38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
use crate::ExternRef;
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use alloc::collections::BTreeMap;
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pub trait Cacheable {
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fn get_cache<'a>() -> &'a mut BTreeMap<ExternRef<Self>, Self>
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where
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Self: Sized;
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fn from_ref(ptr: ExternRef<Self>, ctor: &dyn Fn(ExternRef<Self>) -> Self) -> Self
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where
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Self: Sized,
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Self: Clone,
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{
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let opt = Self::get_cache().get(&ptr);
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if let Some(v) = opt {
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return v.clone();
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}
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Self::get_cache().insert(ptr, ctor(ptr));
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return Self::get_cache().get(&ptr).unwrap().clone();
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}
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}
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macro_rules! cacheable {
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($type: ty) => {
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paste::paste!{
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static mut [<$type:upper _CACHE>]: alloc::collections::BTreeMap<ExternRef<$type>, $type> =
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alloc::collections::BTreeMap::new();
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impl crate::handling::Cacheable for $type {
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fn get_cache<'a>() -> &'a mut alloc::collections::BTreeMap<ExternRef<$type>, $type> {
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unsafe { &mut [<$type:upper _CACHE>] }
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}
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}
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}
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};
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}
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pub(crate) use cacheable;
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