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Use std::cell::OnceCell and remove mitochondria dependency (#30207)

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`OnceCell` is now part of the standard library and we'll be able to use
it once we upgrade rust. For now we can use the version that's shipped
behind a feature flag in rust. This removes a dependency on one crate.
This commit is contained in:
Martin Robinson 2023-08-25 16:09:55 +02:00 • committed by GitHub
parent 9c310b6d4e
commit 585a25a212
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 11 additions and 21 deletions
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7
components/script/dom/bindings/root.rs
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@ -33,9 +33,8 @@ use crate::dom::node::Node;
use js::jsapi::{Heap, JSObject, JSTracer};
use js::rust::GCMethods;
use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
use mitochondria::OnceCell;
use script_layout_interface::TrustedNodeAddress;
use std::cell::{Cell, UnsafeCell};
use std::cell::{Cell, OnceCell, UnsafeCell};
use std::default::Default;
use std::hash::{Hash, Hasher};
use std::marker::PhantomData;
@ -718,7 +717,7 @@ where
F: FnOnce() -> DomRoot<T>,
{
assert_in_script();
&self.ptr.init_once(|| Dom::from_ref(&cb()))
&self.ptr.get_or_init(|| Dom::from_ref(&cb()))
}
}
@ -742,7 +741,7 @@ impl<T: DomObject> MallocSizeOf for DomOnceCell<T> {
#[allow(unrooted_must_root)]
unsafe impl<T: DomObject> JSTraceable for DomOnceCell<T> {
unsafe fn trace(&self, trc: *mut JSTracer) {
if let Some(ptr) = self.ptr.as_ref() {
if let Some(ptr) = self.ptr.get() {
ptr.trace(trc);
}
}