// core::cell

#[repr(transparent)]
pub struct SyncUnsafeCell<T: ?Sized> {
    value: UnsafeCell<T>,
}

unsafe impl<T: ?Sized + Sync> Sync for SyncUnsafeCell<T> {}

// Identical interface as UnsafeCell:

impl<T> SyncUnsafeCell<T> {
    pub const fn new(value: T) -> Self;
    pub const fn into_inner(self) -> T;
}

impl<T: ?Sized> SyncUnsafeCell<T> {
    pub const fn get(&self) -> *mut T;
    pub const fn get_mut(&mut self) -> &mut T;
    pub const fn raw_get(this: *const Self) -> *mut T;
}

impl<T> From<T> for SyncUnsafeCell<T>;
impl<T: Default> Default for SyncUnsafeCell<T>;
impl<T: ?Sized> Debug for SyncUnsafeCell<T>;