Struct rustdb::dividedstg::DividedStg

pub struct DividedStg {
    pub bs: BlockStg,
    pub blk_cap: u64,
    /* private fields */
}

Divides Storage into sub-files of arbitrary size using BlockStg.

Fields

bs: BlockStg

Underlying block storage.

blk_cap: u64

Block capacity.

Implementations

impl DividedStg

pub fn new(stg: Box<dyn Storage>, blk_cap: u64) -> Self

Construct DividedStg from specified Storage and block capacity.

pub fn new_file(&mut self) -> FD

Get file descriptor for a new file.

pub fn drop_file(&mut self, f: &mut FD)

Drop specified file.

pub fn truncate(&mut self, f: &mut FD, size: u64)

Free blocks not required for file of specified size.

pub fn write(&mut self, f: &mut FD, offset: u64, data: &[u8])

Write data to specified file at specified offset.

pub fn write_data(&mut self, f: &mut FD, offset: u64, data: Data, n: usize)

Write Data to specified file at specified offset.

pub fn read(&self, f: &FD, offset: u64, data: &mut [u8])

Read data from file at specified offset.

pub fn save_fd(&self, fd: &FD, buf: &mut [u8])

Save fd to byte buffer.

pub fn load_fd(&self, buf: &[u8]) -> FD

Load fd from byte buffer.

pub fn set_root(&mut self, fd: &FD)

Set root file descriptor.

pub fn get_root(&self) -> FD

Get root file descriptor.

pub fn save(&mut self)

Save files to backing storage.

pub fn wait_complete(&self)

Wait for save to complete.