twist_mux.h
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00001 /*********************************************************************
00002  * Software License Agreement (CC BY-NC-SA 4.0 License)
00003  *
00004  *  Copyright (c) 2014, PAL Robotics, S.L.
00005  *  All rights reserved.
00006  *
00007  *  This work is licensed under the Creative Commons
00008  *  Attribution-NonCommercial-ShareAlike 4.0 International License.
00009  *
00010  *  To view a copy of this license, visit
00011  *  http://creativecommons.org/licenses/by-nc-sa/4.0/
00012  *  or send a letter to
00013  *  Creative Commons, 444 Castro Street, Suite 900,
00014  *  Mountain View, California, 94041, USA.
00015  *********************************************************************/
00016 
00017 /*
00018  * @author Enrique Fernandez
00019  * @author Siegfried Gevatter
00020  */
00021 
00022 #ifndef TWIST_MUX_H
00023 #define TWIST_MUX_H
00024 
00025 #include <ros/ros.h>
00026 #include <std_msgs/Bool.h>
00027 #include <geometry_msgs/Twist.h>
00028 
00029 #include <list>
00030 
00031 namespace twist_mux
00032 {
00033 
00034 // Forwarding declarations:
00035 class TwistMuxDiagnostics;
00036 struct TwistMuxDiagnosticsStatus;
00037 class VelocityTopicHandle;
00038 class LockTopicHandle;
00039 
00044 class TwistMux
00045 {
00046 public:
00047 
00048   // @todo use this type alias when the compiler supports this C++11 feat.
00049   //template<typename T>
00050   //using handle_container = std::list<T>;
00051   // @todo alternatively we do the following:
00052   typedef std::list<VelocityTopicHandle> velocity_topic_container;
00053   typedef std::list<LockTopicHandle>     lock_topic_container;
00054 
00055   TwistMux();
00056   ~TwistMux();
00057 
00058   bool hasPriority(const VelocityTopicHandle& twist);
00059 
00060   void publishTwist(const geometry_msgs::TwistConstPtr& msg);
00061 
00062   void updateDiagnostics(const ros::TimerEvent& event);
00063 
00064 protected:
00065 
00066   typedef TwistMuxDiagnostics       diagnostics_type;
00067   typedef TwistMuxDiagnosticsStatus status_type;
00068 
00069   ros::Timer diagnostics_timer_;
00070 
00071   static constexpr double DIAGNOSTICS_PERIOD = 1.0;
00072 
00079   // @todo use handle_container (see above)
00080   //handle_container<VelocityTopicHandle> velocity_hs_;
00081   //handle_container<LockTopicHandle> lock_hs_;
00082   boost::shared_ptr<velocity_topic_container> velocity_hs_;
00083   boost::shared_ptr<lock_topic_container>     lock_hs_;
00084 
00085   ros::Publisher cmd_pub_;
00086 
00087   geometry_msgs::Twist last_cmd_;
00088 
00089   template<typename T>
00090   void getTopicHandles(ros::NodeHandle& nh, ros::NodeHandle& nh_priv, const std::string& param_name, std::list<T>& topic_hs);
00091 
00092   int getLockPriority();
00093 
00094   boost::shared_ptr<diagnostics_type> diagnostics_;
00095   boost::shared_ptr<status_type>      status_;
00096 };
00097 
00098 } // namespace twist_mux
00099 
00100 #endif // TWIST_MUX_H


twist_mux
Author(s): Enrique Fernandez , Siegfried-A. Gevatter Pujals
autogenerated on Sat Jun 8 2019 20:13:46