Struct BufferManager 

pub struct BufferManager { /* private fields */ }

The buffer manager manages a pool of frames with a Clock eviction policy.

Implementations

impl BufferManager

pub fn new( db_path: PathBuf, memory_manager: Arc<MemoryManager>, config: BufferManagerConfig, ) -> Self

pub fn stats(&self) -> &BufferManagerStats

pub fn page_size(&self) -> usize

pub fn num_frames(&self) -> usize

pub fn is_file_registered(&self, name: &str) -> bool

Check if a file is already registered with the buffer manager.

pub fn register_file(&mut self, name: &str, path: PathBuf)

Register a database file with the buffer manager.

pub fn pin(&mut self, file_name: &str, page_num: PageNum) -> Result<Frame>

Pin a page: bring it into the buffer pool if not already present.

pub fn pin_mut( &mut self, file_name: &str, page_num: PageNum, ) -> Result<&mut Frame>

Pin a page and get mutable access.

pub fn unpin(&mut self, file_name: &str, page_num: PageNum)

Unpin a page (requires file_name for composite key lookup).

pub fn flush(&mut self, file_name: &str, page_num: PageNum) -> Result<()>

Flush a dirty page to disk.

pub fn flush_all(&mut self) -> Result<()>

Flush all dirty pages to disk.

pub fn dirty_page_nums_for_file(&self, file_name: &str) -> Vec<PageNum>

Return all dirty page numbers belonging to a specific file.

pub fn drop_file(&mut self, file_name: &str)

Drop all state for a file: cached frames, registration, mmap region, and sequential-access tracking. Used when a file is deleted or rebuilt from scratch (e.g. a full persistence-mirror rewrite) so stale frames are not re-read under the same file name.

pub fn numa_info(&self) -> &NumaInfo

Access the NUMA topology info.

Trait Implementations

impl Debug for BufferManager

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

Formats the value using the given formatter.