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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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4
components/script/dom/performance.rs
View file

@ -247,7 +247,7 @@ impl Performance {
let task = task!(notify_performance_observers: move || {
owner.root().notify_observers();
});
let _ = task_source.queue(task, global);
let _ = task_source.queue(task);
}
}
let mut observers = self.observers.borrow_mut();
@ -334,7 +334,7 @@ impl Performance {
let task = task!(notify_performance_observers: move || {
owner.root().notify_observers();
});
let _ = task_source.queue(task, global);
let _ = task_source.queue(task);
Some(entry_last_index)
}