Function watchdogTimer

packages/core/src/utils/anr.ts:21–54

(
  createTimer: CreateTimerImpl,
  pollInterval: number,
  anrThreshold: number,
  callback: () => void,
)

 * @returns An object with `poll` and `enabled` functions {@link WatchdogReturn}
 */
export function watchdogTimer(
  createTimer: CreateTimerImpl,
  pollInterval: number,
  anrThreshold: number,
  callback: () => void,
): WatchdogReturn {
  const timer = createTimer();
  let triggered = false;
  let enabled = true;

  setInterval(() => {
    const diffMs = timer.getTimeMs();

    if (triggered === false && diffMs > pollInterval + anrThreshold) {
      triggered = true;
      if (enabled) {
        callback();
      }
    }

    if (diffMs < pollInterval + anrThreshold) {
      triggered = false;
    }
  }, 20);

  return {
    poll: () => {
      timer.reset();
    },
    enabled: (state: boolean) => {
      enabled = state;
    },
  };
}

// types copied from inspector.d.ts
interface Location {