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constellation: join on script-threads (#38424)

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We currently send exit signals to script-threads, and we also join on
the BHM worker. This ensure the constellation shuts-down only after
script has dropped it's sender to the BHM worker. By joining on the
script-threads, we have a guarantee that they have exited(which is
stronger than having dropped their senders) by the time the
constellation exits.

Testing: Manually opened many tabs and closed the window, both in
single- and multi-process modes.
Fixes: Part of - https://github.com/servo/servo/issues/30849

---------

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>
This commit is contained in:
Gregory Terzian 2025-08-07 02:05:18 +08:00 • committed by GitHub
parent b23adab8a5
commit a99ad240a0
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5 changed files with 45 additions and 16 deletions
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3
components/shared/layout/lib.rs
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@ -15,6 +15,7 @@ use std::any::Any;
use std::collections::HashMap;
use std::sync::Arc;
use std::sync::atomic::{AtomicIsize, AtomicU64, Ordering};
use std::thread::JoinHandle;
use app_units::Au;
use atomic_refcell::AtomicRefCell;
@ -305,7 +306,7 @@ pub trait ScriptThreadFactory {
layout_factory: Arc<dyn LayoutFactory>,
system_font_service: Arc<SystemFontServiceProxy>,
load_data: LoadData,
);
) -> JoinHandle<()>;
}
#[derive(Clone, Default)]
pub struct OffsetParentResponse {