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implement CachedFrozenArray (#34145)
* extract code into CachedFrozenArray Signed-off-by: Gae24 <96017547+Gae24@users.noreply.github.com> * fix borrow crash Signed-off-by: Gae24 <96017547+Gae24@users.noreply.github.com> * fix already borrowed error using an else will cause the borrow to live more than it needs Signed-off-by: Gae24 <96017547+Gae24@users.noreply.github.com> * restore return statement Signed-off-by: Gae24 <96017547+Gae24@users.noreply.github.com> --------- Signed-off-by: Gae24 <96017547+Gae24@users.noreply.github.com>
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5 changed files with 98 additions and 76 deletions
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@ -8,17 +8,16 @@ use js::jsval::JSVal;
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use js::rust::{HandleObject, HandleValue, MutableHandleValue};
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use servo_atoms::Atom;
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use crate::dom::bindings::cell::DomRefCell;
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use crate::dom::bindings::codegen::Bindings::ExtendableEventBinding::ExtendableEvent_Binding::ExtendableEventMethods;
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use crate::dom::bindings::codegen::Bindings::ExtendableMessageEventBinding;
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use crate::dom::bindings::codegen::Bindings::ExtendableMessageEventBinding::ExtendableMessageEventMethods;
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use crate::dom::bindings::error::Fallible;
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use crate::dom::bindings::frozenarray::CachedFrozenArray;
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use crate::dom::bindings::inheritance::Castable;
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use crate::dom::bindings::reflector::reflect_dom_object_with_proto;
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use crate::dom::bindings::root::{Dom, DomRoot};
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use crate::dom::bindings::str::DOMString;
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use crate::dom::bindings::trace::RootedTraceableBox;
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use crate::dom::bindings::utils::to_frozen_array;
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use crate::dom::event::Event;
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use crate::dom::eventtarget::EventTarget;
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use crate::dom::extendableevent::ExtendableEvent;
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@ -42,7 +41,7 @@ pub struct ExtendableMessageEvent {
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/// <https://w3c.github.io/ServiceWorker/#dom-extendablemessageevent-ports>
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ports: Vec<Dom<MessagePort>>,
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#[ignore_malloc_size_of = "mozjs"]
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frozen_ports: DomRefCell<Option<Heap<JSVal>>>,
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frozen_ports: CachedFrozenArray,
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}
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#[allow(non_snake_case)]
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@ -61,7 +60,7 @@ impl ExtendableMessageEvent {
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.into_iter()
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.map(|port| Dom::from_ref(&*port))
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.collect(),
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frozen_ports: DomRefCell::new(None),
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frozen_ports: CachedFrozenArray::new(),
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}
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}
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@ -208,25 +207,16 @@ impl ExtendableMessageEventMethods for ExtendableMessageEvent {
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}
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/// <https://w3c.github.io/ServiceWorker/#extendablemessage-event-ports>
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fn Ports(&self, cx: JSContext, mut retval: MutableHandleValue) {
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if let Some(ports) = &*self.frozen_ports.borrow() {
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retval.set(ports.get());
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return;
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}
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let ports: Vec<DomRoot<MessagePort>> = self
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.ports
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.iter()
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.map(|port| DomRoot::from_ref(&**port))
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.collect();
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to_frozen_array(ports.as_slice(), cx, retval);
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// Safety: need to create the Heap value in its final memory location before setting it.
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*self.frozen_ports.borrow_mut() = Some(Heap::default());
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self.frozen_ports
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.borrow()
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.as_ref()
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.unwrap()
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.set(retval.get());
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fn Ports(&self, cx: JSContext, retval: MutableHandleValue) {
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self.frozen_ports.get_or_init(
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|| {
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self.ports
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.iter()
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.map(|port| DomRoot::from_ref(&**port))
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.collect()
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},
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cx,
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retval,
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);
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}
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}
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