Struct Inspect

pub struct Inspect<A, F> { /* private fields */ }

An allocator that forwards allocation to alloc and calls the provided closure on each result.

This struct is created by fallback method on Allocandrescu. See its documentation for more details.

Implementations

impl<A, F> Inspect<A, F>

pub fn new(alloc: A, f: F) -> Self

Trait Implementations

impl<A, F> Allocator for Inspect<A, F>

where A: Allocator, F: Fn(Layout, Result<NonNull<[u8]>, AllocError>),

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

Attempts to allocate a block of memory.

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

Deallocates the memory referenced by ptr.

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

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

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

Attempts to extend the memory block.

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

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>

Attempts to shrink the memory block.

fn by_ref(&self) -> &Self

where Self: Sized,

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

impl<A, F> ArenaAllocator for Inspect<A, F>

where A: ArenaAllocator, F: Fn(Layout, Result<NonNull<[u8]>, AllocError>),

fn contains(&self, ptr: NonNull<u8>, layout: Layout) -> bool

Returns true if the allocation specified by ptr and layout is within the allocator’s arena.

impl<A: Debug, F: Debug> Debug for Inspect<A, F>

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

Formats the value using the given formatter.