forked from Orchid/orchid
37 lines
973 B
Rust
37 lines
973 B
Rust
use std::marker::PhantomData;
|
|
use std::mem::size_of;
|
|
|
|
use crate::api;
|
|
use crate::system::{DynSystemCard, SystemCard};
|
|
|
|
pub struct SystemHandle<C: SystemCard> {
|
|
pub(crate) _card: PhantomData<C>,
|
|
pub(crate) id: api::SysId,
|
|
}
|
|
impl<C: SystemCard> SystemHandle<C> {
|
|
pub(crate) fn new(id: api::SysId) -> Self { Self { _card: PhantomData, id } }
|
|
pub fn id(&self) -> api::SysId { self.id }
|
|
}
|
|
impl<C: SystemCard> Clone for SystemHandle<C> {
|
|
fn clone(&self) -> Self { Self::new(self.id) }
|
|
}
|
|
|
|
pub trait DynSystemHandle {
|
|
fn id(&self) -> api::SysId;
|
|
fn get_card(&self) -> &dyn DynSystemCard;
|
|
}
|
|
|
|
pub fn leak_card<T: Default>() -> &'static T {
|
|
const {
|
|
if 0 != size_of::<T>() {
|
|
panic!("Attempted to leak positively sized Card. Card types must always be zero-sized");
|
|
}
|
|
}
|
|
Box::leak(Box::default())
|
|
}
|
|
|
|
impl<C: SystemCard> DynSystemHandle for SystemHandle<C> {
|
|
fn id(&self) -> api::SysId { self.id }
|
|
fn get_card(&self) -> &'static dyn DynSystemCard { leak_card::<C>() }
|
|
}
|