Method push

include/lbann/utils/threads/thread_safe_queue.hpp:70–85

@brief Adds a value to back of the queue */

  /** @brief Adds a value to back of the queue */
  void push(T value)
  {
    // Make the new data outside of the lock to minimize lock time
    auto new_value = std::make_unique<T>(std::move(value));
    auto new_node = std::make_unique<_Node>();

    // Adding to the queue only modifies the tail
    {
      std::lock_guard<std::mutex> lk(tail_mtx_);
      tail_->data_ = std::move(new_value);
      tail_->next_ = std::move(new_node);
      tail_ = tail_->next_.get();
    }
    // Update the condition variable (for wait_and_pop)
    data_available_.notify_one();
  }

  void wake_all(bool stop = false)
  {