Struct DefaultAlloc

pub struct DefaultAlloc;

Default allocator, delegating to the global allocator.

Trait Implementations

impl Alloc for DefaultAlloc

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

Attempts to allocate a block of memory fitting the given Layout.

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

Attempts to allocate a zeroed block of memory fitting the given Layout.

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

Attempts to allocate a block of memory fitting the given Layout, filled with bytes initialized to n.

fn alloc_patterned<F: Fn(usize) -> u8>( &self, layout: Layout, pattern: F, ) -> Result<NonNull<u8>, AllocError>

Attempts to allocate a block of memory fitting the given Layout and fill it by calling pattern(i) for each byte index i.

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

Deallocates a previously allocated block.

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

Attempts to allocate a block of memory for len instances of T.

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

Attempts to allocate a zeroed block of memory for len instances of T.

fn alloc_slice_filled<T>( &self, len: usize, n: u8, ) -> Result<NonNull<[T]>, AllocError>

Attempts to allocate a block of memory for len instances of T, filled with bytes initialized to n.

fn alloc_slice_patterned<T, F: Fn(usize) -> u8>( &self, len: usize, pattern: F, ) -> Result<NonNull<[T]>, AllocError>

Attempts to allocate a block of memory for len instances of T and fill it by calling pattern(i) for each byte index i.

unsafe fn dealloc_n<T>(&self, ptr: NonNull<T>, n: usize)

Deallocates a previously allocated block.

unsafe fn drop_and_dealloc<T: ?Sized>(&self, ptr: NonNull<T>)

Drops the data at a pointer and deallocates its previously allocated block.

unsafe fn drop_and_dealloc_n<T>(&self, ptr: NonNull<T>, n: usize)

Drops the data at a pointer and deallocates its previously allocated block.

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

Grow the given block to a new, larger layout.

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

Grows the given block to a new, larger layout, zeroing newly allocated space.

unsafe fn grow_patterned<F: Fn(usize) -> u8>( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, pattern: F, ) -> Result<NonNull<u8>, AllocError>

Grow the given block to a new, larger layout, filling any newly allocated bytes by calling pattern(i) for each new byte index i.

fn grow_filled( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, n: u8, ) -> Result<NonNull<u8>, AllocError>

Grows the given block to a new, larger layout, filling newly allocated space with n.

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

Shrink the given block to a new, smaller layout.

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

Reallocate a block, growing or shrinking as needed (no zeroing).

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

Reallocate a block, growing or shrinking as needed, zeroing any newly allocated bytes.

unsafe fn realloc_patterned<F: Fn(usize) -> u8>( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, pattern: F, ) -> Result<NonNull<u8>, AllocError>

Reallocate a block, growing or shrinking as needed, filling any new bytes by calling pattern(i) for each new byte index i.

unsafe fn realloc_filled( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, n: u8, ) -> Result<NonNull<u8>, AllocError>

Reallocate a block, growing or shrinking as needed, filling any newly allocated bytes with n.

impl Allocator for DefaultAlloc

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.

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 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 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 Clone for DefaultAlloc

fn clone(&self) -> DefaultAlloc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DefaultAlloc

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

Formats the value using the given formatter.

impl Default for DefaultAlloc

fn default() -> DefaultAlloc

Returns the “default value” for a type.

impl GlobalAlloc for DefaultAlloc

unsafe fn alloc(&self, layout: Layout) -> *mut u8

Allocates memory as described by the given layout.

unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout)

Deallocates the block of memory at the given ptr pointer with the given layout.

unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8

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

unsafe fn realloc( &self, ptr: *mut u8, layout: Layout, new_size: usize, ) -> *mut u8

Shrinks or grows a block of memory to the given new_size in bytes. The block is described by the given ptr pointer and layout.

impl Hash for DefaultAlloc

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 Ord for DefaultAlloc

fn cmp(&self, other: &DefaultAlloc) -> 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 PartialEq for DefaultAlloc

fn eq(&self, other: &DefaultAlloc) -> 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 PartialOrd for DefaultAlloc

fn partial_cmp(&self, other: &DefaultAlloc) -> 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 Copy for DefaultAlloc

impl Eq for DefaultAlloc

impl StructuralPartialEq for DefaultAlloc