Struct DiskQuota 

pub struct DiskQuota { /* private fields */ }

A byte budget for the files in one VFS.

Implementations

impl DiskQuota

pub fn new(limit: u64, used: u64) -> Self

pub fn unmeasured(limit: u64) -> Self

A budget for a directory whose usage is unknown: every write that grows it is refused.

pub fn limit(&self) -> u64

pub fn used(&self) -> u64

pub fn set_used(&self, bytes: u64)

Replace measured usage while the caller exclusively owns the volume and no outstanding reservations can change this counter.

pub fn is_unmeasured(&self) -> bool

pub fn reserve(&self, bytes: u64) -> Result<(), QuotaExceeded>

Claim bytes, or refuse without claiming anything when they don’t fit. Claiming nothing always succeeds, so a write that doesn’t grow the files works even in a directory already over its limit.

pub fn record(&self, bytes: u64)

Count bytes already on disk, whether or not they fit: they are there.

pub fn release(&self, bytes: u64)

pub fn hold( self: &Arc<Self>, file: FileIdentity, holder: Holder, ) -> OpenFileGuard

Hold file open until the returned guard drops.

pub fn is_held(&self, file: FileIdentity) -> bool

Whether a reader or writer holds file open, so its bytes outlive its name.

pub fn release_file(&self, file: FileIdentity, bytes: u64)

A regular file’s name was removed or replaced: free its bytes now, or when the last reader holding it closes. A writer’s own file is left for the writer to settle.

Trait Implementations

impl Debug for DiskQuota

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

Formats the value using the given formatter.