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BinEntry

Struct BinEntry 

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pub struct BinEntry {
    pub data: Option<Vec<u8>>,
    pub known_deleted: bool,
    pub dirty: bool,
    pub expiration_time: u32,
}
Expand description

Entry in a BIN node.

T-3: the per-slot lsn (8 bytes) that used to live here was hoisted to the node-level BinStub.lsn_rep (IN.entryLsnByteArray); access the LSN for slot i via BinStub::get_lsn(i) / set_lsn(i, lsn).

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§data: Option<Vec<u8>>

Optional embedded data (for small records) or cached LN.

§known_deleted: bool

True when this slot has been marked known-deleted (analogous to the KNOWN_DELETED_BIT in IN.entryStates). The slot is eligible for removal by compress_bin().

§dirty: bool

True when this slot has been modified since the last full BIN log write.

IN.entryStates[i] & IN_DIRTY_BIT. Used by the checkpoint path to decide whether to write a BIN-delta (few dirty slots) or a full BIN (many dirty slots).

§expiration_time: u32

Packed expiration time (0 = no expiration).

When the owning BinStub.expiration_in_hours is true, this value is hours since Unix epoch; otherwise it is seconds since Unix epoch.

IN.entryExpiration.

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impl Clone for BinEntry

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fn clone(&self) -> BinEntry

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for BinEntry

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.