Struct UniqueArcUninit
pub(in ::sync) struct UniqueArcUninit<T: ?Sized, A: Allocator> { pub(in ::sync) ptr: NonNull<ArcInner<T>>, pub(in ::sync) layout_for_value: Layout, pub(in ::sync) alloc: Option<A> }A unique owning pointer to an ArcInner that does not imply the contents are initialized,
but will deallocate it (without dropping the value) when dropped.
This is a helper for [Arc::make_mut()] to ensure correct cleanup on panic.
Fields
ptr: NonNull<ArcInner<T>>layout_for_value: Layoutalloc: Option<A>
Implementations
impl<T: ?Sized, A: Allocator> UniqueArcUninit<T, A>
fn new(for_value: &T, alloc: A) -> UniqueArcUninit<T, A>Allocates an ArcInner with layout suitable to contain
for_valueor a clone of it.fn try_new(for_value: &T, alloc: A) -> Result<UniqueArcUninit<T, A>, AllocError>Allocates an ArcInner with layout suitable to contain
for_valueor a clone of it, returning an error if allocation fails.fn data_ptr(&mut self) -> *mut TReturns the pointer to be written into to initialize the
Arc.unsafe fn into_arc(self) -> Arc<T, A>Upgrade this into a normal
Arc.Safety
The data must have been initialized (by writing to [
Self::data_ptr()]).
Trait Implementations
impl<T: ?Sized, A: Allocator> Drop for UniqueArcUninit<T, A>
fn drop(&mut self)
Auto Trait Implementations
impl<T, A> !Send for UniqueArcUninit<T, A>
impl<T, A> !Sync for UniqueArcUninit<T, A>
impl<T, A> Freeze for UniqueArcUninit<T, A>
where
NonNull<ArcInner<T>>: Freeze,
Option<A>: Freeze,
T: ?Sized,
impl<T, A> RefUnwindSafe for UniqueArcUninit<T, A>
where
NonNull<ArcInner<T>>: RefUnwindSafe,
Option<A>: RefUnwindSafe,
T: ?Sized,
impl<T, A> Unpin for UniqueArcUninit<T, A>
where
NonNull<ArcInner<T>>: Unpin,
Option<A>: Unpin,
T: ?Sized,
impl<T, A> UnsafeUnpin for UniqueArcUninit<T, A>
where
NonNull<ArcInner<T>>: UnsafeUnpin,
Option<A>: UnsafeUnpin,
T: ?Sized,
impl<T, A> UnwindSafe for UniqueArcUninit<T, A>
where
NonNull<ArcInner<T>>: UnwindSafe,
Option<A>: UnwindSafe,
T: ?Sized,
Blanket Implementations
impl<T> Any for UniqueArcUninit<T, A>
where
T: 'static + ?Sized,
fn type_id(&self) -> TypeId
impl<T> Borrow<T> for UniqueArcUninit<T, A>
where
T: ?Sized,
fn borrow(&self) -> &T
impl<T> BorrowMut<T> for UniqueArcUninit<T, A>
where
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
impl<T> From<T> for UniqueArcUninit<T, A>
fn from(t: T) -> TReturns the argument unchanged.
impl<T> SizeHint for UniqueArcUninit<T, A>
where
T: ?Sized,
fn lower_bound(&self) -> usizefn upper_bound(&self) -> Option<usize>
impl<T> SizedTypeProperties for UniqueArcUninit<T, A>
impl<T, U> Into<U> for UniqueArcUninit<T, A>
where
U: From<T>,
fn into(self) -> UCalls
U::from(self).That is, this conversion is whatever the implementation of
[From]<T> for Uchooses to do.
impl<T, U> TryFrom<U> for UniqueArcUninit<T, A>
where
U: Into<T>,
type Error = Infallible;fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
impl<T, U> TryInto<U> for UniqueArcUninit<T, A>
where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error;fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>