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AlignedBlobBuf

Struct AlignedBlobBuf 

pub struct AlignedBlobBuf { /* private fields */ }
Expand description

A heap-allocated, 4 KB-aligned, PAGE_SIZE-byte buffer.

One per logical blob in flight. Cheap to construct (single alloc), cheap to clone (single memcpy). Send + Sync — the raw pointer is the sole owner of its allocation.

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impl AlignedBlobBuf

pub fn zeroed() -> Self

Allocate a zero-filled buffer.

pub fn uninit() -> Self

Allocate an uninitialized buffer. Caller must fill before reading (typical use: io_uring read fills it from disk).

pub fn as_ptr(&self) -> *const u8

Raw pointer for FFI / io_uring iovec. Always non-null, always 4 KB-aligned, always PAGE_SIZE bytes valid.

pub fn as_mut_ptr(&mut self) -> *mut u8

Mutable raw pointer. Same invariants as Self::as_ptr.

pub fn as_slice(&self) -> &[u8]

Read-only view as a slice of PAGE_SIZE bytes.

pub fn as_mut_slice(&mut self) -> &mut [u8]

Mutable view as a slice of PAGE_SIZE bytes.

pub const fn len(&self) -> usize

Length in bytes — always PAGE_SIZE (512 KB).

pub const fn is_empty(&self) -> bool

true if len() == 0 — always false; here for clippy.

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impl Clone for AlignedBlobBuf

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fn clone(&self) -> Self

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 AlignedBlobBuf

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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 Default for AlignedBlobBuf

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Drop for AlignedBlobBuf

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fn drop(&mut self)

Executes the destructor for this type. Read more
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fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)
Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned. Read more
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impl Send for AlignedBlobBuf

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impl Sync for AlignedBlobBuf

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Blanket 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.