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Chris Bracken cdc18f9d61 Add FlutterTaskRunnerDescription.destruction_callback (flutter/engine#56445) 
Adds a `destruction_callback` member to `FlutterTaskRunnerDescription` that provides embedder developers a means of performing any cleanup of resources tied to the lifetime of the task runner.

In the case of the macOS embedder, the task runner holds a reference to the engine itself that is used in the `post_task_callback` and whose lifetime needs to match/exceed that of the task runner. This refactoring allows us to centralise all related retain count manipulation around task runner setup.

This is a refactor of the lifecycle bits of https://github.com/flutter/engine/pull/13300.

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
2024-11-08 20:07:11 +00:00
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src/flutter
Add FlutterTaskRunnerDescription.destruction_callback (flutter/engine#56445)
2024-11-08 20:07:11 +00:00