DMleadgen
46d973904b
Next.js website for Rocky Mountain Vending company featuring: - Product catalog with Stripe integration - Service areas and parts pages - Admin dashboard with Clerk authentication - SEO optimized pages with JSON-LD structured data Co-authored-by: Cursor <cursoragent@cursor.com>
51 lines
1.1 KiB
Text
51 lines
1.1 KiB
Text
/**
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* @license
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* Copyright 2024 Google Inc.
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* SPDX-License-Identifier: Apache-2.0
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*/
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import {Deferred} from './Deferred.js';
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import {disposeSymbol} from './disposable.js';
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/**
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* @internal
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*/
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export class Mutex {
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static Guard = class Guard {
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#mutex: Mutex;
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#onRelease?: () => void;
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constructor(mutex: Mutex, onRelease?: () => void) {
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this.#mutex = mutex;
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this.#onRelease = onRelease;
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}
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[disposeSymbol](): void {
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this.#onRelease?.();
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return this.#mutex.release();
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}
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};
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#locked = false;
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#acquirers: Array<() => void> = [];
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// This is FIFO.
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async acquire(
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onRelease?: () => void,
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): Promise<InstanceType<typeof Mutex.Guard>> {
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if (!this.#locked) {
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this.#locked = true;
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return new Mutex.Guard(this);
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}
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const deferred = Deferred.create<void>();
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this.#acquirers.push(deferred.resolve.bind(deferred));
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await deferred.valueOrThrow();
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return new Mutex.Guard(this, onRelease);
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}
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release(): void {
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const resolve = this.#acquirers.shift();
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if (!resolve) {
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this.#locked = false;
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return;
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}
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resolve();
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}
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}
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