Enum pagecache::CacheEntry

pub enum CacheEntry<M: Send> {
    MergedResident(M, u64, Lsn, DiskPtr),
    Resident(M, u64, Lsn, DiskPtr),
    PartialFlush(u64, Lsn, DiskPtr),
    Flush(u64, Lsn, DiskPtr),
    Free(u64, Lsn, DiskPtr),
    Counter(usize, u64, Lsn, DiskPtr),
    Meta(Meta, u64, Lsn, DiskPtr),
}

Points to either a memory location or a disk location to page-in data from.

Variants

MergedResident(M, u64, Lsn, DiskPtr)

A cache item that contains the most recent fully-merged page state, also in secondary storage.

Resident(M, u64, Lsn, DiskPtr)

A cache item that is in memory, and also in secondary storage.

PartialFlush(u64, Lsn, DiskPtr)

A cache item that is present in secondary storage.

Flush(u64, Lsn, DiskPtr)

A cache item that is present in secondary storage, and is the base segment of a page.

Free(u64, Lsn, DiskPtr)

A freed page tombstone.

Counter(usize, u64, Lsn, DiskPtr)

The persisted counter page

Meta(Meta, u64, Lsn, DiskPtr)

The persisted meta page

Trait Implementations

impl<M: PartialEq + Send> PartialEq<CacheEntry<M>> for CacheEntry<M>

fn eq(&self, other: &CacheEntry<M>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &CacheEntry<M>) -> bool

This method tests for !=.

impl<M: Clone + Send> Clone for CacheEntry<M>

fn clone(&self) -> CacheEntry<M>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<M: Debug + Send> Debug for CacheEntry<M>

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

Formats the value using the given formatter.