Struct Perm 

pub struct Perm;

Perm Allocator.

Implementations

impl Perm

pub const fn new() -> Self

Create a Perm allocator

pub fn alloc_count() -> u64

Get the number of outstanding allocations.

pub fn info() -> Option<(usize, usize, [usize; 13])>

Get info : Current alloc index, number of overflow blocks, free chain lengths for each size class.

#Example

use pstd::localalloc::Perm;
println!( "Perm::info = {:?}", Perm::info() );

Trait Implementations

impl Allocator for Perm

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

Attempts to allocate a block of memory.

unsafe fn deallocate(&self, p: NonNull<u8>, lay: 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 Clone for Perm

fn clone(&self) -> Perm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Perm

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

Formats the value using the given formatter.

impl Default for Perm

fn default() -> Perm

Returns the “default value” for a type.

impl GlobalAlloc for Perm

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

Allocates memory as described by the given layout.

unsafe fn dealloc(&self, p: *mut u8, lay: 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.