#allocator #no-std #heap

no-std buddy_system_allocator

A bare metal allocator that uses buddy system

21 releases

0.9.0 Dec 14, 2022
0.8.0 Apr 22, 2021
0.7.0 Feb 6, 2021
0.6.0 Nov 23, 2020
0.1.2 Mar 18, 2019

#40 in Memory management

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6,999 downloads per month
Used in 2 crates

MIT license

29KB
615 lines

buddy_system_allocator

Crates.io version docs.rs

An (almost) drop-in replacement for phil-opp/linked-list-allocator. But it uses buddy system instead.

Usage

To use buddy_system_allocator for global allocator:

use buddy_system_allocator::LockedHeap;

#[global_allocator]
static HEAP_ALLOCATOR: LockedHeap = LockedHeap::<32>::empty();

To init the allocator:

unsafe {
    HEAP_ALLOCATOR.lock().init(heap_start, heap_size);
    // or
    HEAP_ALLOCATOR.lock().add_to_heap(heap_start, heap_end);
}

You can also use FrameAllocator and LockedHeapWithRescue, see their documentation for usage.

Features

  • use_spin (default): Provide a LockedHeap type that implements the GlobalAlloc trait by using a spinlock.
  • const_fn (nightly only): Provide const fn version of LockedHeapWithRescue::new.

License

Some code comes from phil-opp's linked-list-allocator.

Licensed under MIT License. Thanks phill-opp's linked-list-allocator for inspirations and interface.

Dependencies

~61KB