commit | e8cba6918a23cc46ebfb7c83c7439f3abc0aa973 | [log] [tgz] |
---|---|---|
author | Scott Haseley <shaseley@chromium.org> | Fri Jan 06 16:59:35 2023 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Fri Jan 06 17:07:25 2023 |
tree | 224969e8742627a5cda9b9690c64d64bdc810363 | |
parent | 522047d2680b8a25480d53d1ee7161a60b3fe748 [diff] |
[dom] Implement AbortSignal.any() prototype This adds the basic functionality for AbortSignal.any(), which creates a new signal that will be aborted if any of the signals associated signals are aborted. The API is implemented behind a flag. The general idea and concepts are: - A signal created with this API is a "composite signal", composed of 0 or more "abort sources". - An abort source can be any AbortSignal, but since the relationships are established at signal creation time, we can link to non-composite signals, i.e. those associated with a controller. - If any of the abort sources are already aborted when this API is called, it returns an aborted signal (with the culprit's reason). - During SignalAbort, a signal will invoke SignalAbort on all of its "dependent signals" (those for which it is a source). Most of this is implemented by AbortSignalCompositionManager. In this CL this class handles linking source/dependent abort signals, but in follow-up CLs this will also: 1. Also manage priority sources for composite TaskSignals, which are created by a specialization for TaskSignal.any(). The logic for managing abort and priority sources/dependents is the same, so this setup is optimized for code reuse. Note also that the WPT tests for for AbortSignal.any() are implemented in resources/ and pulled in via META statements for reuse with TaskSignal.any(). 2. Handle more complex memory management. Memory leaks can result from composite signals following long-lived top-level signals, which we expect to be a common pattern and part of the motivation for the UA maintaining the signal relationships. This is separated out to keep CLs smaller. Explainer: https://github.com/shaseley/abort-signal-any I2P: https://groups.google.com/a/chromium.org/g/blink-dev/c/FSH6hrJMaxM/m/Ft8KiGlbAAAJ Design doc: https://docs.google.com/document/d/1LvmsBLV85p-PhSGvTH-YwgD6onuhh1VXLg8jPlH32H4/edit?usp=sharing Bug: 1323391 Change-Id: Ibc85815b166fd4242543f30600be99fadf35992e Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3703640 Reviewed-by: Nate Chapin <japhet@chromium.org> Reviewed-by: Mason Freed <masonf@chromium.org> Commit-Queue: Scott Haseley <shaseley@chromium.org> Cr-Commit-Position: refs/heads/main@{#1089752}
The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.
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