| //! This module contains a type that can make `Send + !Sync` types `Sync` by |
| //! disallowing all immutable access to the value. |
| //! |
| //! A similar primitive is provided in the `sync_wrapper` crate. |
| |
| pub(crate) struct SyncWrapper<T> { |
| value: T, |
| } |
| |
| // safety: The SyncWrapper being send allows you to send the inner value across |
| // thread boundaries. |
| unsafe impl<T: Send> Send for SyncWrapper<T> {} |
| |
| // safety: An immutable reference to a SyncWrapper is useless, so moving such an |
| // immutable reference across threads is safe. |
| unsafe impl<T> Sync for SyncWrapper<T> {} |
| |
| impl<T> SyncWrapper<T> { |
| pub(crate) fn new(value: T) -> Self { |
| Self { value } |
| } |
| |
| pub(crate) fn into_inner(self) -> T { |
| self.value |
| } |
| } |
