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+/*
+ * Copyright (C) 2015, 2016, 2017 "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 <mutex>
+#include <queue>
+#include <thread>
+#include <linux/can.h>
+#include <condition_variable>
+
+#include "openxc.pb.h"
+#include "can-message.hpp"
+#include "can-bus-dev.hpp"
+#include "../diagnostic/active-diagnostic-request.hpp"
+
+#include "../low-can-binding.hpp"
+
+// TODO actual max is 32 but dropped to 24 for memory considerations
+#define MAX_ACCEPTANCE_FILTERS 24
+// TODO this takes up a ton of memory
+#define MAX_DYNAMIC_MESSAGE_COUNT 12
+
+#define CAN_ACTIVE_TIMEOUT_S 30
+
+/// @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 be later used to be decoded and pushed to subscribers.
+class can_bus_t
+{
+private:
+ int conf_file_; ///< configuration file handle used to initialize can_bus_dev_t objects.
+
+ void can_decode_message();
+ std::thread th_decoding_; ///< thread that'll 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'll 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 <can_message_t> can_message_q_; ///< queue that'll store can_message_t to 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 <openxc_VehicleMessage> vehicle_message_q_; ///< queue that'll store openxc_VehicleMessage to pushed
+
+ static std::map<std::string, std::shared_ptr<can_bus_dev_t>> can_devices_; ///< Can device map containing all can_bus_dev_t objects initialized during init_can_dev function
+
+public:
+ can_bus_t(int conf_file);
+ can_bus_t(can_bus_t&&);
+
+ int init_can_dev();
+ std::vector<std::string> read_conf();
+
+ void start_threads();
+ void stop_threads();
+
+ int process_can_signals(can_message_t& can_message);
+ int process_diagnostic_signals(diagnostic_manager_t& manager, const can_message_t& can_message);
+
+ can_message_t next_can_message();
+ void push_new_can_message(const can_message_t& can_msg);
+ std::mutex& get_can_message_mutex();
+ std::condition_variable& get_new_can_message_cv();
+
+ openxc_VehicleMessage next_vehicle_message();
+ void push_new_vehicle_message(const openxc_VehicleMessage& v_msg);
+
+ const std::map<std::string, std::shared_ptr<can_bus_dev_t>>& get_can_devices() const;
+ static std::shared_ptr<can_bus_dev_t> get_can_device(std::string bus);
+};