Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | 1x 1x 1x 2x 2x 1x 10x 10x 1x 1x 9x 9x 9x 9x 1x 10x 10x 10x 1x 1x 9x 9x 1x 1x | import dbg from 'debug'; const debug = dbg('node-expose-sspi:mutex'); type ReleaseFn = () => void; interface Task { resolve(releaseFn: ReleaseFn): void; } export class Mutex { private isBusy = false; private queue: Task[] = []; private onRelease(): void { debug('release'); if (this.queue.length === 0) { this.isBusy = false; return; } const { resolve } = this.queue.shift() as Task; debug('decrease queue size', this.queue.length); this.isBusy = true; resolve(this.onRelease.bind(this)); } async acquire(): Promise<ReleaseFn> { return new Promise((resolve) => { debug('acquire'); if (!this.isBusy) { this.isBusy = true; return resolve(this.onRelease.bind(this)); } this.queue.push({ resolve }); debug('increase queue size', this.queue.length); }); } } export const activeDirectoryMutex = new Mutex(); |