Method Pop

paddle/fluid/framework/blocking_queue.h:94–100

  }

  T Pop() {
    std::unique_lock<std::mutex> lock(mutex_);
    cv_.wait(lock, [=] { return !q_.empty(); });
    T rc(std::move(q_.front()));
    q_.pop_front();
    return rc;
  }

  void Pop(T *t) {
    std::unique_lock<std::mutex> lock(mutex_);