ROS 单线程与多线程

参考资料:

https://www.cnblogs.com/liu-fa/p/5925381.html

https://www.cnblogs.com/feixiao5566/p/5288206.html

http://wiki.ros.org/roscpp/Overview/Callbacks%20and%20Spinning

https://blog.csdn.net/shiyue0010/article/details/51945444

https://blog.csdn.net/xuehuafeiwu123/article/details/68922969

ROS多进程回调的实现 ROS Using different ros::CallbackQueue: https://www.cnblogs.com/siahekai/p/5840313.html

https://blog.csdn.net/yaked/article/details/50776224