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use std::panic::RefUnwindSafe;
use std::panic::UnwindSafe;
use crate::alloc::{MemPool,PoolGuard};
use crate::*;
use crate::stm::Journal;
use std::cmp::*;
use std::fmt::{Debug, Display, Formatter};
use std::ops::Deref;
use std::sync::Arc;
pub struct RootCell<'a, T: 'a, A: MemPool>(&'a T, Arc<PoolGuard<A>>);
impl<T: ?Sized, A: MemPool> !Sync for RootCell<'_, T, A> {}
unsafe impl<T: PSafe + Send, A: MemPool> Send for RootCell<'_, T, A> {}
unsafe impl<T: PSafe, A: MemPool> TxInSafe for RootCell<'_, T, A> {}
impl<T, A: MemPool> UnwindSafe for RootCell<'_, T, A> {}
impl<T, A: MemPool> RefUnwindSafe for RootCell<'_, T, A> {}
impl<T, A: MemPool> !TxOutSafe for RootCell<'_, T, A> {}
impl<T, A: MemPool> !PSafe for RootCell<'_, T, A> {}
impl<'a, T: 'a + PSafe, A: MemPool> RootCell<'a, T, A> {
pub fn new(value: &'a T, pool: Arc<PoolGuard<A>>) -> Self {
Self(value, pool)
}
pub fn strong_count(root: &Self) -> usize {
Arc::strong_count(&root.1)
}
}
impl<T: PSafe, A: MemPool> Clone for RootCell<'_, T, A> {
fn clone(&self) -> Self {
Self(self.0, self.1.clone())
}
}
impl<T: Ord + PSafe, A: MemPool> Ord for RootCell<'_, T, A> {
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
self.deref().cmp(&other.deref())
}
}
impl<T: PSafe + PartialOrd, A: MemPool> PartialOrd for RootCell<'_, T, A> {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
self.deref().partial_cmp(&other.deref())
}
}
impl<T: PSafe + Eq, A: MemPool> Eq for RootCell<'_, T, A> {}
impl<T: PSafe + PartialEq, A: MemPool> PartialEq for RootCell<'_, T, A> {
#[inline]
fn eq(&self, other: &Self) -> bool {
self.deref().eq(other.deref())
}
}
impl<T: PSafe, A: MemPool> Deref for RootCell<'_, T, A> {
type Target = T;
#[inline]
fn deref(&self) -> &T {
&*self.0
}
}
impl<T: Debug + PSafe, A: MemPool> Debug for RootCell<'_, T, A> {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
self.deref().fmt(f)
}
}
impl<T: Display + PSafe, A: MemPool> Display for RootCell<'_, T, A> {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
self.deref().fmt(f)
}
}
pub trait RootObj<A: MemPool> {
fn init(journal: &Journal<A>) -> Self;
}
impl<T: Default, A: MemPool> RootObj<A> for T {
default fn init(_journal: &Journal<A>) -> Self {
T::default()
}
}
impl<T: Default, A: MemPool> RootObj<A> for &[T] {
default fn init(_journal: &Journal<A>) -> Self {
<&[T]>::default()
}
}
impl<T: RootObj<A>, A: MemPool> RootObj<A> for &[T] {
default fn init(journal: &Journal<A>) -> Self {
<&[T]>::init(journal)
}
}