Struct Frame 

pub struct Frame {
    pub page_num: PageNum,
    pub pin_count: u32,
    pub is_dirty: bool,
    pub clock_ref: bool,
    pub data: Vec<u8>,
    pub numa_node: u32,
}

A frame in the buffer pool holding a cached page.

Fields

page_num: PageNum

The page number this frame holds.

pin_count: u32

Reference count (number of pins).

is_dirty: bool

Whether the page has been modified since loading.

clock_ref: bool

Clock hand flag for Clock eviction policy.

data: Vec<u8>

The actual page data.

numa_node: u32

NUMA node this frame resides on (0 = unknown / single-node).

Implementations

impl Frame

pub fn new(page_num: PageNum, data: Vec<u8>) -> Self

pub fn pin(&mut self)

Pin the frame (increment reference count).

pub fn unpin(&mut self)

Unpin the frame (decrement reference count).

pub fn is_pinned(&self) -> bool

Check if the frame is pinned (in use).

pub fn mark_dirty(&mut self)

Mark frame as dirty (modified).

Trait Implementations

impl Clone for Frame

fn clone(&self) -> Frame

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Frame

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

Formats the value using the given formatter.