# Struct std::cell::SyncUnsafeCell

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    pub struct SyncUnsafeCell<T>where
        T: ?Sized,{ /* private fields */ }

🔬This is a nightly-only experimental API. (`sync_unsafe_cell` #95439)
Expand description

`UnsafeCell`, but `Sync`.

This is just an `UnsafeCell`, except it implements `Sync` if `T` implements `Sync`.

`UnsafeCell` doesn’t implement `Sync`, to prevent accidental mis-use. You can use `SyncUnsafeCell` instead of `UnsafeCell` to allow it to be shared between threads, if that’s intentional. Providing proper synchronization is still the task of the user, making this type just as unsafe to use.

See `UnsafeCell` for details.

## Implementations§

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### impl<T> SyncUnsafeCell<T>

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#### pub const fn new(value: T) -> SyncUnsafeCell<T>

🔬This is a nightly-only experimental API. (`sync_unsafe_cell` #95439)

Constructs a new instance of `SyncUnsafeCell` which will wrap the specified value.

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#### pub const fn into_inner(self) -> T

🔬This is a nightly-only experimental API. (`sync_unsafe_cell` #95439)

Unwraps the value, consuming the cell.

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### impl<T> SyncUnsafeCell<T>where T: ?Sized,

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#### pub const fn get(&self) -> *mut T

🔬This is a nightly-only experimental API. (`sync_unsafe_cell` #95439)

Gets a mutable pointer to the wrapped value.

This can be cast to a pointer of any kind. Ensure that the access is unique (no active references, mutable or not) when casting to `&mut T`, and ensure that there are no mutations or mutable aliases going on when casting to `&T`

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#### pub const fn get_mut(&mut self) -> &mut T

🔬This is a nightly-only experimental API. (`sync_unsafe_cell` #95439)

Returns a mutable reference to the underlying data.

This call borrows the `SyncUnsafeCell` mutably (at compile-time) which guarantees that we possess the only reference.

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#### pub const fn raw_get(this: *const SyncUnsafeCell<T>) -> *mut T

🔬This is a nightly-only experimental API. (`sync_unsafe_cell` #95439)

Gets a mutable pointer to the wrapped value.

See `UnsafeCell::get` for details.

## Trait Implementations§

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### impl<T> Debug for SyncUnsafeCell<T>where T: ?Sized,

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#### fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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### impl<T> Default for SyncUnsafeCell<T>where T: Default,

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#### fn default() -> SyncUnsafeCell<T>

Creates an `SyncUnsafeCell`, with the `Default` value for T.

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### impl<T> From<T> for SyncUnsafeCell<T>

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#### fn from(t: T) -> SyncUnsafeCell<T>

Creates a new `SyncUnsafeCell<T>` containing the given value.

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### impl<T, U> CoerceUnsized<SyncUnsafeCell<U>> for SyncUnsafeCell<T>where T: CoerceUnsized<U>,

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### impl<T, U> DispatchFromDyn<SyncUnsafeCell<U>> for SyncUnsafeCell<T>where T: DispatchFromDyn<U>,

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### impl<T> Sync for SyncUnsafeCell<T>where T: Sync + ?Sized,

## Auto Trait Implementations§

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### impl<T> !RefUnwindSafe for SyncUnsafeCell<T>

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### impl<T: ?Sized> Send for SyncUnsafeCell<T>where T: Send,

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### impl<T: ?Sized> Unpin for SyncUnsafeCell<T>where T: Unpin,

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### impl<T: ?Sized> UnwindSafe for SyncUnsafeCell<T>where T: UnwindSafe,

## Blanket Implementations§

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### impl<T> Any for Twhere T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for Twhere T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for Twhere T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> From<!> for T

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#### fn from(t: !) -> T

Converts to this type from the input type.
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for Twhere U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.