serial number and full 128-bit file identifier associated with the open handle. A later rename or pathname replacement therefore does not change the result. Platforms without a stable descriptor identity exposed by this crate return Ok(None).

Trait Implementations

impl Clone for FileIdentity

fn clone(&self) -> FileIdentity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FileIdentity

impl Debug for FileIdentity

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

Formats the value using the given formatter.

impl Eq for FileIdentity

impl Hash for FileIdentity

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for FileIdentity

fn cmp(&self, other: &FileIdentity) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for FileIdentity

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for FileIdentity

fn partial_cmp(&self, other: &FileIdentity) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for FileIdentity