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/*
This file is part of GNU Taler
(C) 2022 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* API to access the Taler crypto worker thread.
* @author Florian Dold
*/
import type {
CryptoWorker,
CryptoWorkerFactory,
} from "@gnu-taler/taler-wallet-core";
export class BrowserCryptoWorkerFactory implements CryptoWorkerFactory {
startWorker(): CryptoWorker {
const workerCtor = Worker;
const workerPath = "/dist/browserWorkerEntry.js";
// FIXME: This is not really the same interface as the crypto worker!
// We need to wrap it.
return new workerCtor(workerPath) as CryptoWorker;
}
getConcurrency(): number {
let concurrency = 2;
try {
// only works in the browser
// tslint:disable-next-line:no-string-literal
concurrency = (navigator as any)["hardwareConcurrency"];
concurrency = Math.max(1, Math.ceil(concurrency / 2));
} catch (e) {
concurrency = 2;
}
return concurrency;
}
}
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