On a merged UI/platform thread, immediately execute platform message handlers and then run microtasks #55933
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…handlers and then run microtasks Shell::OnPlatformViewDispatchPlatformMessage is called on the platform thread and must invoke the message handler on the UI thread. If the platform and UI threads are merged, then the handler can be run immediately. The shell can then post an empty task to the UI thread to make the UI message loop run the task observer that drains the microtask queue. Fixes flutter/flutter#156595
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Testing: this will be tested by reverting flutter/flutter@f1f83aa and verifying that the |
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…m message handlers and then run microtasks (flutter/engine#55933)
…157163) flutter/engine@a9bd470...76d310e 2024-10-18 [email protected] On a merged UI/platform thread, immediately execute platform message handlers and then run microtasks (flutter/engine#55933) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
Shell::OnPlatformViewDispatchPlatformMessage is called on the platform thread and must invoke the message handler on the UI thread. If the platform and UI threads are merged, then the handler can be run immediately. The shell can then post an empty task to the UI thread to make the UI message loop run the task observer that drains the microtask queue.
Fixes flutter/flutter#156595