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/**
* Copyright 2020 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @internal
*/
export class TaskQueue {
#chain: Promise<void>;
constructor() {
this.#chain = Promise.resolve();
}
postTask<T>(task: () => Promise<T>): Promise<T> {
const result = this.#chain.then(task);
this.#chain = result.then(
() => {
return undefined;
},
() => {
return undefined;
}
);
return result;
}
}
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