1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
use std::cell::UnsafeCell; /// A mutable memory location that clones its contents on retrieval. pub struct CloningCell<T: Clone>(UnsafeCell<T>); impl<T: Clone> CloningCell<T> { /// Creates a new `CloningCell` containing the given value. /// /// # Example /// /// ``` /// use mitochondria::CloningCell; /// /// let c = CloningCell::new("Hello cytosol!".to_owned()); /// ``` #[inline] pub fn new(value: T) -> Self { CloningCell(UnsafeCell::new(value)) } /// Returns a clone of the contained value. /// /// # Example /// /// ``` /// use mitochondria::CloningCell; /// /// let c = CloningCell::new("Hello lysosome!".to_owned()); /// /// let greeting = c.get(); /// ``` #[inline] pub fn get(&self) -> T { unsafe { (*self.0.get()).clone() } } /// Sets the contained value. /// /// # Example /// /// ``` /// use mitochondria::CloningCell; /// /// let c = CloningCell::new("Hello vacuole!".to_owned()); /// /// c.set("Hello cytoskeleton!".to_owned()); /// ``` #[inline] pub fn set(&self, value: T) { unsafe { *self.0.get() = value; } } }