Struct polars_utils::cell::SyncUnsafeCell

#[repr(transparent)]
pub struct SyncUnsafeCell<T: ?Sized> { /* private fields */ }

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

impl<T> SyncUnsafeCell<T>

pub fn new(value: T) -> Self

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

pub fn into_inner(self) -> T

Unwraps the value.

impl<T: ?Sized> SyncUnsafeCell<T>

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

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

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

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.

pub fn raw_get(this: *const Self) -> *mut T

Gets a mutable pointer to the wrapped value.

See UnsafeCell::get for details.

Trait Implementations

impl<T: Default> Default for SyncUnsafeCell<T>

fn default() -> SyncUnsafeCell<T>

Creates an SyncUnsafeCell, with the Default value for T.

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

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

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

impl<T: ?Sized + Sync> Sync for SyncUnsafeCell<T>