Function initAsyncResource

lib/internal/timers.js:164–171

(resource, type)

const knownTimersById = { __proto__: null };

function initAsyncResource(resource, type) {
  const asyncId = resource[async_id_symbol] = newAsyncId();
  const triggerAsyncId =
    resource[trigger_async_id_symbol] = getDefaultTriggerAsyncId();
  resource[async_context_frame] = AsyncContextFrame.current();
  if (initHooksExist())
    emitInit(asyncId, type, triggerAsyncId, resource);
}

let warnedNegativeNumber = false;
let warnedNotNumber = false;