Struct LockedHeapWithRescue 

pub struct LockedHeapWithRescue<const ORDER: usize> { /* private fields */ }

A locked version of Heap with rescue before oom

Usage

Create a locked heap:

use buddy_system_allocator::*;
let heap = LockedHeapWithRescue::new(|heap: &mut Heap<33>, layout: &core::alloc::Layout| {});

Before oom, the allocator will try to call rescue function and try for one more time.

Implementations

impl<const ORDER: usize> LockedHeapWithRescue<ORDER>

pub const fn new(rescue: fn(&mut Heap<ORDER>, &Layout)) -> Self

Creates an empty heap

Trait Implementations

impl<const ORDER: usize> Deref for LockedHeapWithRescue<ORDER>

Available on crate feature use_spin only.

type Target = Mutex<Heap<ORDER>>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<const ORDER: usize> GlobalAlloc for LockedHeapWithRescue<ORDER>

Available on crate feature use_spin only.

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.