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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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26
components/script/dom/audioscheduledsourcenode.rs
View file

@ -71,25 +71,15 @@ impl AudioScheduledSourceNodeMethods<crate::DomTypeHolder> for AudioScheduledSou
}
let this = Trusted::new(self);
let global = self.global();
let window = global.as_window();
let (task_source, canceller) = window
.task_manager()
.dom_manipulation_task_source_with_canceller();
let task_source = self.global().task_manager().dom_manipulation_task_source();
let callback = OnEndedCallback::new(move || {
let _ = task_source.queue_with_canceller(
task!(ended: move || {
let this = this.root();
let global = this.global();
let window = global.as_window();
window.task_manager().dom_manipulation_task_source().queue_simple_event(
this.upcast(),
atom!("ended"),
window
);
}),
&canceller,
);
let _ = task_source.queue(task!(ended: move || {
let this = this.root();
this.global().task_manager().dom_manipulation_task_source().queue_simple_event(
this.upcast(),
atom!("ended"),
);
}));
});
self.node()