use super::*;
use core::mem;
use core::ops::{Deref, DerefMut};
use std::alloc::{alloc_zeroed, dealloc, Layout};
#[derive(Clone)]
pub struct BoxByteSlice(mem::ManuallyDrop<Box<[u8]>>);
impl BoxByteSlice {
#[inline]
pub fn new_zeroed(len: usize) -> Self {
let layout = Layout::from_size_align((len + 7) & !7, 8).unwrap();
unsafe {
BoxByteSlice(mem::ManuallyDrop::new(Box::from_raw(
core::slice::from_raw_parts_mut(alloc_zeroed(layout), len),
)))
}
}
#[inline]
pub fn as_byte_slice(&self) -> ByteSlice {
ByteSlice::new(&self[..])
}
#[inline]
pub fn as_byte_mut_slice(&mut self) -> ByteMutSlice {
ByteMutSlice::new(&mut self[..])
}
}
impl Deref for BoxByteSlice {
type Target = [u8];
#[inline]
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl DerefMut for BoxByteSlice {
#[inline]
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
impl Drop for BoxByteSlice {
#[inline]
fn drop(&mut self) {
let layout = Layout::from_size_align((self.0.len() + 7) & !7, 8).unwrap();
unsafe {
dealloc(
Box::into_raw(mem::ManuallyDrop::take(&mut self.0)) as *mut u8,
layout,
)
}
}
}
impl_byteorder!(BoxByteSlice);