#[stable(feature = "rust1", since = "1.0.0")]
pub struct IterMut<'a, T: 'a> {
// Internal safety invariant: the entire slice is dereferencable.
- pub(crate) ring: *mut [T],
- pub(crate) tail: usize,
- pub(crate) head: usize,
- pub(crate) phantom: PhantomData<&'a mut [T]>,
+ ring: *mut [T],
+ tail: usize,
+ head: usize,
+ phantom: PhantomData<&'a mut [T]>,
+}
+
+impl<'a, T> IterMut<'a, T> {
+ pub(super) unsafe fn new(
+ ring: *mut [T],
+ tail: usize,
+ head: usize,
+ phantom: PhantomData<&'a mut [T]>,
+ ) -> Self {
+ IterMut { ring, tail, head, phantom }
+ }
}
// SAFETY: we do nothing thread-local and there is no interior mutability,
pub fn iter_mut(&mut self) -> IterMut<'_, T> {
// SAFETY: The internal `IterMut` safety invariant is established because the
// `ring` we create is a dereferencable slice for lifetime '_.
- IterMut {
- tail: self.tail,
- head: self.head,
- ring: ptr::slice_from_raw_parts_mut(self.ptr(), self.cap()),
- phantom: PhantomData,
- }
+ let ring = ptr::slice_from_raw_parts_mut(self.ptr(), self.cap());
+
+ unsafe { IterMut::new(ring, self.tail, self.head, PhantomData) }
}
/// Returns a pair of slices which contain, in order, the contents of the
// SAFETY: The internal `IterMut` safety invariant is established because the
// `ring` we create is a dereferencable slice for lifetime '_.
- IterMut {
- tail,
- head,
- ring: ptr::slice_from_raw_parts_mut(self.ptr(), self.cap()),
- phantom: PhantomData,
- }
+ let ring = ptr::slice_from_raw_parts_mut(self.ptr(), self.cap());
+
+ unsafe { IterMut::new(ring, tail, head, PhantomData) }
}
/// Creates a draining iterator that removes the specified range in the