Enum pagecache::PageGet

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

Expand description

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.

Implementations

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

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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.

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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.

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pub fn is_materialized(&self) -> bool

Returns true if the PageGet is Materialized.

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pub fn is_free(&self) -> bool

Returns true if the PageGet is Free.

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pub fn is_allocated(&self) -> bool

Returns true if the PageGet is Allocated.

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pub fn is_unallocated(&self) -> bool

Returns true if the PageGet is Unallocated.

Trait Implementations

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

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

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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

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

Formats the value using the given formatter. Read more

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

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

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

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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

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

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

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

Auto Trait Implementations

impl<'a, PageFrag> RefUnwindSafe for PageGet<'a, PageFrag>where
PageFrag: RefUnwindSafe,

impl<'a, PageFrag> Unpin for PageGet<'a, PageFrag>

impl<'a, PageFrag> UnwindSafe for PageGet<'a, PageFrag>where
PageFrag: RefUnwindSafe,

Blanket Implementations

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · 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.

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Enum pagecache::PageGet

Variants

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

Free(PagePtr<'a, PageFrag>)

Allocated

Unallocated

Implementations

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

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

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

pub fn is_materialized(&self) -> bool

pub fn is_free(&self) -> bool

pub fn is_allocated(&self) -> bool

pub fn is_unallocated(&self) -> bool

Trait Implementations

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

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

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

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

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

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

fn ne(&self, other: &Rhs) -> bool

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

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

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

Auto Trait Implementations

impl<'a, PageFrag> RefUnwindSafe for PageGet<'a, PageFrag>where PageFrag: RefUnwindSafe,

impl<'a, PageFrag> Unpin for PageGet<'a, PageFrag>

impl<'a, PageFrag> UnwindSafe for PageGet<'a, PageFrag>where PageFrag: RefUnwindSafe,

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

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

type Error = Infallible

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

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

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

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

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

`Free(PagePtr<'a, PageFrag>)`

`Allocated`

`Unallocated`

impl<'a, P> 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,

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

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

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

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

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

impl<'a, PageFrag> RefUnwindSafe for PageGet<'a, PageFrag>where
PageFrag: RefUnwindSafe,

impl<'a, PageFrag> UnwindSafe for PageGet<'a, PageFrag>where
PageFrag: RefUnwindSafe,

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

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

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

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

impl<T> ToOwned for Twhere
T: Clone,

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

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