Struct FileSpaceInfo 

#[non_exhaustive]
pub struct FileSpaceInfo {
    pub strategy: FileSpaceStrategy,
    pub persist: bool,
    pub threshold: u64,
    pub page_size: u64,
    pub page_end_meta_threshold: u16,
    pub eoa_pre_fsm: u64,
    pub manager_addrs: Vec<u64>,
}

A parsed (or to-be-written) File Space Info message.

Non-exhaustive: read through File::file_space_info, never constructed by a caller — set a file’s strategy with FileBuilder::with_file_space_strategy. Fields may be added as the format message grows.

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.

strategy: FileSpaceStrategy

The file-space management strategy.

persist: bool

Whether free space is persisted to disk across file close (the manager addresses below are written only when this is set).

threshold: u64

Smallest free-space section size the managers track.

page_size: u64

File-space page size used for paged allocation.

page_end_meta_threshold: u16

Page-end metadata threshold (paged allocation tuning).

eoa_pre_fsm: u64

End-of-allocation address recorded before free-space manager metadata was allocated; u64::MAX when free space is not persisted.

manager_addrs: Vec<u64>

Free-space manager header addresses (present only when persist is set); unused slots are u64::MAX. Followed to their on-disk FSHD/ FSSE blocks by File::persisted_free_space.

Trait Implementations

impl Clone for FileSpaceInfo

fn clone(&self) -> FileSpaceInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FileSpaceInfo

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

Formats the value using the given formatter.

impl Eq for FileSpaceInfo

impl PartialEq for FileSpaceInfo

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FileSpaceInfo