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Kelvin Amoaba
41867a2a85
* perf(mobile): back off spare page refills after an unclaimed drop or memory warning * fix(mobile): skip a spare whose store read outlived an unclaimed drop * fix(mobile): arm the spare refill timer on whole milliseconds
29 lines
1.3 KiB
TypeScript
29 lines
1.3 KiB
TypeScript
import { requireOptionalNativeModule } from 'expo-modules-core'
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type SpareDocumentModule = {
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prepareSpareDocument?: (directory: string, sessionId: string) => Promise<boolean>
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claimSpareDocument?: (directory: string) => Promise<string | null>
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discardSpareDocument?: () => Promise<void>
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}
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// A binary built before the spare existed has the module without these functions.
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const spareModule = (): SpareDocumentModule | null =>
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requireOptionalNativeModule<SpareDocumentModule>('OrcaMobileWebShell')
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// Boot a page from `directory` under `sessionId` and park it, invisible, until a screen claims it.
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// False when native declined: a phone under 4 GB, the app not active, a page document shown, or an iOS
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// memory warning in the last few minutes.
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export async function prepareSpareDocument(directory: string, sessionId: string): Promise<boolean> {
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return (await spareModule()?.prepareSpareDocument?.(directory, sessionId)) ?? false
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}
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// The parked spare's session id when it was booted from `directory`, handed out once. The view
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// mounted under that id adopts the booted page.
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export async function claimSpareDocument(directory: string): Promise<string | null> {
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return (await spareModule()?.claimSpareDocument?.(directory)) ?? null
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}
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export async function discardSpareDocument(): Promise<void> {
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await spareModule()?.discardSpareDocument?.()
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}
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