feat(worker): accept platform options under ios, deprecate iosPriority - #470
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Worker options now carry iOS-specific settings in an `ios` namespace object:
new Worker("./w.js", { ios: { priority: "userInitiated" } })
`ios.priority` is validated strictly — a non-object `ios`, a non-string
priority or an unrecognized priority name throws a TypeError — while unknown
keys inside `ios` are ignored so later options can be added without breaking
older runtimes.
`iosPriority` stays supported with its lenient behavior and logs a one-time
deprecation warning; `ios.priority` takes precedence when both are given.
The quality of service is carried as `std::optional<int>` so an explicit
"default" is distinguishable from no option at all.
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Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughChangesThe worker runtime now parses and validates iOS quality-of-service options. It represents absent values with Worker quality-of-service options
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This adds validated iOS Worker priority options while preserving legacy behavior and platform-default scheduling when no priority is supplied. The change is covered by the iOS simulator test suite with no reported failures. Sequence Diagram(s)sequenceDiagram
participant WorkerConstructor
participant ParseQualityOfService
participant WorkerWrapperStart
participant NSBlockOperation
WorkerConstructor->>ParseQualityOfService: parse iOS worker options
ParseQualityOfService-->>WorkerConstructor: return optional qualityOfService
WorkerConstructor->>WorkerWrapperStart: pass optional qualityOfService
WorkerWrapperStart->>NSBlockOperation: set qualityOfService when present
Suggested reviewers: Poem
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✅ Passed checks (4 passed)
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Inline comments:
In `@NativeScript/runtime/Worker.mm`:
- Around line 58-59: Update ParseQualityOfService and ConstructorCallback so
failures from ios, ios.priority, or iosPriority property access return a
distinct parse-failure status rather than being treated as absent values;
preserve the pending V8 exception and exit ConstructorCallback before
WorkerWrapper allocation or Start. Add coverage for throwing getters and Proxy
traps, verifying the original error propagates and the worker entry script does
not execute.
In `@TestRunner/app/tests/WorkerOptionsTests.js`:
- Around line 27-32: Update both Worker callback handlers in the async spec so
their assertions and existing logic execute within try/finally, with finish()
called from finally in onmessage and onerror; preserve the current assertions
and ensure worker termination still occurs when either callback throws.
- Line 72: Update the QoS assertion in the no-options test around
WorkerWrapper::Start to compare qos with NSQualityOfService.Background, rather
than only checking that qos is numeric. Preserve the existing test setup and
verify the queue uses the default Background QoS.
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Run ID: eb45aa8f-0906-40d5-bb86-2164a44359a8
📒 Files selected for processing (6)
NativeScript/runtime/DataWrapper.hNativeScript/runtime/Worker.mmNativeScript/runtime/WorkerWrapper.mmTestRunner/app/tests/WorkerOptionsTests.jsTestRunner/app/tests/index.jsTestRunner/app/tests/workerOptions/qosWorker.js
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1 participant
What changed
new Worker(url, options)now takes its iOS-specific settings under aniosnamespace object, so future platform options have a place to live instead of
accumulating as
iosSomethingkeys on the top level.ios.priorityaccepts exactly"userInteractive","userInitiated","default","utility"and"background", and maps to the matchingNSQualityOfServiceon the worker thread.Deprecation
options.iosPrioritykeeps working unchanged, including its lenient handling ofunrecognized values (they are ignored, not fatal). Passing it logs a one-time
per-process warning pointing at
ios.priority. When both keys are present,ios.prioritywins.Validation
iospresent and not an object (nullcounts as absent, as for a WebIDL dictionary)TypeErrorios.prioritynot a stringTypeErrornaming"ios.priority"ios.priorityan unknown stringTypeErrornaming"ios.priority"iosiosPrioritywith an unknown valueThe thrown value is a genuine
TypeErrorinstance, soe instanceof TypeErrorholds in JS.
Along the way,
"default"now actually reaches the thread: the quality ofservice was carried as an
intwhose "unset" sentinel was-1, which is alsothe value of
NSQualityOfServiceDefault, so an explicit"default"wasindistinguishable from passing no option at all. It is now a
std::optional<int>.Verification
TestRunner suite, Debug, iOS Simulator.
That is the 1513-test baseline plus the 12 specs added here; the skips are unchanged.
Follow-ups
@nativescript/coretypings forWorkerOptionsneedios?: { priority?: "userInteractive" | "userInitiated" | "default" | "utility" | "background" }, withiosPrioritymarked@deprecated.resourceLimits.Summary by CodeRabbit
New Features
ios.priority.iosPriorityoption, withios.prioritytaking precedence.Bug Fixes
Tests