Method ThreadGroup

include/dmlc/thread_group.h:310–313

! * \brief Constructor */

   * \brief Constructor
   */
  inline ThreadGroup()
    : evEmpty_(std::make_shared<ManualEvent>()) {
    evEmpty_->signal();  // Starts out empty
  }

  /*!
   * \brief Destructor, perform cleanup. All child threads will be exited when this