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| 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 10x 10x 1x 1x 9x 9x 9x 9x 10x 10x 10x 1x 1x 9x 9x 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();
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