Struct rustdb::pstore::Stash

pub struct Stash {
    pub time: u64,
    pub pages: FxHashMap<u64, PageInfoPtr>,
    pub rdrs: BTreeMap<u64, usize>,
    pub vers: BTreeMap<u64, FxHashSet<u64>>,
    pub total: i64,
    pub mem_limit: usize,
    pub min: GHeap<u64, u64, u32>,
    pub read: u64,
    pub miss: u64,
}

Expand description

Central store of data.

Fields§

§time: u64

Write time - number of writes.

§pages: FxHashMap<u64, PageInfoPtr>

Page number -> page info.

§rdrs: BTreeMap<u64, usize>

Time -> reader count. Number of readers for given time.

§vers: BTreeMap<u64, FxHashSet<u64>>

Time -> set of page numbers. Page copies held for given time.

§total: i64

Total size of current pages.

§mem_limit: usize

trim_cache reduces total to mem_limit (or below).

§min: GHeap<u64, u64, u32>

Tracks loaded page with smallest usage.

§read: u64

Total number of page accesses.

§miss: u64

Total number of misses ( data was not already loaded ).

Implementations§

impl Stash

pub fn cached(&self) -> usize

Return the number of pages currently cached.

Trait Implementations§

impl Default for Stash

fn default() -> Stash

Returns the “default value” for a type. Read more

Auto Trait Implementations§

impl Freeze for Stash

impl RefUnwindSafe for Stash

impl Send for Stash

impl Sync for Stash

impl Unpin for Stash

impl UnwindSafe for Stash

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.