homebridge-econet-rheem/dist/tools/mutex.js

Homebridge plugin for control of Rheem and Ruud thermostats and water heaters

export class Mutex {
    _lock = Promise.resolve();
    async lock(fn) {
        const prev = this._lock;
        let release;
        this._lock = new Promise(r => release = r);
        await prev;
        try {
            return await fn();
        }
        finally {
            release();
        }
    }
}
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