Struct Extent 

pub struct Extent {
    pub start: BlockId,
    pub count: u32,
}

A contiguous range of blocks: [start, start + count).

Extents are the unit of allocation and free-list tracking. Each segment’s data is stored as one or more extents in the segment directory.

See [[architecture-storage-format#Extent Tracking]].

Fields

start: BlockId

First block in the range.

count: u32

Number of contiguous blocks.

Implementations

impl Extent

pub const fn new(start: BlockId, count: u32) -> Self

pub const fn end(&self) -> BlockId

One past the last block in the extent.

pub const fn byte_len(&self) -> u64

Total bytes covered by this extent.

pub const fn is_adjacent_to(&self, other: &Extent) -> bool

Whether this extent is immediately followed by other.

Trait Implementations

impl Clone for Extent

fn clone(&self) -> Extent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Extent

impl Debug for Extent

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

Formats the value using the given formatter.

impl Display for Extent

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

Formats the value using the given formatter.

impl Eq for Extent

impl PartialEq for Extent

fn eq(&self, other: &Extent) -> 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 StructuralPartialEq for Extent