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doAbortable
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| export default async function doAbortable<R>( | |
| signal: AbortSignal | undefined, | |
| func: (abortSignal: AbortSignal) => R | Promise<R>, | |
| ): Promise<R> { | |
| const controller = new AbortController(); | |
| const abortInner = () => controller.abort(); | |
| if (signal?.aborted) { | |
| abortInner(); | |
| } else { | |
| signal?.addEventListener("abort", abortInner, { once: true }); | |
| } | |
| try { | |
| return await func(controller.signal); | |
| } finally { | |
| // remove listener from the original signal, this allows our local controller | |
| // to be collected as there are no longer any references to it, by consequence | |
| // this allows the inner signal to be collectable as long as no references remain | |
| signal?.removeEventListener("abort", abortInner); | |
| } | |
| } |
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| import doAbortable from "./doAbortable.ts"; | |
| import AbortError from "./AbortError.ts"; | |
| export default function delay(time: number, abortSignal?: AbortSignal): Promise<void> { | |
| return doAbortable(abortSignal, abortSignal => { | |
| return new Promise((resolve, reject) => { | |
| if (abortSignal.aborted) { reject(new AbortError()) } | |
| const timeout = setTimeout(resolve, time); | |
| abortSignal.addEventListener('abort', () => { | |
| clearTimeout(timeout); | |
| reject(new AbortError()); | |
| }, { once: true }); | |
| }); | |
| }); | |
| } |
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