libos 0.1.2

Library OS
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use alloc::alloc::{GlobalAlloc, Layout};
use core::ptr::null_mut;

#[global_allocator]
static ALLOCATOR: Dummy = Dummy;

pub struct Dummy;

unsafe impl GlobalAlloc for Dummy {
    unsafe fn alloc(&self, _layout: Layout) -> *mut u8 {
        null_mut()
    }

    unsafe fn dealloc(&self, _ptr: *mut u8, _layout: Layout) {
        panic!("dealloc should be never called")
    }
}

#[alloc_error_handler]
pub fn alloc_error_handler(layout: Layout) -> ! {
    panic!("allocation error: {:?}", layout)
}