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NoWal

reddb_engine::storage::pager

Struct NoWal

pub struct NoWal;

Expand description

A pager without a WAL may only publish pages whose LSN is zero.

Trait Implementations§

impl WalBarrier for NoWal

fn flush_until(&self, _lsn: u64) -> Result<()>

fn needs_page_image(&self, _page_id: u32) -> Result<bool>

A checkpoint host can preserve the first image of an existing page before the cache accepts an overwrite. Newly reserved pages need no undo.

fn capture_page_image(&self, _page: &Page) -> Result<()>

Must make the image durable before returning. The pager may evict the replacement immediately; recording only at flush time is too late.

fn reserve_pages(&self, _start: u32, _count: u32) -> Result<()>

Called before pages are removed from allocator ownership.

fn detach_free_pages(&self, _pages: &[u32]) -> Result<()>

Called before a persisted free-list trunk is detached from its head.

fn has_page_ownership_journal(&self) -> Result<bool>

True only while detached free IDs have durable recovery ownership. No-op callbacks must not authorize moving a whole trunk into RAM.

fn retire_pages(&self, _pages: &[u32]) -> Result<()>

Called before retired pages enter the free list.

Auto Trait Implementations§

impl Forget for NoWal

impl Freeze for NoWal

impl RefUnwindSafe for NoWal

impl Send for NoWal

impl Sync for NoWal

impl Unpin for NoWal

impl UnsafeUnpin for NoWal

impl UnwindSafe for NoWal

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

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> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

impl<T> Pointable for T

const ALIGN: usize

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

impl<T> Same for T

type Output = T

Should always be Self

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

type Error = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, !>

Performs the conversion.

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.

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

Performs the conversion.