low-can-binding/utils/socketcan-j1939/socketcan-j1939-data.cpp

   1 /*
   2  * Copyright (C) 2018, 2019 "IoT.bzh"
   3  * Author "Arthur Guyader" <arthur.guyader@iot.bzh>
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *       http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18
  19 #include "socketcan-j1939-data.hpp"
  20 #include "socketcan-j1939-addressclaiming.hpp"
  21 #include "../../binding/application.hpp"
  22
  23 namespace utils
  24 {
  25         /**
  26          * @brief Open a socket for receive or send data
  27          *
  28          * @param device_name The device name to open the socket
  29          * @param pgn The pgn to receive only him
  30          * @return int Return the number of the socket
  31          */
  32         int socketcan_j1939_data_t::open(std::string device_name, pgn_t pgn)
  33         {
  34                 return socketcan_j1939_t::open(device_name, htole64(J1939_NAME_ECU), pgn, J1939_NO_ADDR);
  35         }
  36
  37         /**
  38          * @brief Write a message but check if the address claiming is operation before
  39          *
  40          * @param obj A j1939 message
  41          * @return int 0 if the write is ok
  42          */
  43         int socketcan_j1939_data_t::write_message(message_t& obj)
  44         {
  45                 std::unique_lock<std::mutex> lock(mutex_claiming_);
  46                 application_t &application = application_t::instance();
  47                 socketcan_j1939_addressclaiming_t *socket_addr_claimed = static_cast<socketcan_j1939_addressclaiming_t*>(application.get_socket_address_claiming().get());
  48                 while(socket_addr_claimed->get_state() != claiming_state::OPERATIONAL)
  49                 {
  50                         socketcan_j1939_t::signal_address_claiming_.wait(lock);
  51                         if(socket_addr_claimed->get_state() == claiming_state::INVALID)
  52                         {
  53                                 AFB_ERROR("Invalid state");
  54                                 return -1;
  55                         }
  56                 }
  57                 return socketcan_j1939_t::write_message(obj);
  58         }
  59 }