Function defaultTriggerAsyncIdScope

lib/internal/async_hooks.js:464–477

* Sets a default top level trigger ID to be used * @template {Array } T * @template {unknown} R * @param {number} triggerAsyncId * @param { (...T: args) => R } block * @param {T} args * @returns {R}

(triggerAsyncId, block, ...args)

 * @returns {R}
 */
function defaultTriggerAsyncIdScope(triggerAsyncId, block, ...args) {
  if (triggerAsyncId === undefined)
    return ReflectApply(block, null, args);
  // CHECK(NumberIsSafeInteger(triggerAsyncId))
  // CHECK(triggerAsyncId > 0)
  const oldDefaultTriggerAsyncId = async_id_fields[kDefaultTriggerAsyncId];
  async_id_fields[kDefaultTriggerAsyncId] = triggerAsyncId;

  try {
    return ReflectApply(block, null, args);
  } finally {
    async_id_fields[kDefaultTriggerAsyncId] = oldDefaultTriggerAsyncId;
  }
}

function hasHooks(key) {
  return async_hook_fields[key] > 0;