Struct rustdb::pstore::AccessPagedData

pub struct AccessPagedData {
    pub writer: bool,
    pub time: u64,
    pub spd: Arc<SharedPagedData>,
}

Access to shared paged data.

Fields

writer: bool

time: u64

spd: Arc<SharedPagedData>

Implementations

impl AccessPagedData

pub fn new_reader(spd: Arc<SharedPagedData>) -> Self

Construct access to a virtual read-only copy of the database logical pages.

pub fn new_writer(spd: Arc<SharedPagedData>) -> Self

Construct access to the database logical pages.

pub fn get_page(&self, lpnum: u64) -> Data

Get the Data for the specified page.

pub fn set_page(&self, lpnum: u64, data: Data)

Set the data of the specified page.

pub fn is_new(&self) -> bool

Is the underlying file new (so needs to be initialised ).

pub fn compress(&self, size: usize, saving: usize) -> bool

Check whether compressing a page is worthwhile.

pub fn alloc_page(&self) -> u64

Allocate a logical page.

pub fn free_page(&self, lpnum: u64)

Free a logical page.

pub fn save(&self, op: SaveOp) -> usize

Commit changes to underlying file ( or rollback logical page allocations ).

Trait Implementations

impl Drop for AccessPagedData

fn drop(&mut self)

Executes the destructor for this type.