Struct WithoutDealloc 

pub struct WithoutDealloc<A>(pub A);

Wraps a bump allocator and does nothing on deallocate.

This type only implements Allocator for wrapped types that implement BumpAllocator, so you don’t accidentally leak memory.

Tuple Fields

0: A

Trait Implementations

impl<A: BumpAllocatorExt> Allocator for WithoutDealloc<A>

Available on crate feature nightly-allocator-api only.

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.

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 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.

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: BumpAllocatorExt> Allocator for WithoutDealloc<A>

Available on crate feature allocator-api2-03 only.

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.

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

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

fn by_ref(&self) -> &Self

where Self: Sized,

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

impl<A: BumpAllocator> Allocator for WithoutDealloc<A>

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

Attempts to allocate a block of memory.

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

Deallocates the memory referenced by ptr.

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<B: BumpAllocator> BumpAllocator for WithoutDealloc<B>

fn any_stats(&self) -> AnyStats<'_>

Returns a type which provides statistics about the memory usage of the bump allocator.

fn checkpoint(&self) -> Checkpoint

Creates a checkpoint of the current bump position.

unsafe fn reset_to(&self, checkpoint: Checkpoint)

Resets the bump position to a previously created checkpoint. The memory that has been allocated since then will be reused by future allocations.

fn prepare_allocation( &self, layout: Layout, ) -> Result<Range<NonNull<u8>>, AllocError>

Returns a pointer range of free space in the bump allocator with a size of at least layout.size().

unsafe fn allocate_prepared( &self, layout: Layout, range: Range<NonNull<u8>>, ) -> NonNull<u8>

Allocate part of the free space returned from a prepare_allocation call.

unsafe fn allocate_prepared_rev( &self, layout: Layout, range: Range<NonNull<u8>>, ) -> NonNull<u8>

Allocate part of the free space returned from a prepare_allocation call starting at the end.

impl<B: BumpAllocatorExt> BumpAllocatorExt for WithoutDealloc<B>

type Stats<'b> = <B as BumpAllocatorExt>::Stats<'b> where Self: 'b

The type returned by the stats method.

fn stats(&self) -> Self::Stats<'_>

Returns a type which provides statistics about the memory usage of the bump allocator.

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

A specialized version of allocate.

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

A specialized version of allocate.

fn allocate_sized<T>(&self) -> NonNull<T>

A specialized version of allocate.

fn try_allocate_sized<T>(&self) -> Result<NonNull<T>, AllocError>

A specialized version of allocate.

fn allocate_slice<T>(&self, len: usize) -> NonNull<T>

A specialized version of allocate.

fn try_allocate_slice<T>(&self, len: usize) -> Result<NonNull<T>, AllocError>

A specialized version of allocate.

unsafe fn shrink_slice<T>( &self, ptr: NonNull<T>, old_len: usize, new_len: usize, ) -> Option<NonNull<T>>

A specialized version of shrink.

fn prepare_slice_allocation<T>(&self, len: usize) -> NonNull<[T]>

A specialized version of prepare_allocation.

fn try_prepare_slice_allocation<T>( &self, len: usize, ) -> Result<NonNull<[T]>, AllocError>

A specialized version of prepare_allocation.

unsafe fn allocate_prepared_slice<T>( &self, ptr: NonNull<T>, len: usize, cap: usize, ) -> NonNull<[T]>

A specialized version of allocate_prepared.

unsafe fn allocate_prepared_slice_rev<T>( &self, ptr: NonNull<T>, len: usize, cap: usize, ) -> NonNull<[T]>

A specialized version of allocate_prepared_rev.

impl<A: Clone> Clone for WithoutDealloc<A>

fn clone(&self) -> WithoutDealloc<A>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<A: Debug> Debug for WithoutDealloc<A>

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

Formats the value using the given formatter.

impl<A: Default> Default for WithoutDealloc<A>

fn default() -> WithoutDealloc<A>

Returns the “default value” for a type.

impl<A: Hash> Hash for WithoutDealloc<A>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<A: Ord> Ord for WithoutDealloc<A>

fn cmp(&self, other: &WithoutDealloc<A>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<A: PartialEq> PartialEq for WithoutDealloc<A>

fn eq(&self, other: &WithoutDealloc<A>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<A: PartialOrd> PartialOrd for WithoutDealloc<A>

fn partial_cmp(&self, other: &WithoutDealloc<A>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a, B: BumpAllocatorScope<'a>> BumpAllocatorScope<'a> for WithoutDealloc<B>

impl<A: Copy> Copy for WithoutDealloc<A>

impl<A: Eq> Eq for WithoutDealloc<A>

impl<A: MutBumpAllocator> MutBumpAllocator for WithoutDealloc<A>

impl<A> StructuralPartialEq for WithoutDealloc<A>