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script: Move TaskManager to GlobalScope (#34827)

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This is a simplification of the internal `TaskQueue` API that moves the
`TaskManager` to the `GlobalScope` itself. In addition, the handling of
cancellers is moved to the `TaskManager` as well. This means that no
arguments other than the `task` are necessary for queueing tasks, which
makes the API a lot easier to use and cleaner.

`TaskSource` now also keeps a copy of the canceller with it, so that
they always know the proper way to cancel any tasks queued on them.

There is one complication here. The event loop `sender` for dedicated
workers is constantly changing as it is set to `None` when not handling
messages. This is because this sender keeps a handle to the main
thread's `Worker` object, preventing garbage collection while any
messages are still in flight or being handled. This change allows
setting the `sender` on the `TaskManager` to `None` to allow proper
garbabge collection.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-01-04 09:41:50 +01:00 • committed by GitHub
parent 75a22cfe2e
commit b2eda71952
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54 changed files with 1060 additions and 1516 deletions
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15
components/script/dom/analysernode.rs
View file

@ -110,22 +110,17 @@ impl AnalyserNode {
) -> Fallible<DomRoot<AnalyserNode>> {
let (node, recv) = AnalyserNode::new_inherited(window, context, options)?;
let object = reflect_dom_object_with_proto(Box::new(node), window, proto, can_gc);
let (source, canceller) = window
.task_manager()
.dom_manipulation_task_source_with_canceller();
let task_source = window.task_manager().dom_manipulation_task_source();
let this = Trusted::new(&*object);
ROUTER.add_typed_route(
recv,
Box::new(move |block| {
let this = this.clone();
let _ = source.queue_with_canceller(
task!(append_analysis_block: move || {
let this = this.root();
this.push_block(block.unwrap())
}),
&canceller,
);
let _ = task_source.queue(task!(append_analysis_block: move || {
let this = this.root();
this.push_block(block.unwrap())
}));
}),
);
Ok(object)