31 lines
1.1 KiB
TypeScript
31 lines
1.1 KiB
TypeScript
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// Copyright 2022 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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import {Device} from "pigweedjs";
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import {createDefaultProtoCollection} from "./protos";
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/**
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* Returns an instance of Device, ensures there is only one Device in
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* current session.
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*
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* We do this to avoid multiple clients listening on single serial port.
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*/
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export default async function SingletonDevice(): Promise<Device> {
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if ((window as any).device === undefined) {
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const protoCollection = await createDefaultProtoCollection();
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(window as any).device = new Device(protoCollection);
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}
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return (window as any).device;
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}
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