/* * Copyright (C) 2015, 2016, 2017, 2018, 2019 "IoT\.bzh" * Author "Romain Forlot" <romain.forlot@iot.bzh> * Author "Loïc Collignon" <loic.collignon@iot.bzh> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #pragma once #include <utility> #include <mutex> #include <queue> #include <thread> #include <linux/can.h> #include <condition_variable> #include "openxc.pb.h" #include "message/can-message.hpp" #include "../binding/low-can-subscription.hpp" #define CAN_ACTIVE_TIMEOUT_S 30 class diagnostic_manager_t; /// @brief Object used to handle decoding and manage event queue to be pushed. /// /// This object is also used to initialize can_bus_dev_t object after reading /// json conf file describing the CAN devices to use. Thus, those object will read /// on the device the CAN frame and push them into the can_bus_t can_message_q_ queue. /// /// That queue will later be decoded and pushed to subscribers. class can_bus_t { private: bool apply_filter(const openxc_VehicleMessage& vehicle_message, std::shared_ptr<low_can_subscription_t> can_subscription); void process_signals(std::shared_ptr<message_t> message, map_subscription& s); void process_diagnostic_signals(diagnostic_manager_t& manager, std::shared_ptr<message_t> can_message, map_subscription& s); void can_decode_message(); std::thread th_decoding_; ///< thread that will handle decoding a can frame bool is_decoding_ = false; ///< boolean member controling thread while loop void can_event_push(); std::thread th_pushing_; ///< thread that will handle pushing decoded can frame to subscribers bool is_pushing_ = false; ///< boolean member controling thread while loop std::condition_variable new_can_message_cv_; ///< condition_variable use to wait until there is a new CAN message to read std::mutex can_message_mutex_; ///< mutex protecting the can_message_q_ queue. std::queue <std::shared_ptr<message_t>> can_message_q_; ///< queue that will store can_message_t to be decoded std::condition_variable new_decoded_can_message_; ///< condition_variable use to wait until there is a new vehicle message /// to read from the queue vehicle_message_q_ std::mutex decoded_can_message_mutex_; ///< mutex protecting the vehicle_message_q_ queue. std::queue <std::pair<int, openxc_VehicleMessage> > vehicle_message_q_; ///< queue that will store openxc_VehicleMessage to be pushed std::vector<std::pair<std::string, std::string> > can_devices_mapping_; ///< can_devices_mapping_ - holds a mapping between logical CAN devices names and linux CAN devices names. public: explicit can_bus_t(); can_bus_t(can_bus_t&&); ~can_bus_t(); void set_can_devices(json_object *mapping); void set_can_devices(const std::vector<std::pair<std::string, std::string> >& mapping); int get_can_device_index(const std::string& bus_name) const; const std::string get_can_device_name(const std::string& id_name) const; void start_threads(); void stop_threads(); std::shared_ptr<message_t> next_can_message(); void push_new_can_message(std::shared_ptr<message_t> can_msg); std::mutex& get_can_message_mutex(); std::condition_variable& get_new_can_message_cv(); std::pair<int, openxc_VehicleMessage> next_vehicle_message(); void push_new_vehicle_message(int subscription_id, const openxc_VehicleMessage& v_msg); };