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Liam Appelbe 27ca389132 Experimental platform isolates API (flutter/engine#48551 )

This is a prototype of the [PlatformIsolate
API](https://github.com/flutter/flutter/issues/136314).

**UPDATE (Jan 25):** The PR is ready for review. PTAL.

The `PlatformIsolate` creation flow is:

1. `PlatformIsolate.spawn` running on parent isolate
(platform_isolate.dart)
    a. Create `isolateReadyPort`
    b. `PlatformIsolateNativeApi::Spawn` (platform_isolate.cc)
    c. `DartIsolate::CreatePlatformIsolate` (dart_isolate.cc)
d. Isolate created. Entry point invocation task dispatched to platform
thread
    e. `PlatformIsolate.spawn` returns a `Future<Isolate>`
2. On the platform thread, `_platformIsolateMain` is invoked in the
platform isolate
    a. Create `entryPointPort`
b. Send `Isolate.current` metadata and `entryPointPort` back to the
parent isolate via `isolateReadyPort`
3. Back in the parent isolate, `isolateReadyPort.handler` is invoked
a. Send the user's `entryPoint` and `message` to the platform isolate
via `entryPointPort`
b. Use received isolate metadata to create a new `Isolate` representing
the platform isolate and complete the `Future<Isolate>`
4. In the platform isolate, `entryPointPort.handler` is invoked
    a. Run the user's `entryPoint(message)`

The engine shutdown flow is handled by `PlatformIsolateManager`, which
maintains a set of running platform isolates.

2024-03-04 16:47:41 +13:00

graphics

Move vulkan-deps to //flutter/third_party/vulkan-deps (flutter/engine#51013 )

2024-02-27 21:59:00 +00:00

BUILD.gn

…

config.gni

Bundle flutter.js via esbuild (flutter/engine#47573 )

2023-11-03 20:24:29 +00:00

constants.h

Basic view management for engine classes (flutter/engine#42991 )

2023-08-17 20:06:25 +00:00