Crate index_alloc

Index Alloc

A simple, toy static Allocator which use a fixed length array to store allocated data.

This crate expose a struct IndexAllocator which implement GlobalAlloc so it can be uses as the global allocator in no_std environment.

Disadvantages :

• Extremely unsafe
• Very slow
• Memory inefficient

Even though it seems unusable, it has plenty of advantages :

• Just kidding, don’t use that

To store allocated memory, IndexAllocator uses a MemoryIndex which stores a list of regions containing the state of the region (size, from which address, used status). For instance :

use index_alloc::IndexAllocator;

#[global_allocator]
static ALLOCATOR: IndexAllocator<2048, 16> = IndexAllocator::empty();

fn main() {
    let test_str = String::from("Hello World");
    println!("{test_str}");
}

See more example in the Repository's Examples.

Modules

• boxed
  This module contains the Box smart pointer, capable of managing memory in a IndexAllocator.
• rc
  This module contains the Rc smart point capable of shared ownership of memory in a IndexAllocator

Structs

• IndexAllocator
  The IndexAllocator struct is the main component of this crate, it creates a memory pool of size MEMORY_SIZE with an index of size INDEX_SIZE.

Enums

• IndexError
  The Error type wich the Allocator can raise.