Struct std::cell::SyncUnsafeCell

source ·
pub struct SyncUnsafeCell<T>where
    T: ?Sized,
{ value: UnsafeCell<T>, }
🔬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.

Fields§

§value: UnsafeCell<T>
🔬This is a nightly-only experimental API. (sync_unsafe_cell #95439)

Implementations§

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

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

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

Unwraps the value.

🔬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

🔬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.

🔬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§

Formats the value using the given formatter. Read more

Creates an SyncUnsafeCell, with the Default value for T.

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

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Converts to this type from the input type.

Returns the argument unchanged.

Calls U::from(self).

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

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.