[Merged by Bors] - Prepare Promises for new host hooks and job queue API
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jedel1043
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enhancement
jedel1043
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Razican,
jasonwilliams,
HalidOdat,
RageKnify,
raskad and
nekevss
Test262 conformance changes
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Codecov Report
@@ Coverage Diff @@
## main #2528 +/- ##
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+ Coverage 50.36% 51.17% +0.80%
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Files 362 373 +11
Lines 36691 36349 -342
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+ Hits 18481 18601 +120
+ Misses 18210 17748 -462
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Co-authored-by: raskad <[email protected]>
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Jan 14, 2023
As part of the new modules PR, I was working on implementing the [host hooks](https://tc39.es/ecma262/#sec-host-hooks-summary) for the module import hooks and custom job queues. However, the promises module needed a bit of a refactor in order to couple with the new API. So, I thought it was a good idea to separate the promises refactor into its own PR, since the other PR is already big as it is. - Replaced some usages of `JobCallback` with a new `NativeJob` that isn't traced by the GC, since those closures are always rooted and executed by the `Context` globally. This will also allow hosts to pass their custom jobs to the job queue, and maybe could also accept futures in the Future (pun intended 😆). - Refactored several functions to account for the `HostPromiseRejectionTracker` hook which needs the promise `JsObject`. - Rewrote some patterns with newer Rust idioms.
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Promises for new host hooks and job queue APIPromises for new host hooks and job queue API
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Jan 19, 2023
Follows from #2528, and should complement #2411 to implement the module import hooks. ~~Similarly to the Intl/ICU4X PR (#2478), this has a lot of trivial changes caused by the new lifetimes. I thought about passing the queue and the hooks by value, but it was very painful having to wrap everything with `Rc` in order to be accessible by the host. In contrast, `&dyn` can be easily provided by the host and has the advantage of not requiring additional allocations, with the downside of adding two more lifetimes to our `Context`, but I think it's worth.~~ I was able to unify all lifetimes into the shortest one of the three, making our API just like before! Changes: - Added a new `HostHooks` trait and a `&dyn HostHooks` field to `Context`. This allows hosts to implement the trait for their custom type, then pass it to the context. - Added a new `JobQueue` trait and a `&dyn JobQueue` field to our `Context`, allowing custom event loops and other fun things. - Added two simple implementations of `JobQueue`: `IdleJobQueue` which does nothing and `SimpleJobQueue` which runs all jobs until all successfully complete or until any of them throws an error. - Modified `boa_cli` to run all jobs until the queue is empty, even if a job returns `Err`. This also prints all errors to the user.
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As part of the new modules PR, I was working on implementing the host hooks for the module import hooks and custom job queues. However, the promises module needed a bit of a refactor in order to couple with the new API. So, I thought it was a good idea to separate the promises refactor into its own PR, since the other PR is already big as it is.
JobCallbackwith a newNativeJobthat isn't traced by the GC, since those closures are always rooted and executed by theContextglobally. This will also allow hosts to pass their custom jobs to the job queue, and maybe could also accept futures in the Future (pun intended 😆).HostPromiseRejectionTrackerhook which needs the promiseJsObject.