Struct rustdb::pstore::GHeap

source · 
pub struct GHeap<K, T, U> {
    pub n: usize,
    pub free: usize,
    pub v: Vec<HeapNode<K, T, U>>,
}
Expand description

Heap for tracking least used page.

Fields§

§n: usize

Number of heap nodes, not including free nodes.

§free: usize

1 + Index of start of free list.

§v: Vec<HeapNode<K, T, U>>

Vector of heap nodes.

Implementations§

source§

impl<K, T, U> GHeap<K, T, U>
where K: Default + Ord + Copy, T: Default + Copy, U: Copy + Default + TryFrom<usize>, usize: TryFrom<U>,

source

pub fn insert(&mut self, id: T, key: K) -> U

Insert id into heap with specified key (usage). Result is index of heap node.

source

pub fn modify(&mut self, x: U, newkey: K)

Modify key of specified heap node.

source

pub fn pop(&mut self) -> T

Remove heap node with smallest key, returning the associated id. Note: index of heap node is no longer valid.

Trait Implementations§

source§

impl<K, T, U> Default for GHeap<K, T, U>
where K: Default, T: Default,

source§

fn default() -> Self

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

Auto Trait Implementations§

§

impl<K, T, U> RefUnwindSafe for GHeap<K, T, U>
where K: RefUnwindSafe, T: RefUnwindSafe, U: RefUnwindSafe,

§

impl<K, T, U> Send for GHeap<K, T, U>
where K: Send, T: Send, U: Send,

§

impl<K, T, U> Sync for GHeap<K, T, U>
where K: Sync, T: Sync, U: Sync,

§

impl<K, T, U> Unpin for GHeap<K, T, U>
where K: Unpin, T: Unpin, U: Unpin,

§

impl<K, T, U> UnwindSafe for GHeap<K, T, U>
where K: UnwindSafe, T: UnwindSafe, U: UnwindSafe,

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

source§

fn into(self) -> U

Calls U::from(self).

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

source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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.
source§

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

Performs the conversion.