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MemoryCallbacks

reifydb_flow_operator_abi::callbacks

Struct MemoryCallbacks 

Source 
#[repr(C)]
pub struct MemoryCallbacks {
    pub alloc: extern "C" fn(size: usize) -> *mut u8,
    pub free: extern "C" fn(ptr: *mut u8, size: usize),
    pub realloc: extern "C" fn(ptr: *mut u8, old_size: usize, new_size: usize) -> *mut u8,
}
Expand description

Memory management callbacks

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§alloc: extern "C" fn(size: usize) -> *mut u8

Allocate memory from the host

§Parameters

  • size: Number of bytes to allocate

§Returns

  • Pointer to allocated memory, or null on failure
§free: extern "C" fn(ptr: *mut u8, size: usize)

Free memory previously allocated by alloc

§Parameters

  • ptr: Pointer to memory to free
  • size: Size of allocation (must match original alloc size)
§realloc: extern "C" fn(ptr: *mut u8, old_size: usize, new_size: usize) -> *mut u8

Reallocate memory

§Parameters

  • ptr: Current pointer (may be null)
  • old_size: Current size (0 if ptr is null)
  • new_size: Desired new size

§Returns

  • Pointer to reallocated memory, or null on failure

Trait Implementations§

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impl Clone for MemoryCallbacks

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fn clone(&self) -> MemoryCallbacks

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 Copy for MemoryCallbacks

Auto Trait Implementations§

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 = !

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

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.