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>),
    Allocated,
    Unallocated,
}

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

Allocated

This page has been allocated, but will become Free after restarting the system unless some data gets written to it.

Unallocated

This page was never allocated.

Methods

impl<'a, P> PageGet<'a, P> where     P: 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: &'static 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_allocated(&self) -> bool

Returns true if the PageGet is Allocated.

pub fn is_unallocated(&self) -> bool

Returns true if the PageGet is Unallocated.

Trait Implementations

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

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

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, 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, 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.