[SE-0371] Back-deploy support for main-actor-isolated deinit #82661
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When targeting a platform that predates the introduction of isolated deinit, make a narrow exception that allows main-actor-isolated deinit to work through a special, inlineable entrypoint that is back-deployed. This implementation 1. Calls into the real implementation when available, otherwise 2. Checks if we're on the main thread, destroying immediately when we are, otherwise 3. Creates a new task on the main actor to handle destruction. This implementation is less efficient than the implementation in the runtime, but allows us to back-deploy this functionality as far back as concurrency goes. Fixes rdar://151029118.
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Jul 1, 2025
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… task-to-thread model
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When targeting a platform that predates the introduction of isolated deinit, make a narrow exception that allows main-actor-isolated deinit to work through a special, inlineable entrypoint that is back-deployed. This implementation
This implementation is less efficient than the implementation in the runtime, but allows us to back-deploy this functionality as far back as concurrency goes.
Fixes rdar://151029118.