Enum pagecache::PageGet

pub enum PageGet<'a, PageFrag> where
    PageFrag: 'static + DeserializeOwned + Serialize + Send + Sync,  {
    Materialized(&'a PageFrag, PagePtr<'a, PageFrag>),
    Free(PagePtr<'a, PageFrag>),
    Unallocated,
    Counter(usize, PagePtr<'a, PageFrag>),
    Meta(&'a Meta, PagePtr<'a, PageFrag>),
}

The result of a get call in the PageCache.

Variants

Materialized(&'a PageFrag, PagePtr<'a, PageFrag>)

This page contains data and has been prepared for presentation to the caller by the PageCache's Materializer.

Free(PagePtr<'a, PageFrag>)

This page has been Freed

Unallocated

This page has not been allocated yet.

Counter(usize, PagePtr<'a, PageFrag>)

This page contains the last persisted counter

Meta(&'a Meta, PagePtr<'a, PageFrag>)

This is the Meta page

Methods

impl<'a, P> PageGet<'a, P> where
    P: Debug + DeserializeOwned + Serialize + Send + Sync, 

pub fn unwrap(self) -> (&'a P, PagePtr<'a, P>)

unwraps the PageGet into its inner Materialized form.

Panics

Panics if it is a variant other than Materialized.

pub fn expect(self, msg: &str) -> (&'a P, PagePtr<'a, P>)

unwraps the PageGet into its inner Materialized form, or panics with the specified error message.

Panics

Panics if it is a variant other than Materialized.

pub fn is_materialized(&self) -> bool

Returns true if the PageGet is Materialized.

pub fn is_free(&self) -> bool

Returns true if the PageGet is Free.

pub fn is_unallocated(&self) -> bool

Returns true if the PageGet is Unallocated.

Trait Implementations

impl<'a, PageFrag: PartialEq> PartialEq<PageGet<'a, PageFrag>> for PageGet<'a, PageFrag> where
    PageFrag: 'static + DeserializeOwned + Serialize + Send + Sync, 

fn eq(&self, other: &PageGet<'a, PageFrag>) -> bool

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

fn ne(&self, other: &PageGet<'a, PageFrag>) -> bool

This method tests for !=.

impl<'a, P> Sync for PageGet<'a, P> where
    P: DeserializeOwned + Serialize + Send + Sync, 

impl<'a, PageFrag: Clone> Clone for PageGet<'a, PageFrag> where
    PageFrag: 'static + DeserializeOwned + Serialize + Send + Sync, 

fn clone(&self) -> PageGet<'a, PageFrag>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a, P> Send for PageGet<'a, P> where
    P: DeserializeOwned + Serialize + Send + Sync, 

impl<'a, PageFrag: Debug> Debug for PageGet<'a, PageFrag> where
    PageFrag: 'static + DeserializeOwned + Serialize + Send + Sync, 

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

Formats the value using the given formatter.