Simple lock implementation

lock.ts

    let releaseGlobalsPromise: null | Promise<void> = null;
    async function acquireGlobalsLock() {
      while (releaseGlobalsPromise) {
        await releaseGlobalsPromise;
      }
      let release!: () => void;
      releaseGlobalsPromise = new Promise(
        (resolve) =>
          (release = () => {
            releaseGlobalsPromise = null;
            resolve();
          }),
      );
      return release;
    }