Method TryPop

include/singa/utils/safe_queue.h:159–167

* Try to pop an element from the queue. * @return false if the queue is empty now. */

   * @return false if the queue is empty now.
   */
  bool TryPop(T& e) {
    Element ele;
    if (queue_.TryPop(ele)) {
      e = ele.data;
      return true;
    } else {
      return false;
    }
  }

  /**
   * @return Number of elements in the queue.