Struct Pager 

pub struct Pager { /* private fields */ }

Implementations

impl Pager

Pager handles page requests. It is a per-volume object.

pub fn new(scope: ExecutionScope) -> Result<Self, Error>

Creates a new pager.

pub fn set_recorder(&self, recorder: Option<Box<dyn Recorder>>)

Set the current profile recorder, or set to None to not record.

pub fn recorder(&self) -> MutexGuard<'_, Option<Box<dyn Recorder>>>

Borrow the profile recorder. Used to record file opens.

pub fn record_page_in<P: PagerBacked>(&self, node: Arc<P>, range: Range<u64>)

Record a range into a profile if one is being recorded.

pub fn create_vmo<T: PagerBacked>( &self, file: Weak<T>, initial_size: u64, vmo_options: VmoOptions, ) -> Result<(Vmo, PagerPacketReceiverRegistration<T>), Error>

Creates a new VMO to be used with the pager.

pub fn watch_for_zero_children( &self, file: &impl PagerBacked, ) -> Result<bool, Error>

Starts watching for the VMO_ZERO_CHILDREN signal on file’s vmo. Returns false if the signal is already being watched for. When the pager receives the VMO_ZERO_CHILDREN signal PagerBacked::on_zero_children will be called.

pub fn writeback_begin( &self, vmo: &Vmo, range: Range<u64>, options: PagerWritebackBeginOptions, )

Notifies the kernel that the filesystem has started cleaning the range of pages. See ZX_PAGER_OP_WRITEBACK_BEGIN for more information.

pub fn writeback_end(&self, vmo: &Vmo, range: Range<u64>)

Notifies the kernel that the filesystem has finished cleaning the range of pages. See ZX_PAGER_OP_WRITEBACK_END for more information.

pub fn query_dirty_ranges( &self, vmo: &Vmo, range: Range<u64>, buffer: &mut [VmoDirtyRange], ) -> Result<(usize, usize), Status>

Queries the vmo for ranges that are dirty within range. Returns (num_returned, num_remaining) where num_returned is the number of objects populated in buffer and num_remaining is the number of dirty ranges remaining in range that could not fit in buffer. See zx_pager_query_dirty_ranges for more information.

pub fn query_vmo_stats( &self, vmo: &Vmo, options: PagerVmoStatsOptions, ) -> Result<PagerVmoStats, Status>

Queries the vmo for any pager related statistics. If PagerVmoStatsOptions::RESET_VMO_STATS is passed then the stats will also be reset. See zx_pager_query_vmo_stats for more information.

pub async fn page_in_barrier()