Enum pagecache::PageGet

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

The result of a get call in the PageCache.

Variants

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

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

Free

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, 

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

unwraps the PageGet into its inner Materialized form.

Panics

Panics if it is a variant other than Materialized.

fn is_materialized(&self) -> bool

Returns true if the PageGet is Materialized.

fn is_free(&self) -> bool

Returns true if the PageGet is Free.

fn is_allocated(&self) -> bool

Returns true if the PageGet is Allocated.

fn is_unallocated(&self) -> bool

Returns true if the PageGet is Unallocated.

Trait Implementations

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, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

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

fn eq(&self, __arg_0: &PageGet<'a, PageFrag>) -> bool

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

fn ne(&self, __arg_0: &PageGet<'a, PageFrag>) -> bool

This method tests for !=.

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,