完成定时功能的类

class OnTime {
 public:
      OnTime(uint32_t time, bool mark) : time_(time), mark_(mark) {}
      bool TimeIsUp(uint32_t cur_time) {
          if (cur_time < time_) {
              mark_ = false;
              return false;
          }

          if (cur_time >= time_ && mark_ == false) {
              mark_ = true;
              return true;
          }
          return false;
      }
 private:
    uint32_t time_;
    bool mark_;

};

如果程序启动，已经过了更新时间，如果还想补上更新那么将mark初始化为false.