| 1 | import { useEffect } from "react"; |
| 2 | import { AppState } from "react-native"; |
| 3 | import { scheduleOnUI } from "react-native-worklets"; |
| 4 | |
| 5 | function collectUiRuntimeGarbage() { |
| 6 | "worklet"; |
| 7 | // Hermes exposes `gc` on the worklets UI runtime; skip quietly on runtimes that do not. |
| 8 | const gc = (globalThis as { gc?: () => void }).gc; |
| 9 | if (typeof gc === "function") gc(); |
| 10 | } |
| 11 | |
| 12 | /** |
| 13 | * React Native only collects the main JS runtime on an iOS memory warning. The |
| 14 | * worklets UI runtime is a separate Hermes heap that holds native shadow nodes and |
| 15 | * serializables alive until its own GC runs, so collect it on the same warning. |
| 16 | */ |
| 17 | export function useUiRuntimeMemoryWarningGc() { |
| 18 | useEffect(() => { |
| 19 | const subscription = AppState.addEventListener("memoryWarning", () => { |
| 20 | scheduleOnUI(collectUiRuntimeGarbage); |
| 21 | }); |
| 22 | return () => subscription.remove(); |
| 23 | }, []); |
| 24 | } |