Struct VirtArena

pub struct VirtArena(/* private fields */);

A memory arena which leverages the virtual memory system for allocating structures in a single contiguous memory region.

Implementations

impl VirtArena

pub fn alloc(&self, layout: Layout) -> NonNull<u8>

Allocates a memory for the given layout.

pub unsafe fn alloc_zeroed<T: Sized>(&self) -> &mut T

Allocates a struct T inside the arena and clears its memory to 0.

Safety

Look into std::mem::zeroed for safety concerns.

pub unsafe fn alloc_slice_zeroed<T: Sized>(&self, count: usize) -> &mut [T]

Allocates a slice [T] inside the arena and clears its memory to 0.

Safety

Look into std::mem::zeroed for safety concerns.

pub fn alloc_uninit<T: Sized>(&self) -> &mut MaybeUninit<T>

Allocates memory for struct T.

pub fn alloc_slice_uninit<T: Sized>( &self, count: usize, ) -> &mut [MaybeUninit<T>]

Allocates memory for slice [T].

pub fn alloc_with<T: Sized>(&self, fun: impl FnOnce() -> T) -> &mut T

Allocates a struct T inside the arena and sets its content to the output of fun.

pub fn alloc_value<T: Sized>(&self, val: T) -> &mut T

Allocates a struct T inside the arena and moves val into the allocation.

pub fn bytes_used(&self) -> usize

Returns the number of bytes currently allocated from the arena.

pub fn reset(&mut self)

Restes the arena storage, Invalidating all the references allocated. This method does not run the destructors! Those need to be run manually.

Trait Implementations

impl Default for VirtArena

fn default() -> VirtArena

Returns the “default value” for a type.

impl Send for VirtArena