This commit is contained in:
aozhiwei 2023-10-07 09:28:11 +08:00
parent a90e99ab62
commit 5df2e5243d

View File

@ -29,11 +29,58 @@ impl<T> ListHead<T> {
self.prev.upgrade().unwrap().borrow_mut().next = self.next.clone();
}
pub fn add_tail(&mut self, pnew: &mut ListHead<T>) {
let prev = &mut self.prev;
unsafe {
let next = Weak::from_raw(self);
}
pub fn add_tail(head: &mut Rc::<RefCell::<ListHead<T>>>,
pnew: &mut Rc::<RefCell::<ListHead<T>>>) {
let prev = &mut head.borrow_mut().prev;
let next = Rc::downgrade(head);
next.upgrade().unwrap().borrow_mut().prev = Rc::downgrade(pnew);
pnew.borrow_mut().next = next;
pnew.borrow_mut().prev = prev.clone();
prev.upgrade().unwrap().borrow_mut().next = Rc::downgrade(pnew);
}
}
/*
pub struct ListHead<T> {
prev: Weak::<ListHead<T>>,
next: Weak::<ListHead<T>>,
data: Weak::<RefCell::<T>>,
}
impl<T> ListHead<T> {
pub fn new() -> RefCell::<Rc::<ListHead<T>>> {
let mut this = Rc::new(ListHead{
prev: Weak::<ListHead<T>>::new(),
next: Weak::<ListHead<T>>::new(),
data: Weak::<RefCell::<T>>::new(),
});
let p = RefCell::new(this);
//this.prev = Rc::downgrade(&this).clone();
//this.prev = Weak::<ListHead<T>>::new();
//this.next = Rc::downgrade(&this);
//p.borrow_mut().prev = Rc::downgrade(&p.borrow());
p.borrow_mut().prev = Weak::<ListHead<T>>::new();
return p;
}
/*
pub fn data(&self) -> &Weak::<RefCell::<T>> {
return &self.data;
}
pub fn del(&mut self) {
self.next.upgrade().unwrap().borrow_mut().prev = self.prev.clone();
self.prev.upgrade().unwrap().borrow_mut().next = self.next.clone();
}
pub fn add_tail(&mut self, pnew: &mut ListHead<T>) {
let prev = &mut self.prev;
unsafe {
let next = Weak::from_raw(&self);
//next.upgrade().unwrap().borrow_mut().prev = Weak::from_raw(pnew);
}
}
*/
}
*/