Struct AllocatorApiGlue

pub struct AllocatorApiGlue<'a, 'b, const CHUNK_SIZE: usize>(/* private fields */);

Helper struct generated by GlobalChunkAllocator that can be used in structs that accept a custom instance of a specific allocator implementation.

This is mainly relevant for testing the allocator. In a real environment, an instance of GlobalChunkAllocator is likely registered a global allocator for Rust. Thus, Vec and others default to the Global allocator, which will use GlobalChunkAllocator.

Example

// ...

// Vector from the standard library will use my custom allocator instead.
let vec = Vec::<u8, _>::with_capacity_in(123, ALLOCATOR.allocator_api_glue());

Trait Implementations

impl<'a, 'b, const CHUNK_SIZE: usize> Allocator for AllocatorApiGlue<'a, 'b, CHUNK_SIZE>

fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>

🔬This is a nightly-only experimental API. (allocator_api)

Attempts to allocate a block of memory.

unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout)

🔬This is a nightly-only experimental API. (allocator_api)

Deallocates the memory referenced by ptr.

unsafe fn grow( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, ) -> Result<NonNull<[u8]>, AllocError>

🔬This is a nightly-only experimental API. (allocator_api)

Attempts to extend the memory block.

fn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>

🔬This is a nightly-only experimental API. (allocator_api)

Behaves like allocate, but also ensures that the returned memory is zero-initialized.

unsafe fn grow_zeroed( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, ) -> Result<NonNull<[u8]>, AllocError>

🔬This is a nightly-only experimental API. (allocator_api)

Behaves like grow, but also ensures that the new contents are set to zero before being returned.

unsafe fn shrink( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, ) -> Result<NonNull<[u8]>, AllocError>

🔬This is a nightly-only experimental API. (allocator_api)

Attempts to shrink the memory block.

fn by_ref(&self) -> &Self

where Self: Sized,

🔬This is a nightly-only experimental API. (allocator_api)

Creates a “by reference” adapter for this instance of Allocator.

impl<'a, 'b, const CHUNK_SIZE: usize> Debug for AllocatorApiGlue<'a, 'b, CHUNK_SIZE>

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

Formats the value using the given formatter.