alloc-cortex-m 0.4.4

#![no_std]
#![no_main]
#![feature(alloc_error_handler)]

extern crate alloc;

use alloc::vec::Vec;
use alloc_cortex_m::CortexMHeap;
use core::alloc::Layout;
use core::panic::PanicInfo;
use cortex_m_rt::entry;

#[global_allocator]
static ALLOCATOR: CortexMHeap = CortexMHeap::empty();

#[entry]
fn main() -> ! {
    // Initialize the allocator BEFORE you use it
    {
        use core::mem::MaybeUninit;
        const HEAP_SIZE: usize = 1024;
        static mut HEAP: [MaybeUninit<u8>; HEAP_SIZE] = [MaybeUninit::uninit(); HEAP_SIZE];
        unsafe { ALLOCATOR.init(HEAP.as_ptr() as usize, HEAP_SIZE) }
    }

    let mut xs = Vec::new();
    xs.push(1);

    loop { /* .. */ }
}

#[alloc_error_handler]
fn oom(_: Layout) -> ! {
    loop {}
}

#[panic_handler]
fn panic(_: &PanicInfo) -> ! {
    loop {}
}