Rust allocator backed by ESP-IDF

This is a memory allocator for Rust, backed by the ESP-IDF.

This is intended to be used on an ESP32, linked against the ESP-IDF. For more information see:

• https://github.com/ctron/rust-esp-container/
• https://github.com/ctron/rust-esp-template
• https://github.com/MabezDev/rust-xtensa.git
• https://quickhack.net/nom/blog/2019-05-14-build-rust-environment-for-esp32.html

Usage

Add the following to your main, application project:

~~~rust extern crate espidfalloc;

[global_allocator]

static A: espidfalloc::EspIdfAllocator = espidfalloc::EspIdfAllocator; ~~~

Error handler

If you use a custom global allocator in your application, you will also need an error handler.

The following code will use the ESP-IDF abort() method to handle the error:

~~~rust

![feature(allocerrorhandler)]

use core::alloc::Layout;

extern "C" { fn abort() -> !; }

[allocerrorhandler]

fn allocerror(layout: Layout) -> ! { unsafe { abort(); } } ~~~

Using with alloc

Also be sure to link in the alloc create, as you might want this. Add the following to your Xargo.toml:

~~~toml [target.xtensa-esp32-none-elf.dependencies] alloc={} ~~~