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use std::{
borrow::{Borrow, ToOwned},
ops::{Deref, DerefMut},
ptr::NonNull,
};
#[derive(Debug)]
pub struct SfBox<T: SfResource + ?Sized>(pub(crate) NonNull<T>);
impl<T: SfResource> SfBox<T> {
pub(crate) fn new(ptr: *mut T) -> Option<Self> {
NonNull::new(ptr).map(SfBox)
}
}
impl<T: SfResource> Deref for SfBox<T> {
type Target = T;
fn deref(&self) -> &T {
unsafe { self.0.as_ref() }
}
}
impl<T: SfResource> DerefMut for SfBox<T> {
fn deref_mut(&mut self) -> &mut Self::Target {
unsafe { self.0.as_mut() }
}
}
impl<T: SfResource> Borrow<T> for SfBox<T> {
fn borrow(&self) -> &T {
&*self
}
}
impl<T: SfResource + ToOwned<Owned = SfBox<T>>> Clone for SfBox<T> {
fn clone(&self) -> SfBox<T> {
(**self).to_owned()
}
}
impl<T: SfResource + ?Sized> Drop for SfBox<T> {
fn drop(&mut self) {
unsafe { self.0.as_mut().dispose() }
}
}
pub trait Dispose {
unsafe fn dispose(&mut self);
}
pub trait SfResource: Dispose {}
impl<T: Dispose> SfResource for T {}
pub trait RawDefault {
fn raw_default() -> *mut Self;
}
impl<T: SfResource + RawDefault> Default for SfBox<T> {
fn default() -> Self {
SfBox::new(T::raw_default()).expect("Failed to create default")
}
}