85 lines
1.9 KiB
Rust
85 lines
1.9 KiB
Rust
use {
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crate::utils::{
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linkedlist::NodeRef,
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ptr_ext::{MutPtrExt, PtrExt},
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},
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jay_config::keyboard::mods::Modifiers,
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std::{
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cell::UnsafeCell,
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fmt::{Debug, Formatter},
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mem,
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rc::{Rc, Weak},
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},
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};
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pub struct CloneCell<T> {
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data: UnsafeCell<T>,
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}
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impl<T: UnsafeCellCloneSafe> Clone for CloneCell<T> {
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fn clone(&self) -> Self {
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Self {
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data: UnsafeCell::new(self.get()),
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}
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}
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}
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impl<T: UnsafeCellCloneSafe + Debug> Debug for CloneCell<T> {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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self.get().fmt(f)
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}
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}
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impl<T> CloneCell<T> {
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pub const fn new(t: T) -> Self {
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Self {
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data: UnsafeCell::new(t),
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}
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}
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#[inline(always)]
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pub fn get(&self) -> T
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where
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T: UnsafeCellCloneSafe,
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{
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unsafe { self.data.get().deref().clone() }
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}
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#[inline(always)]
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pub fn set(&self, t: T) -> T {
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unsafe { mem::replace(self.data.get().deref_mut(), t) }
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}
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#[inline(always)]
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pub fn take(&self) -> T
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where
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T: Default,
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{
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self.set(T::default())
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}
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}
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impl<T: Default> Default for CloneCell<T> {
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fn default() -> Self {
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Self::new(Default::default())
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}
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}
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pub unsafe trait UnsafeCellCloneSafe: Clone {}
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unsafe impl<T: UnsafeCellCloneSafe> UnsafeCellCloneSafe for Option<T> {}
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unsafe impl<T: ?Sized> UnsafeCellCloneSafe for Rc<T> {}
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unsafe impl<T: ?Sized> UnsafeCellCloneSafe for Weak<T> {}
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unsafe impl<T> UnsafeCellCloneSafe for NodeRef<T> {}
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unsafe impl UnsafeCellCloneSafe for () {}
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unsafe impl UnsafeCellCloneSafe for u64 {}
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unsafe impl UnsafeCellCloneSafe for i32 {}
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unsafe impl UnsafeCellCloneSafe for u32 {}
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unsafe impl UnsafeCellCloneSafe for usize {}
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unsafe impl<A: UnsafeCellCloneSafe, B: UnsafeCellCloneSafe> UnsafeCellCloneSafe for (A, B) {}
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unsafe impl UnsafeCellCloneSafe for Modifiers {}
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