57     let (start, size) = unsafe { (HEAP.as_mut_ptr() as usize, HEAP.len()) };  in init()
61     unsafe { heap.init(start, size) };  in init()
65 pub fn aligned_boxed_slice(size: usize, align: usize) -> Option<Box<[u8]>> {  in aligned_boxed_slice()
66     let size = NonZeroUsize::new(size)?.get();  in aligned_boxed_slice()  localVariable
67     let layout = Layout::from_size_align(size, align).ok()?;  in aligned_boxed_slice()
71     let slice_ptr = ptr::slice_from_raw_parts_mut(ptr, size);  in aligned_boxed_slice()
78 unsafe extern "C" fn malloc(size: usize) -> *mut c_void {  in malloc()
79     allocate(size, false).map_or(ptr::null_mut(), |p| p.cast::<c_void>().as_ptr())  in malloc()
83 unsafe extern "C" fn calloc(nmemb: usize, size: usize) -> *mut c_void {  in calloc()
84     let Some(size) = nmemb.checked_mul(size) else { return ptr::null_mut() };  in calloc()
85     allocate(size, true).map_or(ptr::null_mut(), |p| p.cast::<c_void>().as_ptr())  in calloc()
118     let (ptr, size) = unsafe {  in free()
122     let size = NonZeroUsize::new(size).unwrap();  in free()  localVariable
123     let layout = malloc_layout(size).unwrap();  in free()
132 fn allocate(size: usize, zeroed: bool) -> Option<NonNull<usize>> {  in allocate()
133     let size = NonZeroUsize::new(size)?.checked_add(mem::size_of::<usize>())?;  in allocate()  localVariable
134     let layout = malloc_layout(size)?;  in allocate()
148         *ptr = size.get();  in allocate()
153 fn malloc_layout(size: NonZeroUsize) -> Option<Layout> {  in malloc_layout()
156     Layout::from_size_align(size.get(), ALIGN).ok()  in malloc_layout()