Struct PageCache 

pub struct PageCache<FS: FileSystem>(pub Arc<PageCacheInner<FS>>);

A reference-counted handle to the page cache.

PageCache wraps an [Arc] around PageCacheInner, allowing safe sharing across multiple threads. It provides methods to construct a cache and to read pages with read-ahead support.

Tuple Fields

0: Arc<PageCacheInner<FS>>

Implementations

impl<FS: FileSystem> PageCache<FS>

pub fn new(fs: FS) -> Self

Create a new page cache associated with the given file system.

Spawns a background thread to service read-ahead requests.

pub fn read( &self, file: &RegularFile, fba: FileBlockNumber, buf: &mut [u8; 4096], ) -> Result<bool, KernelError>

Read a page from the cache or underlying file system.

A read-ahead request for subsequent pages is issued to the background thread.

Trait Implementations

impl<FS: FileSystem> Clone for PageCache<FS>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<FS: FileSystem + 'static> FileSystem for PageCache<FS>

fn root(&self) -> Option<Directory>

Retrieves the root directory of the filesystem.